Search

Your search keyword '"E, Clément"' showing total 222 results
Start Over Author "E, Clément"

Refine your results

more »

more »

more »
222 results on '"E, Clément"'

1. Cross-shell states in 15C: A test for p-sd interactions

Author

J. Lois-Fuentes, B. Fernández-Domínguez, X. Pereira-López, F. Delaunay, W.N. Catford, A. Matta, N.A. Orr, T. Duguet, T. Otsuka, V. Somà, O. Sorlin, T. Suzuki, N.L. Achouri, M. Assié, S. Bailey, B. Bastin, Y. Blumenfeld, R. Borcea, M. Caamaño, L. Caceres, E. Clément, A. Corsi, N. Curtis, Q. Deshayes, F. Farget, M. Fisichella, G. de France, S. Franchoo, M. Freer, J. Gibelin, A. Gillibert, G.F. Grinyer, F. Hammache, O. Kamalou, A. Knapton, Tz. Kokalova, V. Lapoux, B. Le Crom, S. Leblond, F.M. Marqués, P. Morfouace, J. Pancin, L. Perrot, J. Piot, E. Pollacco, D. Ramos, D. Regueira-Castro, C. Rodríguez-Tajes, T. Roger, F. Rotaru, M. Sénoville, N. de Séréville, R. Smith, M. Stanoiu, I. Stefan, C. Stodel, D. Suzuki, J.C. Thomas, N. Timofeyuk, M. Vandebrouck, J. Walshe, and C. Wheldon

Subjects
One neutron pick-up reaction, Neutron-rich carbon isotopes, Phenomenological shell-model, Ab initio calculations, Physics, QC1-999
Abstract

The low-lying structure of 15C has been investigated via the neutron-removal 16C(d,t) reaction. Along with the known bound neutron sd-shell states, unbound p-shell hole states have been observed. The excitation energies and the deduced spectroscopic factors of the cross-shell states are an important measure of the [(p)−1(sd)2] neutron configurations in 15C. Our results show a very good agreement with shell-model calculations using the SFO-tls interaction for 15C. However, this same interaction predicted energies that were too low for the corresponding hole states in the N=9 isotone 17O and adjustment of the p-sd and sd-sd monopole terms was required to match the 17O energies. In addition, the excitation energies and spectroscopic factors have been compared to the first calculations of 15C with the ab initio self-consistent Green's function method employing the NNLOsat interaction. The results show the sensitivity to the size of the N=8 shell gap and highlight the need to go beyond the current truncation scheme.

Published
2023
Full Text
View/download PDF

2. Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer

Author

B. Le Crom, M. Assié, Y. Blumenfeld, J. Guillot, H. Sagawa, T. Suzuki, M. Honma, N.L. Achouri, B. Bastin, R. Borcea, W.N. Catford, E. Clément, L. Cáceres, M. Caamaño, A. Corsi, G. De France, F. Delaunay, N. De Séréville, B. Fernandez-Dominguez, M. Fisichella, S. Franchoo, A. Georgiadou, J. Gibelin, A. Gillibert, F. Hammache, O. Kamalou, A. Knapton, V. Lapoux, S. Leblond, A.O. Macchiavelli, F.M. Marqués, A. Matta, L. Ménager, P. Morfouace, N.A. Orr, J. Pancin, X. Pereira-Lopez, L. Perrot, J. Piot, E. Pollacco, D. Ramos, T. Roger, F. Rotaru, A.M. Sánchez-Benítez, M. Sénoville, O. Sorlin, M. Stanoiu, I. Stefan, C. Stodel, D. Suzuki, J.-C. Thomas, and M. Vandebrouck

Subjects
Radioactive beam, Direct reactions, Neutron-proton pairing, Cooper pairs, Physics, QC1-999
Abstract

The isovector and isoscalar components of neutron-proton pairing are investigated in the N=Z unstable nuclei of the fp-shell through the two-nucleon transfer reaction (p,3He) in inverse kinematics. The combination of particle and gamma-ray detection with radioactive beams of 56Ni and 52Fe, produced by fragmentation at the GANIL/LISE facility, made it possible to carry out this study for the first time in a closed and an open-shell nucleus in the fp-shell. The transfer cross-sections for ground-state to ground-state (J=0+, T=1) and to the first (J=1+, T=0) state were extracted for both cases together with the transfer cross-section ratios σ(0+,T=1)/σ(1+,T=0). They are compared with second-order distorted-wave born approximation (DWBA) calculations. The enhancement of the ground-state to ground-state pair transfer cross-section close to mid-shell, in 52Fe, points towards a superfluid phase in the isovector channel. For the “deuteron-like” transfer, very low cross-sections to the first (J=1+, T=0) state were observed both for 56Ni(p,3He) and 52Fe(p,3He) and are related to a strong hindrance of this channel due to spin-orbit effect. No evidence for an isoscalar deuteron-like condensate is observed.

Published
2022
Full Text
View/download PDF

3. Low-lying single-particle structure of 17C and the N = 14 sub-shell closure

Author

X. Pereira-López, B. Fernández-Domínguez, F. Delaunay, N.L. Achouri, N.A. Orr, W.N. Catford, M. Assié, S. Bailey, B. Bastin, Y. Blumenfeld, R. Borcea, M. Caamaño, L. Caceres, E. Clément, A. Corsi, N. Curtis, Q. Deshayes, F. Farget, M. Fisichella, G. de France, S. Franchoo, M. Freer, J. Gibelin, A. Gillibert, G.F. Grinyer, F. Hammache, O. Kamalou, A. Knapton, T. Kokalova, V. Lapoux, J.A. Lay, B. Le Crom, S. Leblond, J. Lois-Fuentes, F.M. Marqués, A. Matta, P. Morfouace, A.M. Moro, T. Otsuka, J. Pancin, L. Perrot, J. Piot, E. Pollacco, D. Ramos, C. Rodríguez-Tajes, T. Roger, F. Rotaru, M. Sénoville, N. de Séréville, R. Smith, O. Sorlin, M. Stanoiu, I. Stefan, C. Stodel, D. Suzuki, T. Suzuki, J.C. Thomas, N. Timofeyuk, M. Vandebrouck, J. Walshe, and C. Wheldon

Subjects
Physics, QC1-999
Abstract

The first investigation of the single-particle structure of the bound states of 17C, via the d(16C,p) transfer reaction, has been undertaken. The measured angular distributions confirm the spin-parity assignments of 1/2+ and 5/2+ for the excited states located at 217 and 335 keV, respectively. The spectroscopic factors deduced for these states exhibit a marked single-particle character, in agreement with shell model and particle-core model calculations, and combined with their near degeneracy in energy provide clear evidence for the absence of the N=14 sub-shell closure. The very small spectroscopic factor found for the 3/2+ ground state is consistent with theoretical predictions and indicates that the ν1d3/2 strength is carried by unbound states. With a dominant ℓ=0 valence neutron configuration and a very low separation energy, the 1/2+ excited state is a one-neutron halo candidate.

Published
2020
Full Text
View/download PDF

4. Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number

Author

R. Avigo, O. Wieland, A. Bracco, F. Camera, F. Ameil, T. Arici, A. Ataç, D. Barrientos, D. Bazzacco, P. Bednarczyk, G. Benzoni, B. Birkenbach, N. Blasi, H.C. Boston, S. Bottoni, S. Brambilla, B. Bruyneel, M. Ciemała, E. Clément, M.L. Cortés, F.C.L. Crespi, D.M. Cullen, D. Curien, F. Didierjean, C. Domingo-Pardo, G. Duchêne, J. Eberth, A. Görgen, A. Gadea, J. Gerl, N. Goel, P. Golubev, V. González, M. Górska, A. Gottardo, E. Gregor, G. Guastalla, T. Habermann, L.J. Harkness-Brennan, A. Jungclaus, M. Kmiecik, I. Kojouharov, W. Korten, N. Kurz, M. Labiche, N. Lalović, S. Leoni, M. Lettmann, A. Maj, R. Menegazzo, D. Mengoni, E. Merchan, B. Million, A.I. Morales, D.R. Napoli, C. Nociforo, J. Nyberg, N. Pietralla, S. Pietri, Zs. Podolyák, V.Yu. Ponomarev, A. Pullia, B. Quintana, G. Rainovski, D. Ralet, F. Recchia, M. Reese, P. Regan, P. Reiter, S. Riboldi, D. Rudolph, M.D. Salsac, E. Sanchis, L.G. Sarmiento, H. Schaffner, J. Simpson, O. Stezowski, J.J. Valiente-Dobón, and H.J. Wollersheim

Subjects
64Fe, 62Fe, Nuclear structure, Dipole excitation around neutron threshold, Physics, QC1-999
Abstract

The γ-ray emission from the nuclei 62,64Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei 62,64Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1− states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy.

Published
2020
Full Text
View/download PDF

5. Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in 106,108Sn

Author

M. Siciliano, J.J. Valiente-Dobón, A. Goasduff, F. Nowacki, A.P. Zuker, D. Bazzacco, A. Lopez-Martens, E. Clément, G. Benzoni, T. Braunroth, F.C.L. Crespi, N. Cieplicka-Oryńczak, M. Doncel, S. Ertürk, G. de France, C. Fransen, A. Gadea, G. Georgiev, A. Goldkuhle, U. Jakobsson, G. Jaworski, P.R. John, I. Kuti, A. Lemasson, T. Marchi, D. Mengoni, C. Michelagnoli, T. Mijatović, C. Müller-Gatermann, D.R. Napoli, J. Nyberg, M. Palacz, R.M. Pérez-Vidal, B. Sayği, D. Sohler, S. Szilner, D. Testov, M. Zielińska, D. Barrientos, B. Birkenbach, H.C. Boston, A.J. Boston, B. Cederwall, J. Collado, D.M. Cullen, P. Désesquelles, C. Domingo-Pardo, J. Dudouet, J. Eberth, F.J. Egea-Canet, V. González, L.J. Harkness-Brennan, H. Hess, D.S. Judson, A. Jungclaus, W. Korten, M. Labiche, A. Lefevre, S. Leoni, H. Li, A. Maj, R. Menegazzo, B. Million, A. Pullia, F. Recchia, P. Reiter, M.D. Salsac, E. Sanchis, O. Stezowski, and Ch. Theisen

Subjects
Lifetime, Nuclear structure, Multi-nucleon transfer, Light Sn, Tracking array, Physics, QC1-999
Abstract

The lifetimes of the low-lying excited states 2+ and 4+ have been directly measured in the neutron-deficient 106,108Sn isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted γ rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the B(E2;21+→0g.s.+) values and it describes well the experimental pattern for 104−114Sn; the B(E2;41+→21+) values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in 108Sn.

Published
2020
Full Text
View/download PDF

6. The impact of the intruder orbitals on the structure of neutron-rich Ag isotopes

Author

Y.H. Kim, S. Biswas, M. Rejmund, A. Navin, A. Lemasson, S. Bhattacharyya, M. Caamaño, E. Clément, G. de France, and B. Jacquot

Subjects
Ag isotopes, Isotopic identification, Fission fragments, Large isospin and high angular momentum, Signature splitting and inversion, Shell-model, Physics, QC1-999
Abstract

The low-lying high-spin yrast band structure of neutron-rich 113,118–121Ag has been established for the first time using prompt γ-ray spectroscopy of isotopically identified fission fragments produced in the 9Be(238U, fγ) fusion- and transfer-induced fission processes. The newly obtained level energies follow the systematics of the neighboring isotopes. The sequences of levels exhibit an energy inheritance from states in the corresponding Cd core. A striking constancy of a large signature splitting in odd-A Ag throughout the long chain of isotopes with 50

Published
2017
Full Text
View/download PDF

7. Evolution of triaxial shapes at large isospin: Rh isotopes

Author

A. Navin, M. Rejmund, S. Bhattacharyya, R. Palit, G.H. Bhat, J.A. Sheikh, A. Lemasson, S. Bhattacharya, M. Caamaño, E. Clément, O. Delaune, F. Farget, G. de France, and B. Jacquot

Subjects
Isotopic identification of fission fragments, Neutron-rich Rh isotopes, Triaxial projected shell model, Nuclear triaxiality, Physics, QC1-999
Abstract

The rotational response as a function of neutron–proton asymmetry for the very neutron-rich isotopes of Rh (116–119Rh) has been obtained from the measurement of prompt γ rays from isotopically identified fragments, produced in fission reactions at energies around the Coulomb barrier. The measured energy “signature” splitting of the yrast bands, when compared with the Triaxial Projected Shell Model (TPSM) calculations, shows the need for large, nearly constant, triaxial deformations. The present results are compared with global predictions for the existence of non axial shapes in the periodic table in the case of very neutron-rich nuclei Rh isotopes. The predicted trend of a second local maximum for a triaxial shape around N∼74 is not found.

Published
2017
Full Text
View/download PDF

8. Evidence of octupole-phonons at high spin in 207Pb

Author

D. Ralet, E. Clément, G. Georgiev, A.E. Stuchbery, M. Rejmund, P. Van Isacker, G. de France, A. Lemasson, J. Ljungvall, C. Michelagnoli, A. Navin, D.L. Balabanski, L. Atanasova, A. Blazhev, G. Bocchi, R. Carroll, J. Dudouet, E. Dupont, B. Fornal, S. Franchoo, C. Fransen, C. Müller-Gatermann, A. Goasduff, A. Gadea, P.R. John, D. Kocheva, T. Konstantinopoulos, A. Korichi, A. Kusoglu, S.M. Lenzi, S. Leoni, R. Lozeva, A. Maj, R. Perez, N. Pietralla, C. Shand, O. Stezowski, D. Wilmsen, D. Yordanov, D. Barrientos, P. Bednarczyk, B. Birkenbach, A.J. Boston, H.C. Boston, I. Burrows, B. Cederwall, M. Ciemala, J. Collado, F. Crespi, D. Cullen, H.J. Eberth, J. Goupil, L. Harkness, H. Hess, A. Jungclaus, W. Korten, M. Labiche, R. Menegazzo, D. Mengoni, B. Million, J. Nyberg, Zs. Podolyák, A. Pullia, B. Quintana Arnés, F. Recchia, P. Reiter, F. Saillant, M.D. Salsac, E. Sanchis, C. Theisen, J.J. Valiente Dobon, and O. Wieland

Subjects
Physics, QC1-999
Abstract

A lifetime measurement of the 19/2− state in 207Pb has been performed using the Recoil Distance Doppler-Shift (RDDS) method. The nuclei of interest were produced in multi-nucleon transfer reactions induced by a 208Pb beam impinging on a 100Mo enriched target. The beam-like nuclei were detected and identified in terms of their atomic mass number in the VAMOS++ spectrometer while the prompt γ rays were detected by the AGATA tracking array. The measured large reduced transition probability B(E3,19/2−→13/2+)=40(8) W.u. is the first indication of the octupole phonon at high spin in 207Pb. An analysis in terms of a particle-octupole-vibration coupling model indicates that the measured B(E3) value in 207Pb is compatible with the contributions from single-phonon and single particle E3 as well as E3 strength arising from the double-octupole-phonon 6+ state, all adding coherently. A crucial aspect of the coupling model, namely the strong mixing between single-hole and the phonon-hole states, is confirmed in a realistic shell-model calculation. Keywords: AGATA spectrometer, γ-Ray tracking, VAMOS++ spectrometer, Plunger device, Nuclear deformation, Octupole phonon

Published
2019
Full Text
View/download PDF

9. Nuclear structure advancements with multi-nucleon transfer reactions

Author

R. M. Pérez-Vidal, F. Galtarossa, T. Mijatović, S. Szilner, I. Zanon, D. Brugnara, J. Pellumaj, M. Ciemala, J. J. Valiente-Dobón, L. Corradi, E. Clément, S. Leoni, B. Fornal, M. Siciliano, A. Gadea, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Physics, multinucleon transfer reactions, gamma array
Abstract

Multi-Nucleon Transfer (MNT) reactions have been used for decades as a reaction mechanism, in order to populate excited states in nuclei far from stability and to perform nuclear structure studies. Nevertheless, the development of set-ups involving high acceptance tracking magnetic spectrometers (mainly existing in Europe), coupled with the Advanced GAmma Tracking Array (AGATA) opens new possibilities, especially if they are used in conjunction with high-intensity stable beams or ISOL RIBs. In this article, we will discuss the capabilities of such set-ups aiming at different goals, including complete information in high-resolution spectroscopy as well as lifetime measurements.

Published
2023

10. Electromagnetic properties of neutron-rich nuclei adjacent to the Z=50 shell closure

Author

M. Rejmund, A. Navin, S. Biswas, A. Lemasson, M. Caamaño, E. Clément, O. Delaune, F. Farget, G. de France, B. Jacquot, and P. Van Isacker

Subjects
Isotopic identification, Large isospin and high angular momentum, Spin orbit partners, In-Sb isotopes, M1/E2 transitions, Seniority, Physics, QC1-999
Abstract

Low-lying high-spin yrast states in the exotic odd–odd isotopes 124–128Sb (Z=51) and 118–128In (Z=49), studied for the first time, show a striking difference in their observed γ-ray decay. With a single valence proton particle/hole occupying the g7/2/g9/2 spin-orbit partners, dominant electric quadrupole transitions occur in Sb as opposed to magnetic dipole transitions in In. The observed properties are explained on the basis of general principles of symmetry and with large-scale shell-model calculations, and reveal novel aspects of the competition between the neutron–proton interaction and the like-nucleon pairing interaction.

Published
2016
Full Text
View/download PDF

11. Spectroscopic quadrupole moments in Xe124

Author

E. Clément, A. Lemasson, M. Rejmund, B. Jacquot, D. Ralet, C. Michelagnoli, D. Barrientos, P. Bednarczyk, G. Benzoni, A. J. Boston, A. Bracco, B. Cederwall, M. Ciemala, J. Collado, F. Crespi, C. Domingo-Pardo, J. Dudouet, H. J. Eberth, G. de France, A. Gadea, V. Gonzalez, A. Gottardo, L. Harkness, H. Hess, A. Jungclaus, A. Kaşkaş, W. Korten, S. M. Lenzi, S. Leoni, J. Ljungvall, R. Menegazzo, D. Mengoni, B. Million, D. R. Napoli, J. Nyberg, Zs. Podolyak, A. Pullia, B. Quintana Arnés, F. Recchia, N. Redon, P. Reiter, M. D.Salsac, E. Sanchis, M. Şenyiğit, M. Siciliano, D. Sohler, O. Stezowski, C. Theisen, J. J. Valiente Dobón, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Science and Technology Facilities Council (UK), Agence Nationale de la Recherche (France), Department of Energy (US), Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, and Clément, E.

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

9 pags., 8 figs., 4 tabs., Background: The Xe isotopic chain with four valence protons above the Z=50 shell closure is an ideal laboratory for the study of the evolution of nuclear deformation. At the N=82 shell closure, Xe136 presents all characteristics of a doubly closed shell nucleus with a spherical shape. In the very neutron-deficient isotopes close to N=50, the α-decay chain of Xe was investigated to probe the radioactive decay properties near the drip-line and the magicity of Sn100. Additionally, the Xe isotopes present higher order symmetries in the nuclear deformation such as the octupole degree of freedom near N=60 and N=90 or O(6) symmetry in stable isotopes. Purpose: The relevance of the O(6) symmetry has been investigated by measuring the spectroscopic quadrupole moment of the first excited states in Xe124. In the O(6) symmetry limit, the spectroscopic quadrupole moment of collective states is expected to be null. Method: A stable Xe124 beam with energies of 4.03A MeV and 4.11A MeV was used to bombard a natW target at the GANIL facility. Excited states were populated via the safe Coulomb excitation reaction. The collision of the heavy ions with a large Z at low energy make this reaction sensitive to the diagonal E2 matrix element of the excited states. The recoils were detected in the VAMOS++ magnetic spectrometer and the γ rays in the AGATA tracking array. The least squares fitting code gosia was used for the analysis to extract both E2 and M1 transitional and E2 diagonal matrix elements. Results: The rotational ground state band was populated up to the 81+ state as well as the 22+ and 42+ states. Using high precision spectroscopic data to constrain the gosia fit, the spectroscopic quadrupole moments of the 21+, 41+, and 61+ states were determined for the first time. Conclusions: The spectroscopic quadrupole moments were found to be negative, large, and constant in the ground state band underlining the prolate axially deformed ground state band of Xe124. The present experimental data confirm that the O(6) symmetry is substantially broken in Xe124., This work was supported by STFC(UK). This research was also supported by the OASIS Project No. ANR-17-CE31-0026, by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357, by the European Regional Development Fund with Contract No. GINOP-2.3.3-15-2016-00034 and by the Spanish Ministerio de Ciencia e Innovacion under contract PID2020-118265GB-C41. Work partially supported by Grants FPA2017-84756-C4, PID2020- 118265GB-C4 by MCIN/ AEI /10.13039/501100011033, PROMETEO/2019/005 by Generalitat Valenciana and by the FEDER EU funds.

Published
2023

12. Conceptual design of the AGATA 2π array at LNL

Author

J.J. Valiente-Dobón, R. Menegazzo, A. Goasduff, D. Agguiaro, P. Aguilera, F. Angelini, M. Balogh, D. Bazzacco, J. Benito, G. Benzoni, N. Bez, M. Bolognesi, S. Bottoni, D. Brugnara, S. Carollo, P. Cocconi, A. Cogo, J. Collado, F.C.L. Crespi, A. Ertoprak, R. Escudeiro, F. Galtarossa, E.R. Gamba, A. Gambalonga, B. Góngora Servín, A. Gottardo, A. Gozzelino, M. Gulmini, Z. Huang, T. Marchi, D. Mengoni, P. Modanese, D.R. Napoli, J. Pellumaj, R.M. Pérez-Vidal, S. Pigliapoco, E. Pilotto, L. Ramina, M. Rampazzo, W. Raniero, M. Rebeschini, K. Rezynkina, D. Rosso, M. Scarcioffolo, D. Scarpa, M. Sedlák, R. Smith, N. Toniolo, F. Veronese, V. Volpe, L. Zago, I. Zanon, G. Zhang, R. Abels, M.L. Allegrini, C. Aufranc, G. Baulieu, C. Belkhiria, M. Benettoni, D. Benini, M. Bentley, M. Biasotto, M. Blaizot, J. Blasco Miquel, C. Boiano, A. Boston, H. Boston, A. Boujrad, P. Bourgault, A. Bracco, S. Brambilla, I. Burrows, F. Camera, S. Capra, A. Capsoni, R. Cash, J.V. Civera, E. Clément, S. Coelli, M. Cordwell, L. Corradi, S. Coudert, G. De Angelis, L. De Ruvo, G. Debras, M. Del Fabbro, J. Diklić, N. Dosme, G. Duchene, B. Duclos, J. Dudouet, J. Eberth, S. Elloumi, C. Everett, S. Fantinel, M. Fillinger, E. Fioretto, C. Fransen, A. Gadea, L. Gibelin, V. González, J. Goupil, C. Görgen, A. Grant, K. Green, J. Ha, T. Hartnett, K. Henseler, H. Hess, R. Hirsch, C. Houarner, J. Jacob, T. Joannem, D.S. Judson, N. Karkour, M. Karolak, M. Kebbiri, J. Kieffer, M. Labiche, X. Lafay, P. Le Jeannic, A. Lefevre, E. Legay, F. Legruel, S. Lenzi, S. Leoni, D. Linget, M. Liptrot, A. López-Martens, A. Lotodé, L. Manara, L. Ménager, T. Mijatović, B. Million, A. Minarello, G. Montagnoli, P. Morrall, I. Mullacrane, J. Nyberg, G. Philippon, M. Polettini, F. Popieul, A. Pullia, F. Recchia, P. Reiter, G. Richardt, M. Rocchini, A. Roger, F. Saillant, E. Sanchis, Md.S.R. Laskar, G. Secci, M.-H. Sigward, J. Simpson, N. Solenne, F. Spee, A.M. Stefanini, O. Stézowski, S. Szilner, N. Templeton, Ch. Theisen, S. Thiel, F. Tomasi, S. Tzvetkov, D. Vigano, E. Viscione, O. Wieland, K. Wimmer, G. Wittwer, M. Zielińska, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
AGATA spectrometer, DANTE detector, EUCLIDES detector, LNL facility, Plunger device, PRISMA spectrometer, Pulse shape analysis, TRACE detector, γ-ray tracking, Nuclear and High Energy Physics, Settore FIS/04 - Fisica Nucleare e Subnucleare, ray tracking, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation
Abstract

International audience; The Advanced GAmma Tracking Array (AGATA) has been installed at Laboratori Nazionali di Legnaro (LNL), Italy. In this installation, AGATA will consist, at the beginning, of 13 AGATA triple clusters (ATCs) with an angular coverage of 1π, and progressively the number of ATCs will increase up to a 2π angular coverage. This setup will exploit both stable and radioactive ion beams delivered by the Tandem–PIAVE-ALPI accelerator complex and the SPES facility. The new implementation of AGATA at LNL will be used in two different configurations, firstly one coupled to the PRISMA large-acceptance magnetic spectrometer and lately a second one at Zero Degrees, along the beam line. These two configurations will allow us to cover a broad physics program, using different reaction mechanisms, such as Coulomb excitation, fusion-evaporation, transfer and fission at energies close to the Coulomb barrier. These setups have been designed to be coupled with a large variety of complementary detectors such as charged particle detectors, neutron detectors, heavy-ion detectors, high-energy γ-ray arrays, cryogenic and gasjet targets and the plunger device for lifetime measurements. We present in this paper the conceptual design, characteristics and performance figures of this implementation of AGATA at LNL.

Published
2023

13. Evidence of Partial Seniority Conservation in the πg_{9/2} Shell for the N=50 Isotones

Author

R M, Pérez-Vidal, A, Gadea, C, Domingo-Pardo, A, Gargano, J J, Valiente-Dobón, E, Clément, A, Lemasson, L, Coraggio, M, Siciliano, S, Szilner, M, Bast, T, Braunroth, J, Collado, A, Corina, A, Dewald, M, Doncel, J, Dudouet, G, de France, C, Fransen, V, González, T, Hüyük, B, Jacquot, P R, John, A, Jungclaus, Y H, Kim, A, Korichi, M, Labiche, S, Lenzi, H, Li, J, Ljungvall, A, López-Martens, D, Mengoni, C, Michelagnoli, C, Müller-Gatermann, D R, Napoli, A, Navin, B, Quintana, D, Ramos, M, Rejmund, E, Sanchis, J, Simpson, O, Stezowski, D, Wilmsen, M, Zielińska, A J, Boston, D, Barrientos, P, Bednarczyk, G, Benzoni, B, Birkenbach, H C, Boston, A, Bracco, B, Cederwall, D M, Cullen, F, Didierjean, J, Eberth, A, Gottardo, J, Goupil, L J, Harkness-Brennan, H, Hess, D S, Judson, A, Kaşkaş, W, Korten, S, Leoni, R, Menegazzo, B, Million, J, Nyberg, Zs, Podolyak, A, Pullia, D, Ralet, F, Recchia, P, Reiter, K, Rezynkina, M D, Salsac, M, Şenyiğit, D, Sohler, Ch, Theisen, D, Verney, Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, European Commission, Department of Energy (US), Croatian Science Foundation, and Pérez-Vidal, R.M.

Abstract

7 pags., 3 figs., 1 tab., The reduced transition probabilities for the 4_{1}^{+}→2_{1}^{+} and 2_{1}^{+}→0_{1}^{+} transitions in ^{92}Mo and ^{94}Ru and for the 4_{1}^{+}→2_{1}^{+} and 6_{1}^{+}→4_{1}^{+} transitions in ^{90}Zr have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the f_{5/2}, p_{3/2}, p_{1/2}, and g_{9/2} proton valence space. Only the combination of extensive lifetime information and large scale shell-model calculations allowed the extent of the seniority conservation in the N=50 g_{9/2} orbital to be understood. The conclusion is that seniority is largely conserved in the first πg_{9/2} orbital., This work was partially supported by MCIN/AEI/10.13039/501100011033 and Generalitat Valenciana, Spain, under Grants No. FPA2017-84756-C4, No. PID2020–118265GB-C4, and No. PROMETEO 2019/005, by the EU FEDER funds, by the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. n654002, by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357, by STFC(UK) and by the Croatian Science Foundation under Projects No. 7194 and No. IP-2018-01-1257.

Published
2022

14. Evidence of Partial Seniority Conservation in the πg9/2 Shell for the N=50 Isotones

Author

R. M. Pérez-Vidal, A. Gadea, C. Domingo-Pardo, A. Gargano, J. J. Valiente-Dobón, E. Clément, A. Lemasson, L. Coraggio, M. Siciliano, S. Szilner, M. Bast, T. Braunroth, J. Collado, A. Corina, A. Dewald, M. Doncel, J. Dudouet, G. de France, C. Fransen, V. González, T. Hüyük, B. Jacquot, P. R. John, A. Jungclaus, Y. H. Kim, A. Korichi, M. Labiche, S. Lenzi, H. Li, J. Ljungvall, A. López-Martens, D. Mengoni, C. Michelagnoli, C. Müller-Gatermann, D. R. Napoli, A. Navin, B. Quintana, D. Ramos, M. Rejmund, E. Sanchis, J. Simpson, O. Stezowski, D. Wilmsen, M. Zielińska, A. J. Boston, D. Barrientos, P. Bednarczyk, G. Benzoni, B. Birkenbach, H. C. Boston, A. Bracco, B. Cederwall, D. M. Cullen, F. Didierjean, J. Eberth, A. Gottardo, J. Goupil, L. J. Harkness-Brennan, H. Hess, D. S. Judson, A. Kaşkaş, W. Korten, S. Leoni, R. Menegazzo, B. Million, J. Nyberg, Zs. Podolyak, A. Pullia, D. Ralet, F. Recchia, P. Reiter, K. Rezynkina, M. D. Salsac, M. Şenyiğit, D. Sohler, Ch. Theisen, and D. Verney

Subjects
General Physics and Astronomy
Published
2022

15. Structure of As83, As85, and As87 : From semimagicity to γ softness

Author

K. Rezynkina, D. D. Dao, G. Duchêne, J. Dudouet, F. Nowacki, E. Clément, A. Lemasson, C. Andreoiu, A. Astier, G. de Angelis, G. de France, C. Delafosse, I. Deloncle, F. Didierjean, Z. Dombradi, C. Ducoin, A. Gadea, A. Gottardo, D. Guinet, B. Jacquot, P. Jones, T. Konstantinopoulos, I. Kuti, A. Korichi, S. M. Lenzi, G. Li, F. Le Blanc, C. Lizarazo, R. Lozeva, G. Maquart, B. Million, C. Michelagnoli, D. R. Napoli, A. Navin, R. M. Pérez-Vidal, C. M. Petrache, N. Pietralla, D. Ralet, M. Ramdhane, M. Rejmund, O. Stezowski, C. Schmitt, D. Sohler, and D. Verney

Published
2022

16. CATLIFE (Complementary Arm for Target LIke FragmEnts): Spectrometer for Target like fragments at VAMOS++

Author

Y. Son, Y.H. Kim, Y. Cho, S. Choi, J. Park, S. Bae, K.I. Hahn, A. Navin, A. Lemasson, M. Rejmund, D. Ramos, E. Clément, D. Ackermann, A. Utepov, C. Fougeres, J.C. Thomas, J. Goupil, G. Fremont, G. de France, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], VAMOS++, Multi-nucleon transfer reaction, Delayed γ-ray, Instrumentation
Abstract

International audience; The multi-nucleon transfer reaction between 136Xe beam and 198Pt target at the beam energy 7 MeV/u was studied using the large acceptance spectrometer VAMOS++ coupled with the newly installed second arm time-of-flight and delayed γ-ray spectrometer CATLIFE (Complementary Arm for Target LIke FragmEnts). The CATLIFE detector is composed of a large area multi-wire proportional chamber and the EXOGAM HPGe clover detectors with an ion flight length of 1230 mm. Direct measurement of the target-like fragments (TLF) and the delayed γ-rays from the isomeric state helps to improve TLF identification. The use of the velocity of TLFs and the delayed γ-ray demonstrate the proof of principle and effectiveness of the new setup.

Published
2022

17. New narrow resonances observed in the unbound nucleus F15

Author

V. Girard-Alcindor, A. Mercenne, I. Stefan, F. de Oliveira Santos, N. Michel, M. Płoszajczak, M. Assié, A. Lemasson, E. Clément, F. Flavigny, A. Matta, D. Ramos, M. Rejmund, J. Dudouet, D. Ackermann, P. Adsley, M. Assunção, B. Bastin, D. Beaumel, G. Benzoni, R. Borcea, A. J. Boston, D. Brugnara, L. Cáceres, B. Cederwall, I. Celikovic, V. Chudoba, M. Ciemala, J. Collado, F. C. L. Crespi, G. D'Agata, G. De France, F. Delaunay, C. Diget, C. Domingo-Pardo, J. Eberth, C. Fougères, S. Franchoo, F. Galtarossa, A. Georgiadou, J. Gibelin, S. Giraud, V. González, N. Goyal, A. Gottardo, J. Goupil, S. Grévy, V. Guimaraes, F. Hammache, L. J. Harkness-Brennan, H. Hess, N. Jovančević, D. S. Judson Oliver, O. Kamalou, A. Kamenyero, J. Kiener, W. Korten, S. Koyama, M. Labiche, L. Lalanne, V. Lapoux, S. Leblond, A. Lefevre, C. Lenain, S. Leoni, H. Li, A. Lopez-Martens, A. Maj, I. Matea, R. Menegazzo, D. Mengoni, A. Meyer, B. Million, B. Monteagudo, P. Morfouace, J. Mrazek, M. Niikura, J. Piot, Zs. Podolyak, C. Portail, A. Pullia, B. Quintana, F. Recchia, P. Reiter, K. Rezynkina, T. Roger, J. S. Rojo, F. Rotaru, M. D. Salsac, A. M. Sánchez Benítez, E. Sanchis, M. Şenyigit, N. de Séréville, M. Siciliano, J. Simpson, D. Sohler, O. Sorlin, M. Stanoiu, C. Stodel, D. Suzuki, C. Theisen, D. Thisse, J. C.Thomas, P. Ujic, J. J. Valiente-Dobón, and M. Zielińska

Published
2022

18. Spectroscopy of neutron-rich nitrogen isotopes with Agata+Paris+Vamos

Author

S. Ziliani, M. Ciemała, F.C.L. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M.N. Harakeh, Ł.W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S.M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D.R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Ziębliński, M. Zielińska, Ziliani, S., Ciemała, M., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., de France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, Ł. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Müller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), ILL, and Research unit Nuclear & Hadron Physics

Subjects
Physics, education.field_of_study, Spectrometer, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Population, Gamma ray, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Excited state, 0103 physical sciences, Neutron, AGATA, 010306 general physics, Spectroscopy, education, Beam (structure)
Abstract

Excited states of 17N, 18N and 19N were investigated through the measurement of gamma rays, following their population via deep-inelastic reactions induced by an 18O beam (7 MeV/u) on a thick 181Ta target. The experimental setup comprised the AGATA+PARIS detection system, coupled to the VAMOS++ magnetic spectrometer. In the 17N nucleus, the analysis of gamma-ray transitions de-exciting two states around 4-5 MeV clearly pointed to discrepancies with the lifetime values reported in literature. Three new gamma rays were observed in 18N at the energies of 1662.3 (3) keV, 2073.4 (8) keV and 2300.9 (8) keV, and hints for other two new transitions around 1566 keV and 1720 keV were found. In addition, a new transition with energy of 2489.7 (8) keV was observed in 19N.

Published
2020

19. Neutron-proton pairing in the N=Z radioactive fp-shell nuclei $^{56}$Ni and $^{52}$Fe probed by pair transfer

Author

B. Le Crom, M. Assié, Y. Blumenfeld, J. Guillot, H. Sagawa, T. Suzuki, M. Honma, N.L. Achouri, B. Bastin, R. Borcea, W.N. Catford, E. Clément, L. Cáceres, M. Caamaño, A. Corsi, G. De France, F. Delaunay, N. De Séréville, B. Fernandez-Dominguez, M. Fisichella, S. Franchoo, A. Georgiadou, J. Gibelin, A. Gillibert, F. Hammache, O. Kamalou, A. Knapton, V. Lapoux, S. Leblond, A.O. Macchiavelli, F.M. Marqués, A. Matta, L. Ménager, P. Morfouace, N.A. Orr, J. Pancin, X. Pereira-Lopez, L. Perrot, J. Piot, E. Pollacco, D. Ramos, T. Roger, F. Rotaru, A.M. Sánchez-Benítez, M. Sénoville, O. Sorlin, M. Stanoiu, I. Stefan, C. Stodel, D. Suzuki, J.-C. Thomas, M. Vandebrouck, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear and High Energy Physics, Nuclear Theory, Direct reactions, FOS: Physical sciences, Radioactive beam, Neutron-proton pairing, 22 Física, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Cooper pairs
Abstract

The isovector and isoscalar components of neutron-proton pairing are investigated in the N=Z unstable nuclei of the \textit{fp}-shell through the two-nucleon transfer reaction (p,$^3$He) in inverse kinematics. The combination of particle and gamma-ray detection with radioactive beams of $^{56}$Ni and $^{52}$Fe, produced by fragmentation at the GANIL/LISE facility, made it possible to carry out this study for the first time in a closed and an open-shell nucleus in the \textit{fp}-shell. The transfer cross-sections for ground-state to ground-state (J=0$^+$,T=1) and to the first (J=1$^+$,T=0) state were extracted for both cases together with the transfer cross-section ratios $\sigma$(0$^+$,T=1) /$\sigma$(1$^+$,T=0). They are compared with second-order distorted-wave born approximation (DWBA) calculations. The enhancement of the ground-state to ground-state pair transfer cross-section close to mid-shell, in $^{52}$Fe, points towards a superfluid phase in the isovector channel. For the "deuteron-like" transfer, very low cross-sections to the first (J=1$^+$,T=0) state were observed both for \Ni\phe\, and \Fe\phe\, and are related to a strong hindrance of this channel due to spin-orbit effect. No evidence for an isoscalar deuteron-like condensate is observed., Comment: 7 pages, 4 figures

Published
2022

20. Evidence for spherical-oblate shape coexistence in Tc-87

Author

X. Liu, B. Cederwall, C. Qi, R. A. Wyss, Ö. Aktas, A. Ertoprak, W. Zhang, E. Clément, G. de France, D. Ralet, A. Gadea, A. Goasduff, G. Jaworski, I. Kuti, B. M. Nyakó, J. Nyberg, M. Palacz, R. Wadsworth, J. J. Valiente-Dobón, H. Al-Azri, A. Ataç Nyberg, T. Bäck, G. de Angelis, M. Doncel, J. Dudouet, A. Gottardo, M. Jurado, J. Ljungvall, D. Mengoni, D. R. Napoli, C. M. Petrache, D. Sohler, J. Timár, D. Barrientos, P. Bednarczyk, G. Benzoni, B. Birkenbach, A. J. Boston, H. C. Boston, I. Burrows, L. Charles, M. Ciemala, F. C. L. Crespi, D. M. Cullen, P. Désesquelles, C. Domingo-Pardo, J. Eberth, N. Erduran, S. Ertürk, V. González, J. Goupil, H. Hess, T. Huyuk, A. Jungclaus, W. Korten, A. Lemasson, S. Leoni, A. Maj, R. Menegazzo, B. Million, R. M. Perez-Vidal, Zs. Podolyàk, A. Pullia, F. Recchia, P. Reiter, F. Saillant, M. D. Salsac, E. Sanchis, J. Simpson, O. Stezowski, C. Theisen, M. Zielińska, Swedish Research Council, Science and Technology Facilities Council (UK), National Science Centre (Poland), National Research, Development and Innovation Office (Hungary), Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, China Scholarship Council, and Liu, X.

Subjects
Subatomär fysik, Atom and Molecular Physics and Optics, Subatomic Physics, Atom- och molekylfysik och optik
Abstract

6 pags., 8 figs., 1 tab., Excited states in the neutron-deficient nucleus Tc87 have been studied via the fusion-evaporation reaction Fe54(Ar36,2n1p)Tc87 at 115 MeV beam energy. The AGATA γ-ray spectrometer coupled to the DIAMANT, NEDA, and Neutron Wall detector arrays for light-particle detection was used to measure the prompt coincidence of γ rays and light particles. Six transitions from the deexcitation of excited states belonging to a new band in Tc87 were identified by comparing γ-ray intensities in the spectra gated under different reaction channel selection conditions. The constructed level structure was compared with the shell model and total Routhian surface calculations. The results indicate that the new band structure in Tc87 is built on a spherical configuration, which is different from that assigned to the previously identified oblate yrast rotational band., This work was supported by the Swedish Research Council under Grants No. 621-2014-5558 and No. 2019-04880; the EU 7th Framework Programme, Integrating Activities Transnational Access, Project No. 262010 ENSAR; the UK STFC under Grants No. ST/L005727/1 and No. ST/P003885/1; the Polish National Science Centre, Grants No. 2016/22/M/ST2/00269 and No. 2017/25/B/ST2/01569; COPIN-INFN, COPIN-IN2P3, and COPIGAL projects; the National Research, Development and Innovation Fund of Hungary (Project No. K128947); the European Regional Development Fund (Contract No. GINOP-2.3.3-15-2016-00034); the Hungarian National Research, Development and Innovation Office, NKFIH, Contract No. PD124717; the Ministerio de Ciencia e Innovación and Generalitat Valenciana, Spain, under the Grants No. SEV-2014-0398 and No. FPA2017-84756-C4; PROMETEO/2019/005; and by the EU FEDER funds. X.L. gratefully acknowledges support from the China Scholarship Council, Grant No. 201700260183, for his stay in Sweden. We acknowledge the support from the AGATA Collaboration and thank the GANIL staff for excellent technical support and operation

Published
2022

21. $^{178}$Hg and asymmetric fission of neutron-deficient pre-actinides

Author

A. Jhingan, C. Schmitt, A. Lemasson, S. Biswas, Y. H. Kim, D. Ramos, A. N. Andreyev, D. Curien, M. Ciemała, E. Clément, O. Dorvaux, B. De Canditiis, F. Didierjean, G. Duchêne, J. Dudouet, J. Frankland, G. Frémont, J. Goupil, B. Jacquot, C. Raison, D. Ralet, B.-M. Retailleau, L. Stuttgé, I. Tsekhanovich, A. V. Andreev, S. Goriely, S. Hilaire, J.-F. Lemaître, P. Möller, K.-H. Schmidt, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
Nuclear Theory (nucl-th), Nuclear Theory, FOS: Physical sciences, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Fission at low excitation energy is an ideal playground to probe the impact of nuclear structure on nuclear dynamics. While the importance of structural effects in the nascent fragments is well established in the (trans-)actinide region, the observation of asymmetric fission in several neutron-deficient pre-actinides can be explained by various mechanisms. To deepen our insight into that puzzle, an innovative approach based on inverse kinematics and an enhanced version of the VAMOS++ heavy-ion spectrometer was implemented at the GANIL facility, Caen. Fission of $^{178}$Hg was induced by fusion of $^{124}$Xe and $^{54}$Fe. The two fragments were detected in coincidence using VAMOS++ supplemented with a new SEcond Detection arm. For the first time in the pre-actinide region, access to the pre-neutron mass and total kinetic energy distributions, and the simultaneous isotopic identification of one the fission fragment, was achieved. The present work describes the experimental approach, and discusses the pre-neutron observables in the context of an extended asymmetricfission island located southwest of $^{208}$Pb. A comparison with different models is performed, demonstrating the importance of this new asymmetric-fission island for elaborating on driving effects in fission. Fission at low excitation energy is an ideal playground to probe the impact of nuclear structure on nuclear dynamics. While the importance of structural effects in the nascent fragments is well-established in the (trans-)actinide region, the observation of asymmetric fission in several neutron-deficient pre-actinides can be explained by various mechanisms. To deepen our insight into that puzzle, an innovative approach based on inverse kinematics and an enhanced version of the VAMOS++ heavy-ion spectrometer was implemented at the GANIL facility, Caen. Fission of $^{178}$Hg was induced by fusion of $^{124}$Xe and $^{54}$Fe. The two fragments were detected in coincidence using VAMOS++ supplemented with a new SEcond Detection arm. For the first time in the pre-actinide region, access to the pre-neutron mass and total kinetic energy distributions, and the simultaneous isotopic identification of one the fission fragment, was achieved. The present work describes the experimental approach, and discusses the pre-neutron observables in the context of an extended asymmetric-fission island located south-west of $^{208}Pb. A comparison with different models is performed, demonstrating the importance of this "new" asymmetric-fission island for elaborating on driving effects in fission.

Published
2022
Full Text
View/download PDF

22. Complete set of bound negative-parity states in the neutron-rich nucleus 18N

Author

S. Ziliani, M. Ciemała, F. C. L. Crespi, S. Leoni, B. Fornal, T. Suzuki, T. Otsuka, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M. N. Harakeh, Ł. W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S. M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D. R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Ziębliński, M. Zielińska, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Set (abstract data type), Physics, Particle physics, medicine.anatomical_structure, 010308 nuclear & particles physics, 0103 physical sciences, medicine, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, Parity (mathematics), 01 natural sciences, Nucleus
Abstract

International audience; High-resolution γ-ray spectroscopy of N18 is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an O18 beam on a Ta181 target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in N18 below the neutron threshold. Spin and parities are proposed for all located states on the basis of decay branchings and comparison with large-scale shell-model calculations performed in the p-sd space, with the YSOX interaction. Of particular interest is the location of the 01− and 12− excitations, which provide strong constrains for cross-shell p-sd matrix elements based on realistic interactions and help to simultaneously reproduce the ground and first-excited states in N16 and N18, for the first time. Understanding the N18 structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021

23. Lifetime measurements in the even-even Cd102–108 isotopes

Author

M. Siciliano, J. J. Valiente-Dobón, A. Goasduff, T. R. Rodríguez, D. Bazzacco, G. Benzoni, T. Braunroth, N. Cieplicka-Oryńczak, E. Clément, F. C. L. Crespi, G. de France, M. Doncel, S. Ertürk, C. Fransen, A. Gadea, G. Georgiev, A. Goldkuhle, U. Jakobsson, G. Jaworski, P. R. John, I. Kuti, A. Lemasson, H. Li, A. Lopez-Martens, T. Marchi, D. Mengoni, C. Michelagnoli, T. Mijatović, C. Müller-Gatermann, D. R. Napoli, J. Nyberg, M. Palacz, R. M. Pérez-Vidal, B. Sayği, D. Sohler, S. Szilner, and D. Testov

Subjects
Physics, Nuclear physics, Nuclear interaction, medicine.anatomical_structure, Isotope, 010308 nuclear & particles physics, Nuclear Theory, 0103 physical sciences, medicine, Nuclear Experiment, 010306 general physics, 01 natural sciences, Nucleus
Abstract

Background: The heaviest T-z = 0 doubly-magic nucleus, Sn-100, and the neighboring nuclei offer unique opportunities to investigate the properties of nuclear interaction. For instance, the structur ...

Published
2021

24. Evidence for enhanced neutron-proton correlations from the level structure of the N=Z+1 nucleus Tc444387

Author

X. Liu, B. Cederwall, C. Qi, R. A. Wyss, Ö. Aktas, A. Ertoprak, W. Zhang, E. Clément, G. de France, D. Ralet, A. Gadea, A. Goasduff, G. Jaworski, I. Kuti, B. M. Nyakó, J. Nyberg, M. Palacz, R. Wadsworth, J. J. Valiente-Dobón, H. Al-Azri, A. Ataç Nyberg, T. Bäck, G. de Angelis, M. Doncel, J. Dudouet, A. Gottardo, M. Jurado, J. Ljungvall, D. Mengoni, D. R. Napoli, C. M. Petrache, D. Sohler, J. Timár, D. Barrientos, P. Bednarczyk, G. Benzoni, B. Birkenbach, A. J. Boston, H. C. Boston, I. Burrows, L. Charles, M. Ciemala, F. C. L. Crespi, D. M. Cullen, P. Désesquelles, C. Domingo-Pardo, J. Eberth, N. Erduran, S. Ertürk, V. González, J. Goupil, H. Hess, T. Huyuk, A. Jungclaus, W. Korten, A. Lemasson, S. Leoni, A. Maj, R. Menegazzo, B. Million, R. M. Perez-Vidal, Zs. Podolyàk, A. Pullia, F. Recchia, P. Reiter, F. Saillant, M. D. Salsac, E. Sanchis, J. Simpson, O. Stezowski, C. Theisen, and M. Zielińska

Subjects
Physics, Proton, Spectrometer, 010308 nuclear & particles physics, Isoscalar, Nuclear Theory, 01 natural sciences, Charged particle, Excited state, 0103 physical sciences, Level structure, Neutron, AGATA, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

The low-lying excited states in the neutron-deficient $N = Z + 1$ nucleus $^{87}_{43}$Tc$_{44}$ have been studied via the fusion-evaporation reaction $^{54}$Fe $(^{36}Ar, 2n1p)$ $^{87}$Tc at the Grand Accelerateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt γ rays, neutrons, and charged particles emitted in the reaction. A level scheme of $^{87}$Tc from the $(9/2^+_{g.s})$ state to the $( 33 / 2^+_1$) state was established based on six mutually coincident γ -ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at $ℏω ≈ 0.50$ MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around $N=44$ is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the $N=Z$ line.

Published
2021

25. Dissonant Records : Close Listening to Literary Archives

Author

Tanya E. Clement and Tanya E. Clement

Subjects
Sound archives--Social aspects, Literature--Archival resources, Literature--Research, Intermediality, Listening--Social aspects
Abstract

How archives obscure recorded media—and the case in favor of discovering them.Silence is not absence. It may be perceived as meaningless, or it may not be perceived at all, but it takes up space. In Dissonant Records, Tanya Clement makes the case for spoken word audio recordings within the archives. She explains why we tend to not use these audio recordings in research, what silences exist in the cultural record, and what difference it makes when we start to listen. From recordings of the survivors of the 1921 Tulsa Massacre to Anne Sexton's recorded therapy sessions, Clement illustrates the myriad ways in which our current use of archives precludes the use of invaluable recorded texts.Whom, what, and how are we not studying in our cultural histories? Why, Clement asks, do audio recordings typically garner little interest? This book dissects the institutional and disciplinary blockades that discourage the use of spoken word audio recordings in research and teaching while interrogating how institutions and researchers can be selectively biased in favor of print and against the seemingly more ephemeral, time-based objects of our archives. History-making is a messy, sociotechnical process, the author explains, and our understanding of culture can only be made better when we listen more closely to the noise.

Published
2024

26. Lifetime measurements in the even-even Cd 102 – 108 isotopes

Author

M. Siciliano, J. J. Valiente-Dobón, A. Goasduff, T. R. Rodríguez, D. Bazzacco, G. Benzoni, T. Braunroth, N. Cieplicka-Oryńczak, E. Clément, F. C. L. Crespi, G. de France, M. Doncel, S. Ertürk, C. Fransen, A. Gadea, G. Georgiev, A. Goldkuhle, U. Jakobsson, G. Jaworski, P. R. John, I. Kuti, A. Lemasson, H. Li, A. Lopez-Martens, T. Marchi, D. Mengoni, C. Michelagnoli, T. Mijatović, C. Müller-G

Published
2021
Full Text
View/download PDF

27. Coulomb and nuclear excitations of Zn 70 and Ni 68 at intermediate energy

Author

S. Calinescu, O. Sorlin, I. Matea, F. Carstoiu, D. D. Dao, F. Nowacki, G. de Angelis, R. Astabatyan, S. Bagchi, C. Borcea, R. Borcea, L. Cáceres, M. Ciemála, E. Clément, Z. Dombrádi, S. Franchoo, A. Gottardo, S. Grévy, H. Guerin, M. N. Harakeh, I. M. Harca, O. Kamalou, M. Kmiecik, A. Krasznahorkay, M. Krzysiek, I. Kuti, A. Lepailleur, S. Lukyanov, A. Maj, V. Maslov, K. Mazurek, P. Morfouace

Published
2021
Full Text
View/download PDF

28. Pseudo spin doublet bands and Gallagher Moszkowski doublet bands in $^{100}$Y

Author

E. H. Wang, J. H. Hamilton, A. V. Ramayya, C. J. Zachary, A. Lemasson, A. Navin, M. Rejmund, S. Bhattacharyya, Q. B. Chen, S. Q. Zhang, J. M. Eldridge, J. K. Hwang, N. T. Brewer, Y. X. Luo, J. O. Rasmussen, S. J. Zhu, G. M. Ter-Akopian, Yu. Ts. Oganessian, M. Caamaño, E. Clément, O. Delaune, F. Farget, G. de France, B. Jacquot, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Spin states, Spectrometer, Nuclear Theory, Pseudo Spin, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Fission, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure, Coincidence, Nuclear Theory (nucl-th), 100Y, Gammasphere, Covariant transformation, Atomic physics, Nuclear Experiment (nucl-ex), Electronic band structure, Nuclear Experiment, GM Partner, Spontaneous fission
Abstract

New transitions in neutron rich $^{100}$Y have been identified in a $^9$Be+$^{238}$U experiment with mass- and Z- gates to provide full fragment identification. These transitions and high spin levels of $^{100}$Y have been investigated by analyzing the high statistics $\gamma$-$\gamma$-$\gamma$ and $\gamma$-$\gamma$-$\gamma$-$\gamma$ coincidence data from the spontaneous fission of $^{252}$Cf at the Gammasphere detector array. Two new bands, 14 new levels and 23 new transitions have been identified. The $K^{\pi}=4^+$ new band decaying to an 1s isomeric state is assigned to be the high-$K$ Gallagher-Moszkowski (GM) partner of the known $K^{\pi}=1^+$ band, with the $\pi 5/2[522] \otimes \nu 3/2[411]$ configuration. This 4$^+$ band is also proposed to be the pseudo spin partner of the new $K^{\pi}=5^+$ band with a 5$^{+}$ $\pi 5/2[422] \otimes \nu 5/2[413]$ configuration, to form a $\pi 5/2[422] \otimes \nu [312$ $5/2,3/2]$ neutron pseudospin doublet. Constrained triaxial covariant density functional theory and quantal particle rotor model calculations have been applied to interpret the band structure and available electromagnetic transition probabilities and are found in good agreement with experimental values.

Published
2021
Full Text
View/download PDF

29. Artificial neural networks for neutron/ γ discrimination in the neutron detectors of NEDA

Author

X. Fabian, G. Baulieu, L. Ducroux, O. Stézowski, A. Boujrad, E. Clément, S. Coudert, G. de France, N. Erduran, S. Ertürk, V. González, G. Jaworski, J. Nyberg, D. Ralet, E. Sanchis, R. Wadsworth, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, [formula omitted]-ray spectroscopy, Neutron detector, Computer Science::Neural and Evolutionary Computation, γ -ray spectroscopy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Coincident, 0103 physical sciences, Machine learning, Neutron detection, Waveform, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation, ComputingMilieux_MISCELLANEOUS, Physics, Artificial neural network, Artificial neural networks, Pulse-shape discrimination, n- γ discrimination, 010308 nuclear & particles physics, business.industry, Pattern recognition, Data set, n-[formula omitted] discrimination, Feature (computer vision), n-? discrimination, AGATA, Artificial intelligence, y-ray spectroscopy, business
Abstract

Three different Artificial Neural Network architectures have been applied to perform neutron/? discrimination in NEDA based on waveform and time-of-flight information. Using the coincident ?-rays from AGATA, we have been able to measure and compare on real data the performances of the Artificial Neural Networks as classifiers. While the general performances are quite similar for the data set we used, differences, in particular related to the computing times, have been highlighted. One of the Artificial Neural Network architecture has also been found more robust to time misalignment of the waveforms. Such a feature is of great interest for online processing of waveforms. Narodowe Centrum Nauki: 2017/25/B/ST2/01569 Narodowym Centrum Nauki One of the author acknowledges support of the National Science Centre, Poland (NCN) (grant no. 2017/25/B/ST2/01569 ).

Published
2021

31. High-spin states above the isomers in neutron-rich iodine nuclei near N=82

Author

R. Banik, S. Bhattacharyya, M. Rejmund, A. Lemasson, S. Biswas, A. Navin, Y. H. Kim, C. Michelagnoli, I. Stefan, P. Bednarczyk, Soumik Bhattacharya, E. Clément, H. L. Crawford, G. de France, P. Fallon, G. Frémont, J. Goupil, B. Jacquot, H. J. Li, J. Ljungvall, A. Maj, L. Ménager, V. Morel, G. Mukherjee, R. Palit, R. M. Pérez-Vidal, J. Ropert, C. Schmitt, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Spin states, Isotope, 010308 nuclear & particles physics, Fission, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Excited state, 0103 physical sciences, Neutron, AGATA, Atomic physics, 010306 general physics, Spin (physics), Spectroscopy, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Excited states of neutron rich Iodine isotopes 130−134 I above the high spin isomers have been identified using prompt-delayed γ-ray spectroscopy. The Iodine isotopes have been produced as fission fragments of fusion-fission and transfer induced fission of 9 Be(238 U, f) at a beam energy of 6.2 MeV/u. The complete (A, Z) identification was obtained using the large acceptance magnetic spectrometer VAMOS++. The AGATA γ-ray tracking array was used to detect the prompt γ rays while the delayed γ rays (in the time range of 100 ns to 200 µs) from the isomeric states were identified by the EXOGAM segmented Clover detectors, placed behind the focal plane of VAMOS++ spectrometer. The high spin states above the (8 −) isomers in 130,132 I have been populated for the first time and a new isomer in 132 I has been identified. New γ-ray transition has also been assigned to the level structure of 134 I. Prompt transitions above the 19/2 − isomer have been identified in 131,133 I, for the first time. The level structures are interpreted in terms of the systematics of odd-Z nuclei above Z = 50 shell closure and large scale shell model calculations.

Published
2020

32. Prompt-delayed γ -ray spectroscopy of neutron-rich In119,121 isotopes

Author

S. Biswas, A. Lemasson, M. Rejmund, A. Navin, Y. H. Kim, C. Michelagnoli, I. Stefan, R. Banik, P. Bednarczyk, Soumik Bhattacharya, S. Bhattacharyya, E. Clément, H. L. Crawford, G. de France, P. Fallon, G. Frémont, J. Goupil, B. Jacquot, H. J. Li, J. Ljungvall, A. Maj, L. Ménager, V. Morel, R. Palit, R. M. Pérez-Vidal, and J. Ropert

Subjects
Physics, Isotope, 010308 nuclear & particles physics, Fission, Nuclear structure, 01 natural sciences, Atomic orbital, Neutron number, 0103 physical sciences, Neutron, AGATA, Atomic physics, 010306 general physics, Spectroscopy
Abstract

Author(s): Biswas, S; Lemasson, A; Rejmund, M; Navin, A; Kim, YH; Michelagnoli, C; Stefan, I; Banik, R; Bednarczyk, P; Bhattacharya, S; Bhattacharyya, S; Clement, E; Crawford, HL; De France, G; Fallon, P; Fremont, G; Goupil, J; Jacquot, B; Li, HJ; Ljungvall, J; Maj, A; Menager, L; Morel, V; Palit, R; Perez-Vidal, RM; Ropert, J | Abstract: Background: The Z=50 shell closure, near N=82, is unique in the sense that it is the only shell closure with the spin-orbit partner orbitals, πg9/2 and πg7/2, enclosing the magic gap. The interaction of the proton hole/particle in the above-mentioned orbitals with neutrons in the νh11/2 orbital is an important prerequisite to the understanding of the nuclear structure near N=82 and the νπ interaction. Purpose: To explore the structural similarity between the high-spin isomeric states in In (Z=49), Sn (Z=50), and Sb (Z=51) isotopes from a microscopic point of view. In addition, to understand the role of a proton hole or particle in the spin-orbit partner orbitals, πg9/2 and πg7/2, respectively, with neutron holes in the νh11/2 orbital on these aforementioned isomers. Methods: The fusion and transfer induced fission reaction Be9(U238, f) with 6.2 MeV/u beam energy, using a unique setup consisting of AGATA, VAMOS++, and EXOGAM detectors, was used to populate through the fission process and study the neutron-rich In119,121 isotopes. This setup enabled the prompt-delayed γ-ray spectroscopy of isotopes in the time range of 100ns-200μs. Results: In the odd-AIn119,121 isotopes, indications of a short half-life 19/2- isomeric state, in addition to the previously known 25/2+ isomeric state, were observed from the present data. Further, new prompt transitions above the 25/2+ isomer in In121 were identified along with reevaluation of its half-life. Conclusions: The experimental data were compared with the theoretical results obtained in the framework of large-scale shell-model calculations in a restricted model space. The (πg9/2νh11/2;I|Ĥ|πg9/2νh11/2;I) two-body matrix elements of residual interaction were modified to explain the excitation energies and the B(E2) transition probabilities in the neutron-rich In isotopes. The (i) decreasing trend of E(29/2+)-E(25/2+) in odd-In (with dominant configuration πg9/2-1νh11/2-2 and maximum aligned spin of 29/2+) and (ii) increasing trend of E(27/2+)-E(23/2+) in odd-Sb (with dominant configuration πg7/2+1νh11/2-2 and maximum aligned spin of 27/2+) with increasing neutron number could be understood as a consequence of hole-hole and particle-hole interactions, respectively.

Published
2020

33. Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2+ state in C16 and O20

Author

M. Ciemała, S. Ziliani, F. C. L. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M. N. Harakeh, Ł. W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S. M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D. R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Zieblinski, M. Zielińska, A. Ataç, D. Barrientos, B. Birkenbach, A. J. Boston, B. Cederwall, L. Charles, J. Collado, D. M. Cullen, P. Désesquelles, C. Domingo-Pardo, J. Dudouet, J. Eberth, V. González, J. Goupil, L. J. Harkness-Brennan, H. Hess, D. S. Judson, A. Jungclaus, W. Korten, M. Labiche, A. Lefevre, R. Menegazzo, D. Mengoni, J. Nyberg, R. M. Perez-Vidal, Zs. Podolyak, A. Pullia, F. Recchia, P. Reiter, F. Saillant, M. D. Salsac, E. Sanchis, O. Stezowski, Ch. Theisen, J. J. Valiente-Dobón, J. D. Holt, J. Menéndez, A. Schwenk, and J. Simonis

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, Nuclear structure, Ab initio, Neutron, State (functional analysis), Atomic physics, 010306 general physics, 7. Clean energy, 01 natural sciences, Nuclear theory
Abstract

To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2(+) state in neutron-rich O-20, tau(2(2)(+)) = 150(-30)(+80) fs, and an estimate for the lifetime of ...

Published
2020

34. Lifetime measurements of excited states in neutron-rich Ti 53 : Benchmarking effective shell-model interactions

Author

A. Goldkuhle, A. Blazhev, C. Fransen, A. Dewald, M. Beckers, B. Birkenbach, T. Braunroth, E. Clément, J. Dudouet, J. Eberth, H. Hess, B. Jacquot, J. Jolie, Y.-H. Kim, A. Lemasson, S. M. Lenzi, H. J. Li, J. Litzinger, C. Michelagnoli, C. Müller-Gatermann, B. S. Nara Singh, R. M. Pérez-Vidal, D. Ralet, P. Reiter, A. Vogt, N. Warr, K. O. Zell

Published
2020
Full Text
View/download PDF

35. [Postoperative complications and long-term outcomes of transplantation with expended criteria donors transplants]

Author

M, Fellmann, L, Balssa, E, Clément, P, Frey, A, Frontczak, S, Bernardini, É, Chabannes, G, Guichard, H, Bittard, and F, Kleinclauss

Subjects
Postoperative Complications, Treatment Outcome, Graft Survival, Humans, Tissue Donors, Donor Selection, Retrospective Studies
Abstract

The objective of this study was to analyze early, late complications and outcomes following expended criteria donors (ECD) kidney transplantation compared to standard donors.We performed a retrospective study including 470 patients who received a kidney transplant between 2005 and 2016. Expended criteria donors were defined following the United Network of Organ Sharing criteria. In each group, length of stay, delayed graft function, surgical site infection, acute rejection, surgical complications by type and according to Clavien and Dindo classification were analyzed in univariate and multivariate analysis. The impact of ECD transplant on transplant and patient survival was assessed using a Cox proportional regression model.One hundred and ninety seven (41.9%) patients received ECD kidney. The mean follow-up was 61,4 months (22.4-93.89). Patients with ECD transplant presented more delayed graft function (HR=2.1 (1.1-3.68), P=0.008) but the rate of complications including surgical complications was not different. Patients and transplant survival were decreased in ECD transplant group (P=0.005 et 0.001 respectively). In multivariate analysis ECD kidney was an independent factor only associated with decreased transplant survival (HR=1.81 (1.1-2.98), P=0.029) but not with patient survival.ECD kidney transplantation was not associated with increased postoperative complications but a higher rate of delayed graft function. Nevertheless, it was associated with a decreased transplant survival. The use of pulsatile perfusion machine for explanted criteria transplant should be evaluated to improve these results.

Published
2019

36. Lifetime Measurements of Low-lying States in $^{73}$Ga and $^{70,72,74}$Zn Isotopes

Author

T. Milanović, I. Čeliković, C. Michelagnoli, G. de France, A. Boso, T. Braunroth, E. Clément, A. Dewald, G. Georgiev, E. Ideguchi, B. Jacquot, W. Królas, D. Napoli, N. Lalović, K.Y. Lee, A. Lemasson, H. Li, J. Ljungvall, A. Navin, A. Nori, R. Perez-Vidal, M. Rejmund, P. Ujić, D. Wilmsen, Y. Yamamoto, M. Zielińska, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and ILL

Subjects
Physics, symbols.namesake, Recoil, Isotope, Spectrometer, symbols, General Physics and Astronomy, AGATA, Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Tracking (particle physics), Doppler effect, Beam (structure)
Abstract

International audience; Lifetimes of low-lying states in 73Ga and 70,72,74Zn were measured using the Recoil Distance Doppler Shift (RDDS) method. These nuclei were produced in deep-inelastic reactions in inverse kinematics with a 208Pb beam impinging on a 76Ge target. Prompt γ rays were detected using the AGATA tracking array coupled to the VAMOS++ spectrometer. Lifetime of the 5/2 − state in 73Ga, measured for the first time, provides additional evidence for the existence of a 1/2 −, 3/2 − ground-state doublet. The lifetimes of the 4 + states in 70,72,74Zn were remeasured in an attempt to understand the discrepancies observed between earlier measurements. Our results are in agreement with those of previous plunger experiments.

Published
2019

37. Excitations of the magic N=50 neutron-core revealed in Ga81

Author

J. Dudouet, A. Lemasson, G. Maquart, F. Nowacki, D. Verney, M. Rejmund, G. Duchêne, O. Stezowski, E. Clément, C. Michelagnoli, A. Korichi, C. Andreoiu, A. Astier, G. de Angelis, G. de France, C. Delafosse, I. Deloncle, F. Didierjean, Z. Dombradi, C. Ducoin, A. Gadea, A. Gottardo, D. Guinet, B. Jacquot, P. Jones, T. Konstantinopoulos, I. Kuti, F. Le Blanc, S. M. Lenzi, G. Li, R. Lozeva, B. Million, D. R. Napoli, A. Navin, R. M. Pérez-Vidal, C. M. Petrache, D. Ralet, M. Ramdhane, N. Redon, C. Schmitt, and D. Sohler

Subjects
Physics, Valence (chemistry), 010308 nuclear & particles physics, Fission, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, 01 natural sciences, Ion, 0103 physical sciences, Physics::Atomic and Molecular Clusters, AGATA, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Spectroscopy, Excitation
Abstract

The high-spin states of the neutron-rich Ga81, with three valence protons outside a Ni78 core, were measured. The measurement involved prompt γ-ray spectroscopy of fission fragments isotopically identified using the combination of the variable mode spectrometer (VAMOS++) and the advanced gamma tracking array (AGATA). The new γ-ray transitions, observed in coincidence with Ga81 ions, and the corresponding level scheme do not confirm the high-spin levels reported earlier. The newly observed high-spin states in Ga81 are interpreted using the results of state-of-the-art large-scale shell model (LSSM) calculations. The lower excitation energy levels are understood as resulting from the recoupling of three valence protons to the closed doubly magic core, while the highest excitation energy levels correspond to excitations of the magic N=50 neutron core. These results support the doubly magic character of Ni78 and the persistence of the N=50 shell closure but also highlight the presence of strong proton-neutron correlations associated with the promotion of neutrons across the magic N=50 shell gap, only few nucleons away from Ni78.

Published
2019

38. Lifetime measurements in Ti 52 , 54 to study shell evolution toward N = 32

Author

A. Goldkuhle, C. Fransen, A. Blazhev, M. Beckers, B. Birkenbach, T. Braunroth, E. Clément, A. Dewald, J. Dudouet, J. Eberth, H. Hess, B. Jacquot, J. Jolie, Y.-H. Kim, A. Lemasson, S. M. Lenzi, H. J. Li, J. Litzinger, C. Michelagnoli, C. Müller-Gatermann, B. S. Nara Singh, R. M. Pérez-Vidal, D. Ralet, P. Reiter, A. Vogt, N. Warr, K. O. Zell, A. Ataç, D. Barrientos, C. Barthe-Dejean, G. Benzoni

Published
2019
Full Text
View/download PDF

39. Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of Hg-182, Hg-184, Hg-186 and Hg-188

Author

K Rezynkina, P. Marley, J. E. García-Ramos, Jan Diriken, N. Kesteloot, P. Reiter, L. M. Fraile, Mark Huyse, Kristiaan Heyde, R. D. Page, O. Ivanov, R. Gernhäuser, R. Krücken, Th. Kröll, A. C. Larsen, E. Rapisarda, Tuomas Grahn, Alick Deacon, N. Warr, A. Petts, AP Robinson, S. J. Freeman, P. J. Napiorkowski, P. Van Duppen, R-D Herzberg, Thomas Elias Cocolios, B. Bruyneel, Gry Merete Tveten, R. Orlandi, E. Piselli, Ch. Fransen, B. Bastin, Marcus Scheck, Conor Fitzpatrick, D. Voulot, Rauno Julin, Baharak Hadinia, L. Próchniak, J. Srebrny, Magne Guttormsen, Sunniva Siem, Liam Gaffney, J. L. Wood, H. Hess, Panu Rahkila, J. Van de Walle, P. A. Butler, J. F. Smith, K Singh Chakkal, D. G. Jenkins, Michaël Bender, Andreas Wiens, Andrei Andreyev, M. P. Carpenter, M. Hass, Pauli Peura, K Hadyńska-Klȩk, Janne Pakarinen, R. Lutter, Andreas Ekström, I. Stefanescu, P.-H. Heenen, Joakim Cederkäll, K. Geibel, A. Blazhev, M. Zielinska, K. Wrzosek-Lipska, E. Clément, N. Bree, N. Patronis, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Helsinki Institute of Physics

Subjects
Moments, Intruder, 01 natural sciences, MOMENTS, Nuclear Experiment, Physics, education.field_of_study, Yrast, Bohr model, LIFETIMES, ddc, Mean field theory, symbols, Física nuclear, Atomic physics, ydinfysiikka, Configuration, Nuclear and High Energy Physics, ELECTRIC-MONOPOLE TRANSITIONS, Population, Electric-monopole transitions, DEFORMED BANDS, Lifetimes, Coulomb excitation, NUCLEAR, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 114 Physical sciences, symbols.namesake, Isomerism, SHAPE COEXISTENCE, 0103 physical sciences, Nuclear fusion, Nuclear Physics - Experiment, Neutron, Nuclear, 010306 general physics, education, CONFIGURATION, Deformed bands, 010308 nuclear & particles physics, INTRUDER, Shape coexistence, 2207 Física Atómica y Nuclear, Decay, Physics and Astronomy, 13. Climate action, ISOMERISM, Interacting boson model, DECAY
Abstract

The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass 182-188 Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. The population of $ 0^{+}_{1,2}$01,2+, $ 2^{+}_{1,2}$21,2+and $ 4^{+}_{1}$41+states was observed in all nuclei under study. Reduced E2 matrix elements coupling populated yrast and non-yrast states were extracted, including their relative signs. These are a sensitive probe of shape coexistence and may be used to validate nuclear models. The experimental results are discussed in terms of mixing of two different configurations and are compared with three different model calculations: the Beyond Mean Field model, the Interacting Boson Model with configuration mixing and the General Bohr Hamiltonian. Partial agreement with experiment was observed, hinting to missing ingredients in the theoretical descriptions. The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass 182-188 Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. The population of $ 0^{+}_{1,2}$01,2+, $ 2^{+}_{1,2}$21,2+and $ 4^{+}_{1}$41+states was observed in all nuclei under study. Reduced E2 matrix elements coupling populated yrast and non-yrast states were extracted, including their relative signs. These are a sensitive probe of shape coexistence and may be used to validate nuclear models. The experimental results are discussed in terms of mixing of two different configurations and are compared with three different model calculations: the Beyond Mean Field model, the Interacting Boson Model with configuration mixing and the General Bohr Hamiltonian. Partial agreement with experiment was observed, hinting to missing ingredients in the theoretical descriptions. ispartof: The European Physical Journal A - Hadrons and Nuclei vol:55 issue:8 pages:130-130 status: published

Published
2019

40. Excitations of the magic N = 50 neutron-core revealed in Ga 81

Author

J. Dudouet, A. Lemasson, G. Maquart, F. Nowacki, D. Verney, M. Rejmund, G. Duchêne, O. Stezowski, E. Clément, C. Michelagnoli, A. Korichi, C. Andreoiu, A. Astier, G. de Angelis, G. de France, C. Delafosse, I. Deloncle, F. Didierjean, Z. Dombradi, C. Ducoin, A. Gadea, A. Gottardo, D. Guinet, B. Jacquot, P. Jones, T. Konstantinopoulos, I. Kuti, F. Le Blanc, S. M. Lenzi, G. Li, R. Lozeva, B. Millio

Published
2019
Full Text
View/download PDF

41. SPECTROSCOPY OF NEUTRON-RICH C, O, N AND F ISOTOPES WITH THE AGATA plus PARIS plus VAMOS SETUP AT GANIL

Author

S. Ziliani, M. Ciemała, F. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, O. Dorvaux, S. Erturk, G. De France, A. Goldkuhle, J. Grębosz, M.N. Harakeh, Ł.W. Iskra, B. Jacquot, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, B. Million, C. Müller-Gatermann, P. Napiorkowski, V. Nanal, M. Matejska-Minda, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, B. Wasilewska, M. Ziębliński, Fornal, Bogdan -- 0000-0002-1142-8067, Ciemala, Michal -- 0000-0001-5328-720X, [Ziliani, S. -- Crespi, F. -- Leoni, S. -- Bracco, A. -- Bottoni, S. -- Camera, F.] Univ Milan, Milan, Italy -- [Ziliani, S. -- Crespi, F. -- Leoni, S. -- Benzoni, G. -- Bracco, A. -- Boiano, C. -- Bottoni, S. -- Brambilla, S. -- Camera, F. -- Million, B.] INFN, Sez Milano, Milan, Italy -- [Ciemala, M. -- Fornal, B. -- Maj, A. -- Bednarczyk, P. -- Cieplicka-Orynczak, N. -- Grebosz, J. -- Iskra, L. W. -- Kmiecik, M. -- Mazurek, K. -- Wasilewska, B.] Polish Acad Sci, Inst Nucl Phys, Krakow, Poland -- [Bast, M. -- Beckers, M. -- Braunroth, T. -- Goldkuhle, A. -- Mueller-Gatermann, C.] IKP Cologne, Cologne, Germany -- [Clement, E. -- De France, G. -- Jacquot, B. -- Kim, Y. -- Lemasson, A. -- Li, H. -- Rejmund, M.] CEA, DSAM, GANIL, Caen, France -- [Clement, E. -- De France, G. -- Jacquot, B. -- Kim, Y. -- Lemasson, A. -- Li, H. -- Rejmund, M.] CNRS, IN2P3, Caen, France -- [Dorvaux, O. -- Schmitt, Ch] CNRS, IN2P3, IPHC UMR 7178, Strasbourg, France -- [Erturk, S.] Nigde Univ, Nigde, Turkey -- [Harakeh, M. N.] KVI Ctr Adv Radiat Technol, Groningen, Netherlands -- [Kicinska-Habior, M. -- Matea, I -- Stefan, I] Warsaw Univ, Fac Phys, Warsaw, Poland -- [Kicinska-Habior, M. -- Matea, I -- Stefan, I] IPN, Orsay Lab, Orsay, France -- [Michelagnoli, C.] ILL Grenoble, Grenoble, France -- [Napiorkowski, P. -- Matejska-Minda, M.] Univ Warsaw, Heavy Ion Lab, Warsaw, Poland -- [Nanal, V] Dept Nucl & Atom Phys, Mumbai, Maharashtra, India -- [Stanoiu, M.] IFIN HH, Bucharest, Romania -- [Zieblinski, M.] CEA, DRF, IRFU, Ctr CEA Saclay, Saclay, France, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Laue-Langevin (ILL), ILL, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 0-Belirlenecek, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Isotope, Spectrometer, 010308 nuclear & particles physics, General Physics and Astronomy, Context (language use), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, 0-Belirlenecek, Nuclear physics, Nuclear interaction, Ab initio quantum chemistry methods, 0103 physical sciences, Neutron, AGATA, Spectroscopy, Nuclear Experiment
Abstract

Zakopane Conference on Nuclear Physics - Extremes of the Nuclear Landscape -- AUG 26-SEP 02, 2018 -- Zakopane, POLAND, WOS: 000463866500052, Recent ab initio calculations pointed out the importance of the three-body terms of the nuclear interaction, in the description of the structure of n-rich systems. The state lifetimes in light n-rich carbon and oxygen nuclei have been predicted to be sensitive to the three-body terms and, in this context, an experiment, aiming at the measurement of these lifetimes, was performed in GANIL in July 2017 with the AGATA and PARIS arrays coupled to the VAMOS++ magnetic spectrometer. Details on the AGATA preliminary data analysis are presented., National Science Centre, Poland (NCN) [2013/08/M/ST2/00257, 2014/14/M/ST2/00738, 2016/22/M/ST2/00269], This work was supported by the National Science Centre, Poland (NCN) under contracts No. 2013/08/M/ST2/00257, 2014/14/M/ST2/00738 and 2016/22/M/ST2/00269.

Published
2019

42. Pseudospin Symmetry and Microscopic Origin of Shape Coexistence in the Ni78 Region: A Hint from Lifetime Measurements

Author

C. Delafosse, D. Verney, P. Marević, A. Gottardo, C. Michelagnoli, A. Lemasson, A. Goasduff, J. Ljungvall, E. Clément, A. Korichi, G. De Angelis, C. Andreoiu, M. Babo, A. Boso, F. Didierjean, J. Dudouet, S. Franchoo, A. Gadea, G. Georgiev, F. Ibrahim, B. Jacquot, T. Konstantinopoulos, S. M. Lenzi, G. Maquart, I. Matea, D. Mengoni, D. R. Napoli, T. Nikšić, L. Olivier, R. M. Pérez-Vidal, C. Portail, F. Recchia, N. Redon, M. Siciliano, I. Stefan, O. Stezowski, D. Vretenar, M. Zielinska, D. Barrientos, G. Benzoni, B. Birkenbach, A. J. Boston, H. C. Boston, B. Cederwall, L. Charles, M. Ciemala, J. Collado, D. M. Cullen, P. Désesquelles, G. de France, C. Domingo-Pardo, J. Eberth, V. González, L. J. Harkness-Brennan, H. Hess, D. S. Judson, A. Jungclaus, W. Korten, A. Lefevre, F. Legruel, R. Menegazzo, B. Million, J. Nyberg, B. Quintana, D. Ralet, P. Reiter, F. Saillant, E. Sanchis, Ch. Theisen, and J. J. Valiente Dobon

Subjects
Physics, Valence (chemistry), Proton, 010308 nuclear & particles physics, General Physics and Astronomy, 01 natural sciences, Particle identification, Recoil, Excited state, 0103 physical sciences, Quadrupole, Neutron, AGATA, Atomic physics, 010306 general physics
Abstract

Lifetime measurements of excited states of the light N = 52 isotones 88 Kr , 86 Se , and 84 Ge have been performed, using the recoil distance Doppler shift method and VAMOS and AGATA spectrometers for particle identification and gamma spectroscopy, respectively. The reduced electric quadrupole transition probabilities B ( E 2 ; 2 + → 0 + ) and B ( E 2 ; 4 + → 2 + ) were obtained for the first time for the hard-to-reach 84 Ge . While the B ( E 2 ; 2 + → 0 + ) values of 88 Kr , 86 Se saturate the maximum quadrupole collectivity offered by the natural valence ( 3 s , 2 d , 1 g 7 / 2 , 1 h 11 / 2 ) space of an inert 78 Ni core, the value obtained for 84 Ge largely exceeds it, suggesting that shape coexistence phenomena, previously reported at N ≲ 49 , extend beyond N = 50 . The onset of collectivity at Z = 32 is understood as due to a pseudo-SU(3) organization of the proton single-particle sequence reflecting a clear manifestation of pseudospin symmetry. It is realized that the latter provides actually reliable guidance for understanding the observed proton and neutron single particle structure in the whole medium-mass region, from Ni to Sn, pointing towards the important role of the isovector-vector ρ field in shell-structure evolution.

Published
2018

43. Determination of Lifetimes of Excited States in Neutron-rich $^{20}$O Isotope from Experiment with the AGATA+PARIS+VAMOS Setup

Author

M. Ciemała, S. Ziliani, F. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, O. Dorvaux, S. Ertürk, G. De France, A. Goldkuhle, J. Grębosz, M.N. Harakeh, Ł.W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, B. Millon, C. Müller-Gatermann, P. Napiorkowski, V. Nanal, M. Matejska-Minda, M. Rejmund, B. Sowicki, Ch. Schmitt, M. Stanoiu, I. Stefan, B. Wasilewska, M. Zielińska, M. Ziębliński, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Laue-Langevin (ILL), ILL, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Isotope, 010308 nuclear & particles physics, Nuclear Theory, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Excited state, 0103 physical sciences, AGATA, Neutron, Nuclear Experiment
Abstract

International audience; An experiment aiming at measuring lifetimes of the second 2+ excited states in neutron-rich C and O isotopes was recently performed at the GANIL laboratory, in France. In these nuclei, recent ab initio calculations provide a detailed description of the nuclear excited states, predicting a strong sensitivity of the electromagnetic transition probabilities to the details of the nucleon–nucleon interactions, especially in connection with the role played by the three-body (NNN) forces. Thus, the measurement of 2 + states lifetimes in this region will be a stringent test of the importance of including the NNN forces in describing the electromagnetic properties of selected nuclear states. This contribution reports on the status of the experimental analysis for the case of lifetimes in 20O.

Published
2018

44. The New Neutron Multiplicity Filter NEDA and Its First Physics Campaign with AGATA

Author

G. Jaworski, A. Goasduff, F.J. Egea Canet, V. Modamio, T. Hüyük, A. Triossi, M. Jastrząb, P.-A. Söderström, S.M. Carturan, A. Di Nitto, G. de Angelis, G. De France, N. Erduran, A. Gadea, M. Moszyński, J. Nyberg, M. Palacz, J. Valiente, R. Wadsworth, R. Aliaga, C. Aufranc, M. Bézard, G. Beaulieu, P. Bednarczyk, E. Bisiato, A. Boujrad, I. Burrows, E. Clément, P. Cocconi, G. Colucci, D. Conventi, M. Cordwell, S. Coudert, J.M. Deltoro, L. Ducroux, T. Dupasquier, S. Ertürk, X. Fabian, V. González, A. Gottardo, A. Grant, K. Hadyńska-Klęk, A. Illana, M.L. Jurado-Gomez, M. Kogimtzis, I. Lazarus, L. Legeard, J. Ljungvall, A. Maj, G. Pasqualato, R.M. Pérez-Vidal, A. Raggio, D. Ralet, N. Redon, F. Saillant, E. Sanchis, B. Sayğı, M. Scarcioffolo, M. Siciliano, O. Stezowski, D. Testov, M. Tripon, I. Zanon, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ege Üniversitesi, Jaworski, G., Goasduff, A., Egea Canet, F. J., Modamio, V., Hüyük, T., Triossi, A., Jastrząb, M., Söderström, P. -A., Carturan, S. M., Di Nitto, A., De Angelis, G., De France, G., Erduran, N., Gadea, A., Moszyński, M., Nyberg, J., Palacz, M., Valiente, J., Wadsworth, R., Aliaga, R., Aufranc, C., Bézard, M., Beaulieu, G., Bednarczyk, P., Bisiato, E., Boujrad, A., Burrows, I., Clément, E., Cocconi, P., Colucci, G., Conventi, D., Cordwell, M., Coudert, S., Deltoro, J. M., Ducroux, L., Dupasquier, T., Ertürk, S., Fabian, X., González, V., Gottardo, A., Grant, A., Hadyńska-Klęk, K., Illana, A., Jurado-Gomez, M. L., Kogimtzis, M., Lazarus, I., Legeard, L., Ljungvall, J., Maj, A., Pasqualato, G., Pérez-Vidal, R. M., Raggio, A., Ralet, D., Redon, N., Saillant, F., Sanchis, E., Sayğı, B., Scarcioffolo, M., Siciliano, M., Stezowski, O., Testov, D., Tripon, M., Zanon, I., Jaworski, G., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy, Heavy Ion Laboratory, University of Warsaw, Warszawa, Poland -- Goasduff, A., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy, Department of Physics and Astronomy, University of Padua, Padua, Italy, INFN, Division of Padua, Padua, Italy -- Egea Canet, F.J., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy, Department of Physics and Astronomy, University of Padua, Padua, Italy, INFN, Division of Padua, Padua, Italy, IFIC, CSIC University of Valencia, Paterna, Spain -- Modamio, V., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy, Department of Physics, University of Oslo, Oslo, Norway -- Hüyük, T., IFIC, CSIC University of Valencia, Paterna, Spain -- Triossi, A., Department of Physics and Astronomy, University of Padua, Padua, Italy, INFN, Division of Padua, Padua, Italy, CERN, Switzerland -- Jastrzab, M., Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland -- Söderström, P.-A., Extreme Light Infrastructure–Nucl. Phys. (ELI–NP), Bucharest, Romania -- Carturan, S.M., Department of Physics and Astronomy, University of Padua, Padua, Italy, INFN, Division of Padua, Padua, Italy -- Di Nitto, A., Helmholtz Institute Mainz and GSI, Darmstadt, Germany -- De Angelis, G., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- De France, G., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Erduran, N., Fac. of Eng. and Natural Sciences, Istanbul Zaim University, Istanbul, Turkey -- Gadea, A., IFIC, CSIC University of Valencia, Paterna, Spain -- Moszynski, M., National Centre for Nuclear Research, Otwock-Swierk, Poland -- Nyberg, J., Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden -- Palacz, M., Heavy Ion Laboratory, University of Warsaw, Warszawa, Poland -- Valiente, J., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Wadsworth, R., Department of Physics, University of York, Heslington, York, United Kingdom -- Aliaga, R., IFIC, CSIC University of Valencia, Paterna, Spain -- Aufranc, C., University of Lyon, CNRS, IN2P3, IPN Lyon, Villeurbanne, France -- Bézard, M., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Beaulieu, G., University of Lyon, CNRS, IN2P3, IPN Lyon, Villeurbanne, France -- Bednarczyk, P., Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland -- Bisiato, E., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Boujrad, A., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Burrows, I. -- Clément, E., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Cocconi, P., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Colucci, G., Department of Physics and Astronomy, University of Padua, Padua, Italy, INFN, Division of Padua, Padua, Italy -- Conventi, D., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Cordwell, M. -- Coudert, S., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Deltoro, J.M., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Ducroux, L., University of Lyon, CNRS, IN2P3, IPN Lyon, Villeurbanne, France -- Dupasquier, T., University of Lyon, CNRS, IN2P3, IPN Lyon, Villeurbanne, France -- Ertürk, S., Department of Physics, Nigde Omer Halisdemir University, Nigde, Turkey -- Fabian, X., University of Lyon, CNRS, IN2P3, IPN Lyon, Villeurbanne, France -- González, V., Department of Electric Engineering, University of Valencia, Burjassot, Spain -- Gottardo, A., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Grant, A. -- Hadynska-Klek, K., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy, Department of Physics, University of Surrey, Guildford, United Kingdom -- Illana, A., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Jurado-Gomez, M.L., IFIC, CSIC University of Valencia, Paterna, Spain -- Kogimtzis, M., qTFC Daresbury Laboratory, Daresbury, Warrington, United Kingdom -- Lazarus, I., qTFC Daresbury Laboratory, Daresbury, Warrington, United Kingdom -- Legeard, L., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Ljungvall, J., CSNSM, CNRS, IN2P3, University Paris-Sud, Orsay, France -- Maj, A., Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland -- Pasqualato, G., Department of Physics and Astronomy, University of Padua, Padua, Italy, INFN, Division of Padua, Padua, Italy -- Pérez-Vidal, R.M., IFIC, CSIC University of Valencia, Paterna, Spain -- Raggio, A., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy, Department of Physics and Astronomy, University of Padua, Padua, Italy -- Ralet, D., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Redon, N., University of Lyon, CNRS, IN2P3, IPN Lyon, Villeurbanne, France -- Saillant, F., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Sanchis, E., Department of Electric Engineering, University of Valencia, Burjassot, Spain -- Sayğı, B., Ege University, Physics Department, Izmir, Turkey -- Scarcioffolo, M., INFN, Division of Padua, Padua, Italy -- Siciliano, M., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy -- Stezowski, O., University of Lyon, CNRS, IN2P3, IPN Lyon, Villeurbanne, France -- Testov, D., Department of Physics and Astronomy, University of Padua, Padua, Italy, INFN, Division of Padua, Padua, Italy -- Tripon, M., GANIL, CEA/DSAM and CNRS/IN2P3, Caen, France -- Zanon, I., Legnaro National Laboratories (LNL), INFN, Legnaro, Italy, and 0-Belirlenecek

Subjects
Physics, Spectrometer, 010308 nuclear & particles physics, business.industry, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, Neutron multiplicity, 01 natural sciences, 7. Clean energy, 0-Belirlenecek, Physics and Astronomy (all), Optics, Filter (video), 0103 physical sciences, AGATA, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, business, Nuclear Experiment
Abstract

Zakopane Conference on Nuclear Physics - Extremes of the Nuclear Landscape -- AUG 26-SEP 02, 2018 -- Zakopane, POLAND, WOS: 000463866500047, A new neutron multiplicity filter NEDA, after a decade of design, R&D and construction, was employed in its first physics campaign with the AGATA spectrometer. Properties and performance of the array are discussed., Swedish Research CouncilSwedish Research Council [VR 2014-6644]; Scientific and Technological Research Council of Turkey (TUBITAK project)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [117F114, 114F473]; National Science Centre, Poland (NCN) [2017/25/B/ST2/01569, 2016/22/M/ST2/00269, 2014/14/M/ST2/00738, 2013/08/M/ST2/00257]; UK STFCScience & Technology Facilities Council (STFC) [ST/J000124/1, ST/L005727/1, STL005735/1, ST/P003885/1]; Generalitat Valenciana, SpainGeneralitat Valenciana; MICIU, Spain [PROM-ETEO II/2014/019, FPA2017-84756-C4, SEV-2014-0398]; E.C. FEDER fundsEuropean Union (EU), This study was supported by the Swedish Research Council (contract number VR 2014-6644), the Scientific and Technological Research Council of Turkey (TUBITAK project Nos. 117F114 and 114F473), the National Science Centre, Poland (NCN) (grants Nos. 2017/25/B/ST2/01569, 2016/22/M/ST2/00269, 2014/14/M/ST2/00738 and 2013/08/M/ST2/00257) the UK STFC under grant Nos. ST/J000124/1, ST/L005727/1, STL005735/1, ST/P003885/1, the Generalitat Valenciana and MICIU, Spain, grants PROM-ETEO II/2014/019, FPA2017-84756-C4, Severo Ochoa SEV-2014-0398 and by the E.C. FEDER funds.1

Published
2018

45. Evidence for Coexisting Shapes through Lifetime Measurements in Zr 98

Author

Purnima Singh, W. Korten, T. W. Hagen, A. Görgen, L. Grente, M.-D. Salsac, F. Farget, E. Clément, G. de France, T. Braunroth, B. Bruyneel, I. Celikovic, O. Delaune, A. Dewald, A. Dijon, J.-P. Delaroche, M. Girod, M. Hackstein, B. Jacquot, J. Libert, J. Litzinger, J. Ljungvall, C. Louchart, A. Gottardo, C. Michelagnoli, C. Müller-Gatermann, D. R. Napoli, T. Otsuka, N. Pillet, and F. Recchia

Published
2018
Full Text
View/download PDF

46. Instrumentation for Trace Organic Monitoring

Author

Raymond E. Clement and Raymond E. Clement

Subjects
QD271
Abstract

Instrumentation for Trace Organic Monitoring provides comprehensive coverage of instrumental analysis techniques for trace organic analytes in environmental analysis. Sampling/sample preparation is discussed, in addition to mass spectrometry techniques, including GC-MS, HRMS, LCMS, APIMS, and MS-MS. This important book also covers new chromatography techniques, supercritical fluid, solid-phase extraction, and ion mobility spectrometry, which is a new ultra-sensitive technique. Difficult problems, such as dioxin/furan analysis, organometallic speciation, atmospheric organic vapors, water analysis, and flyash toxicity testing are addressed.

Published
2018

48. The Theory of Nilpotent Groups

Author

Anthony E. Clement, Stephen Majewicz, Marcos Zyman, Anthony E. Clement, Stephen Majewicz, and Marcos Zyman

Subjects
Nilpotent groups
Abstract

This monograph presents both classical and recent results in the theory of nilpotent groups and provides a self-contained, comprehensive reference on the topic. While the theorems and proofs included can be found throughout the existing literature, this is the first book to collect them in a single volume. Details omitted from the original sources, along with additional computations and explanations, have been added to foster a stronger understanding of the theory of nilpotent groups and the techniques commonly used to study them. Topics discussed include collection processes, normal forms and embeddings, isolators, extraction of roots, P-localization, dimension subgroups and Lie algebras, decision problems, and nilpotent groups of automorphisms. Requiring only a strong undergraduate or beginning graduate background in algebra, graduate students and researchers in mathematics will find The Theory of Nilpotent Groups to be a valuable resource.

Published
2017

49. Prompt-delayed $\gamma$ γ -ray spectroscopy with AGATA, EXOGAM and VAMOS++

Author

Y. H. Kim, A. Lemasson, M. Rejmund, A. Navin, S. Biswas, C. Michelagnoli, I. Stefan, R. Banik, P. Bednarczyk, S. Bhattacharya, S. Bhattacharyya, E. Clément, H. L. Crawford, G. De France, P. Fallon, J. Goupil, B. Jacquot, H. J. Li, J. Ljungvall, A. O. Macchiavelli, A. Maj, L. Ménager, V. Morel, R. Palit, R. M. Pérez-Vidal, J. Ropert, and C. Schmitt

Subjects
Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Fission, Astrophysics::High Energy Astrophysical Phenomena, 01 natural sciences, Particle detector, Semiconductor detector, Nuclear physics, 0103 physical sciences, Nuclear fusion, AGATA, Gamma spectroscopy, Nuclear Experiment, 010306 general physics, Spectroscopy
Abstract

A new experimental setup to measure prompt-delayed $\gamma$ -ray coincidences from isotopically identified fission fragments, over a wide time range of 100ns-200μ s, is presented. The fission fragments were isotopically identified, on an event-by-event basis, using the VAMOS++ large acceptance spectrometer. The prompt $\gamma$ rays emitted at the target position and corresponding delayed $ \gamma$ rays emitted at the focal plane of the spectrometer were detected using, respectively, thirty two crystals of the AGATA $\gamma$ -ray tracking array and seven EXOGAM HPGe Clover detectors. Fission fragments produced in fusion and transfer-induced fission reactions, using a 238U beam at an energy of 6.2 MeV/u impinging on a 9Be target, were used to characterize and qualify the performance of the detection system.

Published
2017

50. Erratum: Abrupt shape transition at neutron number N=60 : B(E2) values in Sr94,96,98 from fast γ−γ timing [Phys. Rev. C 95 , 054319 (2017)]

Author

J.-M. Régis, J. Jolie, N. Saed-Samii, N. Warr, M. Pfeiffer, A. Blanc, M. Jentschel, U. Köster, P. Mutti, T. Soldner, G. S. Simpson, F. Drouet, A. Vancraeyenest, G. de France, E. Clément, O. Stezowski, C. A. Ur, W. Urban, P. H. Regan, Zs. Podolyák, C. Larijani, C. Townsley, R. Carroll, E. Wilson, L. M. Fraile, H. Mach, V. Paziy, B. Olaizola, V. Vedia, A. M. Bruce, O. J. Roberts, J. F. Smith, M. Scheck, T. Kröll, A.-L. Hartig, A. Ignatov, S. Ilieva, S. Lalkovski, W. Korten, N. Mărginean, T. Otsuka, N. Shimizu, T. Togashi, and Y. Tsunoda

Subjects
Physics, Neutron number, Atomic physics
Published
2017

Catalog

Books, media, physical & digital resources
See catalog results