Author: "R. .. Borcea" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"R. .. Borcea"' showing total 120 results

Start Over Author "R. .. Borcea"

120 results on '"R. .. Borcea"'

1. Fusion and breakup fusion of6Li with194Pt at energies around coulomb barrier

Author: C. .. Petrone, S. .. Calinescu, C. .. Borcea, A. .. Buta, R. .. Borcea, R. .. Margineanu, A. .. Negret, A. .. Olacel, F. .. Rotaru, M. .. Stanoiu, G. .. Suliman, Yu. E. Penionzhkevich, Yu. G. Sobolev, S. M. Lukyanov, N. K. Skobelev, M. P. Ivanov, Ph. .. Dessagne, and M. .. Kerveno
Subjects: Physics, QC1-999
Abstract: Results for fusion and breakup fusion reaction ( 6 Li+ 194 Pt) are presented and compared with other experimental data and model calculations. A strong isotopic effect is observed when comparing our data with results from ( 6 Li+ 198 Pt)
Published: 2021
Full Text: View/download PDF

2. 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

3. 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

4. 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

5. 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
Full Text: View/download PDF

6. 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
Full Text: View/download PDF

7. Coulomb and nuclear excitations of Zn70 and Ni68 at intermediate energy

Author: G. de Angelis, J. Mrazek, L. Perrot, R. Borcea, R. Astabatyan, F. Carstoiu, H. Guerin, M. Stanoiu, T. Roger, S. Grévy, L. Stuhl, C. Petrone, Zs. Podolyák, M. N. Harakeh, A. Lepailleur, J. C. Thomas, L. Cáceres, D. D. Dao, I. Stefan, F. Negoita, M. Krzysiek, A. Gottardo, V. Maslov, S. Bagchi, C. Borcea, Dóra Sohler, I. Matea, O. Wieland, Z. Vajta, F. Nowacki, M. Vandebrouck, P. Morfouace, F. Rotaru, S. Lukyanov, I. Kuti, O. Sorlin, Megumi Niikura, S. Franchoo, A. Krasznahorkay, K. Mazurek, Y. Penionzhkevich, M. Ciemála, A. Maj, Zsolt Dombrádi, C. Rigollet, M. Kmiecik, I. M. Harca, Eric Clément, O. Kamalou, S. Calinescu, and L. Olivier
Subjects: Physics, Proton, 010308 nuclear & particles physics, Prolate spheroid, 01 natural sciences, Spectral line, Intermediate energy, 0103 physical sciences, Oblate spheroid, Coulomb, Atomic physics, 010306 general physics, Beam energy, Excitation
Abstract: The reduced transition probabilities B ( E 2 ; 0 g.s. + → 2 1 + , 2 2 + ) in Zn 70 and the full B ( E 2 ; 0 g.s. + → 2 + ) strength up to S n = 7.79 MeV in Ni 68 have been determined at the LISE/GANIL facility using the Coulomb-excitation technique at intermediate beam energy on a Pb 208 target. The γ rays emitted in-flight were detected with an array of 46 BaF 2 crystals. The angles of the deflected nuclei were determined in order to disentangle and extract the Coulomb and nuclear contributions to the excitation of the 2 + states. The measured B ( E 2 ; 0 g.s. + → 2 1 + ) of 1432(124) e 2 fm 4 for Zn 70 falls in the lower part of the published values which clustered either around 1600 or above 2000 e 2 fm 4 , while the B ( E 2 ; 0 g.s. + → 2 2 + ) of 53(7) e 2 fm 4 agrees very well with the two published values. The relatively low B ( E 2 ; 0 g.s. + → 2 1 + ) of 301(38) e 2 fm 4 for Ni 68 agrees with previous studies and confirms a local magicity at Z = 28 , N = 40 . Combining the results of the low-energy spectra of Ni 68 and Zn 70 and their shell-model interpretations, it is interesting to notice that four different shapes (spherical, oblate, prolate, and triaxial) are present. Finally, a summed E 2 strength of only about 150 e 2 fm 4 has been found experimentally at high excitation energy, likely due to proton excitations across the Z = 28 gap. The experimental distribution of this high-energy E 2 excitation agrees with shell-model calculations, but its strength is about two times weaker.
Published: 2021
Full Text: View/download PDF

8. 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

9. Probing nuclear forces beyond the nuclear drip line: the cases of $^{16}$F and $^{15}$F: A Tribute to Mahir Hussein

Author: L. Caceres, A.M. Sánchez Benítez, Igor T. Čeliković, A. Matta, D. Verney, F. Rotaru, Valdir Guimaraes, P. Adsley, O. Sorlin, J. Guillot, T. Roger, C. Portail, V. Girard-Alcindor, I. Matea, A. Georgiadou, C. Petrone, D. Pantelica, R. Borcea, D. Suzuki, O. Kamalou, V. Lapoux, Megumi Niikura, I. Stefan, J. Piot, F. Flavigny, G. D’Agata, F. de Oliveira Santos, M. Ciemala, V. Tatischeff, V. Chudoba, L. Lalanne, C. Stodel, J. C. Thomas, N. Goyal, M. Stanoiu, C. Fougeres, S. Grévy, F. Negoita, N. de Séréville, L. Perrot, G. Dumitru, M. Assie, A. Meyer, J. C. Angelique, Marlete Assunção, Nicolas Michel, F. Hammache, D. Beaumel, S. Franchoo, Predrag Ujić, Dieter Ackermann, Shoko Koyama, F. de Grancey, J. Kiener, E. Berthoumieux, P. Morfouace, J. Mrazek, K. Subotic, 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), 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Elastic scattering, Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, media_common.quotation_subject, Hadron, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Asymmetry, Excited state, 0103 physical sciences, Nuclear force, Mirror nuclei, Atomic physics, 010306 general physics, Wave function, Nuclear Experiment, media_common
Abstract: The unbound proton-rich nuclei $$^{16}$$ F and $$^{15}$$ F are investigated experimentally and theoretically. Several experiments using the resonant elastic scattering method were performed at GANIL with radioactive beams to determine the properties of the low lying states of these nuclei. Strong asymmetry between $$^{16}$$ F– $$^{16}$$ N and $$^{15}$$ F– $$^{15}$$ C mirror nuclei is observed. The strength of the $$nucleon-nucleon$$ effective interaction involving the loosely bound proton in the $$s_{1/2}$$ orbit is significantly modified with respect to their mirror nuclei $$^{16}$$ N and $$^{15}$$ C. The reduction of the effective interaction is estimated by calculating the interaction energies with a schematic zero-range force. It is found that, after correcting for the effects due to changes in the radial distribution of the single-particle wave functions, the mirror symmetry of the $$n-p$$ interaction is preserved between $$^{16}$$ F and $$^{16}$$ N, while a difference of 63% is measured between the $$p-p$$ versus $$n-n$$ interactions in the second excited state of $$^{15}$$ F and $$^{15}$$ C nuclei. Several explanations are proposed.
Published: 2021
Full Text: View/download PDF

10. Structure of Si33 and the magicity of the N=20 gap at Z=14

Author: F. Rotaru, Kathrin Wimmer, A. Mutschler, A. Lemasson, F. Nowacki, H. Iwasaki, T. Roger, Alexandra Gade, S. R. Stroberg, C. Borcea, M. Vanderbrouck, D. Weisshaar, M. Wiedeking, R. Borcea, O. Sorlin, P. Papka, E. Khan, M. Stanoiu, A. Lepailleur, F. Recchia, D. Bazin, J. A. Tostevin, and S. Jongile
Subjects: Physics, education.field_of_study, Spectrometer, 010308 nuclear & particles physics, SHELL model, Population, Shell (structure), 01 natural sciences, Superconducting cyclotron, Atomic orbital, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, education, Beam (structure)
Abstract: The structure of ³³Si was studied by a one-neutron knockout reaction from a ³⁴Si beam at 98.5 MeV/u incident on a 9 Be target. The prompt γ rays following the de-excitation of ³³Si were detected using the GRETINA γ -ray tracking array while the reaction residues were identified on an event-by-event basis in the focal plane of the S800 spectrometer at the National Superconducting Cyclotron Laboratory. The presently derived spectroscopic factor values, C 2 S , for the 3 / 2 + and 1 / 2 + states, corresponding to a neutron removal from the 0 d 3 / 2 and 1 s 1 / 2 orbitals, agree with shell model calculations and point to a strong N = 20 shell closure. Three states arising from the more bound 0 d 5 / 2 orbital are proposed, one of which is unbound by about 930 keV. The sensitivity of this experiment has also confirmed a weak population of 9 / 2 − and 11 / 2 − 1 , 2 final states, which originate from a higher-order process. This mechanism may also have populated, to some fraction, the 3 / 2 − and 7 / 2 − negative-parity states, which hinders a determination of the C 2 S values for knockout from the normally unoccupied 1 p 3 / 2 and 0 f 7 / 2 orbits.
Published: 2020
Full Text: View/download PDF

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

Author: Q. Deshayes, N. Curtis, F. Rotaru, Maria Fisichella, Franck Delaunay, S. Bailey, X. Pereira-López, Takaharu Otsuka, M. Assié, L. Caceres, F. M. Marqués, S. Franchoo, B. Le Crom, Julien Gibelin, Eric Clément, L. Perrot, A. Gillibert, A. Corsi, P. Morfouace, J. Walshe, S. Leblond, I. Stefan, G. F. Grinyer, J. C. Thomas, N. de Séréville, Daisuke Suzuki, Y. Blumenfeld, J. Piot, A. M. Moro, A. Matta, F. Farget, D. Ramos, R. Borcea, J. Lois-Fuentes, C. Wheldon, M. Stanoiu, N. L. Achouri, B. Bastin, C. Stodel, E. C. Pollacco, W. N. Catford, N. A. Orr, O. Sorlin, V. Lapoux, T. Kokalova, Robin Smith, Toshio Suzuki, T. Roger, Marine Vandebrouck, B. Fernández-Domínguez, Natalia Timofeyuk, A. Knapton, M. Sénoville, J. Pancin, M. Caamaño, Martin Freer, J. A. Lay, F. Hammache, C. Rodriguez-Tajes, O. Kamalou, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Consejo de Instalaciones Científicas y Tecnológicas de UKRI. Reino Unido, Agencia Estatal de Investigación. España, Ministerio de Economia, Industria y Competitividad (MINECO). España, Ministerio de Ciencia, Innovación y Universidades (MICINN). España, European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER), European Union (UE). H2020, Universidade de Santiago de Compostela [Spain] (USC ), 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), 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), Département de Physique Nucléaire (ex SPhN) (DPHN), 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)-Université Paris-Saclay, Normandie Université (NU)-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: Physics, Nuclear and High Energy Physics, Valence (chemistry), 010308 nuclear & particles physics, SHELL model, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Molecular physics, lcsh:QC1-999, Excited state, 0103 physical sciences, Bound state, Neutron, Halo, Nuclear Experiment (nucl-ex), 010306 general physics, Ground state, Nuclear Experiment, ComputingMilieux_MISCELLANEOUS, lcsh:Physics
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 {\nu}1d3/2 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., Comment: 7 pages, 5 figures, Accepted for publication in Physics Letters B
Published: 2020
Full Text: View/download PDF

12. The MUGAST-AGATA-VAMOS campaign: Set-up and performances

Author: D. Mengoni, C. Nicolle, F. Flavigny, F. Noury, N. de Séréville, J.S. Rojo, L. Ménager, J. Goupil, A. Goasduff, F. de Oliveira, F. Hammache, M. Assié, A. Korichi, W. N. Catford, J. Dudouet, L. Lalanne, E. Rindel, L. Vatrinet, Y. Blumenfeld, G. Frémont, V. Girard-Alcindor, D. Ramos, D. Brugnara, A. Matta, B. Fernández-Domínguez, A. Raggio, F. Legruel, F. Didierjean, S. Leblond, P. R. John, A. Lefevre, C. Fougères, M. Stanoiu, C. Lenain, A. Gottardo, I. Zanon, I. Stefan, A. Giret, E. Rauly, C. Aa. Diget, R. Borcea, Franck Delaunay, J. Casal, F. Galtarossa, M. Siciliano, K. Rezynkina, Didier Beaumel, B. Million, Eric Clément, A. Lemasson, 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), 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), 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)-Centre National de la Recherche Scientifique (CNRS)-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 des 2 Infinis de Lyon (IP2I Lyon), 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), 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), Normandie Université (NU)-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 Claude Bernard Lyon 1 (UCBL), and 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)
Subjects: Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Photon, FOS: Physical sciences, Kinematics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Spectrometer, Particle identification, symbols.namesake, Optics, 0103 physical sciences, Solid-state detectors, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electronics, Nuclear Experiment (nucl-ex), 010306 general physics, Spectroscopy, Nuclear Experiment, Instrumentation, Physics, 010308 nuclear & particles physics, business.industry, Direct nuclear reactions, Triple coincidences, Instrumentation and Detectors (physics.ins-det), symbols, AGATA, business, Doppler effect
Abstract: The MUGAST-AGATA-VAMOS set-up at GANIL combines the MUGAST highly-segmented silicon array with the state-of-the-art AGATA array and the large acceptance VAMOS spectrometer. The mechanical and electronics integration copes with the constraints of maximum efficiency for each device, in particular {\gamma}-ray transparency for the silicon array. This complete set-up offers a unique opportunity to perform exclusive measurements of direct reactions with the radioactive beams from the SPIRAL1 facility. The performance of the set-up is described through its commissioning and two examples of transfer reactions measured during the campaign. High accuracy spectroscopy of the nuclei of interest, including cross-sections and angular distributions, is achieved through the triple-coincidence measurement. In addition, the correction from Doppler effect of the {\gamma}-ray energies is improved by the detection of the light particles and the use of two-body kinematics and a full rejection of the background contributions is obtained through the identification of heavy residues. Moreover, the system can handle high intensity beams (up to 108 pps). The particle identification based on the measurement of the time-of-flight between MUGAST and VAMOS and the reconstruction of the trajectories is investigated., Comment: 13 pages, 18 figures
Published: 2021
Full Text: View/download PDF

13. usion and breakup fusion of 6Li with 194Pt at energies around coulomb barrier

Author: C. Petrone, S.Calinescu, C. Borcea, A. Buta, R. Borcea, R. Margineanu, A. Negret, A. Olacel, F. Rotaru, M. Stanoiu, G. Suliman, Yu.E. Penionzhkevich, Yu.G. Sobolev, S.M. Lukyanov, N.K. Skobelev, M.P. Ivanov, Ph. Dessagne, and M. Kerveno
Subjects: fusion and breakup fusion, weakly bound projectile with cluster structure, lcsh:Physics, lcsh:QC1-999
Abstract: Results for fusion and breakup fusion reaction ( 6 Li+ 194 Pt) are presented and compared with other experimental data and model calculations. A strong isotopic effect is observed when comparing our data with results from ( 6 Li+ 198 Pt)
Published: 2017

14. Normal and intruder configurations in Si34 populated in the β− decay of Mg34 and Al34

Author: Ph. Dessagne, Alin Titus Serban, J. Mrazek, J. Pakarinen, V. F. E. Pucknell, O. Sorlin, F. Negoita, P. Morfouace, Carmen Gheorghe, P. Rahkila, E. Rapisarda, C. Sotty, J. Konki, C. Borcea, Olof Tengblad, S. Franchoo, A. N. Andreyev, Ph Morel, A. Turturica, Paul Greenlees, H. M. Lazarus, F. Nowacki, S. Kisyov, A. Poves, M. Stanoiu, R. Mărginean, S. Grévy, R. E. Mihai, L. M. Fraile, Cosmin Teodor Mihai, J. M. Daugas, Thierry Stora, A. Ionescu, A. Negret, M. J. G. Borge, N. Marginean, L. Stan, S. Calinescu, R. Lica, R. Borcea, C. Costache, H. De Witte, István Kuti, Marc Huyse, D. M. Filipescu, R. D. Page, M. Madurga, P. Van Duppen, N. Warr, and F. Rotaru
Subjects: Physics, 010308 nuclear & particles physics, Neutron emission, 0103 physical sciences, SHELL model, Nuclear structure, Atomic physics, 010306 general physics, Spectroscopy, 01 natural sciences
Abstract: The structure of $^{34}$Si was studied through $\gamma$ spectroscopy separately in the $\beta^-$ decays of $^{34}$Mg and $^{34}$Al at the ISOLDE facility of CERN. Different configurations in $^{34}$Si were populated independently from the two recently identified $\beta$-decaying states in $^{34}$Al having spin-parity assignments $J^\pi = 4^-$ dominated by the normal configuration $\pi (d_{5/2})^{-1} \otimes \nu (f_{7/2})$ and $J^\pi = 1^+$ by the intruder configuration $\pi (d_{5/2})^{-1} \otimes \nu (d_{3/2})^{-1}(f_{7/2})^{2}$. The paper reports on spectroscopic properties of $^{34}$Si such as an extended level scheme, spin and parity assignments based on log($ft$) values and $\gamma$-ray branching ratios, absolute $\beta$ feeding intensities and neutron emission probabilities. A total of 11 newly identified levels and 26 transitions were added to the previously known level scheme of $^{34}$Si. Large scale shell-model calculations using the {\sc sdpf-u-mix} interaction, able to treat higher order intruder configurations, are compared with the new results and conclusions are drawn concerning the predictive power of {\sc sdpf-u-mix}, the $N=20$ shell gap, the level of mixing between normal and intruder configurations for the 0$_1^+$, 0$_2^+$ and 2$_1^+$ states and the absence of triaxial deformation in $^{34}$Si.
Published: 2019
Full Text: View/download PDF

15. Reaction studies with an almost total absorption gamma spectrometer

Author: M. Boromiza, C. Petrone, F. Rotaru, I. M. Harca, A. Negret, M. Stanoiu, R. Borcea, C. Borcea, S. Calinescu, and A. Olacel
Subjects: Materials science, Gamma ray spectrometer, Analytical chemistry, Absorption (electromagnetic radiation)
Published: 2019
Full Text: View/download PDF

16. Re-examining the transition into the N = 20 island of inversion: Structure of 30 Mg

Author: M. Labiche, W. N. Catford, A. Banu, Roy Crawford Lemmon, N. A. Orr, L. Gaudefroy, M. Caamaño, F. Negoita, Sebastian Heil, Jason I. Brown, L. Trache, Martin Freer, J. S. Thomas, B. Bastin, N. Patterson, R. Borcea, M. Staniou, Franck Delaunay, N. L. Achouri, S. Franchoo, G. L. Wilson, B. Fernández-Domínguez, Naofumi Tsunoda, Takaharu Otsuka, J. C. Angélique, Marina Petri, E. S. Paul, Stefanos Paschalis, A. O. Macchiavelli, Marielle Chartier, N. I. Ashwood, B. Laurent, Michael Taylor, C. Rodriguez-Tajes, P. Roussel-Chomaz, Alfredo Poves, B. Pietras, UAM. Departamento de Física Teórica, Instituto de Física Teórica (IFT), 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)-Centre National de la Recherche Scientifique (CNRS)-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), 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), Universidade de Santiago de Compostela. Departamento de Física de Partículas, Normandie Université (NU)-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), 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), Laboratoire de physique corpusculaire de Caen ( LPCC ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Ecole 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 ), 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 ), 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: N=20, Nuclear and High Energy Physics, Nuclear Theory, Mg, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Molecular physics, np−nh, Nuclear Theory (nucl-th), Single-neutron, Intermediate energy, 0103 physical sciences, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear theory, Nuclear Experiment, Physics, Decay scheme, Manchester Cancer Research Centre, 010308 nuclear & particles physics, Island of inversion, ResearchInstitutes_Networks_Beacons/mcrc, Física, Parity (physics), lcsh:QC1-999, γ-ray decay scheme, Z=12, Ground state, Excitation, lcsh:Physics
Abstract: Intermediate energy single-neutron removal from $^{31}$Mg has been employed to investigate the transition into the N=20 island of inversion. Levels up to 5~MeV excitation energy in $^{30}$Mg were populated and spin-parity assignments were inferred from the corresponding longitudinal momentum distributions and $\gamma$-ray decay scheme. Comparison with eikonal-model calculations also permitted spectroscopic factors to be deduced. Surprisingly, the 0$^{+}_{2}$ level in $^{30}$Mg was found to have a strength much weaker than expected in the conventional picture of a predominantly $2p - 2h$ intruder configuration having a large overlap with the deformed $^{31}$Mg ground state. In addition, negative parity levels were identified for the first time in $^{30}$Mg, one of which is located at low excitation energy. The results are discussed in the light of shell-model calculations employing two newly developed approaches with markedly different descriptions of the structure of $^{30}$Mg. It is concluded that the cross-shell effects in the region of the island of inversion at Z=12 are considerably more complex than previously thought and that $np - nh$ configurations play a major role in the structure of $^{30}$Mg., Comment: Physics Letters B, Volume 779, 10 April 2018, Pages 124-129
Published: 2018
Full Text: View/download PDF

17. The FAZIA project in Europe: R&D phase

Author: Zbigniew Sosin, E. Vient, F. Gramegna, Paola Marini, F. Salomon, Mariano Vigilante, G. Ademard, Luca Morelli, Gabriele Pasquali, G. Pastore, A. Ordine, Giovanni Casini, L. Roscilli, M. Falorsi, M. F. Rivet, P. Edelbruck, Ismael Martel, R. Giordano, C. Pain, R. Bougault, H. Petrascu, A. Chbihi, G. Brulin, L. Lavergne, Alessandro Olmi, O. Lopez, M. Pârlog, R. Rocco, A.J. Kordyasz, N. Le Neindre, A. Wieloch, C. Spitaels, G. Spadaccini, L. Bardelli, B. Bougard, S. Energico, E. Vanzanella, J.D. Frankland, Krzysztof Korcyl, R. Alba, A. Meoli, E. Piasecki, E. Bonnet, R. Borcea, M. Boisjoli, J.A. Dueñas, L. Ciolacu, M. Kajetanowicz, J. Łukasik, M. Cruceru, A. Boiano, S. Serra, T. Twaróg, Marek Palka, Piotr Pawłowski, K. Ga̧sior, G. Tobia, F. Negoita, B. De Fazio, E. Scarlini, P. Kulig, Andrea Stefanini, I. Cruceru, C. Huss, E. Wanlin, M. Petcu, B. Borderie, A. Grzeszczuk, Y. Merrer, S. Carboni, Simone Valdré, P. Di Meo, Giacomo Poggi, V. Seredov, A. Vanzanella, W. Zipper, G. Tortone, C. Maiolino, D. Sierpowski, G. Pontoriere, P. Desrues, M. Degerlier, Domenico Santonocito, B. D’Aquino, M. Guerzoni, F. Cassese, E. Galichet, G. Passeggio, Giuseppe Vitiello, A. Anastasio, E. Legouée, M. Cinausero, Sandro Barlini, V. Masone, Maurizio Bini, H. Hamrita, Silvia Piantelli, E. Rauly, G. Paduano, D. Gruyer, E. Rosato, M. Bruno, Tomasz Kozik, S. Barbey, C. Cassese, Tommaso Marchi, R. Bougault, G. Poggi, S. Barlini, B. Borderie, G. Casini, A. Chbihi, N. Le Neindre, M. Pârlog, G. Pasquali, S. Piantelli, Z. Sosin, G. Ademard, R. Alba, A. Anastasio, S. Barbey, L. Bardelli, M. Bini, A. Boiano, M. Boisjoli, E. Bonnet, R. Borcea, B. Bougard, G. Brulin, M. Bruno, S. Carboni, C. Cassese, F. Cassese, M. Cinausero, L. Ciolacu, I. Cruceru, M. Cruceru, B. D’Aquino, B. Fazio, M. Degerlier, P. Desrue, P. Meo, J. A. Dueña, P. Edelbruck, S. Energico, M. Falorsi, J. D. Frankland, E. Galichet, K. Gasior, F. Gramegna, R. Giordano, D. Gruyer, A. Grzeszczuk, M. Guerzoni, H. Hamrita, C. Hu, M. Kajetanowicz, K. Korcyl, A. Kordyasz, T. Kozik, P. Kulig, L. Lavergne, E. Legouée, O. Lopez, J. Łukasik, C. Maiolino, T. Marchi, P. Marini, I. Martel, V. Masone, A. Meoli, Y. Merrer, L. Morelli, F. Negoita, A. Olmi, A. Ordine, G. Paduano, C. Pain, M. Pałka, G. Passeggio, G. Pastore, P. Pawłowski, M. Petcu, H. Petrascu, E. Piasecki, G. Pontoriere, E. Rauly, M. F. Rivet, R. Rocco, E. Rosato, L. Roscilli, E. Scarlini, F. Salomon, D. Santonocito, V. Seredov, S. Serra, D. Sierpowski, G. Spadaccini, C. Spitael, A. A. Stefanini, G. Tobia, G. Tortone, T. Twaróg, S. Valdré, A. Vanzanella, E. Vanzanella, E. Vient, M. Vigilante, G. Vitiello, E. Wanlin, A. Wieloch, W. Zipper, 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)-Centre National de la Recherche Scientifique (CNRS)-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), 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), FAZIA, R., Bougault, G., Poggi, S., Barlini, B., Borderie, G., Casini, A., Chbihi, N., Le Neindre, M., Pârlog, G., Pasquali, S., Piantelli, Z., Sosin, G., Ademard, R., Alba, A., Anastasio, S., Barbey, L., Bardelli, M., Bini, A., Boiano, M., Boisjoli, E., Bonnet, R., Borcea, B., Bougard, G., Brulin, M., Bruno, S., Carboni, C., Cassese, F., Cassese, M., Cinausero, L., Ciolacu, I., Cruceru, M., Cruceru, B., D’Aquino, DE FAZIO, Benedetto, M., Degerlier, P., Desrue, P., Di Meo, J. A., Dueña, P., Edelbruck, S., Energico, M., Falorsi, J. D., Frankland, E., Galichet, K., Gasior, F., Gramegna, Giordano, Raffaele, D., Gruyer, A., Grzeszczuk, M., Guerzoni, H., Hamrita, C., Hu, M., Kajetanowicz, K., Korcyl, A., Kordyasz, T., Kozik, P., Kulig, L., Lavergne, E., Legouée, O., Lopez, J., Lukasik, C., Maiolino, T., Marchi, P., Marini, I., Martel, V., Masone, A., Meoli, Y., Merrer, L., Morelli, F., Negoita, A., Olmi, A., Ordine, G., Paduano, C., Pain, M., Palka, G., Passeggio, P., Pawlowski, M., Petcu, H., Petrascu, E., Piasecki, G., Pontoriere, E., Rauly, M. F., Rivet, R., Rocco, Rosato, Elio, L., Roscilli, E., Scarlini, F., Salomon, D., Santonocito, V., Seredov, S., Serra, D., Sierpowski, Spadaccini, Giulio, C., Spitael, A. A., Stefanini, G., Tobia, G., Tortone, T., Twaróg, S., Valdré, A., Vanzanella, E., Vanzanella, E., Vient, Vigilante, Mariano, G., Vitiello, E., Wanlin, A., Wieloch, W., Zipper, Normandie Université (NU)-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), 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), and HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)
Subjects: Physics, NUCLEAR REACTIONS, Nuclear and High Energy Physics, Silicon, SCINTILLATION DETECTORS, Physics::Instrumentation and Detectors, Nuclear engineering, Detector, SILICON DETECTORS, chemistry.chemical_element, Reaction products, Nanotechnology, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Particle detector, Particle identification, Semiconductor detector, chemistry, Scintillation counter, Hermetic detector, PARTICLE IDENTIFICATION
Abstract: The goal of the FAZIA Collaboration is the design of a new-generation 4π detector array for heavy-ion collisions with radioactive beams. This article summarizes the main results of the R&D phase, devoted to the search for significant improvements of the techniques for charge and mass identification of reaction products. This was obtained by means of a systematic study of the basic detection module, consisting of two transmission-mounted silicon detectors followed by a CsI(Tl) scintillator. Significant improvements in ΔE-E and pulse-shape techniques were obtained by controlling the doping homogeneity and the cutting angles of silicon and by putting severe constraints on thickness uniformity. Purposely designed digital electronics contributed to identification quality. The issue of possible degradation related to radiation damage of silicon was also addressed. The experimental activity was accompanied by studies on the physics governing signal evolution in silicon. The good identification quality obtained with the prototypes during the R&D phase, allowed us to investigate also some aspects of isospin physics, namely isospin transport and odd-even staggering. Now, after the conclusion of the R&D period, the FAZIA Collaboration has entered the demonstrator phase, with the aim of verifying the applicability of the devised solutions for the realization of a larger-scale experimental set-up.
Published: 2014
Full Text: View/download PDF

18. High precision measurement of the Ne19β -decay half-life using real-time digital acquisition

Author: C. Fontbonne, P. Ujić, F. de Oliveira Santos, X. Fléchard, F. Rotaru, N. L. Achouri, V. Girard Alcindor, B. Bastin, F. Boulay, J. B. Briand, A. M. Sánchez-Benítez, H. Bouzomita, C. Borcea, R. Borcea, B. Blank, B. Carniol, I. Čeliković, P. Delahaye, F. Delaunay, D. Etasse, G. Fremont, G. de France, J. M. Fontbonne, G. F. Grinyer, J. Harang, J. Hommet, A. Jevremović, M. Lewitowicz, I. Martel, J. Mrazek, M. Parlog, J. Poincheval, D. Ramos, C. Spitaels, M. Stanoiu, J. C. Thomas, and D. Toprek
Subjects: Event selection, Physics, Particle physics, 010308 nuclear & particles physics, 0103 physical sciences, Half-life, Offline analysis, 010306 general physics, 01 natural sciences, Relevant information, Beta decay
Abstract: The half-life of $^{19}\mathrm{Ne}$ was measured using a real-time digital multiparametric acquisition system, providing an accurate time stamp and relevant information on the detector signals for each decay event. An exhaustive offline analysis of the data gave unique access to experimental effects potentially biasing the measurement. After establishing the influence factors impacting the measurement such as after-pulses, pile-up, gain, and baseline fluctuations, their effects were accurately estimated and the event selection optimized. The resulting half-life, $17.2569\ifmmode\pm\else\textpm\fi{}0.{0019}_{(\text{stat})}\ifmmode\pm\else\textpm\fi{}0.{0009}_{(\text{syst})}$ s, is the most precise up to now for $^{19}\mathrm{Ne}$. It is found to be in agreement with two recent precise measurements and not consistent with the most recent one [L. J. Broussard et al., Phys. Rev. Lett. 112, 212301 (2014)] by 3.0 standard deviations. The full potential of the technique for nuclei with half-lives of a few seconds is discussed.
Published: 2017
Full Text: View/download PDF

19. A proton density bubble in the doubly magic $^{34}$Si nucleus

Author: F. Rotaru, Kathrin Wimmer, Alexandra Gade, O. Sorlin, Daniel Bazin, C. Borcea, T. Roger, R. Borcea, Zsolt Dombrádi, J. P. Ebran, S. R. Stroberg, D. Weisshaar, A. Mutschler, M. Stanoiu, Elias Khan, A. Lepailleur, A. Lemasson, Dóra Sohler, F. Recchia, Marine Vandebrouck, H. Iwasaki, J. A. Tostevin, 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), 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), National Superconducting Cyclotron Laboratory (NSCL), Michigan State University [East Lansing], Michigan State University System-Michigan State University System, National Institut for Nuclear Physics and Engineering (IFIN HH), National Institut for Nuclear Physics and Engineering, Institute for Nuclear Research [Budapest] (ATOMKI), Hungarian Academy of Sciences (MTA), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Department of Physics, University of Surrey, University of Surrey (UNIS), 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: Proton, media_common.quotation_subject, Nuclear Theory, Nuclear physics, FOS: Physical sciences, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Asymmetry, 0103 physical sciences, medicine, Neutron, Nuclear Experiment (nucl-ex), Experimental nuclear physics, 010306 general physics, Nuclear Experiment, Quantum, media_common, Physics, 010308 nuclear & particles physics, medicine.anatomical_structure, Isospin, Atomic nucleus, Atomic physics, Electron scattering, Nucleus
Abstract: Many properties of the atomic nucleus, such as vibrations, rotations and incompressibility, can be interpreted as due to a two component quantum liquid of protons and neutrons. Electron scattering measurements on stable nuclei demonstrate that their central densities are saturated, as for liquid drops. In exotic nuclei near the limits of mass and charge, with large imbalances in their proton and neutron numbers, the possibility of a depleted central density, or a 'bubble' structure, has been discussed in a recurrent manner since the 1970s. Here we report first experimental evidence that points to a depletion of the central density of protons in the short-lived nucleus 34Si. The proton-to-neutron density asymmetry in 34Si offers the possibility to place constraints on the density and isospin dependence of the spin--orbit force-on which nuclear models have disagreed for decades-and on its stabilizing effect towards limits of nuclear existence., 6 pages, 3 figures
Published: 2017
Full Text: View/download PDF

20. How sharp is the transition into the $N=20$ island of inversion for the Mg isotopes ?

Author: M. Caamaño, Martin Freer, J Brown, B. Laurent, W. N. Catford, F. Negoita, Marina Petri, G. L. Wilson, N. L. Achouri, A. O. Macchiavelli, Alfredo Poves, Naofumi Tsunoda, B. Pietras, M. Staniou, L. Gaudefroy, E. S. Paul, J. S. Thomas, Stefanos Paschalis, Franck Delaunay, Marielle Chartier, N. I. Ashwood, N. A. Orr, J. C. Angélique, S. Franchoo, Roy Crawford Lemmon, Sebastian Heil, A. Banu, M. Labiche, P. Roussel-Chomaz, Takaharu Otsuka, N. Patterson, B. Bastin, L. Trache, R. Borcea, B. Fernández-Domínguez, Michael Taylor, C. Rodriguez-Tajes, 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)-Centre National de la Recherche Scientifique (CNRS)-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), 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), Normandie Université (NU)-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 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, History, Isotope, 010308 nuclear & particles physics, Island of inversion, SHELL model, Parity (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science Applications, Education, Low energy, 0103 physical sciences, Atomic physics, 010306 general physics
Abstract: International audience; The N=20 island of inversion is an excellent playground for testing shell model calculations. The Mg chain is a region of shell evolution still far from being well understood. In this paper we present preliminary results of a single-neutron knockout experiment from 31Mg performed at GANIL to study the structure of 31Mg and of the core 30Mg. The level scheme and longitudinal momentum distributions were mesured and spectroscopic factors were deduced. Negative parity states arise at low energy and the spectroscopic factor for the isomeric in 30Mg was determined to be smaller than foreseen in the standard picture. The preliminary experimental results are compared to state-of the art shell model calculations revealing opposed interpretations.
Published: 2017
Full Text: View/download PDF

21. New Prompt Fission γ-ray Data in Response to the OECD/NEA High Priority Request

Author: F.-J. Hambsch, László Szentmiklósi, Andreas Oberstedt, Marzio Vidali, T. Bryś, T. Martinez Perez, Stephan Oberstedt, R. Billnert, Alf Göök, Tamás Belgya, R. Borcea, Z. Kish, and W. Geerts
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Fission, Gamma ray, Nuclear data
Abstract: In this paper we report about new prompt fission gamma-ray measurements, which we have performed with highly efficient gamma-ray detectors based on lanthanide-halide crystals, aiming at very fast timing in conjunction with a good energy resolution. About four decades after the experiments were performed, whose results are still used for current evaluations, we present new spectral prompt fission gamma-ray data from the reactions Cf-252(SF) and U-235(n(th),f). Based on our new findings we recommend to replace the current ENDF/B-VII. 1 evaluation for Cf-252(SF) and U-235(n(th),f) as well as to perform new measurements for U-238(n,f) and Pu-241(n,f).
Published: 2014
Full Text: View/download PDF

22. Decay properties of high spin states in Mn

Author: D. Bazzacco, J. A. Cameron, C. Rossi Alvarez, J. Sanchez-Solano, H. Grawe, A. Gadea, E. Farnea, S. M. Lenzi, F. Brandolini, D. Cano-Ott, M. De Poli, G. de Angelis, C. A. Ur, D. R. Napoli, J. Döring, M. Axiotis, C. A. Kalfas, E. Nâcher Gonzalez, Gabriel Martínez-Pinedo, Berta Rubio, S. Lunardi, R. Borcea, N. Marginean, J. L. Tain, T. Martinez, E. Roeckl, and C. Mazzocchi
Subjects: Physics, Recoil, Spin states, Spins, Attenuation, Detector, Shell (structure), Atomic physics, Coincidence
Abstract: The electromagnetic decay properties of high spin states in 52Mn have been studied through various experiments with the GASP and EUROBALL arrays plus the ISIS charged-particle detector, the Neutron-Wall and the Recoil Filter Detector. From 7-7-particles coincidence measurements, spins and parities of these states have been determined and using the Doppler-shift attenuation method the mean life of some of these states have been determined. These results are compared with large scale shell-model calculations in the full fp shell.
Published: 2019
Full Text: View/download PDF

23. Comparison of charged particle identification using pulse shape discrimination and ΔE−E methods between front and rear side injection in silicon detectors

Author: A. Grzeszczuk, O. Lopez, P. Edelbruck, S. Carboni, R. Alba, V. L. Kravchuk, Sandro Barlini, M. Bruno, Gabriele Pasquali, Tommaso Marchi, Andrea Stefanini, T. Twaróg, Alessandro Olmi, F. Gramegna, Ivano Lombardo, I. Cruceru, M. Pârlog, Elio Rosato, Silvia Piantelli, L. Bardelli, Mariano Vigilante, G. Spadaccini, M. Petcu, R. Bougault, Tomasz Kozik, M. Degerlier, E. Vient, E. Bonnet, M. F. Rivet, B. Borderie, H. Petrascu, A. Chbihi, K. Ga¸sior, N. Le Neindre, Maurizio Bini, J.D. Frankland, Luca Morelli, J.A. Dueñas, Domenico Santonocito, R. Borcea, G. Baiocco, D. Gruyer, Giovanni Casini, F. Negoita, M. Cinausero, F. Salomon, E. Legouée, M. Kamuda, Giacomo Poggi, C. Maiolino, and Paola Marini
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Silicon, 010308 nuclear & particles physics, business.industry, Detector, chemistry.chemical_element, 01 natural sciences, Charged particle, Ion, Pulse (physics), Optics, chemistry, Electric field, Rise time, 0103 physical sciences, 010306 general physics, business, Instrumentation
Abstract: The response of silicon-silicon-CsI(Tl) telescopes, developed within the FAZIA collaboration, to fragments produced in nuclear reactions 84 Krþ 120-124 Sn at 35 A MeV, has been used to study ion identification methods. Two techniques are considered for the identification of the nuclear products in the silicon stages. The standard DEE one requires signals induced in two detection layers by ions punching through the first one. Conversely, the digital Pulse Shape Analysis (PSA) allows the identification of ions stopped in the first silicon layer. The capabilities of these two identification methods have been compared for different mountings of the silicons, i.e. rear (particles entering through the low electric field side) or front (particles entering through the high electric field side) side injection. The DEE identification method gives exactly the same results in both configurations. At variance, the pulse shape discrimination is very sensitive to the detector mounting. In case of rear side injection, the identification with the ''energy vs. charge rise time'' PSA method presents energy thresholds which are significantly lower than in the case of front side injection. & 2012 Elsevier B.V. All rights reserved.
Published: 2013
Full Text: View/download PDF

24. FUSION AND BREAKUP FUSION OF $^6$Li WITH $^{194}$Pt AT ENERGIES AROUND COULOMB BARRIER

Author: Ph. Dessagne, C. Petrone, R. Margineanu, F. Rotaru, C. Borcea, Yu. E. Penionzhkevich, S. M. Lukyanov, G. Suliman, M. P. Ivanov, M. Stanoiu, Yu. G. Sobolev, A. Negret, M. Kerveno, R. Borcea, N. K. Skobelev, A. Buta, A. Olacel, S. Calinescu, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-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, Nuclear physics, Fusion, Coulomb barrier, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, Fusion and breakup fusion, 7. Clean energy
Abstract: International audience; Results for fusion and breakup fusion reaction 6Li+194Pt are presented and compared with other experimental data and model calculations. A strong isotopic effect is observed when comparing our data with results from 6Li+198Pt.
Published: 2016
Full Text: View/download PDF

25. Nearly degenerate isomeric states ofCu75

Author: M. Stanoiu, L. Gaudefroy, R. Borcea, O. Sorlin, O. Kamalou, C. Plaisir, S. Calinescu, F. Rotaru, C. Petrone, C. Borcea, T. Faul, G. Gey, J. C. Thomas, G. S. Simpson, L. Caceres, R. Chevrier, J. M. Daugas, F. Negoita, and G. Georgiev
Subjects: Physics, Valence (chemistry), 010308 nuclear & particles physics, 0103 physical sciences, Degenerate energy levels, Atomic physics, Nuclear Experiment, 010306 general physics, Spectroscopy, 01 natural sciences
Abstract: The decays of two isomeric states in the neutron-rich nucleus $^{75}\mathrm{Cu}$ have been studied via delayed $\ensuremath{\gamma}$-ray spectroscopy. These states were populated by the fragmentation of a $60.4\phantom{\rule{4pt}{0ex}}A\phantom{\rule{0.16em}{0ex}}\mathrm{MeV} ^{86}\mathrm{Kr}$ primary beam, which impinged on a Be target at the LISE2k spectrometer of GANIL. Isomeric half-lives and branching ratios were measured, and a $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidence analysis performed. These have allowed a revised level scheme of $^{75}\mathrm{Cu}$ to be proposed. A comparison with large-scale shell-model calculations using different effective interactions and valence spaces shows the importance of proton excitations across the $Z=28$ shell gap for reproducing the energy spacing between the isomeric states. The coexisting collective and single-particle properties of the $(1/{2}^{\ensuremath{-}})$ and $(3/{2}^{\ensuremath{-}})$ states, respectively, are similar to those of the same states in the neighboring $^{69,71,73}\mathrm{Cu}$. The small energy spacings between the $(1/{2}^{\ensuremath{-}}), (3/{2}^{\ensuremath{-}})$, and $5/{2}^{\ensuremath{-}}$ states are responsible for the isomerism.
Published: 2016
Full Text: View/download PDF

26. Single-particle strength in neutron-richCu69from theZn70(d,He3)Cu69proton pick-up reaction

Author: C. Petrone, P. Morfouace, S. Franchoo, M. Assié, D. R. Napoli, J. Guillot, I. Stefan, F. Azaiez, L. Lefebvre, D. Suzuki, I. Matea, D. Mengoni, D. Testov, C. Borcea, N. de Séréville, B. Le Crom, L. Grassi, M. Stanoiu, R. Borcea, Fairouz Hammache, and Kamila Sieja
Subjects: Physics, Spectrometer, Proton, 010308 nuclear & particles physics, 01 natural sciences, Deuterium, 0103 physical sciences, Particle, Neutron, Born approximation, Atomic physics, 010306 general physics, Beam (structure), Energy (signal processing)
Abstract: We have performed the $^{70}\mathrm{Zn}(d,^{3}\mathrm{He})^{69}\mathrm{Cu}$ proton pick-up reaction in direct kinematics using a deuteron beam at 27 MeV. The outgoing $^{3}\mathrm{He}$ particles were detected at the focal-plane detection system of an Enge split-pole spectrometer. The excitation-energy spectrum was reconstructed up to 7 MeV and spectroscopic factors were obtained after analysis of the angular distributions in the finite-range distorted-wave Born approximation. The results show three new angular distributions for which the $\ensuremath{\pi}{f}_{7/2}$ strength was measured and a lower limit of the centroid is established. State-of-the-art shell-model calculations are performed and predict a $\ensuremath{\pi}{f}_{7/2}$ strength that lies too high in energy in comparison to our experimental results.
Published: 2016
Full Text: View/download PDF

27. Coulomb excitation ofCa44andAr46

Author: E. Wilson, P. Morfouace, István Kuti, S. Franchoo, T. Roger, Zsolt Dombrádi, J. Mrazek, Megumi Niikura, C. Petrone, W. N. Catford, Zs. Podolyák, O. Sorlin, I. Stefan, S. Calinescu, S. M. Lukyanov, R. Garcia, L. Perrot, M. Bowry, V. A. Maslov, R. A. Astabatyan, Dóra Sohler, Emyr Clement, F. Negoita, S. Grévy, Yu. Penionzhkevich, I. H. Guerin, Zs. Vajta, R. Borcea, C. Borcea, J. C. Thomas, M. Stanoiu, A. Lepailleur, R. Gillibert, F. Rotaru, and L. Caceres
Subjects: Physics, Intermediate energy, 010308 nuclear & particles physics, Drop (liquid), 0103 physical sciences, SHELL model, Coulomb excitation, Atomic physics, 010306 general physics, 01 natural sciences
Abstract: The reduced transition probabilities B(E2; 0+ g.s. → 2+ 1 ) of the 46Ar and 44Ca nuclei were studied using the Coulomb excitation technique at intermediate energy at the LISE/GANIL facility. The in-flight γ rays, emitted after the Coulomb excitation of their first 2+ states, were detected in an array of 64 BaF2 crystals. The present B(E2 ↑) value for 44Ca, 475(36) e2fm4 , agrees well with the value of 495(35) e2fm4 obtained by averaging results of previous experiments. Consistent B(E2; 0+ g.s. → 2+ 1 ) values of 225(29) e2fm4 and 234(19) e2fm4 have been obtained for 46Ar from an absolute and a relative measurement, normalized to the 44Ca value. Both results agree with the ones obtained with the same experimental technique at the NSCL facility but are a factor of 2 smaller than the shell model predictions. The drop in B(E2; 0+ g.s. → 2+ 1 ) in the Ar chain at N = 28, confirmed in this experiment, shows that 46Ar is sensitive to the N = 28 shell closure.
Published: 2016
Full Text: View/download PDF

28. Spectroscopy of $^{35}$P using the one-proton knockout reaction

Author: T. Roger, F. Rotaru, C. Borcea, A. Mutschler, D. Weisshaar, Kathrin Wimmer, A. Lemasson, O. Sorlin, F. Recchia, Marine Vandebrouck, D. Bazin, Alexandra Gade, J. A. Tostevin, H. Iwasaki, S. R. Stroberg, E. Khan, M. Stanoiu, A. Lepailleur, R. Borcea, 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), 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), NSCL and Department of Physics and Astronomy (NSCL), NSCL, National Institut for Nuclear Physics and Engineering (IFIN HH), National Institut for Nuclear Physics and Engineering, TRIUMF [Vancouver], Department of Physics, University of Surrey, University of Surrey (UNIS), 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 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, Angular momentum, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Projectile, Nuclear Theory, FOS: Physical sciences, Parity (physics), 24.50.+g,25.60.Gc,21.10.Jx,25.60.Lg, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 3. Good health, Cardinal point, Excited state, 0103 physical sciences, Neutron, Atomic physics, Nuclear Experiment (nucl-ex), 010306 general physics, Spectroscopy, Nuclear Experiment, Excitation
Abstract: The structure of $^{35}$P was studied with a one-proton knockout reaction at88~MeV/u from a $^{36}$S projectile beam at NSCL. The $\gamma$ rays from thedepopulation of excited states in $^{35}$P were detected with GRETINA, whilethe $^{35}$P nuclei were identified event-by-event in the focal plane of theS800 spectrograph. The level scheme of $^{35}$P was deduced up to 7.5 MeV using$\gamma-\gamma$ coincidences. The observed levels were attributed to protonremovals from the $sd$-shell and also from the deeply-bound $p\_{1/2}$ orbital.The orbital angular momentum of each state was derived from the comparisonbetween experimental and calculated shapes of individual ($\gamma$-gated)parallel momentum distributions. Despite the use of different reactions andtheir associate models, spectroscopic factors, $C^2S$, derived from the$^{36}$S $(-1p)$ knockout reaction agree with those obtained earlier from$^{36}$S($d$,\nuc{3}{He}) transfer, if a reduction factor $R\_s$, as deducedfrom inclusive one-nucleon removal cross sections, is applied to the knockout transitions.In addition to the expected proton-hole configurations, other states were observedwith individual cross sections of the order of 0.5~mb. Based on their shiftedparallel momentum distributions, their decay modes to negative parity states,their high excitation energy (around 4.7~MeV) and the fact that they were notobserved in the ($d$,\nuc{3}{He}) reaction, we propose that they may resultfrom a two-step mechanism or a nucleon-exchange reaction with subsequent neutronevaporation. Regardless of the mechanism, that could not yet be clarified, thesestates likely correspond to neutron core excitations in \nuc{35}{P}. Thisnewly-identified pathway, although weak, offers the possibility to selectivelypopulate certain intruder configurations that are otherwise hard to produceand identify., Comment: 5 figures, 1 table, accepted for publication in Physical Review C
Published: 2016
Full Text: View/download PDF

29. An above-barrier narrow resonance in F-15

Author: F. de Grancey, M. Fadil, Marek Ploszajczak, Nicolas Michel, N. A. Smirnova, I. Stefan, M. Assié, F. de Oliveira Santos, V. Chudoba, J. M. Daugas, R. Borcea, J. C. Thomas, E. Berthoumieux, J. C. Angélique, Thomas Davinson, O. Roig, Predrag Ujić, Igor T. Čeliković, L. Perrot, F. Negoita, A. Mercenne, F. Rotaru, M. G. Pellegriti, C. Stodel, G. Dumitru, G. Randisi, M. G. Saint Laurent, I. Ray, A. Lefebvre-Schuhl, R. Wolski, S. Grévy, A. Buta, O. Sorlin, J. Okolowicz, Vincent Tatischeff, J. Mrazek, M. Stanoiu, Jürgen Kiener, D. Pantelica, K. Subotic, 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), 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)-Centre National de la Recherche Scientifique (CNRS)-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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), Normandie Université (NU)-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 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)
Subjects: Nuclear and High Energy Physics, Proton, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Elastic proton scattering, lifetimes, width, 01 natural sciences, Unbound States, 0103 physical sciences, Unbound states, medicine, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Wave function, Nuclear Experiment, 15F, Elastic scattering, Physics, Valence (chemistry), 25.60.-t, 25.70.Ef, 25.40.Cm, 21.10.-k, 27.20.+n, 21.10.Tg, 010308 nuclear & particles physics, F-15, Resonance, Overbarrier resonance, lcsh:QC1-999, width, medicine.anatomical_structure, Excited state, Resonances, lifetimes, Physics::Accelerator Physics, Atomic physics, Elastic proton scattering, Nucleus, lcsh:Physics
Abstract: Intense and purified radioactive beam of post-accelerated $^{14}$O was used to study the low-lying states in the unbound $^{15}$F nucleus. Exploiting resonant elastic scattering in inverse kinematics with a thick target, the second excited state, a resonance at E$\_R$=4.757(6)(10)~MeV with a width of $\Gamma$=36(5)(14)~keV was measured for the first time with high precision. The structure of this narrow above-barrier state in a nucleus located two neutrons beyond the proton drip line was investigated using the Gamow Shell Model in the coupled channel representation with a $^{12}$C core and three valence protons. It is found that it is an almost pure wave function of two quasi-bound protons in the $2s\_{1/2}$ shell., Comment: 8 pages, 2 figures, 1 table, Submitted to Phys. Lett. B
Published: 2016
Full Text: View/download PDF

30. Investigation of the Fission Process at IRMM

Author: Sh. Zeynalov, A. Al-Adil, R. Borcea, F.-J. Hambsch, Stephan Oberstedt, Andreas Oberstedt, and Anabella Tudora
Subjects: Nuclear physics, Physics, Fission, Scientific method, General Physics and Astronomy, Atomic physics
Abstract: The investigation of the fission process is and has been a major undertaking at IRMM. The most recent investigations concerned the reaction (234)U(n,f) and (238)U(n,f) around vibrational resonances ...
Published: 2011
Full Text: View/download PDF

31. The decay of proton-rich nuclei in the mass region

Author: S. Czajkowski, A. Bey, A. J. Boston, F. Becker, M. Caamaño, F. de Oliveira Santos, Robert Grzywacz, S. Grévy, P. Mayet, Margareta Hellström, C. Dossat, F. Aksouh, Marielle Chartier, V. A. Maslov, C. Moore, M. Stanoiu, Georgi P. Georgiev, D. Cortina, A Fleury, J. Giovinazzo, M. Pfützner, J. C. Thomas, C. Mazzocchi, M. J. Lopez Jimenez, B. Blank, D. Karamanis, I. Matea, C. Borcea, Michio Honma, Z. Janas, J. Kurcewicz, M. Lewitowicz, G. Canchel, N. Adimi, I. Stefan, R. Borcea, and M.S. Pravikoff
Subjects: Physics, Nuclear and High Energy Physics, Decay scheme, Proton, 010308 nuclear & particles physics, Branching fraction, Nuclear Theory, Half-life, 01 natural sciences, 7. Clean energy, Mass formula, Nuclear physics, 0103 physical sciences, Isobaric process, Atomic physics, Proton emission, Nuclear Experiment, 010306 general physics, Multiplet
Abstract: In a series of experiments at the SISSI/LISE3 facility of GANIL conducted between 1999 and 2004, we have collected decay information for proton-rich nuclei between {sup 36}Ca and {sup 56}Zn. The data allowed us to study the decay properties of 26 nuclei. The main experimental information obtained for all nuclei is their {beta}-decay half-life and their total {beta}-delayed proton emission branching ratio. For many nuclei, individual proton groups and {gamma} rays were identified and allowed us to establish first partial decay schemes for some of the nuclei studied. In addition, mass-excess values have been determined for some of the nuclei by means of the isobaric multiplet mass equation. For {sup 50}Ni, the decay via {beta}-delayed two-proton emission could be tentatively identified. The decay of {sup 49}Ni allowed for the first time to identify the first 2{sup +} state in {sup 48}Fe. The experimental data are confronted to model predictions for the half-life and the mass-excess values.
Published: 2007
Full Text: View/download PDF

32. Spectroscopy ofNa28: Shell evolution toward the drip line

Author: L. Gaudefroy, E. Lunderberg, T. Redpath, J. Lloyd, E. Khan, A. Westerberg, M. Stanoiu, A. Lepailleur, C. Langer, D. Barofsky, Alexandra Gade, C. Bancroft, T.R. Baugher, O. Llidoo, O. Sorlin, S. Saenz, B. Bastin, L. Caceres, F. Negoita, V. Bildstein, V. M. Bader, M. G. Saint-Laurent, F. de Oliveira Santos, F. Recchia, A. Mutschler, J. C. Thomas, S. Grévy, C. Borcea, D. Bazin, S. R. Stroberg, F. Rotaru, G. Perdikakis, Kathrin Wimmer, G. F. Grinyer, D. Smalley, T. Kröll, Marine Vandebrouck, Dóra Sohler, R. Borcea, D. Weisshaar, H. Iwasaki, T. Roger, B. A. Brown, and A. Lemasson
Subjects: Physics, Nuclear and High Energy Physics, Superconducting cyclotron, 010308 nuclear & particles physics, Excited state, 0103 physical sciences, Binding energy, SHELL model, Atomic physics, 010306 general physics, Spectroscopy, 01 natural sciences, Spectral line
Abstract: Excited states have been studied in $^{28}\mathrm{Na}$ using the $\ensuremath{\beta}$-decay of implanted $^{28}\mathrm{Ne}$ ions at the Grand Acc\'el\'erateur National d'Ions Lourds/LISE as well as the in-beam $\ensuremath{\gamma}$-ray spectroscopy at the National Superconducting Cyclotron Laboratory/S800 facility. New states of positive $({J}^{\ensuremath{\pi}}={3}^{+},{4}^{+})$ and negative $({J}^{\ensuremath{\pi}}={1}^{\ensuremath{-}}--{5}^{\ensuremath{-}})$ parity are proposed. The former arise from the coupling between $0{d}_{5/2}$ protons and $0{d}_{3/2}$ neutrons, while the latter are attributable to couplings of $0{d}_{5/2}$ protons with $1{p}_{3/2}$ or $0{f}_{7/2}$ neutrons. While the relative energies between the ${J}^{\ensuremath{\pi}}={1}^{+}--{4}^{+}$ states are well reproduced with the USDA interaction in the $N=17$ isotones, a progressive shift in the ground-state binding energy (by about 500 keV) is observed between $^{26}\mathrm{F}$ and $^{30}\mathrm{Al}$. This points to a possible change in the proton-neutron $0{d}_{5/2}\text{\ensuremath{-}}0{d}_{3/2}$ effective interaction when moving from stability to the drip line. The presence of ${J}^{\ensuremath{\pi}}={1}^{\ensuremath{-}}--{4}^{\ensuremath{-}}$ negative-parity states around 1.5 MeV as well as of a candidate for a ${J}^{\ensuremath{\pi}}={5}^{\ensuremath{-}}$ state around 2.5 MeV give further support to the collapse of the $N=20$ gap and to the inversion between the neutron $0{f}_{7/2}$ and $1{p}_{3/2}$ levels below $Z=12$. These features are discussed in the framework of shell-model and energy-density-functional calculations, leading to predicted negative-parity states in the low-energy spectra of the $^{26}\mathrm{F}$ and $^{25}\mathrm{O}$ nuclei.
Published: 2015
Full Text: View/download PDF

33. Properties of Intruder States in 34Al and 34Si

Author: J. M. Daugas, F. Rotaru, F. Negoita, Ph. Dessagne, J. Mrazek, A. Negret, S. Toma, D. M. Filipescu, Thierry Stora, L. M. Fraille, T. Sava, István Kuti, Ioana Gheorghe, M. Stanoiu, D. Pietreanu, D. Sohler, P. Morfouace, R. Mărginean, S. Calinescu, S. Franchoo, N. Marginean, I. Stefan, C. Borcea, Cosmin Teodor Mihai, Ph Morel, R. Suvaila, R. Lica, R. Borcea, and S. Grévy
Subjects: Physics, Database, computer.software_genre, computer
Published: 2015
Full Text: View/download PDF

34. Comparison of charged particle identification using pulse shape discrimination and methods between front and rear side injection in silicon detectors

Author: N. Le Neindre, R. Bougault, S. Barlini, E. Bonnet, B. Borderie, G. Casini, A. Chbihi, P. Edelbruck, J. D. Frankland, D. Gruyer, E. Legouée, O. Lopez, P. Marini, M. Pârlog, G. Pasquali, M. Petcu, M. F. Rivet, F. Salomon, E. Vient, R. Alba, L. Bardelli, M. Bini, R. Borcea, S. Carboni, M. Cinausero, I. Cruceru, M. Degerlier, J. A. Dueñas, K. Ga¸sior, F. Gramegna, A. Grzeszczuk, M. Kamuda, T. Kozik, V. Kravchuk, I. Lombardo, C. Maiolino, T. Marchi, F. Negoita, A. Olmi, H. Petrascu, S. Piantelli, G. Poggi, E. Rosato, D. Santonocito, G. Spadaccini, A. A. Stefanini, T. Twaróg, M. Vigilante, BAIOCCO, GIORGIO, BRUNO, MAURO, MORELLI, LUCA, N. Le Neindre, R. Bougault, S. Barlini, E. Bonnet, B. Borderie, G. Casini, A. Chbihi, P. Edelbruck, J.D. Frankland, D. Gruyer, E. Legouée, O. Lopez, P. Marini, M. Pârlog, G. Pasquali, M. Petcu, M.F. Rivet, F. Salomon, E. Vient, R. Alba, G. Baiocco, L. Bardelli, M. Bini, R. Borcea, M. Bruno, S. Carboni, M. Cinausero, I. Cruceru, M. Degerlier, J.A. Dueña, K. Ga¸sior, F. Gramegna, A. Grzeszczuk, M. Kamuda, T. Kozik, V. Kravchuk, I. Lombardo, C. Maiolino, T. Marchi, L. Morelli, F. Negoita, A. Olmi, H. Petrascu, S. Piantelli, G. Poggi, E. Rosato, D. Santonocito, G. Spadaccini, A.A. Stefanini, T. Twaróg, and M. Vigilante
Subjects: pulse shape analysis, ddc:530, particle identification
Abstract: The response of silicon–silicon–CsI(Tl) telescopes, developed within the FAZIA collaboration, to fragments produced in nuclear reactions 84Kr+120-124Sn at 35 A MeV, has been used to study ion identification methods. Two techniques are considered for the identification of the nuclear products in the silicon stages. The standard ΔE−E one requires signals induced in two detection layers by ions punching through the first one. Conversely, the digital Pulse Shape Analysis (PSA) allows the identification of ions stopped in the first silicon layer. The capabilities of these two identification methods have been compared for different mountings of the silicons, i.e. rear (particles entering through the low electric field side) or front (particles entering through the high electric field side) side injection. The ΔE−E identification method gives exactly the same results in both configurations. At variance, the pulse shape discrimination is very sensitive to the detector mounting. In case of rear side injection, the identification with the “energy vs. charge rise time” PSA method presents energy thresholds which are significantly lower than in the case of front side injection.
Published: 2013
Full Text: View/download PDF

35. Comparison of charged particle identification using pulse shape discrimination and ΔE-E methods between front and rear injection in silicon detector

Author: N. LeNeindre, R. Bougault, S. Barlini, E. Bonnet, B. Borderie, G. Casini, A. Chbihi, P. Edelbruck, J. D. Frankland, D. Gruyer, E. Legouée, O. Lopez, P. Marini, M. Parlog, G. Pasquali, M. Petcu, M. F. Rivet, F. Salomon, E. Vient, R. Alba, G. Baiocco, L. Bardelli, M. Bini, R. Borcea, M. Bruno, S. Carboni, M. Cinausero, I. Cruceru, M. Degerlier, J. A. Dueñas, K. Gasior, F. Gramegna, A. Grzeszczuk, M. Kamuda, T. Kozik, V. L. Kravchuk, C. Maiolino, T. Marchi, L. Morelli, F. Negoita, A. Olmi, H. Petrascu, S. Piantelli, G. Poggi, D. Santonocito, A. A. Stefanini, T. Twarog, LOMBARDO, IVANO, ROSATO, ELIO, SPADACCINI, GIULIO, VIGILANTE, MARIANO, N., Leneindre, R., Bougault, S., Barlini, E., Bonnet, B., Borderie, G., Casini, A., Chbihi, P., Edelbruck, J. D., Frankland, D., Gruyer, E., Legouée, O., Lopez, P., Marini, M., Parlog, G., Pasquali, M., Petcu, M. F., Rivet, F., Salomon, E., Vient, R., Alba, G., Baiocco, L., Bardelli, M., Bini, R., Borcea, M., Bruno, S., Carboni, M., Cinausero, I., Cruceru, M., Degerlier, J. A., Dueña, K., Gasior, F., Gramegna, A., Grzeszczuk, M., Kamuda, T., Kozik, V. L., Kravchuk, Lombardo, Ivano, C., Maiolino, T., Marchi, L., Morelli, F., Negoita, A., Olmi, H., Petrascu, S., Piantelli, G., Poggi, Rosato, Elio, D., Santonocito, Spadaccini, Giulio, A. A., Stefanini, T., Twarog, and Vigilante, Mariano
Subjects: Pulse shape discrimination ΔE E Silicon detector Charge signal Current signal
Abstract: The response of silicon–silicon–CsI(Tl) telescopes,developed within the FAZIA collaboration, to fragments produced in nuclear reactions 84Kr+120-124Sn at 35 AMeV, has been used to study ion identification methods. Two techniques are considered for thei dentification of thenuclear products in the silicon stages. The standard ΔE-E one requires signals induced in two detection layers by ions punching through the first one. Conversely, the digital Pulse Shape Analysis (PSA) allows the identification of ions stopped in the first silicon layer. The capabilities of these two identification methods have been compared for different mountings of thesilicons, i.e.rear (particles entering through the low electric field side) or front (particles entering through the high electric field side) side injection.The ΔE-E identification method gives exactly the same results in both configurations. At variance, the puls eshape discrimination is very sensitive to the detector mounting. In case of rear side injection, the identification with the‘‘energyvs.charge risetime’’ PSA method presents energy thresholds which are significantly lower than in the case of front side injection.
Published: 2013

36. Evolution of single-particle strength in neutron-rich 71Cu

Author: C. Louchart, G. Marquínez-Durán, P. Morfouace, M. Assié, S. Franchoo, S. Boissinot, D. Beaumel, F. Azaiez, D. Mengoni, J. A. Scarpaci, D. R. Napoli, R. Borcea, Zsolt Dombrádi, Kamila Sieja, L. Lefebvre, A. Matta, Zs. Vajta, F. Recchia, A. Lepailleur, C. Stodel, M. Niikura, Ismael Martel, N. de Séréville, G. Burgunder, B. Fernández-Domínguez, L. Caceres, O. Sorlin, I. Stefan, O. Kamalou, A. M. Sánchez-Benítez, S. Grévy, L. Nalpas, J. Elseviers, A. Gillibert, V. Lapoux, I. Matea, C. Borcea, Fairouz Hammache, M. Stanoiu, Dóra Sohler, J. C. Thomas, S. Giron, 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 Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), 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)-Université Paris-Saclay, 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), Universidade de Santiago de Compostela [Spain] (USC ), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), GANILEXP, Universidade de Santiago de Compostela. Departamento de Física de Partículas, 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), 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), and 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)
Subjects: Physics, Nuclear and High Energy Physics, Proton, Fizikai tudományok, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, lcsh:QC1-999, Nuclear physics, Cross section (physics), Distribution (mathematics), Atomic orbital, Természettudományok, Particle, Neutron, Atomic physics, Born approximation, Nuclear Experiment, Radioactive beam, lcsh:Physics
Abstract: The strength functions of the πf5/2πf5/2, πp3/2πp3/2 and πf7/2πf7/2 orbitals in neutron-rich 71Cu were obtained in a 72Zn(d,3He)71Cu proton pick-up reaction in inverse kinematics using a radioactive beam of 72Zn at 38 MeV/u. A dedicated set-up was developed to overcome the experimental challenges posed by the low cross section of the reaction and the low energy of the outgoing 3He particles. The excitation-energy spectrum was reconstructed and spectroscopic factors were obtained after analysis of the angular distributions with the finite-range Distorted-Wave Born Approximation (DWBA). The results show that unlike for the πf5/2πf5/2 orbital and contrary to earlier interpretation, the πf7/2πf7/2 single-particle strength distribution is not appreciably affected by the addition of neutrons beyond N=40N=40., The authors are thankful to the Ganil accelerator staff, informatics service and to the IPN design office. We are grateful for the grant of the Romanian National Authority for Scientific Research, CNCS - UEFISCDI, project number PN-II-ID-PCE-2011-3-048, to the grant FPA2010-22131-C02-01 from the Spanish government and to the OTKA contract No. K100835.
Published: 2015
Full Text: View/download PDF

37. Nuclear structure studies of $^{24}$F

Author: Jason D. Holt, Zs. Fueloep, J. C. Thomas, J. Mrazek, B. Bastin, G. F. Grinyer, F. Azaiez, M. Stanoiu, S. Grévy, C. N. Timis, D. Guillemaud-Mueller, Dóra Sohler, G. Sletten, F. Negoita, M. G. Saint-Laurent, Heiko Hergert, M. Lewitowicz, H. Savajols, L. Gaudefroy, Achim Schwenk, János Timár, Marie-Geneviève Porquet, F. Rotaru, Zs. Dombrádi, Zs. Podolyák, C. Borcea, A. Lepailleur, F. De Oliveira, R. Borcea, L. Caceres, Andras Kerek, S. M. Lukyanov, Ch. Bourgeois, B. A. Brown, A. Krasznahorkay, O. Sorlin, Zs. Vajta, Z. Elekes, P. Roussel-Chomaz, Scott Bogner, F. Ibrahim, Yu. E. Penionzhkevich, 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), National Institut for Nuclear Physics and Engineering (IFIN HH), National Institut for Nuclear Physics and Engineering, National Superconducting Cyclotron Laboratory (NSCL), Michigan State University [East Lansing], Michigan State University System-Michigan State University System, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), TRIUMF [Vancouver], Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Flerov Laboratory of Nuclear Reactions [Dubna] (FLNR), Joint Institute for Nuclear Research (JINR), University of Surrey (UNIS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Niels Bohr Institute [Copenhagen] (NBI), Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), GANILEXP, 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), 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), and University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)
Subjects: Nuclear and High Energy Physics, Nuclear Theory, Astrophysics::High Energy Astrophysical Phenomena, SHELL model, FOS: Physical sciences, Fizikai tudományok, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Nuclear Theory (nucl-th), Fragmentation (mass spectrometry), Természettudományok, 0103 physical sciences, medicine, Nuclear Experiment (nucl-ex), 010306 general physics, Spectroscopy, Nuclear Experiment, Nuclear theory, Physics, 21.60.Cs, 23.20.Lv, 27.40.+z, 010308 nuclear & particles physics, Nuclear structure, Beta decay, medicine.anatomical_structure, Atomic physics, Nucleus
Abstract: The structure of the $^{24}$F nucleus has been studied at GANIL using the $\beta$ decay of $^{24}$O and the in-beam $\gamma$-ray spectroscopy from the fragmentation of projectile nuclei. Combining these complementary experimental techniques, the level scheme of $^{24}$F has been constructed up to 3.6 Mev by means of particle-$\gamma$ and particle-$\gamma\gamma$ coincidence relations. Experimental results are compared to shell-model calculations using the standard USDA and USDB interactions as well as ab-initio valence-space Hamiltonians calculated from the in-medium similarity renormalization group based on chiral two- and three-nucleon forces. Both methods reproduce the measured level spacings well, and this close agreement allows unidentified spins and parities to be consistently assigned., Comment: 5 figures, 2 tables
Published: 2015
Full Text: View/download PDF

38. Properties of low-lying intruder states in 34Al and 34Si populated in the beta-decay of 34Mg

Author: R. Lica, R. Borcea, Thierry Stora, F. Negoita, R. Mărginean, D. Pietreanu, Ph. Desagne, A. Negret, I. Stefan, C. Mihai, S. Calinescu, D. Ghita, D. M. Filipescu, T. Sava, C. Borcea, L. M. Fraile, I. Kuti, S. Grévy, S. Franchoo, P. Morel, C. A. Ur, R. Suvaila, M. Stanoiu, F. Rotaru, S. Toma, J. Mrazek, J. M. Daugas, N. Marginean, Ioana Gheorghe, D. Sohler, and P. Mourface
Subjects: Island of inversion, Chemistry, Excited state, Gamma spectroscopy, Isotopes of silicon, Atomic physics, Spectroscopy, Beta decay, Isotopes of magnesium, Radioactive decay
Abstract: The results of the IS530 experiment at ISOLDE revealed new information concerning several nuclei close to the N ≈ 20 'Island of Inversion' - 34Mg, 34Al, 34Si. The half-life of 34Mg was found to be three times larger than the adopted value (63(1) ms instead of 20(10) ms). The beta-gamma spectroscopy of 34Mg performed for the first time in this experiment, led to the first experimental level scheme for 34Al, also showing that the full beta strength goes through the predicted 1+ isomer in 34Al [1] and/or excited states that deexcite to it. The subsequent beta-decay of the 1+ isomer in 34Al allowed the observation of new gamma lines in 34Si, (tentatively) associated with low-spin high-energy excited states previously unobserved.
Published: 2015
Full Text: View/download PDF

39. Yields of neutron-rich rubidium and cesium isotopes from fast-neutron induced fission of 238U, obtained by studying their release from a thick ISOL target

Author: Ulli Köster, L. Stroe, A. Joinet, Karl Kratz, M. Ducourtieux, L.B. Tecchio, C. Donzaud, F. Ibrahim, R. Borcea, C. Bourgeois, K. Peräjärvi, O. Bajeat, B. Roussière, C. Lau, B. Pfeiffer, D. Guillemaud-Mueller, O. Perru, J. Lettry, A.C. Mueller, F. Hosni, E. Fioretto, G. Prete, J. Sauvage, H. Lefort, S. Essabaa, and G. Lhersonneau
Subjects: Nuclear and High Energy Physics, Cesium Isotopes, chemistry, Isotope, Fission, Caesium, Radiochemistry, chemistry.chemical_element, Neutron, Instrumentation, Isotopes of caesium, Rubidium
Abstract: In the framework of the EURISOL project, the production of neutron-rich isotopes of rubidium and cesium has been studied. The intensities of mass-separated beams of rubidium and cesium isotopes generated from a thick 238 UC x target connected to a surface ionizer have been measured. The release properties of 140 Cs and 91 Rb have been investigated. The obtained results allowed us to determine the relative fission yields of rubidium and cesium isotopes with high accuracy.
Published: 2006
Full Text: View/download PDF

40. Recent developments at the GSI Online Mass Separator

Author: E. Roeckl, K.-H. Schmidt, C. Mazzocchi, Z. Janas, R. Kirchner, J. Döring, H. Grawe, M. Górska, M. La Commara, K. Burkard, W. Hüller, R. Borcea, Schmidt, K, Borcea, R, Burkard, K, Doring, J, Gorska, M, Grawe, H., Huller, W, Janas, Z, Kirchner, R, LA COMMARA, Marco, Mazzocchi, C, and Roeckl, E.
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Valley of stability, Separator (oil production), Experimental methods
Abstract: The research programme at the GSI Online Mass Separator focuses on the study of exotic nuclei far from the valley of stability. Special emphasis is placed on the investigation of decay properties of isotopes along the N = Z line between the double shell closures at 56 Ni and 100 Sn. In this contribution, the major recent achievements along with the corresponding experimental methods are reviewed.
Published: 2002
Full Text: View/download PDF

41. Probing nuclear forces beyond the drip-line using the mirror nuclei N16 and F16

Author: M. Lenhardt, Thomas Davinson, Vincent Tatischeff, I. Stefan, S. Grévy, F. de Grancey, J. C. Thomas, Marek Ploszajczak, J. Mrazek, M. Stanoiu, R. Borcea, C. Stodel, J. C. Angelique, M. G. Pellegriti, M. G. Saint Laurent, I. Ray, O. Roig, M. Lewitowicz, F. de Oliveira Santos, J. M. Daugas, M. Fadil, G. Dumitru, M. Angélique, Jürgen Kiener, A. Lefebvre-Schuhl, C. Borcea, A. Buta, D. Pantelica, F. Negoita, L. Perrot, E. Berthoumieux, and O. Sorlin
Subjects: Elastic scattering, Physics, Nuclear and High Energy Physics, Nuclear Theory, Nuclear force, Neutron, Symmetry breaking, Mirror nuclei, Atomic physics, Nuclear Experiment
Abstract: Radioactive beams of $^{14}\mathrm{O}$ and $^{15}\mathrm{O}$ were used to populate the resonant states ${1/2}^{+}$, ${5/2}^{+}$ and ${0}^{\ensuremath{-}},{1}^{\ensuremath{-}},{2}^{\ensuremath{-}}$ in the unbound $^{15}\mathrm{F}$ and $^{16}\mathrm{F}$ nuclei, respectively, by means of proton elastic scattering reactions in inverse kinematics. Based on their large proton spectroscopic factor values, the resonant states in $^{16}\mathrm{F}$ can be viewed as a core of $^{14}\mathrm{O}$ plus a proton in the $2{s}_{1/2}$ or $1{d}_{5/2}$ shell and a neutron in $1{p}_{1/2}$. Experimental energies were used to derive the strength of the $2{s}_{1/2}$-$1{p}_{1/2}$ and $1{d}_{5/2}$-$1{p}_{1/2}$ proton-neutron interactions. It is found that the former changes by 40% compared with the mirror nucleus $^{16}\mathrm{N}$, and the latter changes by 10%. This apparent symmetry breaking of the nuclear force between mirror nuclei finds explanation in the role of the large coupling to the continuum for the states built on an $\ensuremath{\ell}=0$ proton configuration.
Published: 2014
Full Text: View/download PDF

42. Single-particle strength in neutron-rich $^{71}$Cu from the (d, $^{3}$He) proton pick-up reaction

Author: M. Stanoiu, F. Azaiez, G. Marquínez-Durán, A. Gillibert, P. Morfouace, S. Franchoo, J. A. Scarpaci, C. Louchart, D. Mengoni, D. Sohler, I. Matea, Zsolt Dombrádi, L. Nalpas, J. C. Thomas, Zs. Vajta, N. de Séréville, F. Hammache, S. Boissinot, F. Recchia, M. Assié, L. Caceres, D. R. Napoli, R. Borcea, A. M. Sánchez-Benítez, S. Grévy, B. Fernandez-Dominguez, S. Giron, O. Kamalou, I. Martel-Bravo, V. Lapoux, Didier Beaumel, A. Lepailleur, C. Stodel, Megumi Niikura, O. Sorlin, I. Stefan, L. Lefebvre, J. Elseviers, G. Burgunder, 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 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), 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 d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), GANILEXP, 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), and 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)
Subjects: Physics, History, Proton, Inverse kinematics, 010308 nuclear & particles physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Computer Science Applications, Education, Cross section (physics), Low energy, 0103 physical sciences, Particle, Neutron, Born approximation, Atomic physics, 010306 general physics, Nuclear Experiment
Abstract: Expérience GANIL/MUST2; International audience; We have measured the 72Zn(d, 3He) 71Cu proton pickup reaction in inverse kinematics at 38 MeV/u. A dedicated setup was developed to overcome the experimental challenges posed by the low cross section of the reaction and the low energy of the outgoing 3He particles. The excitation-energy spectrum was reconstructed and spectroscopic factors were obtained after analysis of the angular distributions in the finite-range Distorted-Wave Born Approximation (DWBA). The results show that unlike for the πf5/2 orbital, the πf7/2 single-particle strength is not appreciably affected by the addition of neutrons beyond N = 40.
Published: 2014
Full Text: View/download PDF

43. Production of very neutron-deficient isotopes near Sn via reactions involving light-particle and cluster emission

Author: P. Jarillo-Herrero, N. Belcari, J. Gomez del Campo, G. de Angelis, Claes Fahlander, Margareta Hellström, H. Grawe, M. Górska, Mario R. Romano, Filippo Terrasi, A. Gadea, K.-H. Schmidt, M. Rejmund, M. La Commara, M. Glogowski, Vincenzo Roca, Antonio D'Onofrio, R. Kirchner, E. Roeckl, K. P. Rykaczewski, and R. Borcea
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Isotope, Isotopes of cadmium, Isotopes of tin, Analytical chemistry, Nuclear fusion, Neutron, Alpha particle, Atomic physics, Nuclear Experiment, Charged particle
Abstract: The production of very neutron-deficient isotopes near 100Sn has been investigated by using on-line mass separation of evaporation residues produced by heavy-ion induced complete-fusion reactions. We measured the cross sections for 99Cd, 100In, 101Sn and 102In via 58Ni+58Ni fusion reactions followed by cluster emission, and via 58Ni+50Cr fusion reactions accompanied by evaporation of protons, neutrons or α particles. Both types of reactions yield similar cross sections for the production of exotic nuclei near 100Sn. The data are discussed in comparison with results obtained from statistical-model calculations.
Published: 2000
Full Text: View/download PDF

44. The GT resonance revealed in β+-decay using new experimental techniques

Author: P. Kleinheinz, Jürgen Gerl, M. Shibata, M. Górska, D. Cano-Ott, J. Szerypo, H. Grawe, E. Roeckl, M. Rejmund, M. Karny, O. Guilbaud, J. Blomqvist, J. Agramunt, R. Kirchner, W. Liu, Z. Janas, Z. Hu, K. Rykaczewski, R. Borcea, T. Martinez, Berta Rubio, A. Gadea, M. Gierlik, A. Płochocki, Margareta Hellström, F. Moroz, J. L. Tain, R. Collatz, V. Wittmann, Alejandro Algora, and L. Batist
Subjects: Physics, Nuclear and High Energy Physics, Nuclear magnetic resonance, Spectrometer, Physics::Instrumentation and Detectors, Detector, Cluster (physics), Resonance, High Energy Physics::Experiment, Nuclear Experiment, Absorption (electromagnetic radiation), Beta decay
Abstract: The GT beta decay of 150 Ho has been studied with a Total Absorption Spectrometer (TAS), with an array of 6 Euroball CLUSTER Ge detectors (the CLUSTER CUBE), and with an alpha detector. The three techniques complement each other. The results provide the first observation of an extremely sharp resonance in GT beta decay.
Published: 1999
Full Text: View/download PDF

45. Lifetimes of proton unstable states in 113I measured by the particle-X-ray coincidence technique

Author: E. Roeckl, F. V. Moroz, R. Borcea, C. Mazzocchi, A. Płochocki, Z. Janas, R. Kirchner, J. Żylicz, M. Karny, S. K. Mandal, J. Döring, M. Gierlik, M. La Commara, S. Orlov, L. Batist, Z., Jana, L., Batist, R., Borcea, J., Döring, M., Gierlik, M., Karny, R., Kirchner, LA COMMARA, Marco, S., Mandal, C., Mazzocchi, F., Moroz, S., Orlov, A., Płochocki, E., Roeckl, and J., Żylicz
Subjects: Physics, Nuclear and High Energy Physics, Spectrometer, Proton decay, Branching fraction, Electron capture, Hadron, Nuclear fusion, Atomic physics, Proton emission, Nuclear Experiment, Beta decay
Abstract: The β-delayed proton decay of 113Xe was investigated by means of a total absorption γ-ray spectrometer and a telescope for particle detection. The energy window available for the β-delayed proton decay of 113Xe and the relative branching ratios for proton transitions to the 112Te states were remeasured. The lifetimes of proton unstable 113I states populated in the electron capture decay of 113Xe were determined by means of the particle-X-ray coincidence technique. The results of the lifetime measurements are compared with statistical-model calculations.
Published: 2005

46. beta decay of 95Ag

Author: S. Harissopulos, J. Döring, K. Schmidt, C. Mazzocchi, R. Borcea, S. Galanopoulos, M. Górska, H. Grawe, M. Hellström, Z. Janas, R. Kirchner, E. Roeckl, I. P. Johnstone, R. Schwengner, L. D. Skouras, LA COMMARA, MARCO, S., Harissopulo, J., Döring, LA COMMARA, Marco, K., Schmidt, C., Mazzocchi, R., Borcea, S., Galanopoulo, M., Górska, H., Grawe, M., Hellström, Z., Jana, R., Kirchner, E., Roeckl, I. P., Johnstone, R., Schwengner, and L. D., Skouras
Published: 2005

47. Hindered E4 decay of the 52Fe 12+ yrast trap

Author: A. Gadea, S. M. Lenzi, D. R. Napoli, M. Axiotis, C. Ur, G. Martinez Pinedo, M. Górska, E. Roeckl, E. Caurier, F. Nowacki, G. de Angelis, L. Batist, R. Borcea, F. Brandolini, D. Cano Ott, J. Döring, C. Fahlander, E. Farnea, H. Grawe, M. Hellström, Z. Janas, R. Kirchner, C. Mazzocchi, E. Nacher, C. Plettner, A. Płochocki, B. Rubio, K. Schmidt, R. Schwengner, J. L. Tain, J. Żylicz, LA COMMARA, MARCO, A., Gadea, S. M., Lenzi, D. R., Napoli, M., Axioti, C., Ur, G., Martinez Pinedo, M., Górska, E., Roeckl, E., Caurier, F., Nowacki, G., de Angeli, L., Batist, R., Borcea, F., Brandolini, D., Cano Ott, J., Döring, C., Fahlander, E., Farnea, H., Grawe, M., Hellström, Z., Jana, R., Kirchner, LA COMMARA, Marco, C., Mazzocchi, E., Nacher, C., Plettner, A., Płochocki, B., Rubio, K., Schmidt, R., Schwengner, J. L., Tain, and J., Żylicz
Published: 2005

48. Evidence for a high-spin β-decaying isomer in Lu177

Author: Sareh Al Garni, P. Regan, P. Walker, E. Roeckl, R. Kirchner, F. Xu, L. Batist, A. Blazhev, R. Borcea, D. Cullen, J. Döring, H. El Masri, J. Garces Narro, H. Grawe, C. Mazzocchi, I. Mukha, C. Pearson, C. Plettner, K. Schmidt, W. D. Schmidt Ott, Y. Shimbara, C. Wheldon, R. Wood, S. Wooding, LA COMMARA, MARCO, Sareh Al, Garni, P., Regan, P., Walker, E., Roeckl, R., Kirchner, F., Xu, L., Batist, A., Blazhev, R., Borcea, D., Cullen, J., Döring, H., El Masri, J., Garces Narro, H., Grawe, LA COMMARA, Marco, C., Mazzocchi, I., Mukha, C., Pearson, C., Plettner, K., Schmidt, W. D., Schmidt Ott, Y., Shimbara, C., Wheldon, R., Wood, and S., Wooding
Published: 2004

49. Isomerism in 96Ag and non-yrast levels in 96Pd and 95Rh, studied in β decay

Author: K. Schmidt, B. Salvachúa, E. Roeckl, R. Borcea, C. Mazzocchi, Z. Janas, M. La Commara, L. D. Skouras, R. Kirchner, F. V. Moroz, A. Płochocki, I.P. Johnstone, L. Batist, K. Hauschild, C. Plettner, J. Pavan, M. Karny, Ronald Schwengner, C. R. Bingham, S. L. Tabor, M. Kavatsyuk, M. Gierlik, Ivan Mukha, J. Döring, M. Wiedeking, H. Grawe, L., Batist, J., Döring, I., Mukha, C., Plettner, C. R., Bingham, R., Borcea, M., Gierlik, H., Grawe, K., Hauschild, Z., Jana, I. P., Johnstone, M., Karny, M., Kavatsyuk, R., Kirchner, LA COMMARA, Marco, C., Mazzocchi, F., Moroz, J., Pavan, A., Płochocki, E., Roeckl, B., Salvachúa, K., Schmidt, R., Schwengner, L. D., Skoura, S. L., Tabor, and M., Wiedeking
Subjects: Physics, Nuclear and High Energy Physics, Positron, Proton, Excited state, Yrast, Nuclear structure, Atomic physics, Ground state, Beta decay, Excitation
Abstract: The β decay of 96Ag (Z=47,N=49) was investigated by measuring positrons, X rays as well as β-delayed protons and γ rays. The γ radiation was studied by means of germanium detectors and a NaI total-absorption spectrometer. Two β-decaying isomers in 96Ag were established with half-lives of 4.40(6) and 6.9(6) s and tentative spin–parity assignments of (8+) and (2+), respectively. For both isomers, the intensities of β transitions to low-lying levels of 96Pd (Z=46,N=50) and β-delayed proton decays to levels in 95Rh (Z=45,N=50) were measured. Several new 96Pd levels were firmly established. The level energies, their γ decays and the Gamow–Teller decay of 96Ag are compared to shell-model predictions. A new low-lying level in 95Rh was found at 680 keV excitation energy. Through a comparison with low-lying states of N=50 isotones, this level is interpreted as the first excited 7/2+ state built on the proton 9/2+ ground state. The assignments of further excited states in 95Rh are discussed.
Published: 2003

50. Identification of isomers in the N=Z+1 nucleus 95Ag

Author: J. Döring, H. Grawe, K. Schmidt, R. Borcea, S. Galanopoulos, M. Górska, S. Harissopulos, M. Hellström, Z. Janas, R. Kirchner, C. Mazzocchi, E. Roeckl, R. Schwengner, LA COMMARA, MARCO, J., Döring, H., Grawe, K., Schmidt, R., Borcea, S., Galanopoulo, M., Górska, S., Harissopulo, M., Hellström, Z., Jana, R., Kirchner, LA COMMARA, Marco, C., Mazzocchi, E., Roeckl, and R., Schwengner
Published: 2003

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Database

Publisher

120 results on '"R. .. Borcea"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources