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1. Mirror nucleon-transfer reactions from $^{18}$Ne and $^{18}$O

Author

Flavigny, F., Keeley, N., Gillibert, A., Lapoux, V., Lemasson, A., Audirac, L., Bastin, B., Boissinot, S., Caccitti, J., Corsi, A., Damoy, S., Franchoo, S., Gangnant, P., Gibelin, J., Goupil, J., Hammache, F., Houarner, C., Jacquot, B., Lebertre, G., Legeard, L., Ménager, L., Morel, V., Morfouace, P., Pancin, J., Pollacco, E. C., Rejmund, M., Roger, T., Saillant, F., and Sénoville, M.

Subjects
Nuclear Experiment
Abstract

The $^{18}$Ne(d,t)$^{17}$Ne and $^{18}$Ne(d,$^3$He)$^{17}$F single-nucleon pickup reactions were measured at 16.5 MeV/nucleon in inverse kinematics together with elastic and inelastic scattering channels. The full set of measured exclusive differential cross sections was compared with the mirror reaction channels on stable $^{18}$O after consistent reanalysis using coupled reaction channels calculations. Within this interpretation scheme, most of the spectroscopic factors extracted for the population of unbound states in $^{17}$F match within uncertainties with their mirror partners in $^{17}$O. However, for the deeply-bound neutron removal channel to $^{17}$Ne, a significant symmetry breaking with the mirror proton-removal channel leading to $^{17}$N is evidenced by an overall single-particle strength reduction.

Published
2024
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2. Particle Identification at VAMOS++ with Machine Learning Techniques

Author

Cho, Y., Kim, Y. H., Choi, S., Park, J., Bae, S., Hahn, K. I., Son, Y., Navin, A., Lemasson, A., Rejmund, M., Ramos, D., Ackermann, D., Utepov, A., Fourgeres, C., Thomas, J. C., Goupil, J., Fremont, G., de France, G., Watanabe, Y. X., Hirayama, Y., Jeong, S., Niwase, T., Miyatake, H., Schury, P., Rosenbusch, M., Chae, K., Kim, C., Kim, S., Gu, G. M., Kim, M. J., John, P., Andreyev, A. N., Korten, W., Recchia, F., de Angelis, G., Vidal, R. M. Pérez, Rezynkina, K., Ha, J., Didierjean, F., Marini, P., Treasa, D., Tsekhanovich, I., Dudouet, J., Bhattacharyya, S., Mukherjee, G., Banik, R., Bhattacharya, S., and Mukai, M.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Multi-nucleon transfer reaction between 136Xe beam and 198Pt target was performed using the VAMOS++ spectrometer at GANIL to study the structure of n-rich nuclei around N=126. Unambiguous charge state identification was obtained by combining two supervised machine learning methods, deep neural network (DNN) and positional correction using a gradient-boosting decision tree (GBDT). The new method reduced the complexity of the kinetic energy calibration and outperformed the conventional method, improving the charge state resolution by 8%

Published
2023
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3. Search for $^{22}$Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Author

Fougères, C., Santos, F. de Oliveira, José, J., Michelagnoli, C., Clément, E., Kim, Y. H., Lemasson, A., Guimaraes, V., Barrientos, D., Bemmerer, D., Benzoni, G., Boston, A. J., Bottger, R., Boulay, F., Bracco, A., Celikovic, I., Cederwall, B., Ciemala, M., Delafosse, C., Domingo-Pardo, C., Dudouet, J., Eberth, J., Fulop, Z., Gonzalez, V., Goupil, J., Hess, H., Jungclaus, A., Kaskas, A., Korichi, A., Lenzi, S. M., Leoni, S., Li, H., Ljungvall, J., Lopez-Martens, A., Menegazzo, R., Mengoni, D., Million, B., Mrazek, J., Napoli, D. R., Navin, A., Nyberg, J., Podolyak, Zs., Pullia, A., Quintana, B., Ralet, D., Redon, N., Reiter, P., Rezynkina, K., Saillant, F., Salsac, M. D., Sanchez-Benitez, A. M., Sanchis, E., Senyigit, M., Siciliano, M., Smirnova, N. A., Sohler, D., Stanoiu, M., Theisen, Ch., Valiente-Dobon, J. J., Ujic, P., and Zielinska, M.

Subjects
Nuclear Experiment, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

Classical novae are thermonuclear explosions in stellar binary systems, and important sources of $^{26}$Al and $^{22}$Na. While gamma rays from the decay of the former radioisotope have been observed throughout the Galaxy, $^{22}$Na remains untraceable. The half-life of $^{22}$Na (2.6 yr) would allow the observation of its 1.275 MeV gamma-ray line from a cosmic source. However, the prediction of such an observation requires good knowledge of the nuclear reactions involved in the production and destruction of this nucleus. The $^{22}$Na($p,\gamma$)$^{23}$Mg reaction remains the only source of large uncertainty about the amount of $^{22}$Na ejected. Its rate is dominated by a single resonance on the short-lived state at 7785.0(7) keV in $^{23}$Mg. In the present work, a combined analysis of particle-particle correlations and velocity-difference profiles is proposed to measure femtosecond nuclear lifetimes. The application of this novel method to the study of the $^{23}$Mg states, combining magnetic and highly-segmented tracking gamma-ray spectrometers, places strong limits on the amount of $^{22}$Na produced in novae, explains its non-observation to date in gamma rays (flux < 2.5x$10^{-4}$ ph/(cm$^2$s)), and constrains its detectability with future space-borne observatories., Comment: 18 pages, 3 figures, 1 table

Published
2022
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4. $^{178}$Hg and asymmetric fission of neutron-deficient pre-actinides

Author

Jhingan, A., Schmitt, C., Lemasson, A., Biswas, S., Kim, Y. H., Ramos, D., Andreyev, A. N., Curien, D., Ciemala, M., Clément, E., Dorvaux, O., De Canditiis, B., Didierjean, F., Duchêne, G., Dudouet, J., Frankland, J., Frémont, G., Goupil, J., Jacquot, B., Raison, C., Ralet, D., Retailleau, B. -M., Stuttgé, L., Tsekhanovich, I., Andreev, A. V., Goriely, S., Hilaire, S., Lemaître, J-F., Möller, P., and Schmidt, K. -H.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

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

Published
2022
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5. Narrow resonances in the continuum of the unbound nucleus $^{15}$F

Author

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

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The structure of the unbound $^{15}$F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive $^{14}$O beam impinging on a CH$_2$ target. The analysis of $^{1}$H($^{14}$O,p)$^{14}$O and $^{1}$H($^{14}$O,2p)$^{13}$N reactions allowed the confirmation of the previously observed narrow $1/2^{-}$ resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2$^{-}$ and 3/2$^{-}$ resonances. The newly observed levels decay by 1p emission to the ground of $^{14}$O, and by sequential 2p emission to the ground state (g.s.) of $^{13}$N via the $1^-$ resonance of $^{14}$O. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2$^{-}$ and 3/2$^{-}$ resonances may be collectivized by the continuum coupling to nearby 2p- and 1p- decay channels. The observed excitation function $^{1}$H($^{14}$O,p)$^{14}$O and resonance spectrum in $^{15}$F are well reproduced in the unified framework of the GSM., Comment: 7 pages, 4 figures

Published
2021

6. Evidence for enhanced neutron-proton correlations from the level structure of the $N=Z+1$ nucleus $^{87}_{43}$Tc$^{\ }_{44}$

Author

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

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The low-lying excited states in the neutron-deficient $N=Z+1$ nucleus $^{87}_{43}$Tc$^{\ }_{44}$ have been studied via the fusion-evaporation reaction $^{54}$Fe($^{36}$Ar, $2n1p$)$^{87}$Tc at the Grand Acc\'el\'erateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt $\gamma$-rays, neutrons, and charged particles emitted in the reaction. A level scheme of $^{87}$Tc from the (9/2$^{+}_{g.s.}$) state to the (33/2$^{+}_{1}$) state was established based on 6 mutually coincident $\gamma$-ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at $\hbar\omega\approx 0.50$ MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around $N=44$ is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the $N=Z$ line.

Published
2021

7. HeCTOr: the $^3$He Cryogenic Target of Orsay for direct nuclear reactions with radioactive beams

Author

Galtarossa, F., Pierens, M., Assié, M., Delpech, V., Galet, F., Saugnac, H., Brugnara, D., Ramos, D., Beaumel, D., Blache, P., Chabot, M., Chatelet, F., Clément, E., Flavigny, F., Giret, A., Gottardo, A., Goupil, J., Lemasson, A., Matta, A., Ménager, L., and Rindel, E.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Direct nuclear reactions with radioactive ion beams represent an extremely powerful tool to extend the study of fundamental nuclear properties far from stability. These measurements require pure and dense targets to cope with the low beam intensities. The $^3$He cryogenic target HeCTOr has been designed to perform direct nuclear reactions in inverse kinematics. The high density of $^3$He scattering centers, of the order of 10$^{20}$ atoms/cm$^2$, makes it particularly suited for experiments where low-intensity radioactive beams are involved. The target was employed in a first in-beam experiment, where it was coupled to state-of-the-art gamma-ray and particle detectors. It showed excellent stability in gas temperature and density over time. Relevant experimental quantities, such as total target thickness, energy resolution and gamma-ray absorption, were determined through dedicated Geant4 simulations and found to be in good agreement with experimental data., Comment: 12 pages, 10 figures

Published
2021
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8. The MUGAST-AGATA-VAMOS campaign : set-up and performance

Author

Assié, M., Clément, E., Lemasson, A., Ramos, D., Raggio, A., Zanon, I., Galtarossa, F., Lenain, C., Casal, J., Flavigny, F., Matta, A., Mengoni, D., Beaumel, D., Blumenfeld, Y., Borcea, R., Brugnara, D., Catford, W., de Oliveira, F., De Séréville, N., Didierjean, F., Diget, C. Aa., Dudouet, J., Fernandez-Dominguez, B., Fougères, C., Frémont, G., Girard-Alcindor, V., Giret, A., Goasduff, A., Gottardo, A., Goupil, J., Hammache, F., John, P. R., Korichi, A., Lalanne, L., Leblond, S., Lefevre, A., Legruel, F., Menager, L., Million, B., Nicolle, C., Noury, F., Rauly, E., Rezynkina, K., Rindel, E., Rojo, J. S., Siciliano, M., Stanoiu, M., Stefan, I., and Vatrinet, L.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
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
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9. Prompt-delayed $\gamma$-ray spectroscopy of neutron-rich $^{119,121}$In isotopes

Author

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

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The fusion and transfer induced fission reaction $^{9}$Be($^{238}$U,~f) with 6.2 MeV/u beam energy, using a unique setup consisting of AGATA, VAMOS++ and EXOGAM detectors, was used to populate through the fission process and study the neutron-rich $^{119,121}$In isotopes. This setup enabled the prompt-delayed $\gamma$-ray spectroscopy of isotopes in the time range of $100~\rm{ns} - 200~\mu\rm{s}$. In the odd-$A$ $^{119,121}$In isotopes, indications of a short half-life $19/2^{-}$ isomeric state, in addition to the previously known $25/2^{+}$ isomeric state, were observed from the present data. Further, new prompt transitions above the $25/2^{+}$ isomer in $^{121}$In were identified along with reevaluation of its half-life. The experimental data were compared with the theoretical results obtained in the framework of large-scale shell-model calculations in a restricted model space. The $\langle \pi g_{9/2} \nu h_{11/2};I \arrowvert \hat{\mathcal{H}}\arrowvert \pi g_{9/2} \nu h_{11/2};I\rangle$ two-body matrix elements of residual interaction were modified to explain the excitation energies and the $B(E2)$ transition probabilities in the neutron-rich In isotopes. The (i) decreasing trend of $E(29/2^{+}) - E(25/2^{+})$ in odd-In (with dominant configuration $\pi g_{9/2}^{-1}\nu h_{11/2}^{-2}$ and maximum aligned spin of $29/2^{+}$) and (ii) increasing trend of $E(27/2^{+}) - E(23/2^{+})$ in odd-Sb (with dominant configuration $\pi g_{7/2}^{+1}\nu h_{11/2}^{-2}$ and maximum aligned spin of $27/2^{+}$) with increasing neutron number could be understood as a consequence of hole-hole and particle-hole interactions, respectively., Comment: Accepted for publication in Phys. Rev. C

Published
2020
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10. Testing ab initio nuclear structure in neutron-rich nuclei: lifetime measurements of second 2+ states in 16C and 20O

Author

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

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2+ state in neutron-rich 20O, tau(2+_2 ) = 150(+80-30) fs, and an estimate for the lifetime of the second 2+ state in 16C have been obtained, for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds femtoseconds range, by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction 18O (7.0 MeV/u) + 181Ta. The requested sensitivity could only be reached owing to the excellent performances of the AGATA gamma-tracking array, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The experimental lifetimes agree with predictions of ab initio calculations using two- and three-nucleon interactions, obtained with the valence-space in-medium similarity renormalization group for 20O, and with the no-core shell model for 16C. The present measurement shows the power of electromagnetic observables, determined with high-precision gamma spectroscopy, to assess the quality of first-principles nuclear structure calculations, complementing common benchmarks based on nuclear energies. The proposed experimental approach will be essential for short lifetimes measurements in unexplored regions of the nuclear chart, including r-process nuclei, when intense ISOL-type beams become available.

Published
2020
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11. Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich $^{122-131}$Sb$_{51}$ isotopes

Author

Biswas, S., Lemasson, A., Rejmund, M., Navin, A., Kim, Y. H., Michelagnoli, C., Stefan, I., Banik, R., Bednarczyk, P., Bhattacharya, S., Bhattacharyya, S., Clément, E., Crawford, H. L., de France, G., Fallon, P., Frémont, G., Goupil, J., Jacquot, B., Li, H. J., Ljungvall, J., Maj, A., Ménager, L., Morel, V., Palit, R., Pérez-Vidal, R. M., Ropert, J., Barrientos, D., Benzoni, G., Birkenbach, B., Boston, A. J., Boston, H. C., Cederwall, B., Collado, J., Cullen, D. M., Désesquelles, P., Domingo-Pardo, C., Dudouet, J., Eberth, J., Gonzalez, V., Harkness-Brennan, L. J., Hess, H., Jungclaus, A., Korten, W., Labiche, M., Lefevre, A., Menegazzo, R., Mengoni, D., Million, B., Napoli, D. R., Pullia, A., Quintana, B., Ralet, D., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Stezowski, O., Theisen, Ch., Valiente-Dobon, J. J., and Zielinska, M.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The neutron-rich $^{122-131}$Sb isotopes were produced as fission fragments in the reaction $^{9}$Be($^{238}$U,~f) with 6.2 MeV/u beam energy. An unique setup, consisting of AGATA, VAMOS++ and EXOGAM detectors, was used which enabled the prompt-delayed gamma-ray ($\gamma$) spectroscopy of fission fragments in the time range of 100 ns - 200 $\mu$s. New isomers, prompt and delayed transitions were established in the even-A $^{122-130}$Sb isotopes. In the odd-A $^{123-131}$Sb isotopes, new prompt and delayed $\gamma$-ray transitions were identified, in addition to the confirmation of the previously known isomers. The half-lives of the isomeric states and the $B(E2)$ transition probabilities of the observed transitions depopulating these isomers were extracted. The experimental data was compared with the theoretical results obtained in the framework of Large-Scale Shell-Model (LSSM) calculations in a restricted model space. Modifications of several components of the shell model interaction were introduced to obtain a consistent agreement with the excitation energies and the $B(E2)$ transition probabilities in neutron-rich Sn and Sb isotopes. The isomeric configurations in Sn and Sb were found to be relatively pure. Further, the calculations revealed that the presence of a single valence proton, mainly in the $g_{7/2}$ orbital in Sb isotopes, leads to significant mixing (due to the $\nu\pi$ interaction) of: (i) the neutron seniorities ($\upsilon_{\nu}$) and (ii) the neutron angular momentum ($I_{\nu}$). The above features have a weak impact on the excitation energies, but have an important impact on the $B(E2)$ transition probabilities. In addition, a constancy of the relative excitation energies irrespective of neutron seniority and neutron number in Sn and Sb was observed., Comment: 23 pages, 18 figures, 10 tables

Published
2019
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12. Prompt-delayed γ-ray spectroscopy of neutron-rich In119,121 isotopes

Author

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

Subjects
Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract

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

Published
2020

13. Prompt-delayed γ -ray spectroscopy of neutron-rich in 119,121 isotopes

Author

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

Abstract

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

Published
2020

15. Conceptual design of the AGATA 2[formula omitted] array at LNL

Author

Valiente-Dobón, J.J., Menegazzo, R., Goasduff, A., Agguiaro, D., Aguilera, P., Angelini, F., Balogh, M., Bazzacco, D., Benito, J., Benzoni, G., Bez, N., Bolognesi, M., Bottoni, S., Brugnara, D., Carollo, S., Cocconi, P., Cogo, A., Collado, J., Crespi, F.C.L., Ertoprak, A., Escudeiro, R., Galtarossa, F., Gamba, E.R., Gambalonga, A., Servín, B. Góngora, Gottardo, A., Gozzelino, A., Gulmini, M., Huang, Z., Marchi, T., Mengoni, D., Modanese, P., Napoli, D.R., Pellumaj, J., Pérez-Vidal, R.M., Pigliapoco, S., Pilotto, E., Ramina, L., Rampazzo, M., Raniero, W., Rebeschini, M., Rezynkina, K., Rosso, D., Scarcioffolo, M., Scarpa, D., Sedlák, M., Smith, R., Toniolo, N., Veronese, F., Volpe, V., Zago, L., Zanon, I., Zhang, G., Abels, R., Allegrini, M.L., Aufranc, C., Baulieu, G., Belkhiria, C., Benettoni, M., Benini, D., Bentley, M., Biasotto, M., Blaizot, M., Miquel, J. Blasco, Boiano, C., Boston, A., Boston, H., Boujrad, A., Bourgault, P., Bracco, A., Brambilla, S., Burrows, I., Camera, F., Capra, S., Capsoni, A., Cash, R., Civera, J.V., Clément, E., Coelli, S., Cordwell, M., Corradi, L., Coudert, S., De Angelis, G., De Ruvo, L., Debras, G., Del Fabbro, M., Diklić, J., Dosme, N., Duchene, G., Duclos, B., Dudouet, J., Eberth, J., Elloumi, S., Everett, C., Fantinel, S., Fillinger, M., Fioretto, E., Fransen, C., Gadea, A., Gibelin, L., González, V., Goupil, J., Görgen, C., Grant, A., Green, K., Ha, J., Hartnett, T., Henseler, K., Hess, H., Hirsch, R., Houarner, C., Jacob, J., Joannem, T., Judson, D.S., Karkour, N., Karolak, M., Kebbiri, M., Kieffer, J., Labiche, M., Lafay, X., Le Jeannic, P., Lefevre, A., Legay, E., Legruel, F., Lenzi, S., Leoni, S., Linget, D., Liptrot, M., López-Martens, A., Lotodé, A., Manara, L., Ménager, L., Mijatović, T., Million, B., Minarello, A., Montagnoli, G., Morrall, P., Mullacrane, I., Nyberg, J., Philippon, G., Polettini, M., Popieul, F., Pullia, A., Recchia, F., Reiter, P., Richardt, G., Rocchini, M., Roger, A., Saillant, F., Sanchis, E., Laskar, Md.S.R., Secci, G., Sigward, M.-H., Simpson, J., Solenne, N., Spee, F., Stefanini, A.M., Stézowski, O., Szilner, S., Templeton, N., Theisen, Ch., Thiel, S., Tomasi, F., Tzvetkov, S., Vigano, D., Viscione, E., Wieland, O., Wimmer, K., Wittwer, G., and Zielińska, M.

Published
2023
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16. Prompt-delayed γ-ray spectroscopy with AGATA, EXOGAM and VAMOS++

Author

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

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Nuclear and plasma physics, Particle and high energy physics, Synchrotrons and accelerators
Abstract

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

Published
2017

22. Paricle identification at VAMOS++ with machine learning techniques

Author

Cho, Y., primary, Kim, Y.H., additional, Choi, S., additional, Park, J., additional, Bae, S., additional, Hahn, K.I., additional, Son, Y., additional, Navin, A., additional, Lemasson, A., additional, Rejmund, M., additional, Ramos, D., additional, Ackermann, D., additional, Utepov, A., additional, Fourgeres, C., additional, Thomas, J.C., additional, Goupil, J., additional, Fremont, G., additional, de France, G., additional, Watanabe, Y.X., additional, Hirayama, Y., additional, Jeong, S., additional, Niwase, T., additional, Miyatake, H., additional, Schury, P., additional, Rosenbusch, M., additional, Chae, K., additional, Kim, C., additional, Kim, S., additional, Gu, G.M., additional, Kim, M.J., additional, John, P., additional, Andreev, A., additional, Korten, W., additional, Recchia, F., additional, Angelis, G. de, additional, Vidal, R. Perez, additional, Rezynkina, K., additional, Ha, J., additional, Didierjean, F., additional, Marini, P., additional, Treasa, D., additional, Tsekhanovich, I., additional, Dudouet, J., additional, Bhattacharyya, S., additional, Mukherjee, G., additional, Banik, R., additional, Bhattacharya, S., additional, and Mukai, M., additional

Published
2023
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23. Conceptual design of the AGATA [formula omitted] array at GANIL

Author

Clément, E., Michelagnoli, C., de France, G., Li, H.J., Lemasson, A., Barthe Dejean, C., Beuzard, M., Bougault, P., Cacitti, J., Foucher, J.-L., Fremont, G., Gangnant, P., Goupil, J., Houarner, C., Jean, M., Lefevre, A., Legeard, L., Legruel, F., Maugeais, C., Ménager, L., Ménard, N., Munoz, H., Ozille, M., Raine, B., Ropert, J.A., Saillant, F., Spitaels, C., Tripon, M., Vallerand, Ph., Voltolini, G., Korten, W., Salsac, M.-D., Theisen, Ch., Zielińska, M., Joannem, T., Karolak, M., Kebbiri, M., Lotode, A., Touzery, R., Walter, Ch., Korichi, A., Ljungvall, J., Lopez-Martens, A., Ralet, D., Dosme, N., Grave, X., Karkour, N., Lafay, X., Legay, E., Kojouharov, I., Domingo-Pardo, C., Gadea, A., Pérez-Vidal, R.M., Civera, J.V., Birkenbach, B., Eberth, J., Hess, H., Lewandowski, L., Reiter, P., Nannini, A., De Angelis, G., Jaworski, G., John, P., Napoli, D.R., Valiente-Dobón, J.J., Barrientos, D., Bortolato, D., Benzoni, G., Bracco, A., Brambilla, S., Camera, F., Crespi, F.C.L., Leoni, S., Million, B., Pullia, A., Wieland, O., Bazzacco, D., Lenzi, S.M., Lunardi, S., Menegazzo, R., Mengoni, D., Recchia, F., Bellato, M., Isocrate, R., Egea Canet, F.J., Didierjean, F., Duchêne, G., Baumann, R., Brucker, M., Dangelser, E., Filliger, M., Friedmann, H., Gaudiot, G., Grapton, J.-N., Kocher, H., Mathieu, C., Sigward, M.-H., Thomas, D., Veeramootoo, S., Dudouet, J., Stézowski, O., Aufranc, C., Aubert, Y., Labiche, M., Simpson, J., Burrows, I., Coleman-Smith, P.J., Grant, A., Lazarus, I.H., Morrall, P.S., Pucknell, V.F.E., Boston, A., Judson, D.S., Lalović, N., Nyberg, J., Collado, J., González, V., Kuti, I., Nyakó, B.M., Maj, A., and Rudigier, M.

Published
2017
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26. Conceptual design of the AGATA 2 pi array at LNL

Author

Valiente-Dobon, J. J., Menegazzo, R., Goasduff, A., Agguiaro, D., Aguilera, P., Angelini, F., Balogh, M., Bazzacco, D., Benito, J., Benzoni, G., Bez, N., Bolognesi, M., Bottoni, S., Brugnara, D., Carollo, S., Cocconi, P., Cogo, A., Collado, J., Crespi, F. C. L., Ertoprak, A., Escudeiro, R., Galtarossa, F., Gamba, E. R., Gambalonga, A., Gongora Servin, B., Gottardo, A., Gozzelino, A., Gulmini, M., Huang, Z., Marchi, T., Mengoni, D., Modanese, P., Napoli, D. R., Pellumaj, J., Perez-Vidal, R. M., Pigliapoco, S., Pilotto, E., Ramina, L., Rampazzo, M., Raniero, W., Rebeschini, M., Rezynkina, K., Rosso, D., Scarcioffolo, M., Scarpa, D., Sedlak, M., Smith, R., Toniolo, N., Veronese, F., Volpe, V., Zago, L., Zanon, I., Zhang, G., Abels, R., Allegrini, M. L., Aufranc, C., Baulieu, G., Belkhiria, C., Benettoni, M., Benini, D., Bentley, M., Biasotto, M., Blaizot, M., Miquel, J. Blasco, Boiano, C., Boston, A., Boston, H., Boujrad, A., Bourgault, P., Bracco, A., Brambilla, S., Burrows, I., Camera, F., Capra, S., Capsoni, A., Cash, R., Civera, J. V., Clement, E., Coelli, S., Cordwell, M., Corradi, L., Coudert, S., De Angelis, G., De Ruvo, L., Debras, G., Del Fabbro, M., Diklic, J., Dosme, N., Duchene, G., Duclos, B., Dudouet, J., Eberth, J., Elloumi, S., Everett, C., Fantinel, S., Fillinger, M., Fioretto, E., Fransen, C., Gadea, A., Gibelin, L., Gonzalez, V., Goupil, J., Goergen, C., Grant, A., Green, K., Ha, J., Hartnett, T., Henseler, K., Hess, H., Hirsch, R., Houarner, C., Jacob, J., Joannem, T., Judson, D. S., Karkour, N., Karolak, M., Kebbiri, M., Kieffer, J., Labiche, M., Lafay, X., Le Jeannic, P., Lefevre, A., Legay, E., Legruel, F., Lenzi, S., Leoni, S., Linget, D., Liptrot, M., Lopez-Martens, A., Lotode, A., Manara, L., Menager, L., Mijatovic, T., Million, B., Minarello, A., Montagnoli, G., Morrall, P., Mullacrane, I., Nyberg, Johan, Philippon, G., Polettini, M., Popieul, F., Pullia, A., Recchia, F., Reiter, P., Richardt, G., Rocchini, M., Roger, A., Saillant, F., Sanchis, E., Laskar, Md. S. R., Secci, G., Sigward, M. H., Simpson, J., Solenne, N., Spee, F., Stefanini, A. M., Stezowski, O., Szilner, S., Templeton, N., Theisen, Ch., Thiel, S., Tomasi, F., Tzvetkov, S., Vigano, D., Viscione, E., Wieland, O., Wimmer, K., Wittwer, G., Zielinska, M., Valiente-Dobon, J. J., Menegazzo, R., Goasduff, A., Agguiaro, D., Aguilera, P., Angelini, F., Balogh, M., Bazzacco, D., Benito, J., Benzoni, G., Bez, N., Bolognesi, M., Bottoni, S., Brugnara, D., Carollo, S., Cocconi, P., Cogo, A., Collado, J., Crespi, F. C. L., Ertoprak, A., Escudeiro, R., Galtarossa, F., Gamba, E. R., Gambalonga, A., Gongora Servin, B., Gottardo, A., Gozzelino, A., Gulmini, M., Huang, Z., Marchi, T., Mengoni, D., Modanese, P., Napoli, D. R., Pellumaj, J., Perez-Vidal, R. M., Pigliapoco, S., Pilotto, E., Ramina, L., Rampazzo, M., Raniero, W., Rebeschini, M., Rezynkina, K., Rosso, D., Scarcioffolo, M., Scarpa, D., Sedlak, M., Smith, R., Toniolo, N., Veronese, F., Volpe, V., Zago, L., Zanon, I., Zhang, G., Abels, R., Allegrini, M. L., Aufranc, C., Baulieu, G., Belkhiria, C., Benettoni, M., Benini, D., Bentley, M., Biasotto, M., Blaizot, M., Miquel, J. Blasco, Boiano, C., Boston, A., Boston, H., Boujrad, A., Bourgault, P., Bracco, A., Brambilla, S., Burrows, I., Camera, F., Capra, S., Capsoni, A., Cash, R., Civera, J. V., Clement, E., Coelli, S., Cordwell, M., Corradi, L., Coudert, S., De Angelis, G., De Ruvo, L., Debras, G., Del Fabbro, M., Diklic, J., Dosme, N., Duchene, G., Duclos, B., Dudouet, J., Eberth, J., Elloumi, S., Everett, C., Fantinel, S., Fillinger, M., Fioretto, E., Fransen, C., Gadea, A., Gibelin, L., Gonzalez, V., Goupil, J., Goergen, C., Grant, A., Green, K., Ha, J., Hartnett, T., Henseler, K., Hess, H., Hirsch, R., Houarner, C., Jacob, J., Joannem, T., Judson, D. S., Karkour, N., Karolak, M., Kebbiri, M., Kieffer, J., Labiche, M., Lafay, X., Le Jeannic, P., Lefevre, A., Legay, E., Legruel, F., Lenzi, S., Leoni, S., Linget, D., Liptrot, M., Lopez-Martens, A., Lotode, A., Manara, L., Menager, L., Mijatovic, T., Million, B., Minarello, A., Montagnoli, G., Morrall, P., Mullacrane, I., Nyberg, Johan, Philippon, G., Polettini, M., Popieul, F., Pullia, A., Recchia, F., Reiter, P., Richardt, G., Rocchini, M., Roger, A., Saillant, F., Sanchis, E., Laskar, Md. S. R., Secci, G., Sigward, M. H., Simpson, J., Solenne, N., Spee, F., Stefanini, A. M., Stezowski, O., Szilner, S., Templeton, N., Theisen, Ch., Thiel, S., Tomasi, F., Tzvetkov, S., Vigano, D., Viscione, E., Wieland, O., Wimmer, K., Wittwer, G., and Zielinska, M.

Abstract

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

Published
2023
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27. Data for publication in Nature Communications: Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Author

Fougères, C., Oliveira Santos, F., José, J., Michelagnoli, C., Clément, E., Kim, Y. H., Lemasson, A., Guimarães, V., Barrientos, D., (0000-0003-0470-8367) Bemmerer, D., Benzoni, G., Boston, A. J., Böttger, R., Boulay, F., Bracco, A., Celikovic, I., Cederwall, B., Ciemala, M., Delafosse, C., Domingo-Pardo, C., Dudouet, J., Eberth, J., Fülöp, Z., González, V., Gottardo, A., Goupil, J., Hess, H., Jungclaus, A., Kaskas, A., Korichi, A., Lenzi, S. M., Leoni, S., Li, H., Ljungvall, J., Lopez-Martens, A., Menegazzo, R., Mengoni, D., Million, B., Mrazek, J., Napoli, D. R., Navin, A., Nyberg, J., Podolyak, Z., Pullia, A., Quintana, B., Ralet, D., Redon, N., Reiter, P., Rezynkina, K., Saillant, F., Salsac, M. D., Sánchez-Benítez, A. M., Sanchis, E., Senyigit, M., Siciliano, M., Smirnova, N. A., Sohler, D., Stanoiu, M., Theisen, C., Valiente-Dobón, J. J., Ujic, P., Zielinska, M., Fougères, C., Oliveira Santos, F., José, J., Michelagnoli, C., Clément, E., Kim, Y. H., Lemasson, A., Guimarães, V., Barrientos, D., (0000-0003-0470-8367) Bemmerer, D., Benzoni, G., Boston, A. J., Böttger, R., Boulay, F., Bracco, A., Celikovic, I., Cederwall, B., Ciemala, M., Delafosse, C., Domingo-Pardo, C., Dudouet, J., Eberth, J., Fülöp, Z., González, V., Gottardo, A., Goupil, J., Hess, H., Jungclaus, A., Kaskas, A., Korichi, A., Lenzi, S. M., Leoni, S., Li, H., Ljungvall, J., Lopez-Martens, A., Menegazzo, R., Mengoni, D., Million, B., Mrazek, J., Napoli, D. R., Navin, A., Nyberg, J., Podolyak, Z., Pullia, A., Quintana, B., Ralet, D., Redon, N., Reiter, P., Rezynkina, K., Saillant, F., Salsac, M. D., Sánchez-Benítez, A. M., Sanchis, E., Senyigit, M., Siciliano, M., Smirnova, N. A., Sohler, D., Stanoiu, M., Theisen, C., Valiente-Dobón, J. J., Ujic, P., and Zielinska, M.

Abstract

https://u.ganil-spiral2.eu/10.26143/GANIL-2016-E710.html

Published
2023

28. UNEXPECTED RETURN TO THE OR IN ORTHOPAEDIC TRAUMA FRACTURE SURGERY

Author

Saiz, A., primary, Hideshima, K., additional, Haffner, M., additional, Rice, M., additional, Goupil, J., additional, VanderVoort, W., additional, Delman, C., additional, Hallare, J., additional, Choi, J., additional, Shieh, A., additional, Eastman, J., additional, Wise, B., additional, and Lee, M., additional

Published
2023
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29. Conceptual design of the AGATA 2π array at LNL

Author

Valiente-Dobón, J.J., primary, Menegazzo, R., additional, Goasduff, A., additional, Agguiaro, D., additional, Aguilera, P., additional, Angelini, F., additional, Balogh, M., additional, Bazzacco, D., additional, Benito, J., additional, Benzoni, G., additional, Bez, N., additional, Bolognesi, M., additional, Bottoni, S., additional, Brugnara, D., additional, Carollo, S., additional, Cocconi, P., additional, Cogo, A., additional, Collado, J., additional, Crespi, F.C.L., additional, Ertoprak, A., additional, Escudeiro, R., additional, Galtarossa, F., additional, Gamba, E.R., additional, Gambalonga, A., additional, Servín, B. Góngora, additional, Gottardo, A., additional, Gozzelino, A., additional, Gulmini, M., additional, Huang, Z., additional, Marchi, T., additional, Mengoni, D., additional, Modanese, P., additional, Napoli, D.R., additional, Pellumaj, J., additional, Pérez-Vidal, R.M., additional, Pigliapoco, S., additional, Pilotto, E., additional, Ramina, L., additional, Rampazzo, M., additional, Raniero, W., additional, Rebeschini, M., additional, Rezynkina, K., additional, Rosso, D., additional, Scarcioffolo, M., additional, Scarpa, D., additional, Sedlák, M., additional, Smith, R., additional, Toniolo, N., additional, Veronese, F., additional, Volpe, V., additional, Zago, L., additional, Zanon, I., additional, Zhang, G., additional, Abels, R., additional, Allegrini, M.L., additional, Aufranc, C., additional, Baulieu, G., additional, Belkhiria, C., additional, Benettoni, M., additional, Benini, D., additional, Bentley, M., additional, Biasotto, M., additional, Blaizot, M., additional, Miquel, J. Blasco, additional, Boiano, C., additional, Boston, A., additional, Boston, H., additional, Boujrad, A., additional, Bourgault, P., additional, Bracco, A., additional, Brambilla, S., additional, Burrows, I., additional, Camera, F., additional, Capra, S., additional, Capsoni, A., additional, Cash, R., additional, Civera, J.V., additional, Clément, E., additional, Coelli, S., additional, Cordwell, M., additional, Corradi, L., additional, Coudert, S., additional, De Angelis, G., additional, De Ruvo, L., additional, Debras, G., additional, Del Fabbro, M., additional, Diklić, J., additional, Dosme, N., additional, Duchene, G., additional, Duclos, B., additional, Dudouet, J., additional, Eberth, J., additional, Elloumi, S., additional, Everett, C., additional, Fantinel, S., additional, Fillinger, M., additional, Fioretto, E., additional, Fransen, C., additional, Gadea, A., additional, Gibelin, L., additional, González, V., additional, Goupil, J., additional, Görgen, C., additional, Grant, A., additional, Green, K., additional, Ha, J., additional, Hartnett, T., additional, Henseler, K., additional, Hess, H., additional, Hirsch, R., additional, Houarner, C., additional, Jacob, J., additional, Joannem, T., additional, Judson, D.S., additional, Karkour, N., additional, Karolak, M., additional, Kebbiri, M., additional, Kieffer, J., additional, Labiche, M., additional, Lafay, X., additional, Le Jeannic, P., additional, Lefevre, A., additional, Legay, E., additional, Legruel, F., additional, Lenzi, S., additional, Leoni, S., additional, Linget, D., additional, Liptrot, M., additional, López-Martens, A., additional, Lotodé, A., additional, Manara, L., additional, Ménager, L., additional, Mijatović, T., additional, Million, B., additional, Minarello, A., additional, Montagnoli, G., additional, Morrall, P., additional, Mullacrane, I., additional, Nyberg, J., additional, Philippon, G., additional, Polettini, M., additional, Popieul, F., additional, Pullia, A., additional, Recchia, F., additional, Reiter, P., additional, Richardt, G., additional, Rocchini, M., additional, Roger, A., additional, Saillant, F., additional, Sanchis, E., additional, Laskar, Md.S.R., additional, Secci, G., additional, Sigward, M.-H., additional, Simpson, J., additional, Solenne, N., additional, Spee, F., additional, Stefanini, A.M., additional, Stézowski, O., additional, Szilner, S., additional, Templeton, N., additional, Theisen, Ch., additional, Thiel, S., additional, Tomasi, F., additional, Tzvetkov, S., additional, Vigano, D., additional, Viscione, E., additional, Wieland, O., additional, Wimmer, K., additional, Wittwer, G., additional, and Zielińska, M., additional

Published
2023
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30. Hg178 and asymmetric fission of neutron-deficient pre-actinides

Author

Jhingan, A., primary, Schmitt, C., additional, Lemasson, A., additional, Biswas, S., additional, Kim, Y. H., additional, Ramos, D., additional, Andreyev, A. N., additional, Curien, D., additional, Ciemała, M., additional, Clément, E., additional, Dorvaux, O., additional, De Canditiis, B., additional, Didierjean, F., additional, Duchêne, G., additional, Dudouet, J., additional, Frankland, J., additional, Frémont, G., additional, Goupil, J., additional, Jacquot, B., additional, Raison, C., additional, Ralet, D., additional, Retailleau, B.-M., additional, Stuttgé, L., additional, Tsekhanovich, I., additional, Andreev, A. V., additional, Goriely, S., additional, Hilaire, S., additional, Lemaître, J.-F., additional, Möller, P., additional, and Schmidt, K.-H., additional

Published
2022
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31. Evidence for spherical-oblate shape coexistence in Tc87

Author

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

Published
2022
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32. Evidence of Partial Seniority Conservation in the πg9/2 Shell for the N=50 Isotones

Author

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

Published
2022
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33. New narrow resonances observed in the unbound nucleus F15

Author

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

Published
2022
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35. New narrow resonances observed in the unbound nucleus F 15

Author

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

Abstract

The structure of the unbound 15F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive 14O beam impinging on a CH2 target. The analysis of 1H(14O,p)14O and 1H(14O,2p)13N reactions allowed the confirmation of the previously observed narrow 1/2− resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2− and 3/2− resonances. The newly observed levels decay by 1p emission to the ground of 14O, and by sequential 2p emission to the ground state of 13N via the 1− resonance of 14O. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2− and 3/2− resonances may be collectivized by the continuum coupling to nearby 2p- and 1p-decay channels. The observed excitation function 1H(14O,p)14O and resonance spectrum in 15F are well reproduced in the unified framework of the GSM.

Published
2022

36. Evidence of Partial Seniority Conservation in the pi g9/2 Shell for the N=50 Isotones

Author

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

Abstract

The reduced transition probabilities for the 4+1 -2+1 and 2+1 -0+1 transitions in 92Mo and 94Ru and for the 4+1 -2+1 and 6+1 -4+1 transitions in 90Zr have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the f5=2, p3=2, p1=2, and g9=2 proton valence space. Only the combination of extensive lifetime information and large scale shell-model calculations allowed the extent of the seniority conservation in the N = 50 g9=2 orbital to be understood. The conclusion is that seniority is largely conserved in the first 71g9=2 orbital.

Published
2022
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37. Evidence for spherical-oblate shape coexistence in Tc-87

Author

Liu, X., Cederwall, B., Qi, C., Wyss, R. A., Aktas, O., Ertoprak, A., Zhang, W., Clement, E., de France, G., Ralet, D., Gadea, A., Goasduff, A., Jaworski, G., Kuti, I, Nyako, B. M., Nyberg, Johan, Palacz, M., Wadsworth, R., Valiente-Dobon, J. J., Al-Azri, H., Nyberg, A. Atac, Back, T., de Angelis, G., Doncel, M., Dudouet, J., Gottardo, A., Jurado, M., Ljungvall, J., Mengoni, D., Napoli, D. R., Petrache, C. M., Sohler, D., Timar, J., Barrientos, D., Bednarczyk, P., Benzoni, G., Birkenbach, B., Boston, A. J., Boston, H. C., Burrows, I, Charles, L., Ciemala, M., Crespi, F. C. L., Cullen, D. M., Desesquelles, P., Domingo-Pardo, C., Eberth, J., Erduran, N., Erturk, S., Gonzalez, V, Goupil, J., Hess, H., Huyuk, T., Jungclaus, A., Korten, W., Lemasson, A., Leoni, S., Maj, A., Menegazzo, R., Million, B., Perez-Vidal, R. M., Podolyak, Zs, Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Simpson, J., Stezowski, O., Theisen, C., Zielinska, M., Liu, X., Cederwall, B., Qi, C., Wyss, R. A., Aktas, O., Ertoprak, A., Zhang, W., Clement, E., de France, G., Ralet, D., Gadea, A., Goasduff, A., Jaworski, G., Kuti, I, Nyako, B. M., Nyberg, Johan, Palacz, M., Wadsworth, R., Valiente-Dobon, J. J., Al-Azri, H., Nyberg, A. Atac, Back, T., de Angelis, G., Doncel, M., Dudouet, J., Gottardo, A., Jurado, M., Ljungvall, J., Mengoni, D., Napoli, D. R., Petrache, C. M., Sohler, D., Timar, J., Barrientos, D., Bednarczyk, P., Benzoni, G., Birkenbach, B., Boston, A. J., Boston, H. C., Burrows, I, Charles, L., Ciemala, M., Crespi, F. C. L., Cullen, D. M., Desesquelles, P., Domingo-Pardo, C., Eberth, J., Erduran, N., Erturk, S., Gonzalez, V, Goupil, J., Hess, H., Huyuk, T., Jungclaus, A., Korten, W., Lemasson, A., Leoni, S., Maj, A., Menegazzo, R., Million, B., Perez-Vidal, R. M., Podolyak, Zs, Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Simpson, J., Stezowski, O., Theisen, C., and Zielinska, M.

Abstract

Excited states in the neutron-deficient nucleus Tc-87 have been studied via the fusion-evaporation reaction 54Fe(36Ar, 2n1p) Tc-87 at 115 MeV beam energy. The AGATA gamma-ray spectrometer coupled to the DIAMANT, NEDA, and Neutron Wall detector arrays for light-particle detection was used to measure the prompt coincidence of gamma rays and light particles. Six transitions from the deexcitation of excited states belonging to a new band in Tc-87 were identified by comparing gamma-ray intensities in the spectra gated under different reaction channel selection conditions. The constructed level structure was compared with the shell model and total Routhian surface calculations. The results indicate that the new band structure in 87Tc is built on a spherical configuration, which is different from that assigned to the previously identified oblate yrast rotational band.

Published
2022
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38. New narrow resonances observed in the unbound nucleus 15 F

Author

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

Abstract

The structure of the unbound 15F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive 14O beam impinging on a CH2 target. The analysis of 1H(14O,p)14O and 1H(14O,2p)13N reactions allowed the confirmation of the previously observed narrow 1/2− resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2− and 3/2− resonances. The newly observed levels decay by 1p emission to the ground of 14O, and by sequential 2p emission to the ground state of 13N via the 1− resonance of 14O. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2− and 3/2− resonances may be collectivized by the continuum coupling to nearby 2p- and 1p-decay channels. The observed excitation function 1H(14O,p)14O and resonance spectrum in 15F are well reproduced in the unified framework of the GSM.

Published
2022

39. 178Hg and asymmetric fission of neutron-deficient pre-actinides

Author

Jhingan, A., Schmitt, Christelle, Lemasson, Alban, Biswas, Sovan, Kim, Y.H., Ramos, D., Andreyev, Andrei, Curien, Dominique, Ciemała, M., Clément, E., Dorvaux, O., De Canditiis, B., Didierjean, F., Duchene, D., Dudouet, J, Frankland, J., Fremont, G., Goupil, J., Jacquot, B, Raison, C., Ralet, D., Retailleau, B.-M., Stuttge, Louise, Tsekhanovich, I., Andreev, A.V., Goriely, Stéphane, Hilaire, Stéphane, Lemaître, Jean-François, Moller, P., Schmidt, K.-H., Jhingan, A., Schmitt, Christelle, Lemasson, Alban, Biswas, Sovan, Kim, Y.H., Ramos, D., Andreyev, Andrei, Curien, Dominique, Ciemała, M., Clément, E., Dorvaux, O., De Canditiis, B., Didierjean, F., Duchene, D., Dudouet, J, Frankland, J., Fremont, G., Goupil, J., Jacquot, B, Raison, C., Ralet, D., Retailleau, B.-M., Stuttge, Louise, Tsekhanovich, I., Andreev, A.V., Goriely, Stéphane, Hilaire, Stéphane, Lemaître, Jean-François, Moller, P., and Schmidt, K.-H.

Abstract

Fission at low excitation energy is an ideal playground to probe the impact of nuclear structure on nucleardynamics. While the importance of structural effects in the nascent fragments is well established in the(trans-)actinide region, the observation of asymmetric fission in several neutron-deficient pre-actinides canbe explained by various mechanisms. To deepen our insight into that puzzle, an innovative approach basedon inverse kinematics and an enhanced version of the VAMOS++ heavy-ion spectrometer was implementedat the GANIL facility, Caen. Fission of 178Hg was induced by fusion of 124Xe and 54Fe. The two fragmentswere detected in coincidence using VAMOS++ supplemented with a new SEcond Detection arm. For the firsttime in the pre-actinide region, access to the pre-neutron mass and total kinetic energy distributions, and thesimultaneous isotopic identification of one the fission fragment, was achieved. The present work describes theexperimental approach, and discusses the pre-neutron observables in the context of an extended asymmetricfissionisland located southwest of 208Pb. A comparison with different models is performed, demonstrating theimportance of this new asymmetric-fission island for elaborating on driving effects in fission., info:eu-repo/semantics/published

Published
2022

40. Evidence for spherical-oblate shape coexistence in $^{87}\mathrm{Tc}$

Author

Liu, X, Cederwall, B, Qi, C, Wyss, R A, Aktas, Ö, Ertoprak, A, Zhang, W, Clément, E, de France, G, Ralet, D, Gadea, A, Goasduff, A, Jaworski, G, Kuti, I, Nyakó, B M, Nyberg, J, Palacz, M, Wadsworth, R, Valiente-Dobón, J J, Al-Azri, H, Nyberg, A Ataç, Bäck, T, de Angelis, G, Doncel, M, Dudouet, J, Gottardo, A, Jurado, M, Ljungvall, J, Mengoni, D, Napoli, D R, Petrache, C M, Sohler, D, Timár, J, Barrientos, D, Bednarczyk, P, Benzoni, G, Birkenbach, B, Boston, A J, Boston, H C, Burrows, I, Charles, L, Ciemala, M, Crespi, F C L, Cullen, D M, Désesquelles, P, Domingo-Pardo, C, Eberth, J, Erduran, N, Ertürk, S, González, V, Goupil, J, Hess, H, Huyuk, T, Jungclaus, A, Korten, W, Lemasson, A, Leoni, S, Maj, A, Menegazzo, R, Million, B, Perez-Vidal, R M, Podolyàk, Zs, Pullia, A, Recchia, F, Reiter, P, Saillant, F, Salsac, M D, Sanchis, E, Simpson, J, Stezowski, O, Theisen, C, Zielinska, M, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

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

International audience; Excited states in the neutron-deficient nucleus $^{87}$Tc have been studied via the fusion-evaporation reaction $^{54}$Fe($^{36}$Ar, 2$n$1p) $^{87}$Tc at 115 MeV beam energy. The AGATA γ -ray spectrometer coupled to the DIAMANT, NEDA, and Neutron Wall detector arrays for light-particle detection was used to measure the prompt coincidence of $\gamma$ rays and light particles. Six transitions from the deexcitation of excited states belonging to a new band in $^{87}$Tc were identified by comparing $\gamma$-ray intensities in the spectra gated under different reaction channel selection conditions. The constructed level structure was compared with the shell model and total Routhian surface calculations. The results indicate that the new band structure in $^{87}$Tc is built on a spherical configuration, which is different from that assigned to the previously identified oblate yrast rotational band.

Published
2022
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41. Evidence of Partial Seniority Conservation in the $\pi{g}_{9/2}$ Shell for the $N=50$ Isotones

Author

Perez-Vidal, Rm, Gadea, A, Domingo-Pardo, C, Gargano, A, Valiente-Dobon, Jj, Clement, E, Lemasson, A, Coraggio, L, Siciliano, M, Szilner, S, Bast, M, Braunroth, T, Collado, J, Corina, A, Dewald, A, Doncel, M, Dudouet, J, de France, G, Fransen, C, Gonzalez, V, Huyuk, T, Jacquot, B, John, Pr, Jungclaus, A, Kim, Yh, Korichi, A, Labiche, M, Lenzi, S, Li, H, Ljungvall, J, Lopez-Martens, A, Mengoni, D, Michelagnoli, C, Muller-Gatermann, C, Napoli, Dr, Navin, A, Quintana, B, Ramos, D, Rejmund, M, Sanchis, E, Simpson, J, Stezowski, O, Wilmsen, D, Zielinska, M, Boston, Aj, Barrientos, D, Bednarczyk, P, Benzoni, G, Birkenbach, B, Boston, Hc, Bracco, A, Cederwall, B, Cullen, Dm, Didierjean, F, Eberth, J, Gottardo, A, Goupil, J, Harkness-Brennan, Lj, Hess, H, Judson, Ds, Kaskas, A, Korten, W, Leoni, S, Menegazzo, R, Million, B, Nyberg, J, Podolyak, Z, Pullia, A, Ralet, D, Recchia, F, Reiter, P, Rezynkina, K, Salsac, Md, Senyigit, M, Sohler, D, Theisen, C, Verney, D, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Pluridisciplinaire Hubert Curien (IPHC), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Subatomär fysik, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Physics - Theory, Atom and Molecular Physics and Optics, Subatomic Physics, Atom- och molekylfysik och optik
Abstract

International audience; The reduced transition probabilities for the $4^+_1 \to 2^+_1$ and $2^+_1 \to 0^+_1$ transitions in $^{92}$Mo and $^{94}$Ru and for the $4^+_1 \to 2^+_1$ and $6^+_1 \to 4^+_1$ transitions in $^{90}$Zr have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the $f_{5/2}, p_{3/2}, p_{1/2},$ and $g_{9/2}$ proton valence space. Only the combination of extensive lifetime information and large scale shell-model calculations allowed the extent of the seniority conservation in the $N=50 g_{9/2}$ orbital to be understood. The conclusion is that seniority is largely conserved in the first $\pi{g}_{9/2}$ orbital.

Published
2022
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42. New narrow resonances observed in the unbound nucleus <math><mmultiscripts><mi mathvariant='normal'>F</mi><mprescripts/><none/><mn>15</mn></mmultiscripts></math>

Author

Girard-Alcindor, V., Mercenne, A., Stefan, I., de Oliveira Santos, F., Michel, N., Płoszajczak, M., Assié, M., Lemasson, A., Clément, E., Flavigny, F., Matta, A., Ramos, D., Rejmund, M., Dudouet, J., Ackermann, D., Adsley, P., Assunção, M., Bastin, B., Beaumel, D., Benzoni, G., Borcea, R., Boston, A.J., Cáceres, L., Cederwall, B., Celikovic, I., Chudoba, V., Ciemala, M., Collado, J., Crespi, F.C.L., d'Agata, G., de France, G., Delaunay, F., Diget, C., Domingo-Pardo, C., Eberth, J., Fougères, C., Franchoo, S., Galtarossa, F., Georgiadou, A., Gibelin, J., Giraud, S., González, V., Goyal, N., Gottardo, A., Goupil, J., Grévy, S., Guimaraes, V., Hammache, F., Harkness-Brennan, L.J., Hess, H., Oliver, D.S. Judson, Kamalou, O., Kameneyero, A., Kiener, J., Korten, W., Koyama, S., Labiche, M., Lalanne, L., Lapoux, V., Leblond, S., Lefevre, A., Lenain, C., Leoni, S., Li, H., Lopez-Martens, A., Maj, A., Matea, I., Menegazzo, R., Mengoni, D., Meyer, A., Million, B., Monteagudo, B., Morfouace, P., Mrazek, J., Niikura, M., Piot, J., Podolyak, Zs., Portail, C., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rezynkina, K., Roger, T., Rojo, J.S., Rotaru, F., Salsac, M.D., Benitez, A.M. Sánchez, Sanchis, E., Şenyigit, M., de Séréville, N., Siciliano, M., Simpson, J., Sohler, D., Sorlin, O., Stanoiu, M., Stodel, C., Suzuki, D., Theisen, C., Thomas, J.C., Ujic, P., Valiente-Dobón, J.J., Zielińska, M., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and ANR-17-CE31-0026,OASIS,Optimisation d'Agata pour la physique(2017)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; The structure of the unbound F15 nucleus is investigated using the inverse kinematics resonant scattering of a radioactive O14 beam impinging on a CH2 target. The analysis of H1(O14,p)O14 and H1(O14,2p)N13 reactions allowed the confirmation of the previously observed narrow 1/2− resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2− and 3/2− resonances. The newly observed levels decay by 1p emission to the ground of O14, and by sequential 2p emission to the ground state of N13 via the 1− resonance of O14. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2− and 3/2− resonances may be collectivized by the continuum coupling to nearby 2p- and 1p-decay channels. The observed excitation function H1(O14,p)O14 and resonance spectrum in F15 are well reproduced in the unified framework of the GSM.

Published
2022
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44. Evidence for enhanced neutron-proton correlations from the level structure of the $N=Z+1$ nucleus $_{43}^{87}\mathrm{Tc}_{44}$

Author

Liu, X., Cederwall, B., Qi, C., Wyss, R.A., Aktas, Ö., Ertoprak, A., Zhang, W., Clément, E., De France, G., Ralet, D., Gadea, A., Goasduff, A., Jaworski, G., Kuti, I., Nyakó, B.M., Nyberg, J., Palacz, M., Wadsworth, R., Valiente-Dobón, J.J., Al-Azri, H., Ataç Nyberg, A., Bäck, T., De Angelis, G., Doncel, M., Dudouet, J., Gottardo, A., Jurado, M., Ljungvall, J., Mengoni, D., Napoli, D.R., Petrache, C.M., Sohler, D., Timár, J., Barrientos, D., Bednarczyk, P., Benzoni, G., Birkenbach, B., Boston, A.J., Boston, H.C., Burrows, I., Charles, L., Ciemala, M., Crespi, F.C.L., Cullen, D.M., Désesquelles, P., Domingo-Pardo, C., Eberth, J., Erduran, N., Ertürk, S., González, V., Goupil, J., Hess, H., Huyuk, T., Jungclaus, A., Korten, W., Lemasson, A., Leoni, S., Maj, A., Menegazzo, R., Million, B., Perez-Vidal, R.M., Podolyàk, Zs., Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M.D., Sanchis, E., Simpson, J., Stezowski, O., Theisen, C., Zielińska, M., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

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

The low-lying excited states in the neutron-deficient $N = Z + 1$ nucleus $^{87}_{43}$Tc$_{44}$ have been studied via the fusion-evaporation reaction $^{54}$Fe $(^{36}Ar, 2n1p)$ $^{87}$Tc at the Grand Accélérateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt γ rays, neutrons, and charged particles emitted in the reaction. A level scheme of $^{87}$Tc from the $(9/2^+_{g.s})$ state to the $( 33 / 2^+_1$) state was established based on six mutually coincident γ -ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at $ℏω ≈ 0.50$ MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around $N=44$ is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the $N=Z$ line. The low-lying excited states in the neutron-deficient $N=Z+1$ nucleus $^{87}_{43}$Tc$^{\ }_{44}$ have been studied via the fusion-evaporation reaction $^{54}$Fe($^{36}$Ar, $2n1p$)$^{87}$Tc at the Grand Accélérateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt $\gamma$-rays, neutrons, and charged particles emitted in the reaction. A level scheme of $^{87}$Tc from the (9/2$^{+}_{g.s.}$) state to the (33/2$^{+}_{1}$) state was established based on 6 mutually coincident $\gamma$-ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at $\hbar\omega\approx 0.50$ MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around $N=44$ is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the $N=Z$ line.

Published
2021
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45. Evidence for enhanced neutron-proton correlations from the level structure of the N = Z+1 nucleus Tc-87(43)44

Author

Liu, X, Cederwall, B, Qi, C, Wyss, RA, Aktas, O, Ertoprak, A, Zhang, W, Clement, E, de France, G, Ralet, D, Gadea, A, Goasduff, A, Jaworski, G, Kuti, I, Nyako, BM, Nyberg, J, Palacz, M, Wadsworth, R, Valiente-Dobon, JJ, Al-Azri, H, Nyberg, A Atac, Back, T, de Angelis, G, Doncel, M, Dudouet, J, Gottardo, A, Jurado, M, Ljungvall, J, Mengoni, D, Napoli, DR, Petrache, CM, Sohler, D, Timar, J, Barrientos, D, Bednarczyk, P, Benzoni, G, Birkenbach, B, Boston, AJ, Boston, HC, Burrows, I, Charles, L, Ciemala, M, Crespi, FCL, Cullen, DM, Desesquelles, P, Domingo-Pardo, C, Eberth, J, Erduran, N, Erturk, S, Gonzalez, V, Goupil, J, Hess, H, Huyuk, T, Jungclaus, A, Korten, W, Lemasson, A, Leoni, S, Maj, A, Menegazzo, R, Million, B, Perez-Vidal, RM, Podolyak, Zs, Pullia, A, Recchia, F, Reiter, P, Saillant, F, Salsac, MD, Sanchis, E, Simpson, J, Stezowski, O, Theisen, C, and Zielinska, M

Published
2021

46. Evidence for enhanced neutron-proton correlations from the level structure of the N=Z+1 nucleus 87Tc

Author

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

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear Experiment
Abstract

The low-lying excited states in the neutron-deficient N=Z+1 nucleus Tc444387 have been studied via the fusion-evaporation reaction Fe54(Ar36, 2n1p)Tc87 at the Grand Accélérateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt γ rays, neutrons, and charged particles emitted in the reaction. A level scheme of Tc87 from the (9/2g.s.+) state to the (33/21+) state was established based on six mutually coincident γ-ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at ω≈0.50 MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around N=44 is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the N=Z line.

Published
2021

47. HeCTOr: the 3He Cryogenic Target of Orsay for direct nuclear reactions with radioactive ion beams

Author

Galtarossa, F., primary, Pierens, M., additional, Assié, M., additional, Delpech, V., additional, Galet, F., additional, Saugnac, H., additional, Brugnara, D., additional, Ramos, D., additional, Beaumel, D., additional, Blache, P., additional, Chabot, M., additional, Chatelet, F., additional, Clément, E., additional, Flavigny, F., additional, Giret, A., additional, Gottardo, A., additional, Goupil, J., additional, Lemasson, A., additional, Matta, A., additional, Ménager, L., additional, Mengoni, D., additional, and Rindel, E., additional

Published
2021
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48. Reinterpretation of excited states in Po212 : Shell-model multiplets rather than α -cluster states

Author

Fernández, A., primary, Jungclaus, A., additional, Golubev, P., additional, Rudolph, D., additional, Sarmiento, L. G., additional, Gargano, A., additional, Naïdja, H., additional, Astier, A., additional, Dupont, E., additional, Gadea, A., additional, Nácher, E., additional, Perea, A., additional, Wimmer, K., additional, Clément, E., additional, Fremont, G., additional, Goupil, J., additional, Houarner, C., additional, Jacquot, B., additional, Korichi, A., additional, Lemasson, A., additional, Li, H. J., additional, Ljungvall, J., additional, Ménager, L., additional, Pérez-Vidal, R. M., additional, Petrache, C. M., additional, Ralet, D., additional, Ropert, J. A., additional, Saillant, F., additional, Såmark-Roth, A., additional, Simpson, G. S., additional, Spitaels, C., additional, Zielinska, M., additional, Ansari, S., additional, Dudouet, J., additional, Illana, A., additional, Jurado, M., additional, Kocheva, D., additional, Lalović, N., additional, Lorenz, Ch., additional, Quintana, B., additional, Rainovski, G., additional, Redon, N., additional, Tocabens, G., additional, Barrientos, D., additional, Benzoni, G., additional, Birkenbach, B., additional, Boston, A. J., additional, Boston, H. C., additional, Bracco, A., additional, Ciemala, M., additional, Collado, J., additional, Cullen, D. M., additional, Domingo-Pardo, C., additional, Eberth, J., additional, González, V., additional, Harkness-Brennan, L. J., additional, Hess, H., additional, Judson, D. S., additional, Korten, W., additional, Leoni, S., additional, Maj, A., additional, Menegazzo, R., additional, Mengoni, D., additional, Michelagnoli, C., additional, Million, B., additional, Napoli, D. R., additional, Nyberg, J., additional, Podolyak, Zs., additional, Pullia, A., additional, Reiter, P., additional, Sanchis, E., additional, Stezowski, O., additional, Theisen, Ch., additional, and Valiente-Dobón, J. J., additional

Published
2021
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50. The MUGAST-AGATA-VAMOS campaign: Set-up and performances

Author

Assié, M., primary, Clément, E., additional, Lemasson, A., additional, Ramos, D., additional, Raggio, A., additional, Zanon, I., additional, Galtarossa, F., additional, Lenain, C., additional, Casal, J., additional, Flavigny, F., additional, Matta, A., additional, Mengoni, D., additional, Beaumel, D., additional, Blumenfeld, Y., additional, Borcea, R., additional, Brugnara, D., additional, Catford, W., additional, de Oliveira, F., additional, Delaunay, F., additional, De Séréville, N., additional, Didierjean, F., additional, Diget, C.Aa., additional, Dudouet, J., additional, Fernández-Domínguez, B., additional, Fougères, C., additional, Frémont, G., additional, Girard-Alcindor, V., additional, Giret, A., additional, Goasduff, A., additional, Gottardo, A., additional, Goupil, J., additional, Hammache, F., additional, John, P.R., additional, Korichi, A., additional, Lalanne, L., additional, Leblond, S., additional, Lefevre, A., additional, Legruel, F., additional, Ménager, L., additional, Million, B., additional, Nicolle, C., additional, Noury, F., additional, Rauly, E., additional, Rezynkina, K., additional, Rindel, E., additional, Rojo, J.S., additional, Siciliano, M., additional, Stanoiu, M., additional, Stefan, I., additional, and Vatrinet, L., additional

Published
2021
Full Text
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