Search

Your search keyword '"Louchart C"' showing total 171 results
Start Over Author "Louchart C"
171 results on '"Louchart C"'

1. Collectivity of neutron-rich Cr and Fe toward N=50

Author

Werner V., Santamaria C., Louchart C., Obertelli A., Doornenbal P., Nowacki F., Authelet G., Baba H., Calvet D., Château F., Corsi A., Delbart A., Gheller J.-M., Gillibert A., Isobe T., Lapoux V., Matsushita M., Momiyama S., Motobayashi T., Niikura M., Otsu H., Péron C., Peyaud A., Pollacco E.C., Roussé J.-Y., Sakurai H., Sasano M., Shiga Y., Takeuchi S., Taniuchi R., Uesaka T., Wang H., Yoneda K., Browne F., Chung L.X., Dombradi Zs., Franchoo S., Giacoppo F., Gottardo A., Hadynska-Klek K., Korkulu Z., Koyama S., Kubota Y., Lee J., Lettmann M., Lozeva R., Matsui K., Miyazaki T., Nishimura S., Olivier L., Ota S., Patel Z., Pietralla N., Sahin E., Shand C., Söderström P.-A., Stefan I., Steppenbeck D., Sumikama T., Suzuki D., Vajta Zs., Wu J., and Xu Z.

Subjects
Physics, QC1-999
Abstract

Within the SEASTAR project at RIKEN-RIBF, 66Cr and 70,72Fe have been produced via protonknockout reactions, and their first excited 2+ and 4+ states have been discovered. The combination of the liquid-hydrogen target and TPC system MINOS has been used in combination with the DALI2 detector array for the first time. A 345 MeV/u 238U beam with a mean intensity of about 12 pnA impinged on a Be target. Fission fragments were separated and identified using the BigRIPS spectrograph, and reaction products were analyzed using the ZeroDegree spectrograph. A plateau of excitation energies, with a small change in the systematic trends past N = 44, reveals an extension of the N = 40 region of collectivity toward N = 50. Hence, the isotopes of interest are located within the N = 40 island of inversion. An interpretation of the observed trends is offered through large scale shell model calculations.

Published
2016
Full Text
View/download PDF

2. Analysis of the Response of AGATA Detectors at GSI

Author

Lalović N., Perez-Vidal R. M., Louchart C., Michelagnoli C., Ralet D., Arici T., Bazzacco D., Clément E., Gadea A., Gerl J., Kojouharov I., Korichi A., Labiche M., Ljungvall J., Lopez-Martens A., Nyberg J., Pietralla N., Pietri S., Rudolph D., and Stezowski O.

Subjects
Physics, QC1-999
Abstract

In 2012 and 2014 the γ-ray tracking spectrometer AGATA was operated at the SIS/FRS facility at GSI in Darmstadt, Germany. The performance of the array is discussed, outlining some important aspects of the offline data processing and analysis. Relying on the data obtained from measurements with standard γ-ray sources, a first estimate of the photopeak efficiency and peak-to-total (P/T) is presented.

Published
2015
Full Text
View/download PDF

3. Lifetime measurements on fission fragments in the A ∼ 100 region

Author

Grente L., Salsac M.-D., Korten W., Görgen A., Hagen T. W., Braunroth T., Bruyneel B., Celikovic I., Clément E., Delaune O., Dijon A., Drouart A., Ertürk S., Farget F., de France G., Gottardo A., Hackstein M., Jacquot B., Libert J., Litzinger J., Ljungvall J., Louchart C., Michelagnoli C., Napoli D.R., Navin A., Pillet N., Pipidis A., Recchia F., Rejmund M., Rother W., Sahin E., Schmitt C., Siem S., Sulignano B., Valiente-Dobon J.J., and Zell K.O.

Subjects
Physics, QC1-999
Abstract

Lifetimes of first 4+ and 6+ states have been measured in neutron-rich isotopes of Zr, Mo, Ru and Pd using the recoil distance Doppler shift method at GANIL. The nuclei were produced through a fusion-fission reaction in inverse kinematics. The fission fragments were fully identified in the large-acceptance VAMOS spectrometer and γ-rays were detected in coincidence with the EXOGAM germanium array. Lifetimes of excited states in the range of 1–100 ps were measured with the Cologne plunger. Preliminary lifetime results are presented as well as a discussion on the evolution of the collectivity in this region.

Published
2013
Full Text
View/download PDF

4. $^{78}$Ni revealed as a doubly magic stronghold against nuclear deformation

Author

Taniuchi, R., Santamaria, C., Doornenbal, P., Obertelli, A., Yoneda, K., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J. -M., Gillibert, A., Holt, J. D., Isobe, T., Lapoux, V., Matsushita, M., Menéndez, J., Momiyama, S., Motobayashi, T., Niikura, M., Nowacki, F., Ogata, K., Otsu, H., Otsuka, T., Péron, C., Péru, S., Peyaud, A., Pollacco, E. C., Poves, A., Roussé, J. -Y., Sakurai, H., Schwenk, A., Shiga, Y., Simonis, J., Stroberg, S. R., Takeuchi, S., Tsunoda, Y., Uesaka, T., Wang, H., Browne, F., Chung, L. X., Dombradi, Z., Franchoo, S., Giacoppo, F., Gottardo, A., Hadyńska-Klęk, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Olivier, L., Ota, S., Patel, Z., Şahin, E., Shand, C., Söderström, P. -A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Z., Werner, V., Wu, J., and Xu, Z. Y.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Nuclear magic numbers, which emerge from the strong nuclear force based on quantum chromodynamics, correspond to fully occupied energy shells of protons, or neutrons inside atomic nuclei. Doubly magic nuclei, with magic numbers for both protons and neutrons, are spherical and extremely rare across the nuclear landscape. While the sequence of magic numbers is well established for stable nuclei, evidence reveals modifications for nuclei with a large proton-to-neutron asymmetry. Here, we provide the first spectroscopic study of the doubly magic nucleus $^{78}$Ni, fourteen neutrons beyond the last stable nickel isotope. We provide direct evidence for its doubly magic nature, which is also predicted by ab initio calculations based on chiral effective field theory interactions and the quasi-particle random-phase approximation. However, our results also provide the first indication of the breakdown of the neutron magic number 50 and proton magic number 28 beyond this stronghold, caused by a competing deformed structure. State-of-the-art phenomenological shell-model calculations reproduce this shape coexistence, predicting further a rapid transition from spherical to deformed ground states with $^{78}$Ni as turning point.

Published
2019
Full Text
View/download PDF

5. Evidence for coexisting shapes in $^{98}$Zr through lifetime measurements

Author

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

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The lifetimes of first excited 2$^+$, 4$^+$ and 6$^+$ states in $^{98}$Zr were measured with the Recoil-Distance Doppler Shift method in an experiment performed at GANIL. Excited states in $^{98}$Zr were populated using the fission reaction between a 6.2 MeV/u $^{238}$U beam and a $^{9}$Be target. The $\gamma$ rays were detected with the EXOGAM array in correlation with the fission fragments identified in mass and atomic number in the VAMOS++ spectrometer. Our result shows very small B(E2;2$_1^+$ $\rightarrow$ 0$_1^+$) value in $^{98}$Zr thereby confirming the very sudden onset of collectivity at $N=60$. The experimental results are compared to large-scale Monte Carlo Shell model and beyond mean field calculations. The present results indicate coexistence of two additional deformed shapes in this nucleus along with the spherical ground state.

Published
2019
Full Text
View/download PDF

6. Inelastic scattering of ⁷²,⁷⁴Ni off a proton target

Author

Cortés, M L, Doornenbal, P., Obertelli, A., Pietralla, N., Werner, V., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.-M., Gillibert, A., Isobe, T., Lapoux, V., Louchart, C., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Péron, C., Peyaud, A., Pollacco, E. C., Roussé, J.-Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Browne, F., Chung, L. X., Dombradi, Zs., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Olivier, L., Ota, S., Patel, Z., Sahin, E., Shand, C. M., Söderström, P.-A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs., Wu, J., Xu, Z., Cortés, M L, Doornenbal, P., Obertelli, A., Pietralla, N., Werner, V., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.-M., Gillibert, A., Isobe, T., Lapoux, V., Louchart, C., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Péron, C., Peyaud, A., Pollacco, E. C., Roussé, J.-Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Browne, F., Chung, L. X., Dombradi, Zs., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Olivier, L., Ota, S., Patel, Z., Sahin, E., Shand, C. M., Söderström, P.-A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs., Wu, J., and Xu, Z.

Abstract

Inelastic scattering of ⁷²,⁷⁴Ni off a proton target was performed at RIBF, RIKEN, Japan. The isotopes were produced by the fission of ²³⁸U on a thick Beryllium target and were then selected and identified on an event-by-event basis using the BigRIPS separator. Selected isotopes were focused onto the liquid hydrogen target of the MINOS device and gamma rays from the reactions were measured with the DALI2 array. The energy of the ions in the middle of the target was 213 MeV/u. Outgoing particles were identified using the ZeroDegree spectrometer. Here, we report on the current status of the data analysis and preliminary results for the proton inelastic scattering cross sections for both isotopes.

Published
2024

7. 78Ni revealed as a doubly magic stronghold against nuclear deformation

Author

Taniuchi, R., Santamaria, C., Doornenbal, P., Obertelli, A., Yoneda, K., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.-M., Gillibert, A., Holt, J. D., Isobe, T., Lapoux, V., Matsushita, M., Menéndez, J., Momiyama, S., Motobayashi, T., Niikura, M., Nowacki, F., Ogata, K., Otsu, H., Otsuka, T., Péron, C., Péru, S., Peyaud, A., Pollacco, E. C., Poves, A., Roussé, J.-Y., Sakurai, H., Schwenk, A., Shiga, Y., Simonis, J., Stroberg, S. R., Takeuchi, S., Tsunoda, Y., Uesaka, T., Wang, H., Browne, F., Chung, L. X., Dombradi, Z., Franchoo, S., Giacoppo, F., Gottardo, A., Hadyńska-Klęk, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Olivier, L., Ota, S., Patel, Z., Şahin, E., Shand, C., Söderström, P.-A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Z., Werner, V., Wu, J., and Xu, Z. Y.

Published
2019
Full Text
View/download PDF

9. Lifetimes of excited states in triaxially deformed 107Tc and 109,111,113Rh

Author

Hagen, T. W., Görgen, A., Korten, W., Grente, L., Salsac, M. -D., Farget, F., Braunroth, T., Bruyneel, B., Celikovic, I., Clément, E., de France, G., Delaune, O., Dewald, A., Dijon, A., Hackstein, M., Jacquot, B., Litzinger, J., Ljungvall, J., Louchart, C., Michelagnoli, C., Napoli, D. R., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Theisen, Ch., and Valiente-Dobon, J. J.

Published
2018
Full Text
View/download PDF

11. Shell structure of the neutron-rich isotopes Co 69,71,73

Author

Lokotko, T., Leblond, S., Lee, J., Doornenbal, P., Obertelli, A., Poves, A., Nowacki, F., Ogata, K., Yoshida, K., Authelet, G., Baba, H., Calvet, D., Château, F., Chen, S., Corsi, A., Delbart, A., Gheller, J. M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Péron, C., Peyaud, A., Pollacco, E. C., Roussé, J. Y., Sakurai, H., Santamaria, C., Xu, Z. Y., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Werner, V., Browne, F., Chung, L. X., Dombradi, Zs, Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Lettmann, M., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Olivier, L., Ota, S., Patel, Z., Sahin, E., Shand, C., Söderström, P. A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs, and Wu, J.

Subjects
Nuclear Experiment
Abstract

The structures of the neutron-rich Co69,71,73 isotopes were investigated via (p,2p) knockout reactions at the Radioactive Isotope Beam Factory, RIKEN. Isotopes of interest were studied using the DALI2 γ-ray detector array combined with the MINOS target and tracker system. Level schemes were reconstructed using the γ-γ coincidence technique, with tentative spin-parity assignments based on the measured inclusive and exclusive cross sections. Comparison with shell-model calculations using the Lenzi-Nowacki-Poves-Sieja LNPS and PFSDG-U interactions suggests coexistence of spherical and deformed shapes at low excitation energies in the Co69,71,73 isotopes. The distorted-wave impulse approximation (DWIA) framework was used to calculate the single-particle cross sections. These values were compared with the experimental findings.

Published
2020

12. Sequential Nature of $(p,3p)$ Two-Proton Knockout from Neutron-Rich Nuclei

Author

Frotscher, A., Gómez-Ramos, M., Obertelli, A., Doornenbal, P., Authelet, G., Baba, H., Calvet, D., Château, F., Chen, S., Corsi, A., Delbart, A., Gheller, J.M., Giganon, A., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Paul, N., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Shimizu, N., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A.M., Carroll, R., Chung, L.X., Cortés, M.L., Dewald, M., Ding, B., Dombradi, Zs., Flavigny, F., Franchoo, S., Giacoppo, F., Górska, M., Gottardo, A., Hadyńska-Klęk, K., Korkulu, Z., Koyama, S., Kubota, Y., Jungclaus, A., Lee, J., Lettmann, M., Linh, B.D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, S., Nakatsuka, N., Nita, C., Nishimura, S., Nobs, C.R., Olivier, L., Ota, S., Patel, Z., Podolyák, Zs., Rudigier, M., Sahin, E., Saito, T.Y., Shand, C., Söderström, P.A., Stefan, I.G., Sumikama, T., Suzuki, D., Orlandi, R., Vaquero, V., Vajta, Zs., Werner, V., Wimmer, K., Wu, J., Xu, Z., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de physique 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 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), 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-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 Theory, ddc:530, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Nuclear Physics
Abstract

Twenty-one two-proton knockout (p; 3p) cross sections from neutron-rich nuclei at ~ 250 MeV/nucleon were measured. For the first time, the angular distribution of the three emitted protons were measured in coincidence with the tracker and hydrogen target MINOS, demonstrating that the (p; 3p) kinematics is consistent with two sequential proton-proton collisions within the projectile nucleus. Ratios of (p; 3p) over (p; 2p) inclusive cross sections follow the trend of other many-proton (neutron) removal reactions, further reinforcing the sequential nature of (p; 3p) in neutron-rich nuclei.

Published
2020
Full Text
View/download PDF

13. Sequential Nature of (p,3p) Two-Proton Knockout from Neutron-Rich Nuclei

Author

Frotscher, A., Gomez-Ramos, M., Obertelli, A., Doornenbal, P., Authelet, G., Baba, H., Calvet, D., Chateau, F., Chen, S., Corsi, A., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Isobe, T., Lapoux, V, Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Paul, N., Peron, C., Peyaud, A., Pollacco, E. C., Rousse, J-Y, Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Shimizu, N., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A. M., Carroll, R., Chung, L. X., Cortes, M. L., Dewald, M., Ding, B., Dombradi, Zs, Flavigny, F., Franchoo, S., Giacoppo, F., Groska, M., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Jungclaus, A., Lee, J., Lettmann, M., Linh, B. D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, S., Nakatsuka, N., Nita, C., Nishimura, S., Nobs, C. R., Olivier, L., Ota, S., Patel, Z., Podolyak, Zs, Rudigier, M., Sahin, E., Saito, T. Y., Shand, C., Soderstrom, P-A, Stefan, I. G., Sumikama, T., Suzuki, D., Orlandi, R., Vaquero, V., Vajta, Zs, Werner, V, Wimmer, K., Wu, J., Xu, Z., Frotscher, A., Gomez-Ramos, M., Obertelli, A., Doornenbal, P., Authelet, G., Baba, H., Calvet, D., Chateau, F., Chen, S., Corsi, A., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Isobe, T., Lapoux, V, Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Paul, N., Peron, C., Peyaud, A., Pollacco, E. C., Rousse, J-Y, Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Shimizu, N., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A. M., Carroll, R., Chung, L. X., Cortes, M. L., Dewald, M., Ding, B., Dombradi, Zs, Flavigny, F., Franchoo, S., Giacoppo, F., Groska, M., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Jungclaus, A., Lee, J., Lettmann, M., Linh, B. D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, S., Nakatsuka, N., Nita, C., Nishimura, S., Nobs, C. R., Olivier, L., Ota, S., Patel, Z., Podolyak, Zs, Rudigier, M., Sahin, E., Saito, T. Y., Shand, C., Soderstrom, P-A, Stefan, I. G., Sumikama, T., Suzuki, D., Orlandi, R., Vaquero, V., Vajta, Zs, Werner, V, Wimmer, K., Wu, J., and Xu, Z.

Abstract

Twenty-one two-proton knockout (p, 3p) cross sections were measured from neutron-rich nuclei at similar to 250 MeV/nucleon in inverse kinematics. The angular distribution of the three emitted protons was determined for the first time, demonstrating that the (p, 3p) kinematics are consistent with two sequential proton-proton collisions within the projectile nucleus. Ratios of (p, 3p) over (p, 2p) inclusive cross sections follow the trend of other many-nucleon removal reactions, further reinforcing the sequential nature of (p, 3p) in neutron-rich nuclei.

Published
2020

14. Sequential Nature of (p,3p) Two-Proton Knockout from Neutron-Rich Nuclei

Author

Frotscher, A., primary, Gómez-Ramos, M., additional, Obertelli, A., additional, Doornenbal, P., additional, Authelet, G., additional, Baba, H., additional, Calvet, D., additional, Château, F., additional, Chen, S., additional, Corsi, A., additional, Delbart, A., additional, Gheller, J.-M., additional, Giganon, A., additional, Gillibert, A., additional, Isobe, T., additional, Lapoux, V., additional, Matsushita, M., additional, Momiyama, S., additional, Motobayashi, T., additional, Niikura, M., additional, Otsu, H., additional, Paul, N., additional, Péron, C., additional, Peyaud, A., additional, Pollacco, E. C., additional, Roussé, J.-Y., additional, Sakurai, H., additional, Santamaria, C., additional, Sasano, M., additional, Shiga, Y., additional, Shimizu, N., additional, Steppenbeck, D., additional, Takeuchi, S., additional, Taniuchi, R., additional, Uesaka, T., additional, Wang, H., additional, Yoneda, K., additional, Ando, T., additional, Arici, T., additional, Blazhev, A., additional, Browne, F., additional, Bruce, A. M., additional, Carroll, R., additional, Chung, L. X., additional, Cortés, M. L., additional, Dewald, M., additional, Ding, B., additional, Dombradi, Zs., additional, Flavigny, F., additional, Franchoo, S., additional, Giacoppo, F., additional, Górska, M., additional, Gottardo, A., additional, Hadyńska-Klęk, K., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Jungclaus, A., additional, Lee, J., additional, Lettmann, M., additional, Linh, B. D., additional, Liu, J., additional, Liu, Z., additional, Lizarazo, C., additional, Louchart, C., additional, Lozeva, R., additional, Matsui, K., additional, Miyazaki, T., additional, Moschner, K., additional, Nagamine, S., additional, Nakatsuka, N., additional, Nita, C., additional, Nishimura, S., additional, Nobs, C. R., additional, Olivier, L., additional, Ota, S., additional, Patel, Z., additional, Podolyák, Zs., additional, Rudigier, M., additional, Sahin, E., additional, Saito, T. Y., additional, Shand, C., additional, Söderström, P.-A., additional, Stefan, I. G., additional, Sumikama, T., additional, Suzuki, D., additional, Orlandi, R., additional, Vaquero, V., additional, Vajta, Zs., additional, Werner, V., additional, Wimmer, K., additional, Wu, J., additional, and Xu, Z., additional

Published
2020
Full Text
View/download PDF

15. Shell structure of the neutron-rich isotopes Co69,71,73

Author

Lokotko, T., primary, Leblond, S., additional, Lee, J., additional, Doornenbal, P., additional, Obertelli, A., additional, Poves, A., additional, Nowacki, F., additional, Ogata, K., additional, Yoshida, K., additional, Authelet, G., additional, Baba, H., additional, Calvet, D., additional, Château, F., additional, Chen, S., additional, Corsi, A., additional, Delbart, A., additional, Gheller, J.-M., additional, Gillibert, A., additional, Isobe, T., additional, Lapoux, V., additional, Matsushita, M., additional, Momiyama, S., additional, Motobayashi, T., additional, Niikura, M., additional, Otsu, H., additional, Péron, C., additional, Peyaud, A., additional, Pollacco, E. C., additional, Roussé, J.-Y., additional, Sakurai, H., additional, Santamaria, C., additional, Xu, Z. Y., additional, Sasano, M., additional, Shiga, Y., additional, Takeuchi, S., additional, Taniuchi, R., additional, Uesaka, T., additional, Wang, H., additional, Werner, V., additional, Browne, F., additional, Chung, L. X., additional, Dombradi, Zs., additional, Franchoo, S., additional, Giacoppo, F., additional, Gottardo, A., additional, Hadynska-Klek, K., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Lettmann, M., additional, Louchart, C., additional, Lozeva, R., additional, Matsui, K., additional, Miyazaki, T., additional, Nishimura, S., additional, Olivier, L., additional, Ota, S., additional, Patel, Z., additional, Sahin, E., additional, Shand, C., additional, Söderström, P.-A., additional, Stefan, I., additional, Steppenbeck, D., additional, Sumikama, T., additional, Suzuki, D., additional, Vajta, Zs., additional, and Wu, J., additional

Published
2020
Full Text
View/download PDF

16. Prominence of Pairing in Inclusive ($p$ ,2$p$) and ($p$, $pn$) Cross Sections from Neutron-Rich Nuclei

Author

Paul, N., Obertelli, A., Bertulani, C, Corsi, A., Doornenbal, P., Rodriguez-Sanchez, J. L., Authelet, G., Baba, H., Calvet, D., Chateau, F., Chen, S., Delbart, A., Gheller, J.-M., Giganon, A., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Peron, C., Peyaud, A., Pollacco, E., Rousse, J.-Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A., Carroll, R., Chung, L. X., Cortés, M., Dewald, M., Ding, B., Dombradi, Zs, Flavigny, F., Franchoo, S., Giacoppo, F., Górska, M., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Jungclaus, A., Lee, J., Lettmann, M., Linh, B, Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, Radomira, Matsui, K., Miyazaki, T., Moschner, K., Nagamine, S., Nakatsuka, N., Nita, C., Nishimura, S., Nobs, C., Olivier, L., Ota, S., Patel, Z., Podolyák, Zs, Rudigier, M., Sahin, E., Saito, T., Shand, C., Söderström, P.-A, Stefan, I, Sumikama, T., Suzuki, D., Orlandi, R., Vaquero, V., Werner, V., Wimmer, K., Wu, J., Xu, Z., Dombradi, Zs., Podolyak, Zs., Stefan, G., Vajta, Zs., Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Technische Universität Darmstadt (TU Darmstadt), Texas A&M University–Commerce, Helmholtz Centre for Heavy Ion Research (GSI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département d'Electronique, des Détecteurs et d'Informatique pour la Physique (ex SEDI) (DEDIP), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre for Nuclear Study, University of Tokyo (CNS), The University of Tokyo (UTokyo), Department of Applied Physics, The University of Tokyo, Département d'Ingénierie des Systèmes (ex SIS) (DIS), Rikkyo University [Tokyo], Universität zu Köln, School of Computing, Engineering and Mathematics (Brighton), University of Brighton, University of Surrey (UNIS), Institute for Nuclear Science and Technique, VINATOM, Institut für Kernphysik der Universität zu Köln, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China (IMP), Institute for Nuclear Research [Budapest] (ATOMKI), Hungarian Academy of Sciences (MTA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), University of Oslo (UiO), Spanish National Research Council [Madrid] (CSIC), City University of Hong Kong [Hong Kong] (CUHK), 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), Kyoto University [Kyoto], IFIN-HH, Oslo University Hospital [Oslo], Tohoku University [Sendai], Japan Atomic Energy Agency [Ibaraki] (JAEA), Department of Physics, University of Tokyo, Bunkyo, Tokyo, European Project: 258567,EC:FP7:ERC,ERC-2010-StG_20091028,MINOS(2010), Technische Universität Darmstadt - Technical University of Darmstadt (TU Darmstadt), Universität zu Köln = University of Cologne, and Kyoto University

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

International audience; Fifty-five inclusive single nucleon-removal cross sections from medium mass neutron-rich nuclei impinging on a hydrogen target at $\sim$250 MeV=nucleon are measured at the RIKEN Radioactive Isotope Beam Factory. Systematically higher cross sections are found for proton removal from nuclei with an even number of protons as compared to odd-proton number projectiles for a given neutron separation energy. Neutron removal cross sections display no even-odd splitting, contrary to nuclear cascade model predictions. Both effects are understood through simple considerations of neutron separation energies and bound state level densities originating in pairing correlations in the daughter nuclei. These conclusions are supported by comparison with semimicroscopic model predictions, highlighting the enhanced role of lowlying level densities in nucleon-removal cross sections from loosely bound nuclei

Published
2019
Full Text
View/download PDF

17. Nuclear structure of $^{76}\mathrm{Ni}$ from the ($p,2p$) reaction

Author

Elekes, Z., Kripkó, Á., Sohler, D., Sieja, K., Ogata, K., Yoshida, K., Doornenbal, P., Obertelli, A., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Otsu, H., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.Y., Sakurai, H., Santamaria, C., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Browne, F., Chung, L.X., Dombrádi, Zs., Flavigny, F., Franchoo, S., Giacoppo, F., Gottardo, A., Hadyńska-Klęk, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Niikura, M., Nishimura, S., Olivier, L., Ota, S., Patel, Z., Sahin, E., Shand, C., Söderström, P.A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs., Werner, V., Wu, J., Xu, Z., 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, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), SunFlower, Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Astrophysics::High Energy Astrophysical Phenomena, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure
Abstract

International audience; The nuclear structure of the Ni76 nucleus was investigated by (p,2p) reaction using a NaI(Tl) array to detect the deexciting prompt γ rays. A new transition with an energy of 2227 keV was identified by γγ and γγγ coincidences. According to these coincidence spectra the observed transition connects a new state at 4147 keV and the previously known 41+ state at 1920 keV. Two weaker transitions were also obtained at 2441 and 2838 keV, which could be tentatively placed to feed the known 21+ state at 990 keV. Our shell-model calculations using the Lenzi, Nowacki, Poves, and Sieja interaction produced good candidates for the experimental proton hole states in the observed energy region, and the theoretical cross sections showed good agreement with the experimental values. Although we could not assign all the experimental states to the theoretical ones unambiguously, the results are consistent with a reasonably large Z=28 shell gap for nickel isotopes in accordance with previous studies.

Published
2019
Full Text
View/download PDF

18. Nuclear structure of 76Ni from the (p,2p) reaction

Author

Elekes, Z, Kripkó, Á, Sohler, D, Sieja, K, Ogata, K., Yoshida, K, Doornenbal, P, Obertelli, A, Authelet, G, Baba, H, Calvet, D, Château, F, Corsi, A, Delbart, A, Gheller, J.-M., Gillibert, A, Isobe, T, Lapoux, V, Matsushita, M, Momiyama, S, Motobayashi, T, Otsu, H, Péron, C, Peyaud, A, Pollacco, E.C., Roussé, J-Y, Sakurai, H, Santamaria, C, Shiga, Y, Takeuchi, S, Taniuchi, R, Uesaka, T, Wang, H, Yoneda, K, Browne, F, Chung, L.X., Dombrádi, Zs, Flavigny, F., Franchoo, S, Giacoppo, Francesca, Gottardo, A, Hadynska-Klek, Katarzyna, Korkulu, Z, Koyama, S, Kubota, Y, Lee, J, Lettmann, M, Louchart, C, Lozeva, R, Matsui, K, Miyazaki, T, Niikura, M, Nishimura, S, Olivier, L, Ota, S, Patel, Z, Sahin, Eda, Shand, C, Söderström, P.-A., Stefan, I, Steppenbeck, D, Sumikama, T, Suzuki, D, Vajta, Zs, Werner, V, Wu, J, and Xu, Z

Subjects
Astrophysics::High Energy Astrophysical Phenomena
Abstract

The nuclear structure of the 76 Ni nucleus was investigated by ( p , 2 p ) reaction using a NaI(Tl) array to detect the deexciting prompt γ rays. A new transition with an energy of 2227 keV was identified by γ γ and γ γ γ coincidences. According to these coincidence spectra the observed transition connects a new state at 4147 keV and the previously known 4+1 state at 1920 keV. Two weaker transitions were also obtained at 2441 and 2838 keV, which could be tentatively placed to feed the known 2+1 state at 990 keV. Our shell-model calculations using the Lenzi, Nowacki, Poves, and Sieja interaction produced good candidates for the experimental proton hole states in the observed energy region, and the theoretical cross sections showed good agreement with the experimental values. Although we could not assign all the experimental states to the theoretical ones unambiguously, the results are consistent with a reasonably large Z=28 shell gap for nickel isotopes in accordance with previous studies.

Published
2019

19. Prominence of Pairing in Inclusive (p,2p) and (p,pn) Cross Sections from Neutron-Rich Nuclei

Author

Paul, N., Obertelli, A., Bertulani, C. A., Corsi, A., Doornenbal, P., Rodriguez-Sanchez, J. L., Authelet, G., Baba, H., Calvet, D., Chateau, F., Chen, S., Delbart, A., Gheller, J. -M., Giganon, A., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Peron, C., Peyaud, A., Pollacco, E. C., Rousse, J. -Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A. M., Carroll, R., Chung, L. X., Cortes, M. L., Dewald, M., Ding, B., Dombradi, Zs., Flavigny, F., Franchoo, S., Giacoppo, F., Gorska, M., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Jungclaus, A., Lee, J., Lettmann, M., Linh, B. D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, S., Nakatsuka, N., Nita, C., Nishimura, S., Nobs, C. R., Olivier, L., Ota, S., Patel, Z., Podolyak, Zs., Rudigier, M., Sahin, E., Saito, T. Y., Shand, C., Soderstrom, P. -A., Stefan, I. G., Sumikama, T., Suzuki, D., Orlandi, R., Vaquero, V., Vajta, Zs., Werner, V., Wimmer, K., Wu, J., Xu, Z., Paul, N., Obertelli, A., Bertulani, C. A., Corsi, A., Doornenbal, P., Rodriguez-Sanchez, J. L., Authelet, G., Baba, H., Calvet, D., Chateau, F., Chen, S., Delbart, A., Gheller, J. -M., Giganon, A., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Peron, C., Peyaud, A., Pollacco, E. C., Rousse, J. -Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A. M., Carroll, R., Chung, L. X., Cortes, M. L., Dewald, M., Ding, B., Dombradi, Zs., Flavigny, F., Franchoo, S., Giacoppo, F., Gorska, M., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Jungclaus, A., Lee, J., Lettmann, M., Linh, B. D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, S., Nakatsuka, N., Nita, C., Nishimura, S., Nobs, C. R., Olivier, L., Ota, S., Patel, Z., Podolyak, Zs., Rudigier, M., Sahin, E., Saito, T. Y., Shand, C., Soderstrom, P. -A., Stefan, I. G., Sumikama, T., Suzuki, D., Orlandi, R., Vaquero, V., Vajta, Zs., Werner, V., Wimmer, K., Wu, J., and Xu, Z.

Abstract

Fifty-five inclusive single nucleon-removal cross sections from medium mass neutron-rich nuclei impinging on a hydrogen target at similar to 250 MeV/nucleon are measured at the RIKEN Radioactive Isotope Beam Factory. Systematically higher cross sections are found for proton removal from nuclei with an even number of protons as compared to odd-proton number projectiles for a given neutron separation energy. Neutron removal cross sections display no even-odd splitting, contrary to nuclear cascade model predictions. Both effects are understood through simple considerations of neutron separation energies and bound state level densities originating in pairing correlations in the daughter nuclei. These conclusions are supported by comparison with semimicroscopic model predictions, highlighting the enhanced role of low-lying level densities in nucleon-removal cross sections from loosely bound nuclei.

Published
2019

20. Spectroscopy of [formula omitted]Mn: Strong coupling in the N = 40 “island of inversion”

Author

Liu, X.Y., Liu, Z., Ding, B., Doornenbal, P., Obertelli, A., Lenzi, S.M., Walker, P.M., Chung, L.X., Linh, B.D., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.-M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Nowacki, F., Otsu, H., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.-Y., Sakurai, H., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Lam, Y.H., Huang, T.H., Sun, M.D., Zhang, W.Q., Lu, H.Y., Hou, D.S., Browne, F., Dombradi, Zs., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Louchart, C., Olivier, L., Ota, S., Patel, Z., Sahin, E., Santamaria, C., Shand, C., Söderström, P.-A., Stefan, G.L., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs., Werner, V., Wu, J., Xu, Z., Zhou, X.H., Zhang, Y.H., Xu, H.S., and Zhang, F.S.

Published
2018
Full Text
View/download PDF

21. Spectroscopy of Mn: Strong coupling in the = 40 'island of Inversion'

Author

Liu, X.Y., Liu, Z., Ding, B., Doornenbal, P., Obertelli, A., Lenzi, S.M., Walker, P.M., Chung, L.X., Linh, B.D., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Nowacki, F., Otsu, H., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.Y., Sakurai, H., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Lam, Y.H., Huang, T.H., Sun, M.D., Zhang, W.Q., Lu, H.Y., Hou, D.S., Browne, F., Dombradi, Zs., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Louchart, C., Olivier, L., Ota, S., Patel, Z., Sahin, E., Santamaria, C., Shand, C., Söderström, P.A., Stefan, G.L., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs., Werner, V., Wu, J., Xu, Z., Zhou, X.H., Zhang, Y.H., Xu, H.S., and Zhang, F.S.

Abstract

Excited states in $^{63,65,67}$Mn were studied via in-beam γ-ray spectroscopy following knockout reactions from $^{68}$Fe. Similar level schemes, consisting of the 11/2$^{−}$, 9/2$^{−}$, 7/2$^{−}$ and 5/2g.s.− level sequence, connected by I→I−1 transitions, were established, the first time for $^{65,67}$Mn. Their level structures show features consistent with strongly-coupled rotational bands with K=5/2. State-of-the-art shell-model calculations with the modified LNPS effective interaction reproduce the observed levels remarkably well and suggest the dominance of 4-particle-4-hole neutron configurations for all the states. The data on the low-lying excited states of odd-mass $^{53−67}$Mn provide a textbook example of nuclear structure evolution from weak coupling through decoupling to strong coupling along a single isotopic chain on the n-rich side of the β stability line. These results help to deepen our understanding of the N=40 “island of inversion”.

Published
2018

22. Study of isomeric states in 198,200,202,206 Pb and 206 Hg populated in fragmentation reactions

Author

Agata Collaboration, The, Lalović, N., Rudolph, D., Podolyák, Zs, Sarmiento, L. G., Simpson, E. C., Alexander, T., Cortés, M. L., Gerl, J., Golubev, P., Ameil, F., Arici, T., Bauer, Ch, Bazzacco, D., Bentley, M. A., Boutachkov, P., Bowry, M., Fahlander, C., Gadea, A., Gellanki, J., Givechev, A., Goel, N., Górska, M., Gottardo, A., Gregor, E., Guastalla, G., Habermann, T., Hackstein, M., Jungclaus, A., Kojouharov, I., Kumar, R., Kurz, N., Lettmann, M., Lizarazo, C., Louchart, C., Merchán, E., Michelagnoli, C., Moeller, Th, Moschner, K., Patel, Z., Pietralla, N., Pietri, S., Ralet, D., Reese, M., Regan, P. H., Reiter, P., Schaffner, H., Singh, P., Stahl, C., Stegmann, R., Stezowski, O., Taprogge, J., Thöle, P., Wendt, A., Wieland, O., Wilson, E., Wood, R., Wollersheim, H. J., Birkenbach, B., Bruyneel, B., Burrows, I., Clément, E., Désesquelles, P., Domingo-Pardo, C., Eberth, J., González, V., Hess, H., Jolie, J., Judson, D. S., Menegazzo, R., Mengoni, D., Napoli, D. R., Pullia, A., Quintana, B., Rainovski, G., Salsac, M. D., Sanchis, E., Simpson, J., and Dóbon, J. J.Valiente

Abstract

Isomeric states in isotopes in the vicinity of doubly-magic 208 Pb were populated following reactions of a relativistic 208 Pb primary beam impinging on a 9 Be fragmentation target. Secondary beams of 198,200,202,206 Pb and 206 Hg were isotopically separated and implanted in a passive stopper positioned in the focal plane of the GSI Fragment Separator. Delayed γ rays were detected with the Advanced Gamma Tracking Array (AGATA). Decay schemes were re-evaluated and interpreted with shell-model calculations. The momentum-dependent population of isomeric states in the two-nucleon hole nuclei 206 Pb/ 206 Hg was found to differ from the population of multi neutron-hole isomeric states in 198,200,202 Pb.

Published
2018

23. Spectroscopy of 25,65/67Mn: Strong coupling in the N = 40 'island of inversion'

Author

Liu, XY, Liu, Zhong, Ding, B, Doornenbal, P, Obertelli, A, Lenzi, SM, Walker, PM, Chung, LX, Linh, BD, Authelet, G, Baba, H, Calvet, D, Chateau, F, Corsi, A, Delbart, A, Gheller, JM, Gillibert, A, Isobe, T, Lapoux, V, Matsushita, M, Momiyama, S, Motobayashi, T, Niikura, M, Nowacki, F, Otsu, H, Péron, C, Peyaud, A, Pollacco, EC, Roussé, JY, Sakurai, H, Sasano, M, Shiga, Y, Takeuchi, S, Taniuchi, R, Uesaka, T, Wang, H, Yoneda, K, Lam, YH, Huang, TH, Sun, MD, Zhang, WQ, Lu, HY, Hou, DS, Browne, F, Dombradi, Zs, Franchoo, S, Giacoppo, Francesca, Gottardo, A, Hadynska-Klek, Katarzyna, Korkulu, Z, Koyama, S, Kubota, Y, Lee, J, Lettmann, M, Lozeva, R, Matsui, K, Miyazaki, T, Nishimura, S, Louchart, C, Olivier, L, Ota, S, Patel, Z, Sahin, Eda, Santamaria, C, Shand, C, Söderstrom, PA, Stefan, GL, Steppenbeck, D, Sumikama, T, Suzuki, D, Vajta, Zs, Werner, V, Wu, J, Xu, Z, Zhou, XH, Zhang, YH, Xu, HS, and Zhang, FS

Abstract

Excited states in 63,65,67Mn were studied via in-beam γ -ray spectroscopy following knockout reactions from 68Fe. Similar level schemes, consisting of the 11/2−, 9/2−, 7/2− and 5/2− g.s. level sequence, connected by I → I − 1 transitions, were established, the first time for 65,67Mn. Their level structures show features consistent with strongly-coupled rotational bands with K = 5/2. State-of-the-art shellmodel calculations with the modified LNPS effective interaction reproduce the observed levels remarkably well and suggest the dominance of 4-particle-4-hole neutron configurations for all the states. The data on the low-lying excited states of odd-mass 53−67Mn provide a textbook example of nuclear structure evolution from weak coupling through decoupling to strong coupling along a single isotopic chain on the n-rich side of the β stability line. These results help to deepen our understanding of the N = 40 “island of inversion”.

Published
2018

24. Evidence for coexisting shapes through lifetime measurements in 98Zr

Author

Singh, Purnima, Korten, Wolfram, Hagen, Trine Wiborg, Görgen, Andreas, Grente, Lucie, Salsac, Marie Delphine, Farget, F., Braunroth, T, Bruyneel, Bart, Celikovic, I, Clement, E, de France, G., Delaune, O, Dewald, Alfred, Dijon, Aurore, Delaroche, Jean Paul, Girod, Michel, Hackstein, Matthias, Jacquot, Bertrand, Libert, J., Litzinger, J, Ljungvall, Joa, Louchart, C, Gottardo, Andrea, Michelagnoli, Caterina, Napoli, D.R., Otsuka, Takaharu, Pillet, N., Recchia, Francesco, Rother, Wolfram, Sahin, Eda, Siem, Sunniva, Sulignano, B, Togashi, T., Theisen, Christophe, and Valiente-Dobón, Jose Javier

Subjects
Nuclear Experiment
Abstract

The lifetimes of the first excited 2þ, 4þ, and 6þ states in 98Zr were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in 98Zr were populated using the fission reaction between a 6.2 MeV=u 238U beam and a 9 Be target. The γ rays were detected with the EXOGAM array in correlation with the fission fragments identified by mass and atomic number in the VAMOS++ spectrometer. Our result shows a very small BðE2; 2þ 1 → 0þ 1 Þ value in 98Zr, thereby confirming the very sudden onset of collectivity at N ¼ 60. The experimental results are compared to large-scale Monte Carlo shell model and beyond-mean-field calculations. The present results indicate the coexistence of two additional deformed shapes in this nucleus along with the spherical ground state.

Published
2018

25. Evidence for Coexisting Shapes through Lifetime Measurements in $^{98}$Zr

Author

Singh, Purnima, Korten, W., Hagen, T.W., Görgen, A., Grente, L., Salsac, M.-D., Farget, F., Clément, E., De France, G., Braunroth, T., Bruyneel, B., Celikovic, I., Delaune, O., Dewald, A., Dijon, A., Delaroche, J.-P., Girod, M., Hackstein, M., Jacquot, B., Libert, J., Litzinger, J., Ljungvall, J., Louchart, C., Gottardo, A., Michelagnoli, C., Müller-Gatermann, C., Napoli, D.R., Otsuka, T., Pillet, N., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Togashi, T., Tsunoda, Y., Theisen, Ch., Valiente-Dobon, J.J., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics and Astronomy (all), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Nuclear Physics
Abstract

The lifetimes of the first excited 2^{+}, 4^{+}, and 6^{+} states in ^{98}Zr were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in ^{98}Zr were populated using the fission reaction between a 6.2 MeV/u ^{238}U beam and a ^{9}Be target. The γ rays were detected with the EXOGAM array in correlation with the fission fragments identified by mass and atomic number in the VAMOS++ spectrometer. Our result shows a very small B(E2;2_{1}^{+}→0_{1}^{+}) value in ^{98}Zr, thereby confirming the very sudden onset of collectivity at N=60. The experimental results are compared to large-scale Monte Carlo shell model and beyond-mean-field calculations. The present results indicate the coexistence of two additional deformed shapes in this nucleus along with the spherical ground state.

Published
2018
Full Text
View/download PDF

26. Study of isomeric states in $^{198,200,202,206}$Pb and $^{20}$Hg populated in fragmentation reactions

Author

Lalović, N., Rudolph, D., Arici, T., Bauer, Ch, Bazzacco, D., Bentley, M. A., Boutachkov, P., Bowry, M., Fahlander, C., Gadea, A., Gellanki, J., Givechev, A., Podolyák, Zs, Goel, N., Górska, M., Gottardo, A., Gregor, E., Guastalla, G., Habermann, T., Hackstein, M., Jungclaus, A., Kojouharov, I., Kumar, R., Sarmiento, L. G., Kurz, N., Lettmann, M., Lizarazo, C., Louchart, C., Merchán, E., Michelagnoli, C., Moeller, Th, Moschner, K., Patel, Z., Pietralla, N., Simpson, E. C., Pietri, S., Ralet, D., Reese, M., Regan, P. H., Reiter, P., Schaffner, H., Singh, P., Stahl, C., Stegmann, R., Stezowski, O., Alexander, T., Taprogge, J., Thöle, P., Wendt, A., Wieland, O., Wilson, E., Wood, R., Wollersheim, H-J, Birkenbach, B., Bruyneel, B., Burrows, I., Cortés, M. L., Clément, E., Désesquelles, P., Domingo-Pardo, C., Eberth, J., González, V., Hess, H., Jolie, J., Judson, D. S., Menegazzo, R., Mengoni, D., Gerl, J., Napoli, D. R., Pullia, A., Quintana, B., Rainovski, G., Salsac, M. D., Sanchis, E., Simpson, J., Dóbon, J J Valiente, AGATA collaboration, Golubev, P., and Ameil, F.

Subjects
ddc:530
Published
2018
Full Text
View/download PDF

27. Spectroscopic Study in Neutron-Rich Mn Isotopes Around the N = 40 “Island of Inversion”

Author

Ding, B., primary, Liu, Z., additional, Liu, X. Y., additional, Doornenbal, P., additional, Obertelli, A., additional, Lenzi, S. M., additional, Walker, P. M., additional, Chung, L. X., additional, Linh, B. D., additional, Authelet, G., additional, Baba, H., additional, Calvet, D., additional, Château, F., additional, Corsi, A., additional, Delbart, A., additional, Gheller, J.-M., additional, Gillibert, A., additional, Isobe, T., additional, Lapoux, V., additional, Matsushita, M., additional, Momiyama, S., additional, Motobayashi, T., additional, Niikura, M., additional, Nowacki, F., additional, Otsu, H., additional, Péron, C., additional, Peyaud, A., additional, Pollacco, E. C., additional, Roussé, J.-Y., additional, Sakurai, H., additional, Sasano, M., additional, Shiga, Y., additional, Takeuchi, S., additional, Taniuchi, R., additional, Uesaka, T., additional, Wang, H., additional, Yoneda, K., additional, Tang, X. D., additional, Lam, Y. H., additional, Huang, T. H., additional, Sun, M. D., additional, Zhang, W. Q., additional, Lu, H. Y., additional, Hou, D. S., additional, Browne, F., additional, Dombradi, Zs., additional, Franchoo, S., additional, Giacoppo, F., additional, Gottardo, A., additional, Hadynska-Klek, K., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Lee, J., additional, Lettmann, M., additional, Lozeva, R., additional, Matsui, K., additional, Miyazaki, T., additional, Nishimura, S., additional, Louchart, C., additional, Olivier, L., additional, Ota, S., additional, Patel, Z., additional, Sahin, E., additional, Santamaria, C., additional, Shand, C., additional, Söderström, P.-A., additional, Stefan, G. L., additional, Steppenbeck, D., additional, Sumikama, T., additional, Suzuki, D., additional, Vajta, Zs., additional, Werner, V., additional, Wu, J., additional, Xu, Z., additional, Zhou, X. H., additional, Zhang, Y. H., additional, Xu, H. S., additional, and Zhang, F. S., additional

Published
2019
Full Text
View/download PDF

28. Prominence of Pairing in Inclusive (p,2p) and (p,pn) Cross Sections from Neutron-Rich Nuclei

Author

Paul, N., primary, Obertelli, A., additional, Bertulani, C. A., additional, Corsi, A., additional, Doornenbal, P., additional, Rodriguez-Sanchez, J. L., additional, Authelet, G., additional, Baba, H., additional, Calvet, D., additional, Château, F., additional, Chen, S., additional, Delbart, A., additional, Gheller, J.-M., additional, Giganon, A., additional, Gillibert, A., additional, Isobe, T., additional, Lapoux, V., additional, Matsushita, M., additional, Momiyama, S., additional, Motobayashi, T., additional, Niikura, M., additional, Otsu, H., additional, Péron, C., additional, Peyaud, A., additional, Pollacco, E. C., additional, Roussé, J.-Y., additional, Sakurai, H., additional, Santamaria, C., additional, Sasano, M., additional, Shiga, Y., additional, Steppenbeck, D., additional, Takeuchi, S., additional, Taniuchi, R., additional, Uesaka, T., additional, Wang, H., additional, Yoneda, K., additional, Ando, T., additional, Arici, T., additional, Blazhev, A., additional, Browne, F., additional, Bruce, A. M., additional, Carroll, R., additional, Chung, L. X., additional, Cortés, M. L., additional, Dewald, M., additional, Ding, B., additional, Dombradi, Zs., additional, Flavigny, F., additional, Franchoo, S., additional, Giacoppo, F., additional, Górska, M., additional, Gottardo, A., additional, Hadynska-Klek, K., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Jungclaus, A., additional, Lee, J., additional, Lettmann, M., additional, Linh, B. D., additional, Liu, J., additional, Liu, Z., additional, Lizarazo, C., additional, Louchart, C., additional, Lozeva, R., additional, Matsui, K., additional, Miyazaki, T., additional, Moschner, K., additional, Nagamine, S., additional, Nakatsuka, N., additional, Nita, C., additional, Nishimura, S., additional, Nobs, C. R., additional, Olivier, L., additional, Ota, S., additional, Patel, Z., additional, Podolyák, Zs., additional, Rudigier, M., additional, Sahin, E., additional, Saito, T. Y., additional, Shand, C., additional, Söderström, P.-A., additional, Stefan, I. G., additional, Sumikama, T., additional, Suzuki, D., additional, Orlandi, R., additional, Vaquero, V., additional, Vajta, Zs., additional, Werner, V., additional, Wimmer, K., additional, Wu, J., additional, and Xu, Z., additional

Published
2019
Full Text
View/download PDF

29. Shell evolution beyond Z = 28 and N = 50: Spectroscopy of 81,82,83,84Zn

Author

Shand, C.M., Podolyák, Zs., Górska, M., Doornenbal, P., Obertelli, A., Nowacki, F., Otsuka, T., Sieja, K., Tostevin, J.A., Tsunoda, Y., Authelet, G., Baba, H., Calvet, D., Château, A., Chen, S., Corsi, A., Delbart, A., Gheller, J.M., Giganon, A., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Paul, N., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.-Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A.M., Carroll, R.J., Chung, L.X., Cortés, M.L., Dewald, M., Ding, B., Dombrádi, Zs., Flavigny, F., Franchoo, S., Giacoppo, F., Gottardo, A., Hadyńska-Klęk, K., Jungclaus, A., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Linh, B.D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, M., Nakatsuka, N., Nishimura, S., Nita, C.R., Nobs, C.R., Olivier, L., Ota, S., Orlandi, R., Patel, Z., Regan, P.H., Rudigier, M., Şahin, E., Saito, T., Söderström, P.-A., Stefan, I., Sumikama, T., Suzuki, D., Vajta, Zs., Vaquero, V., Werner, V., Wimmer, K., Wu, J., and Xu, Z.Y.

Published
2017
Full Text
View/download PDF

30. Evidence for Coexisting Shapes through Lifetime Measurements in Zr98

Author

Singh, Purnima, Korten, Wolfram, Hagen, T. W., Gorgen, Andreas, Grente, Lucie, Salsac, Marie Delphine, Farget, Fanny, Clement, Emmanuel, de France, Gilles, Braunroth, Thomas, Bruyneel, Bart, Čeliković, Igor T., Delaune, Olivier, Dewald, Alfred, Dijon, A., Delaroche, Jean Paul, Girod, Michel, Hackstein, Matthias, Jacquot, Bertrand, Libert, J., Litzinger, J., Ljungvall, Joa, Louchart, C., Gottardo, Andrea, Michelagnoli, Caterina, Muller-Gatermann, C, Napoli, Daniel R., Otsuka, Takaharu, Pillet, Nathalie, Recchia, Francesco, Rother, Wolfram, Sahin, E., Siem, Sunniva, Sulignano, Barbara, Togashi, Tomoaki, Tsunoda, Yuhsuke, Theisen, Christophe, Valiente-Dobon, Jose Javier, Singh, Purnima, Korten, Wolfram, Hagen, T. W., Gorgen, Andreas, Grente, Lucie, Salsac, Marie Delphine, Farget, Fanny, Clement, Emmanuel, de France, Gilles, Braunroth, Thomas, Bruyneel, Bart, Čeliković, Igor T., Delaune, Olivier, Dewald, Alfred, Dijon, A., Delaroche, Jean Paul, Girod, Michel, Hackstein, Matthias, Jacquot, Bertrand, Libert, J., Litzinger, J., Ljungvall, Joa, Louchart, C., Gottardo, Andrea, Michelagnoli, Caterina, Muller-Gatermann, C, Napoli, Daniel R., Otsuka, Takaharu, Pillet, Nathalie, Recchia, Francesco, Rother, Wolfram, Sahin, E., Siem, Sunniva, Sulignano, Barbara, Togashi, Tomoaki, Tsunoda, Yuhsuke, Theisen, Christophe, and Valiente-Dobon, Jose Javier

Abstract

The lifetimes of the first excited 2+, 4+, and 6+ states in Zr98 were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in Zr98 were populated using the fission reaction between a 6.2 MeV/u U238 beam and a Be9 target. The γ rays were detected with the EXOGAM array in correlation with the fission fragments identified by mass and atomic number in the VAMOS++ spectrometer. Our result shows a very small B(E2;21+→01+) value in Zr98, thereby confirming the very sudden onset of collectivity at N=60. The experimental results are compared to large-scale Monte Carlo shell model and beyond-mean-field calculations. The present results indicate the coexistence of two additional deformed shapes in this nucleus along with the spherical ground state. © 2018 American Physical Society.

Published
2018

31. Study of isomeric states in 198,200,202,206Pb and 206Hg populated in fragmentation reactions

Author

Lalović, Nataša, Rudolph, Dirk, Podolyák, Zsolt, Sarmiento Pico, Luis, Simpson, E.C., Alexander, T., Cortés, M.L., Gerl, J., Golubev, Pavel, Ameil, F., Arici, T., Bauer, Ch., Bazzacco, D., Bentley, M. A., Boutachkov, P., Bowry, M., Fahlander, Claes, Gadea, A., Gellanki, Jnaneswari, Givechev, A., Goel, N., Gorska, M., Gottardo, A., Gregor, E., Guastalla, G., Habermann, T., Hackstein, M., Jungclaus, A., Kojouharov, I., Kumar, R., Kurz, N., Lettmann, M., Lizarazo, C., Louchart, C., Merchán, E., Michelagnoli, C., Moeller, Th., Moschner, K., Patel, Z., Pietralla, N., Pietri, S., Ralet, D., Reese, M., Regan, P.H., Reiter, P., Schaffner, H., Singh, P., Stahl, C., Stegmann, R., Stezowski, O., AGATA collaboration, Lalović, Nataša, Rudolph, Dirk, Podolyák, Zsolt, Sarmiento Pico, Luis, Simpson, E.C., Alexander, T., Cortés, M.L., Gerl, J., Golubev, Pavel, Ameil, F., Arici, T., Bauer, Ch., Bazzacco, D., Bentley, M. A., Boutachkov, P., Bowry, M., Fahlander, Claes, Gadea, A., Gellanki, Jnaneswari, Givechev, A., Goel, N., Gorska, M., Gottardo, A., Gregor, E., Guastalla, G., Habermann, T., Hackstein, M., Jungclaus, A., Kojouharov, I., Kumar, R., Kurz, N., Lettmann, M., Lizarazo, C., Louchart, C., Merchán, E., Michelagnoli, C., Moeller, Th., Moschner, K., Patel, Z., Pietralla, N., Pietri, S., Ralet, D., Reese, M., Regan, P.H., Reiter, P., Schaffner, H., Singh, P., Stahl, C., Stegmann, R., Stezowski, O., and AGATA collaboration

Abstract

Isomeric states in isotopes in the vicinity of doubly-magic 208Pb were populated following reactions of a relativistic 208Pb primary beam impinging on a 9Be fragmentation target. Secondary beams of 198,200,202,206Pb and 206Hg were isotopically separated and implanted in a passive stopper positioned in the focal plane of the GSI Fragment Separator. Delayed γ rays were detected with the Advanced Gamma Tracking Array (AGATA). Decay schemes were re-evaluated and interpreted with shell-model calculations. The momentum-dependent population of isomeric states in the two-nucleon hole nuclei 206Pb/206Hg was found to differ from the population of multi neutron-hole isomeric states in 198,200,202Pb.

Published
2018

32. Study of isomeric states in Pb-198,Pb-200,Pb-202,Pb-206 and Hg-206 populated in fragmentation reactions

Author

Lalovic, N., Rudolph, D., Podolyak, Zs, Sarmiento, L. G., Simpson, E. C., Alexander, T., Cortes, M. L., Gerl, J., Golubev, P., Ameil, F., Arici, T., Bauer, Ch, Bazzacco, D., Bentley, M. A., Boutachkov, P., Bowry, M., Fahlander, C., Gadea, A., Gellanki, J., Givechev, A., Goel, N., Gorska, M., Gottardo, A., Gregor, E., Guastalla, G., Habermann, T., Hackstein, M., Jungclaus, A., Kojouharov, I., Kumar, R., Kurz, N., Lettmann, M., Lizarazo, C., Louchart, C., Merchan, E., Michelagnoli, C., Moeller, Th, Moschner, K., Patel, Z., Pietralla, N., Pietri, S., Ralet, D., Reese, M., Regan, P. H., Reiter, P., Schaffner, H., Singh, P., Stahl, C., Stegmann, R., Stezowski, O., Taprogge, J., Thoele, P., Wendt, A., Wieland, O., Wilson, E., Wood, R., Wollersheim, H-J, Birkenbach, B., Bruyneel, B., Burrows, I., Clement, E., Desesquelles, P., Domingo-Pardo, C., Eberth, J., Gonzalez, V., Hess, H., Jolie, J., Judson, D. S., Menegazzo, R., Mengoni, D., Napoli, D. R., Pullia, A., Quintana, B., Rainovski, G., Salsac, M. D., Sanchis, E., Simpson, J., Dobon, J. J. Valiente, Lalovic, N., Rudolph, D., Podolyak, Zs, Sarmiento, L. G., Simpson, E. C., Alexander, T., Cortes, M. L., Gerl, J., Golubev, P., Ameil, F., Arici, T., Bauer, Ch, Bazzacco, D., Bentley, M. A., Boutachkov, P., Bowry, M., Fahlander, C., Gadea, A., Gellanki, J., Givechev, A., Goel, N., Gorska, M., Gottardo, A., Gregor, E., Guastalla, G., Habermann, T., Hackstein, M., Jungclaus, A., Kojouharov, I., Kumar, R., Kurz, N., Lettmann, M., Lizarazo, C., Louchart, C., Merchan, E., Michelagnoli, C., Moeller, Th, Moschner, K., Patel, Z., Pietralla, N., Pietri, S., Ralet, D., Reese, M., Regan, P. H., Reiter, P., Schaffner, H., Singh, P., Stahl, C., Stegmann, R., Stezowski, O., Taprogge, J., Thoele, P., Wendt, A., Wieland, O., Wilson, E., Wood, R., Wollersheim, H-J, Birkenbach, B., Bruyneel, B., Burrows, I., Clement, E., Desesquelles, P., Domingo-Pardo, C., Eberth, J., Gonzalez, V., Hess, H., Jolie, J., Judson, D. S., Menegazzo, R., Mengoni, D., Napoli, D. R., Pullia, A., Quintana, B., Rainovski, G., Salsac, M. D., Sanchis, E., Simpson, J., and Dobon, J. J. Valiente

Abstract

Isomeric states in isotopes in the vicinity of doubly-magic Pb-208 were populated following reactions of a relativistic Pb-208 primary beam impinging on a Be-9 fragmentation target. Secondary beams of Pb-198,Pb-200,Pb-202,Pb-206 and Hg-206 were isotopically separated and implanted in a passive stopper positioned in the focal plane of the GSI Fragment Separator. Delayed gamma rays were detected with the Advanced Gamma Tracking Array (AGATA). Decay schemes were reevaluated and interpreted with shell-model calculations. The momentum-dependent population of isomeric states in the two-nucleon hole nuclei Pb-206/Hg-206 was found to differ from the population of multi neutron-hole isomeric states in Pb-198,Pb-200,Pb-202.

Published
2018

33. Lifetimes of excited states in triaxially deformed Tc-107 and Rh-109,Rh-111,Rh-113

Author

Hagen, T. W., Gorgen, A., Korten, W., Grente, L., Salsac, M. -D., Farget, F., Braunroth, T., Bruyneel, B., Celikovic, I., Clement, E., de France, G., Delaune, O., Dewald, A., Dijon, A., Hackstein, M., Jacquot, B., Litzinger, J., Ljungvall, J., Louchart, C., Michelagnoli, C., Napoli, D. R., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Theisen, Ch., Valiente-Dobon, J. J., Hagen, T. W., Gorgen, A., Korten, W., Grente, L., Salsac, M. -D., Farget, F., Braunroth, T., Bruyneel, B., Celikovic, I., Clement, E., de France, G., Delaune, O., Dewald, A., Dijon, A., Hackstein, M., Jacquot, B., Litzinger, J., Ljungvall, J., Louchart, C., Michelagnoli, C., Napoli, D. R., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Theisen, Ch., and Valiente-Dobon, J. J.

Abstract

Lifetimes of excited states in Tc-107, Rh-109, Rh-111, and Rh-113 were measured at GANIL using the Recoil-Distance Doppler Shift method. The neutron-rich nuclei were produced in fission reactions in inverse kinematics with a U-238 beam impinging on a Be-9 target. Fission fragments were identified event-by-event in the ray-tracing spectrometer VAMOS++ and correlated with prompt gamma rays observed around the target position with the EXOGAM Ge detector array. Several lifetimes were obtained for states in the positiveparity yrast bands in the four nuclei and compared to triaxial particle-rotor calculations. The results clarify the configuration for the strongest positive-parity band in Tc-107 and suggest a gradual increase of triaxial deformation with atomic number Z, reaching almost maximum triaxiality for the neutron-rich Rh nuclei.

Published
2018

34. Evidence for Coexisting Shapes through Lifetime Measurements in Zr-98

Author

Singh, Purnima, Korten, W., Hagen, T. W., Gorgen, A., Grente, L., Salsac, M-D, Farget, F., Clement, E., de France, G., Braunroth, T., Bruyneel, B., Celikovic, I, Delaune, O., Dewald, A., Dijon, A., Delaroche, J-P, Girod, M., Hackstein, M., Jacquot, B., Libert, J., Litzinger, J., Ljungvall, J., Louchart, C., Gottardo, A., Michelagnoli, C., Mueller-Gatermann, C., Napoli, D. R., Otsuka, T., Pillet, N., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Togashi, T., Tsunoda, Y., Theisen, Ch, Valiente-Dobon, J. J., Singh, Purnima, Korten, W., Hagen, T. W., Gorgen, A., Grente, L., Salsac, M-D, Farget, F., Clement, E., de France, G., Braunroth, T., Bruyneel, B., Celikovic, I, Delaune, O., Dewald, A., Dijon, A., Delaroche, J-P, Girod, M., Hackstein, M., Jacquot, B., Libert, J., Litzinger, J., Ljungvall, J., Louchart, C., Gottardo, A., Michelagnoli, C., Mueller-Gatermann, C., Napoli, D. R., Otsuka, T., Pillet, N., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Togashi, T., Tsunoda, Y., Theisen, Ch, and Valiente-Dobon, J. J.

Abstract

The lifetimes of the first excited 2(+), 4(+), and 6(+) states in Zr-98 were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in Zr-98 were populated using the fission reaction between a 6.2 MeV/u U-238 beam and a Be-9 target. The gamma rays were detected with the EXOGAM array in correlation with the fission fragments identified by mass and atomic number in the VAMOS++ spectrometer. Our result shows a very small B(E2; 2(1)(+) -> 0(1)(+)) value in Zr-98, thereby confirming the very sudden onset of collectivity at N = 60. The experimenta(l) results are compared to large-scale Monte Carlo shell model and beyond-mean-field calculations. The present results indicate the coexistence of two additional deformed shapes in this nucleus along with the spherical ground State.

Published
2018

35. Persistence of the $Z=28$ Shell Gap Around $^{78}\mathrm{Ni}$: First Spectroscopy of $^{79}\mathrm{Cu}$

Author

Olivier, L., Franchoo, S., Niikura, M., Vajta, Z., Sohler, D., Doornenbal, P., Obertelli, A., Tsunoda, Y., Otsuka, T., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Otsu, H., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Browne, F., Chung, L.X., Dombradi, Z., Flavigny, F., Giacoppo, F., Gottardo, A., Hadyńska-Klęk, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Ogata, K., Ota, S., Patel, Z., Sahin, E., Shand, C., Söderström, P.A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Werner, V., Wu, J., Xu, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 Theory, Physics::Accelerator Physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; In-beam γ-ray spectroscopy of Cu79 is performed at the Radioactive Isotope Beam Factory of RIKEN. The nucleus of interest is produced through proton knockout from a Zn80 beam at 270 MeV/nucleon. The level scheme up to 4.6 MeV is established for the first time and the results are compared to Monte Carlo shell-model calculations. We do not observe significant knockout feeding to the excited states below 2.2 MeV, which indicates that the Z=28 gap at N=50 remains large. The results show that the Cu79 nucleus can be described in terms of a valence proton outside a Ni78 core, implying the magic character of the latter.

Published
2017
Full Text
View/download PDF

36. Evidence for Coexisting Shapes through Lifetime Measurements in Zr98

Author

Singh, Purnima, primary, Korten, W., additional, Hagen, T. W., additional, Görgen, A., additional, Grente, L., additional, Salsac, M.-D., additional, Farget, F., additional, Clément, E., additional, de France, G., additional, Braunroth, T., additional, Bruyneel, B., additional, Celikovic, I., additional, Delaune, O., additional, Dewald, A., additional, Dijon, A., additional, Delaroche, J.-P., additional, Girod, M., additional, Hackstein, M., additional, Jacquot, B., additional, Libert, J., additional, Litzinger, J., additional, Ljungvall, J., additional, Louchart, C., additional, Gottardo, A., additional, Michelagnoli, C., additional, Müller-Gatermann, C., additional, Napoli, D. R., additional, Otsuka, T., additional, Pillet, N., additional, Recchia, F., additional, Rother, W., additional, Sahin, E., additional, Siem, S., additional, Sulignano, B., additional, Togashi, T., additional, Tsunoda, Y., additional, Theisen, Ch., additional, and Valiente-Dobon, J. J., additional

Published
2018
Full Text
View/download PDF

37. Erratum: Persistence of the Z=28 Shell Gap Around Ni78 : First Spectroscopy of Cu79 [Phys. Rev. Lett. 119 , 192501 (2017)]

Author

Olivier, L., primary, Franchoo, S., additional, Niikura, M., additional, Vajta, Z., additional, Sohler, D., additional, Doornenbal, P., additional, Obertelli, A., additional, Tsunoda, Y., additional, Otsuka, T., additional, Authelet, G., additional, Baba, H., additional, Calvet, D., additional, Château, F., additional, Corsi, A., additional, Delbart, A., additional, Gheller, J.-M., additional, Gillibert, A., additional, Isobe, T., additional, Lapoux, V., additional, Matsushita, M., additional, Momiyama, S., additional, Motobayashi, T., additional, Otsu, H., additional, Péron, C., additional, Peyaud, A., additional, Pollacco, E. C., additional, Roussé, J.-Y., additional, Sakurai, H., additional, Santamaria, C., additional, Sasano, M., additional, Shiga, Y., additional, Takeuchi, S., additional, Taniuchi, R., additional, Uesaka, T., additional, Wang, H., additional, Yoneda, K., additional, Browne, F., additional, Chung, L. X., additional, Dombradi, Z., additional, Flavigny, F., additional, Giacoppo, F., additional, Gottardo, A., additional, Hadyńska-Klęk, K., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Lee, J., additional, Lettmann, M., additional, Louchart, C., additional, Lozeva, R., additional, Matsui, K., additional, Miyazaki, T., additional, Nishimura, S., additional, Ogata, K., additional, Ota, S., additional, Patel, Z., additional, Sahin, E., additional, Shand, C., additional, Söderström, P.-A., additional, Stefan, I., additional, Steppenbeck, D., additional, Sumikama, T., additional, Suzuki, D., additional, Werner, V., additional, Wu, J., additional, and Xu, Z., additional

Published
2018
Full Text
View/download PDF

38. Inelastic scattering of neutron-rich Ni and Zn isotopes off a proton target

Author

Cortés, M. L., primary, Doornenbal, P., additional, Dupuis, M., additional, Lenzi, S. M., additional, Nowacki, F., additional, Obertelli, A., additional, Péru, S., additional, Pietralla, N., additional, Werner, V., additional, Wimmer, K., additional, Authelet, G., additional, Baba, H., additional, Calvet, D., additional, Château, F., additional, Corsi, A., additional, Delbart, A., additional, Gheller, J-M., additional, Gillibert, A., additional, Isobe, T., additional, Lapoux, V., additional, Louchart, C., additional, Matsushita, M., additional, Momiyama, S., additional, Motobayashi, T., additional, Niikura, M., additional, Otsu, H., additional, Péron, C., additional, Peyaud, A., additional, Pollacco, E. C., additional, Roussé, J-Y., additional, Sakurai, H., additional, Santamaria, C., additional, Sasano, M., additional, Shiga, Y., additional, Takeuchi, S., additional, Taniuchi, R., additional, Uesaka, T., additional, Wang, H., additional, Yoneda, K., additional, Browne, F., additional, Chung, L. X., additional, Dombradi, Zs., additional, Franchoo, S., additional, Giacoppo, F., additional, Gottardo, A., additional, Hadynska-Klek, K., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Lee, J., additional, Lettmann, M., additional, Lozeva, R., additional, Matsui, K., additional, Miyazaki, T., additional, Nishimura, S., additional, Olivier, L., additional, Ota, S., additional, Patel, Z., additional, Sahin, E., additional, Shand, C. M., additional, Söderström, P-A., additional, Stefan, I., additional, Steppenbeck, D., additional, Sumikama, T., additional, Suzuki, D., additional, Vajta, Zs., additional, Wu, J., additional, and Xu, Z., additional

Published
2018
Full Text
View/download PDF

39. Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

Author

Hagen, T. W., Goergen, A., Korten, W., Grente, L., Salsac, M. -D., Farget, F., Ragnarsson, I., Braunroth, T., Bruyneel, B., Celikovic, I., Clement, E., de France, G., Delaune, O., Dewald, A., Dijon, A., Hackstein, M., Jacquot, B., Litzinger, J., Ljungvall, J., Louchart, C., Michelagnoli, C., Napoli, D. R., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Theisen, Ch., Valiente-Dobon, J. J., Hagen, T. W., Goergen, A., Korten, W., Grente, L., Salsac, M. -D., Farget, F., Ragnarsson, I., Braunroth, T., Bruyneel, B., Celikovic, I., Clement, E., de France, G., Delaune, O., Dewald, A., Dijon, A., Hackstein, M., Jacquot, B., Litzinger, J., Ljungvall, J., Louchart, C., Michelagnoli, C., Napoli, D. R., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Theisen, Ch., and Valiente-Dobon, J. J.

Abstract

Lifetimes of excited states in Y-99, Y-101, Nb-101, Nb-103, and Nb-105 were measured in an experiment using the recoil distance Doppler shift method at GANIL (Grand Accelerateur National d'Ions Lourds). The neutron-rich nuclei were produced in fission reactions between a U-238 beam and a Be-9 target. Prompt gamma rays were measured with the EXOGAM array and correlated with fission fragments that were identified in mass and atomic number with the VAMOS++ spectrometer. The measured lifetimes, together with branching ratios, provide B(M1) and B(E2) values for the strongly coupled rotational bands built on the [422] 5/2(+) ground state in the Y and Nb nuclei with neutron number N >= 60. The comparison of the experimental results with triaxial particle-rotor calculations provides information about the evolution of the nuclear shape in this mass region.

Published
2017

40. Shell evolution beyond Z=28 and N=50: Spectroscopy of Zn-81,Zn-82,Zn-83,Zn-84

Author

Shand, C. M., Podolyak, Zs., Gorska, M., Doornenbal, P., Obertelli, A., Nowacki, F., Otsuka, T., Sieja, K., Tostevin, J. A., Tsunoda, Y., Authelet, G., Baba, H., Calvet, D., Chateau, A., Chenh, S., Corsi, A., Delbart, A., Gheller, J. M., Giganon, A., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Paul, N., Peron, C., Peyaud, A., Pollacco, E. C., Rousse, J. -Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A. M., Carroll, R. J., Chung, L. X., Cortes, M. L., Dewald, M., Ding, B., Dombradi, Zs., Flavigny, F., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Jungclaus, A., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Linh, B. D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, M., Nakatsuka, N., Nishimura, S., Nita, C. R., Nobs, C. R., Olivier, L., Ota, S., Orlandi, R., Patel, Z., Regan, P. H., Rudigier, M., Sahin, E., Saito, T., Soderstrom, P. -A., Stefan, I., Sumikama, T., Suzuki, D., Vajta, Zs., Vaquero, V., Werner, V., Wimmer, K., Wu, J., Xu, Z. Y., Shand, C. M., Podolyak, Zs., Gorska, M., Doornenbal, P., Obertelli, A., Nowacki, F., Otsuka, T., Sieja, K., Tostevin, J. A., Tsunoda, Y., Authelet, G., Baba, H., Calvet, D., Chateau, A., Chenh, S., Corsi, A., Delbart, A., Gheller, J. M., Giganon, A., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Paul, N., Peron, C., Peyaud, A., Pollacco, E. C., Rousse, J. -Y., Sakurai, H., Santamaria, C., Sasano, M., Shiga, Y., Steppenbeck, D., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Ando, T., Arici, T., Blazhev, A., Browne, F., Bruce, A. M., Carroll, R. J., Chung, L. X., Cortes, M. L., Dewald, M., Ding, B., Dombradi, Zs., Flavigny, F., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Jungclaus, A., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Linh, B. D., Liu, J., Liu, Z., Lizarazo, C., Louchart, C., Lozeva, R., Matsui, K., Miyazaki, T., Moschner, K., Nagamine, M., Nakatsuka, N., Nishimura, S., Nita, C. R., Nobs, C. R., Olivier, L., Ota, S., Orlandi, R., Patel, Z., Regan, P. H., Rudigier, M., Sahin, E., Saito, T., Soderstrom, P. -A., Stefan, I., Sumikama, T., Suzuki, D., Vajta, Zs., Vaquero, V., Werner, V., Wimmer, K., Wu, J., and Xu, Z. Y.

Abstract

We report on the measurement of new low-lying states in the neutron-rich Zn-81,Zn-82,Zn-83,Zn-84 nuclei via inbeam gamma-ray spectroscopy. These include the 4(1)(+)-> 2(1)(+) transition in Zn-82, the 2(1)(+) -> 0(g.s.)(+) and 4(1)(+)-> 2(1)(+) transitions in Zn-84, and low-lying states in Zn-81,Zn-83 were observed for the first time. The reduced E(2(1)(+)) energies and increased E(4(1)(+))/ E(2(1)(+)) ratios at N= 52, 54 compared to those in Zn-80 attest that the magicity is confined to the neutron number N= 50only. The deduced level schemes are compared to three state-of-the-art shell model calculations and a good agreement is observed with all three calculations. The newly observed 2(+) and 4(+) levels in Zn-84 suggest the onset of deformation towards heavier Zn isotopes, which has been incorporated by taking into account the upper sdgorbitals in the Ni78-II and the PFSDG-U models. (C) 2017 The Authors. Published by Elsevier B.V.

Published
2017

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

Author

Morfouace, P., Franchoo, S., Sieja, K., Matea, I., Nalpas, L., Niikura, M., Sánchez-Benítez, A.M., Stefan, I., Assié, M., Azaiez, F., Beaumel, D., Boissinot, S., Borcea, C., Borcea, R., Burgunder, G., Cáceres, L., De Séréville, N., Dombrádi, Zs., Elseviers, J., Fernández-Domínguez, B., Gillibert, A., Giron, S., Grévy, S., Hammache, F., Kamalou, O., Lapoux, V., Lefebvre, L., Lepailleur, A., Louchart, C., Marquinez-Duran, G., Martel, I., Matta, A., Mengoni, D., Napoli, D.R., Recchia, F., Scarpaci, J.-A., Sohler, D., Sorlin, O., Stanoiu, M., Stodel, C., Thomas, J.-C., and Vajta, Zs.

Published
2015
Full Text
View/download PDF

42. Persistence of the Z=28 Shell Gap Around Ni78 : First Spectroscopy of Cu79

Author

Olivier, L., primary, Franchoo, S., additional, Niikura, M., additional, Vajta, Z., additional, Sohler, D., additional, Doornenbal, P., additional, Obertelli, A., additional, Tsunoda, Y., additional, Otsuka, T., additional, Authelet, G., additional, Baba, H., additional, Calvet, D., additional, Château, F., additional, Corsi, A., additional, Delbart, A., additional, Gheller, J.-M., additional, Gillibert, A., additional, Isobe, T., additional, Lapoux, V., additional, Matsushita, M., additional, Momiyama, S., additional, Motobayashi, T., additional, Otsu, H., additional, Péron, C., additional, Peyaud, A., additional, Pollacco, E. C., additional, Roussé, J.-Y., additional, Sakurai, H., additional, Santamaria, C., additional, Sasano, M., additional, Shiga, Y., additional, Takeuchi, S., additional, Taniuchi, R., additional, Uesaka, T., additional, Wang, H., additional, Yoneda, K., additional, Browne, F., additional, Chung, L. X., additional, Dombradi, Z., additional, Flavigny, F., additional, Giacoppo, F., additional, Gottardo, A., additional, Hadyńska-Klęk, K., additional, Korkulu, Z., additional, Koyama, S., additional, Kubota, Y., additional, Lee, J., additional, Lettmann, M., additional, Louchart, C., additional, Lozeva, R., additional, Matsui, K., additional, Miyazaki, T., additional, Nishimura, S., additional, Ogata, K., additional, Ota, S., additional, Patel, Z., additional, Sahin, E., additional, Shand, C., additional, Söderström, P.-A., additional, Stefan, I., additional, Steppenbeck, D., additional, Sumikama, T., additional, Suzuki, D., additional, Werner, V., additional, Wu, J., additional, and Xu, Z., additional

Published
2017
Full Text
View/download PDF

43. Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

Author

Hagen, T. W., primary, Görgen, A., additional, Korten, W., additional, Grente, L., additional, Salsac, M.-D., additional, Farget, F., additional, Ragnarsson, I., additional, Braunroth, T., additional, Bruyneel, B., additional, Celikovic, I., additional, Clément, E., additional, de France, G., additional, Delaune, O., additional, Dewald, A., additional, Dijon, A., additional, Hackstein, M., additional, Jacquot, B., additional, Litzinger, J., additional, Ljungvall, J., additional, Louchart, C., additional, Michelagnoli, C., additional, Napoli, D. R., additional, Recchia, F., additional, Rother, W., additional, Sahin, E., additional, Siem, S., additional, Sulignano, B., additional, Theisen, Ch., additional, and Valiente-Dobon, J. J., additional

Published
2017
Full Text
View/download PDF

44. Extension of the N=40 Island of Inversion towards N=50: Spectroscopy of Cr66, Fe70,72

Author

Santamaria, C., Louchart, C., Obertelli, A., Werner, V., Doornenbal, P., Nowacki, F., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.-M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Otsu, H., Péron, C., Peyaud, A., Pollacco, E. C., Roussé, J.-Y., Sakurai, H., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Browne, F., Chung, L. X., Dombradi, Zs., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Lozeva, Radomira, Matsui, K., Miyazaki, T., Nishimura, S., Olivier, L., Ota, S., Patel, Z., Pietralla, N., Sahin, E., Shand, C., Söderström, P.-A., Stefan, I., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs., Wu, J., Xu, Z., 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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 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)

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

International audience; We report on the measurement of the first 2+ and 4+ states of Cr66 and Fe70,72 via in-beam γ-ray spectroscopy. The nuclei of interest were produced by (p,2p) reactions at incident energies of 260 MeV/nucleon. The experiment was performed at the Radioactive Isotope Beam Factory, RIKEN, using the DALI 2γ-ray detector array and the novel MINOS device, a thick liquid hydrogen target combined with a vertex tracker. A low-energy plateau of 2+1 and 4+1 energies as a function of the neutron number was observed for N≥38 and N≥40 for even-even Cr and Fe isotopes, respectively. State-of-the-art shell model calculations with a modified Lenzi-Nowacki-Poves-Sieja (LNPS) interaction in the pfg9/2d5/2 valence space reproduce the observations. Interpretation within the shell model shows an extension of the island of inversion at N=40 for more neutron-rich isotopes towards N=50.

Published
2015
Full Text
View/download PDF

45. Lifetime measurements on fission fragments in the A similar to 100 region

Author

Grente, L., Salsac, M. D., Wolfram KORTEN, Goergen, A., Hagen, T. W., Braunroth, T., Bruyneel, B., Celikovic, I., Clement, E., Delaune, O., Dijon, A., Drouart, A., Ertuerk, S., Farget, F., France, G., Gottardo, A., Hackstein, M., Jacquot, B., Libert, J., Litzinger, J., Ljungvall, J., Louchart, C., Michelagnoli, C., Napoli, D. R., Navin, A., Pillet, N., Pipidis, A., Recchia, F., Rejmund, M., Rother, W., Sahin, E., Schmitt, C., Siem, S., Sulignano, B., Valiente-Dobon, J. J., Zell, K. O., Chatillon, A, Farget, F, Faust, H, Fioni, G, Goutte, D, Goutte, H, Napoli, Daniel Ricardo -- 0000-0002-8154-6958, KORTEN, Wolfram -- 0000-0002-3940-0816, Delaune, Olivier -- 0000-0002-1087-2342, Celikovic, Igor -- 0000-0002-5642-4393, Gorgen, Andreas -- 0000-0003-1916-9941, Recchia, Francesco -- 0000-0002-8428-0112, de France, Gilles -- 0000-0002-7439-1759, Clement, Emmanuel -- 0000-0003-1887-717X, Sahin, Eda -- 0000-0003-0683-5140, GOTTARDO, Andrea -- 0000-0002-0390-5767, and [Grente, L. -- Salsac, M. -D. -- Korten, W. -- Bruyneel, B. -- Drouart, A. -- Louchart, C. -- Sulignano, B.] CEA Saclay, IRFU Serv Phys Nucl, F-91191 Gif Sur Yvette, France -- [Goergen, A. -- Hagen, T. W. -- Siem, S.] Univ Oslo, Dept Phys, N-0316 Oslo, Norway -- [Braunroth, T. -- Hackstein, M. -- Litzinger, J. -- Rother, W. -- Zell, K. O.] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany -- [Celikovic, I. -- Clement, E. -- Delaune, O. -- Dijon, A. -- Farget, F. -- de France, G. -- Jacquot, B. -- Navin, A. -- Rejmund, M. -- Schmitt, C.] GANIL, CEA DSM, CNRS IN2P3, F-14706 Caen, France -- [Celikovic, I.] Univ Belgrade, Inst Nucl Sci VINCA, YU-11000 Belgrade, Serbia -- [Ertuerk, S.] Nigde Univ, Fac Sci, Nigde, Turkey -- [Gottardo, A. -- Michelagnoli, C. -- Napoli, D. R. -- Pipidis, A. -- Recchia, F. -- Sahin, E. -- Valiente-Dobon, J. J.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy -- [Libert, J. -- Pillet, N.] CEA, DAM, DIF, F-91297 Arpajon, France -- [Ljungvall, J.] Univ Paris 11, F-91405 Orsay, France -- [Ljungvall, J.] CNRS, CSNSM, IN2P3, F-91405 Orsay, France

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

5th International Workshop on Nuclear Fission and Fission Product Spectroscopy (FISSION) -- MAY 28-31, 2013 -- Caen, FRANCE, WOS: 000342384500002, Lifetimes of first 4(+) and 6(+) states have been measured in neutron-rich isotopes of Zr, Mo, Ru and Pd using the recoil distance Doppler shift method at GANIL. The nuclei were produced through a fusion-fission reaction in inverse kinematics. The fission fragments were fully identified in the large-acceptance VAMOS spectrometer and gamma -rays were detected in coincidence with the EXOGAM germanium array. Lifetimes of excited states in the range of 1-100 ps were measured with the Cologne plunger. Preliminary lifetime results are presented as well as a discussion on the evolution of the collectivity in this region., ILL, CEA DSM & DAM, CNRS IN2P3, ENSICAEN, GANIL, Scientific and Technological Council of Turkey [210T043], S. Erturk acknowledges the Scientific and Technological Council of Turkey for their support with project number 210T043.

Published
2013

46. ISOMERIC RATIOS IN Hg-206

Author

Alexander, T, Podolyak, Z, Cortes, ML, Gerl, J, Rudolph, D, Sarmiento, LG, Ameil, F, Arici, T, Bazzacco, D, Bauer, C, Bentley, MA, Blazhev, A, Bowry, M, Boutachkov, P, Carroll, R, Fahlander, C, Gadea, A, Gellanki, J, Gelletly, W, Givechev, A, Goel, N, Golubev, P, Gorska, M, Gottardo, A, Gregor, E, Guastalla, G, Habermann, T, Hackstein, M, Jungclaus, A, Kojouharov, I, Korten, W, Kumar, S, Kurz, N, Lalovic, N, Lettmann, M, Lizarazo, C, Louchart, C, Mandal, S, Merchan, E, Michelagnoli, C, Moeller, T, Moschner, K, Patel, Z, Pietralla, N, Pietri, S, Ralet, D, Reese, M, Regan, PH, Reiter, P, Schaffner, H, Singh, P, Stahl, C, Stegmann, R, Stezowksi, O, Taprogge, J, Thoele, P, Walker, PM, Wieland, O, Wendt, A, Wilson, E, Wood, R, and Wollersheim, H-J

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

206Hg was populated in the fragmentation of an E∕A = 1 GeV 208Pb beam at GSI. It was part of a campaign to study nuclei around 208Pb via relativistic Coulomb excitation. The observation of the known isomeric states confirmed the identification of the fragmentation products. The isomeric decays were also used to prove that the correlations between beam identification detectors and the AGATA γ-ray tracking array worked properly and that the tracking efficiency was independent of the time relative to the prompt flash.

Published
2015

47. Shell evolution beyond N=40: Cu 69,71,73

Author

Sahin, E., Doncel, M., Sieja, K., De Angelis, G., Gadea, A., Quintana, B., Görgen, A., Modamio, V., Mengoni, Daniele, Valiente Dobón, J. J., John, P. R., Albers, M., Bazzacco, D., Benzoni, G., Birkenbach, B., Cederwall, B., Clément, E., Curien, D., Corradi, L., Désesquelles, P., Dewald, A., Didierjean, F., Duchêne, G., Eberth, J., Erduran, M. N., Farnea, E., Fioretto, E., De France, G., Fransen, C., Gernhäuser, R., Gottardo, A., Hackstein, M., Hagen, T., Hernández Prieto, A., Hess, H., Hüyük, T., Jungclaus, A., Klupp, S., Korten, W., Kusoglu, A., Lenzi, SILVIA MONICA, Ljungvall, J., Louchart, C., Lunardi, Santo, Menegazzo, R., Michelagnoli, C., Mijatović, T., Million, B., Molini, P., Montagnoli, Giovanna, Montanari, D., Möller, O., Napoli, D. R., Obertelli, A., Orlandi, R., Pollarolo, G., Pullia, A., Recchia, Francesco, Reiter, P., Rosso, D., Rother, W., Salsac, M. D., Scarlassara, F., Schlarb, M., Siem, S., Singh, P. P., Söderström, P. A., Stefanini, A. M., Stézowski, O., Sulignano, B., Szilner, S., Theisen, C., C. A., Ur, and Yalcinkaya, M.

Published
2015

48. Shell evolution beyond N = 40: $^{69,71,73}$Cu

Author

Sahin, E., Doncel, M., Sieja, K., de Angelis, G., Gadea, A., Quintana, B., Gorgen, A., Modamio, V., Mengoni, D., Valiente-Dobon, J.J., John, P.R., Albers, M., Bazzacco, D., Benzoni, G., Birkenbach, B., Cederwall, B., Clement, E., Curien, D., Corradi, L., Desesquelles, P., Dewald, A., Didierjean, F., Duchene, G., Eberth, J., Erduran, M.N., Farnea, E., Fioretto, E., de France, G., Fransen, C., Gernhauser, R., Gottardo, A., Hackstein, M., Hagen, T., Hernandez-Prieto, A., Hess, H., Huyuk, T., Jungclaus, A., Klupp, S., Korten, W., Kusoglu, A., Lenzi, S. M., Ljungvall, J., Louchart, C., Lunardi, S., Menegazzo, R., Michelagnoli, C., Mijatović, Tea, Million, B., Molini, P., Montagnoli, G., Montanari, D., Moller, O., Napoli, D. R., Obertelli, A., Orlandi, R., Pollarolo, G., Pullia, A., Recchia, F., Reiter, P., Rosso, D., Rother, W., Salsac, M.-D., Scarlassara, F., Schlarb, M., Siem, S., Singh, Pushpendra P., Soderstrom, P.-A., Stefanini, A.M., Stezowski, O., Sulignano, B., Szilner, Suzana, Theisen, Ch., Ur, C.A., Yalcinkaya, M., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université 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)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
21.10.Tg, 21.60.Cs, 23.20.Lv, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], multinucleon transfer reactions, AGATA Demonstrator, recoil-distance Doppler-shift method, Nuclear Experiment
Abstract

International audience; The level structure of the neutron-rich 69Cu, 71Cu, and 73Cu isotopes has been investigated by means ofmultinucleon transfer reactions. The experiment was performed at Laboratori Nazionali di Legnaro using theAGATA Demonstrator array coupled to the PRISMA magnetic spectrometer. Lifetimes of excited states inCu nuclei were measured with the recoil-distance Doppler-shift method. The resulting electromagnetic matrixelements for transitions from excited states in 69,71,73Cu nuclei are used to assess the collective or single-particlecharacter of these states. The results are compared with predictions of large-scale shell-model calculations, givingfurther insight into the evolution of the proton pf shell as neutrons fill the 1g9/2 orbital.

Published
2015
Full Text
View/download PDF

49. Analysis of the Response of AGATA Detectors at GSI

Author

Lalović, N., Perez-Vidal, R. M., Louchart, C., Michelagnoli, C., Ralet, D., Arici, T., Bazzacco, D., Clément, E., Gadea, A., Gerl, J., Kojouharov, I., Korichi, A., Labiche, M., Ljungvall, J., Lopez-Martens, A., Nyberg, J., Pietralla, N., Pietri, S., Rudolph, D., Stezowski, O., Schwengner, R., Zuber, K., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), AGATA, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université 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)-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), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Engineering, Spectrometer, business.industry, Physics, QC1-999, Detector, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Tracking (particle physics), Engineering physics, Physical Sciences, Fysik, AGATA, Aerospace engineering, business
Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence 4.0; International audience; In 2012 and 2014 the γ-ray tracking spectrometer AGATA was operated at the SIS/FRS facility atGSI in Darmstadt, Germany. The performance of the array is discussed, outlining some important aspects ofthe offline data processing and analysis. Relying on the data obtained from measurements with standard γ-raysources, a first estimate of the photopeak efficiency and peak-to-total (P/T) is presented.

Published
2015
Full Text
View/download PDF

50. Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies

Author

Podolyák, Zs, Shand, C. M., Lalovic, Natasa, Gerl, J., Rudolph, D., Alexander, T., Boutachkov, P., Cortés, M. L., Górska, M., Kojouharov, I., Kurz, N., Louchart, C., Merchán, E., Michelagnoli, C., Pérez-Vidal, R. M., Pietri, S., Ralet, D., Reese, M., Schaffner, H., Stahl, Ch, Weick, H., Ameil, F., De Angelis, G., Arici, T., Carroll, R., Dombrádi, Zs, Gadea, A., Golubev, P., Lettmann, M., Lizarazo, C., Mahboub, D., Pai, H., Patel, Z., Pietralla, N., Regan, P. H., Sarmiento, L. G., Wieland, O., Wilson, E., Birkenbach, B., Bruyneel, B., Burrows, I., Charles, L., Clément, E., Crespi, F. C L, Cullen, D. M., Désesquelles, P., Eberth, J., González, V., Habermann, T., Harkness-Brennan, L., Hess, H., Judson, D. S., Jungclaus, A., Korten, W., Labiche, M., Maj, A., Mengoni, D., Napoli, D. R., Pullia, A., Quintana, B., Rainovski, G., Reiter, P., Salsac, M. D., Sanchis, E., Valiente Dóbon, J. J., Podolyák, Zs, Shand, C. M., Lalovic, Natasa, Gerl, J., Rudolph, D., Alexander, T., Boutachkov, P., Cortés, M. L., Górska, M., Kojouharov, I., Kurz, N., Louchart, C., Merchán, E., Michelagnoli, C., Pérez-Vidal, R. M., Pietri, S., Ralet, D., Reese, M., Schaffner, H., Stahl, Ch, Weick, H., Ameil, F., De Angelis, G., Arici, T., Carroll, R., Dombrádi, Zs, Gadea, A., Golubev, P., Lettmann, M., Lizarazo, C., Mahboub, D., Pai, H., Patel, Z., Pietralla, N., Regan, P. H., Sarmiento, L. G., Wieland, O., Wilson, E., Birkenbach, B., Bruyneel, B., Burrows, I., Charles, L., Clément, E., Crespi, F. C L, Cullen, D. M., Désesquelles, P., Eberth, J., González, V., Habermann, T., Harkness-Brennan, L., Hess, H., Judson, D. S., Jungclaus, A., Korten, W., Labiche, M., Maj, A., Mengoni, D., Napoli, D. R., Pullia, A., Quintana, B., Rainovski, G., Reiter, P., Salsac, M. D., Sanchis, E., and Valiente Dóbon, J. J.

Abstract

The Fe54 nucleus was populated from a 56Fe beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10+ metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the 56Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of 54Fe, suggesting that it was populated via the decay of the Δ0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10+ metastable state in 54Fe is a consequence of the quark structure of the nucleons.

Published
2016

Catalog

Books, media, physical & digital resources
See catalog results