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3 results on '"C. J. Griffin"'

1. Isomer Spectroscopy in Odd--Even Ti Isotopes: Approaching $N=40$

Author

T. Davinson, S. M. Lenzi, D. Kahl, P. Schrock, A. Estrade, L. J. Harkness-Brennan, Satoru Momiyama, D. R. Napoli, S. Choi, Toshiyuki Sumikama, Shin-Ichiro Nishimura, K. Matsui, M. Alaqueel, S. Riccetto, O. Aktas, Hiroyoshi Sakurai, C. R. Nita, H. Baba, T. Isobe, V. Werner, W. Witt, P. R. John, Kathrin Wimmer, P. Doornenbal, Frédéric Nowacki, S. Bae, Toshiaki Ando, P. A. Söderström, V. H. Phong, Alfredo Poves, G. G. Kiss, Y. Saito, F. Recchia, C. J. Griffin, C. Stahl, M. Labiche, J. Ha, Megumi Niikura, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), UAM. Departamento de Física Teórica, and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Titanium, Physics, Isotope, 010308 nuclear & particles physics, Nuclear Theory, Shell (structure), Física, General Physics and Astronomy, Plant shutdowns, Physics and Astronomy(all), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Physics and Astronomy (all), Isotopes, Chemical physics, 0103 physical sciences, Physics::Atomic and Molecular Clusters, γ-ray spectroscopy, Shells (structures), Calcium, Nuclear Experiment, Spectroscopy
Abstract

Our understanding of the evolution of the shell structure in nuclei far from stability is based on the study of some key nuclei. Nuclei at or next to double shell closures play a special role in this. Presently, a lot of discussion is concentrated on the neutron-rich calcium isotopes, which provide a rich testing ground for various nuclear models with several traditional and new magic numbers. 60 Ca is now almost within reach with the most advanced radioactive beam facilities. In order to investigate the evolution of the shell gap at N = 40, the configuration of states in the odd–even titanium isotopes up to N = 37 ( 59 Ti) have been studied. In order to experimentally access the shell gap at N = 40, it is nowadays within the reach of the most advanced facility the investigation of neutron hole configuration states in odd–even titanium isotopes up to N = 37, in the 59 Ti nucleus. Such states correspond to relatively simple configurations that constitute a challenging testing ground for effective nuclear interactions. The new data obtained in our experiment allows to place the present predictions concerning the shell closure at N = 40 in the calcium region on a more solid ground.

Published
2019

2. The BRIKEN Project: Extensive Measurements of $\beta $-delayed Neutron Emitters for the Astrophysical r Process

Author

H. Baba, P. J. Woods, Shigeru Kubono, J. Agramunt, Iris Dillmann, L. J. Harkness-Brennan, B. Rubio, A.I. Morales, R. Caballero Folch, B. Moon, D. W. Stracener, S.L. Thomas, Toshiyuki Sumikama, Rebecca Surman, Shunji Nishimura, A. Riego, G. Lorusso, M. Labiche, A. Estrade, M. Karny, T. Davinson, N. Nepal, Y. Saito, C. Domingo-Pardo, A. Korgul, K. Miernik, H. Takeda, J. L. Tain, F. Montes, Gabor Kiss, D. S. Ahn, P. J. Coleman-Smith, H. Suzuki, Maya Takechi, T. Isobe, O. Hall, Jenny Lee, F. Calviño, Zs. Podolyák, K. Matsui, Ariel Tarifeño-Saldivia, Hiroyoshi Sakurai, J. M. Allmond, D. Kahl, R. D. Page, M. Kogimtzis, A. Tolosa-Delgado, Alejandro Algora, I.H. Lazarus, P. A. Söderström, B.C. Rasco, J. Ha, N. Fukuda, S. Go, P. H. Regan, JJ Liu, V. F. E. Pucknell, Y. Shimizu, K. P. Rykaczewski, James Simpson, V. H. Phong, C. J. Griffin, Robert Grzywacz, G. Cortes, N.T. Brewer, S. Bae, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
Astrofísica, Delayed neutron, Neutron emission, Astrophysics::High Energy Astrophysical Phenomena, Nuclear data, Nuclear Theory, Measure (physics), General Physics and Astronomy, Neutron, Astrophysics, 01 natural sciences, Nuclear physics, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Physics, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Neutron capture, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], r-process
Abstract

An ambitious program to measure decay properties, primarily β-delayed neutron emission probabilities and half-lives, for a significant number of nuclei near or on the path of the rapid neutron capture process, has been launched at the RIKEN Nishina Center. We give here an overview of the status of the project.

Published
2018

3. Isomer Spectroscopy of Neutron-rich $^{165,167}$Tb

Author

H. Baba, W. N. Catford, Hirofumi Watanabe, S. Kanaya, Furong Xu, Toshiyuki Kubo, Giuseppe Lorusso, Zsolt Podolyak, T. Isobe, I. Nishizuka, Z. Korkulu, Shunji Nishimura, Shigeru Kubono, P-A Soderstrom, István Kuti, Alison Bruce, Satoru Terashima, I. Kojouharov, P. Lee, L. A. Gurgi, H. L. Liu, Hiroyoshi Sakurai, Toshiyuki Sumikama, T. Berry, N. Kurz, Oliver J. Roberts, Chang-Bum Moon, Naohito Inabe, E. J. Lee, Ayumi Yagi, Hiroyuki Takeda, P. H. Regan, Hiroshi Suzuki, C. J. Griffin, Zhengyu Xu, K. Y. Chae, Gavin Lotay, Thamer Alharbi, G. X. Zhang, Naoki Fukuda, Raymond J. Carroll, C. M. Shand, S. Lalkovski, Eiji Ideguchi, Gregory Lane, H. Kanaoka, P. Doornenbal, Jin Wu, F. G. Kondev, Zsolt Dombrádi, F. Browne, Atsuko Odahara, C.R. Nita, Zs. Vajta, C. S. Lee, H. Schaffner, J. J. Liu, J-J Valiente-Dobón, Zena Patel, V. H. Phong, Philip M Walker, and A. Estrade

Subjects
Physics, Proton, 010308 nuclear & particles physics, Fission, Nuclear Theory, General Physics and Astronomy, Fermi surface, 01 natural sciences, Nuclear physics, Excited state, 0103 physical sciences, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Spectroscopy, Ground state
Abstract

We present information on the excited states in the prolate-deformed, neutron-rich nuclei 165;167Tb100;102. The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon 238U primary beam on a 2 mm 9Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the s regime measured using the EURICA gamma-ray spectrometer. Metastable-state decays are identified in 165Tb and 167Tb and interpreted as arising from hindered E1 decay from the 7 2 [523] single quasi-proton Nilsson configuration to rotational states built on the 3 2 [411] single quasi-proton ground state. These data correspond to the first spectroscopic information in the heaviest, odd-A terbium isotopes reported to date and provide information on proton Nilsson configurations which reside close to the Fermi surface as the 170Dy doubly-midshell nucleus is approached.

Published
2017

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