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2 results on '"H, Kanaoka"'

1. β-γ and isomeric decay spectroscopy of 168Dy

Author

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

Subjects
Physics, 010308 nuclear & particles physics, Fission, QC1-999, 01 natural sciences, Nuclear physics, Excited state, 0103 physical sciences, Level structure, Experimental work, 010306 general physics, Spectroscopy, Beam (structure)
Abstract

This contribution will report on the experimental work on the level structure of 168Dy. The experimental data have been taken as part of the EURICA decay spectroscopy campaign at RIBF, RIKEN in November 2014. In the experiment, a 238U primary beam is accelerated up to 345 MeV/u with an average intensity of 12 pnA. The nuclei of interest are produced by in-flight fission of 238U impinging on Be target with a thickness of 5 mm. The excited states of 168Dy have been populated through the decay from a newly identified isomeric state and via the β decay from 168Tb. In this contribution, scientific motivations, experimental procedure and some preliminary results for this study are presented.

Published
2018

2. Isomer-delayed gamma-ray spectroscopy of neutron-rich 166Tb

Author

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

Subjects
Physics, 010308 nuclear & particles physics, Fission, QC1-999, Nuclear Theory, 01 natural sciences, Nuclear physics, Dipole, Internal conversion, Metastability, 0103 physical sciences, Neutron, Gamma spectroscopy, 010306 general physics, Nucleon, Ground state, Nuclear Experiment
Abstract

© The Authors, published by EDP Sciences, 2017. This short paper presents the identification of a metastable, isomeric-state decay in the neutron-rich odd-odd, prolate-deformed nucleus 166Tb. The nucleus of interest was formed using the in-flight fission of a 345 MeV per nucleon 238U primary beam at the RIBF facility, RIKEN, Japan. Gamma-ray transitions decaying from the observed isomeric states in 166Tb were identified using the EURICA gamma-ray spectrometer, positioned at the final focus of the BigRIPS fragments separator. The current work identifies a single discrete gamma-ray transition of energy 119 keV which de-excites an isomeric state in 166Tb with a measured half-life of 3.5(4) μs. The multipolarity assignment for this transition is an electric dipole and is made on the basis internal conversion and decay lifetime arguments. Possible two quasi-particle Nilsson configurations for the initial and final states which are linked by this transition in 166Tb are made on the basis of comparison with Blocked BCS Nilsson calculations, with the predicted ground state configuration for this nucleus arising from the coupling of the v(1-/2)[521] and π(3+/2) Nilsson orbitals. ispartof: EPJ Web of Conferences vol:146 ispartof: ND 2016: International Conference on Nuclear Data for Science and Technology location:Bruges, Belgium date:11 Sep - 16 Sep 2016 status: Published online

Published
2017

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