In-gas-cell laser ionization spectroscopy of Os194,196 isotopes by using a multireflection time-of-flight mass spectrograph

H. Choi, Y. Hirayama, S. Choi, T. Hashimoto, S. C. Jeong, H. Miyatake, J. Y. Moon, M. Mukai, T. Niwase, M. Oyaizu, M. Rosenbusch, P. Schury, A. Taniguchi, Y. X. Watanabe, and M. Wada
Phys. Rev. C 102, 034309 – Published 8 September 2020

Abstract

We performed in-gas-cell laser ionization spectroscopy of Os194,196, which were produced by multinucleon transfer reactions at the KEK Isotope Separation System (KISS). The nuclei of interest were identified through β-decay spectroscopy and a newly applied multireflection time-of-flight mass spectrograph (MRTOF-MS). From the study of laser resonance spectra, isotope shifts (ISs) of the transition λ1=247.758 nm for Os194 and Os196 were measured for the first time. The change in the mean-square charge radius δr2192,A and the quadrupole deformation parameter β221/2 were deduced from the IS measurements. The results were compared with the theoretical calculations and the predicted shape transition at Os194 is discussed.

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  • Received 1 June 2020
  • Accepted 17 August 2020

DOI:https://doi.org/10.1103/PhysRevC.102.034309

©2020 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

H. Choi1,2,*, Y. Hirayama3,†, S. Choi1,2, T. Hashimoto4, S. C. Jeong3,4, H. Miyatake3, J. Y. Moon4, M. Mukai5,6, T. Niwase3,6,7, M. Oyaizu3, M. Rosenbusch3, P. Schury3, A. Taniguchi8, Y. X. Watanabe3, and M. Wada3

  • 1Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
  • 2Institute for Nuclear Particle Astrophysics, Seoul National University, Seoul 08826, Republic of Korea
  • 3Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
  • 4Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
  • 5Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
  • 6Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
  • 7Department of Physics, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
  • 8Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan

  • *hyunsuki92@snu.ac.kr
  • yoshikazu.hirayama@kek.jp

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Issue

Vol. 102, Iss. 3 — September 2020

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