論文

査読有り
2018年4月10日

First Direct Mass Measurements of Nuclides around Z=100 with a Multireflection Time-of-Flight Mass Spectrograph

Physical Review Letters
  • Y. Ito
  • ,
  • P. Schury
  • ,
  • M. Wada
  • ,
  • F. Arai
  • ,
  • H. Haba
  • ,
  • Y. Hirayama
  • ,
  • S. Ishizawa
  • ,
  • D. Kaji
  • ,
  • S. Kimura
  • ,
  • H. Koura
  • ,
  • M. Maccormick
  • ,
  • H. Miyatake
  • ,
  • J. Y. Moon
  • ,
  • K. Morimoto
  • ,
  • K. Morita
  • ,
  • M. Mukai
  • ,
  • I. Murray
  • ,
  • T. Niwase
  • ,
  • K. Okada
  • ,
  • A. Ozawa
  • ,
  • M. Rosenbusch
  • ,
  • A. Takamine
  • ,
  • T. Tanaka
  • ,
  • Y. X. Watanabe
  • ,
  • H. Wollnik
  • ,
  • S. Yamaki

120
15
開始ページ
152501-1
終了ページ
6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevLett.120.152501
出版者・発行元
American Physical Society

The masses of Es246, Fm251, and the transfermium nuclei Md249-252 and No254, produced by hot- and cold-fusion reactions, in the vicinity of the deformed N=152 neutron shell closure, have been directly measured using a multireflection time-of-flight mass spectrograph. The masses of Es246 and Md249,250,252 were measured for the first time. Using the masses of Md249,250 as anchor points for α decay chains, the masses of heavier nuclei, up to Bh261 and Mt266, were determined. These new masses were compared with theoretical global mass models and demonstrated to be in good agreement with macroscopic-microscopic models in this region. The empirical shell gap parameter δ2n derived from three isotopic masses was updated with the new masses and corroborates the existence of the deformed N=152 neutron shell closure for Md and Lr.

リンク情報
DOI
https://doi.org/10.1103/PhysRevLett.120.152501
URL
https://www.kek.jp/ja/newsroom/2018/03/29/1000/
ID情報
  • DOI : 10.1103/PhysRevLett.120.152501
  • ISSN : 1079-7114
  • ISSN : 0031-9007
  • SCOPUS ID : 85045350542

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