-decay-correlated mass measurement of using an -TOF detector equipped multireflection time-of-flight mass spectrograph system

T. Niwase, M. Wada, P. Schury, P. Brionnet, S. D. Chen, T. Hashimoto, H. Haba, Y. Hirayama, D. S. Hou, S. Iimura, H. Ishiyama, S. Ishizawa, Y. Ito, D. Kaji, S. Kimura, J. Liu, H. Miyatake, J. Y. Moon, K. Morimoto, K. MoritaD. Nagae, M. Rosenbusch, A. Takamine, T. Tanaka, Y. X. Watanabe, H. Wollnik, W. Xian, S. X. Yan

Research output: Contribution to journalArticlepeer-review

Abstract

The atomic masses of the isotopes have been measured via decay-correlated mass spectroscopy using a multireflection time-of-flight mass spectrograph equipped with an -TOF detector. The Ra isotopes were produced as fusion-evaporation products in the reaction system and delivered by the gas-filled recoil ion separator GARIS-II at RIKEN. The -TOF detector provides for high-accuracy mass measurements by correlating time-of-flight signals with subsequent -decay events. The masses of and were directly measured using a multireflection time-of-flight mass spectrograph equipped with an -TOF detector. The mass excesses of and the excitation energy of were determined to be , and keV, respectively. The -decay branching ratio of , was directly determined from decay-correlated time-of-flight signals, and the reduced width of was calculated to be keV from the branching ratio. The spin-parity of was confirmed to be from decay correlated mass measurement results.

Original languageEnglish
Article number044617
JournalPhysical Review C
Volume104
Issue number4
DOIs
Publication statusPublished - Oct 2021

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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