Comprehensive mass measurement study of ${}^{252}$Cf fission fragments with MRTOF-MS and masses of neutron-rich Ce isotopes

Author:

Sota Kimura, Michiharu Wada, Hiromitsu Haba, Satoshi Ishizawa, Yuta Ito, Toshitaka Niwase, Marco Rosenbusch, Peter Schury, Aiko Takamine

Keyword:

Nuclear Experiment, Nuclear Experiment (nucl-ex)

journal:

date:

2024-02-06 00:00:00

Abstract

We report the mass measurements of neutron-rich isotopes produced via spontaneous fission of ${}^{252}$Cf using a multi-reflection time-of-flight mass spectrograph. The mass of ${}^{155}$Ce is determined experimentally for the first time. A discrepancy between the experimental and literature values was found for the mass of ${}^{127}$Sb, which was previously deduced through indirect measurements. In comparison with several theoretical predictions, both the values and the trend of the mass excesses of ${}^{152-155}$Ce cannot be consistently explained. The wide-range and simultaneous mass measurements of the multi-reflection time-of-flight mass spectrograph enable us to reexamine existing mass data. The new measurements suggest corrections to the present values, including data from previous Penning trap mass measurements.

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