Development of an “α-TOF” detector for correlated measurement of atomic masses and decay properties

T. Niwase, M. Wada, P. Schury, H. Haba, S. Ishizawa, Y. Ito, D. Kaji, S. Kimura, H. Miyatake, K. Morimoto, K. Morita, M. Rosenbusch, H. Wollnik, T. Shanley, Y. Benari

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

We have developed a novel detector, referred to as an “α-TOF detector”, for correlated measurements of atomic masses and decay properties of low-yield, short-lived radioactive isotopes using a multi-reflection time-of-flight mass spectrograph. By correlating measured time-of-flight signals with decay events, it will be possible to suppress background events and obtain accurate, high-precision mass and half-life values even in cases of very low event rates. An offline test of the α-TOF detector has shown that the time-of-flight detection efficiency for 5.48 MeV α-rays is more than 90% and yields a time resolution of 250.6(68) ps and an alpha-energy resolution of 141.1(9) keV. Using a two-dimensional spectrum of the correlated α-ray energy and time-of-flight, the α-rays from mixed α sources could be resolved. Subsequent testing using α-emitting nuclei extracted offline from a gas cell provide verification of the α-ray based characterization.

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 器械工学

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