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

被引：11
作者：
Niwase, T. [1 ,2 ,3 ]
Wada, M. [3 ]
Schury, P. [3 ]
Haba, H. [2 ]
Ishizawa, S. [2 ,3 ,5 ]
Ito, Y. [4 ]
Kaji, D. [2 ]
Kimura, S. [2 ]
Miyatake, H. [3 ]
Morimoto, K. [2 ]
Morita, K. [1 ,2 ]
Rosenbusch, M. [2 ]
Wollnik, H. [6 ]
Shanley, T. [7 ]
Benari, Y. [7 ]
机构：
[1] Kyushu Univ, Dept Phys, Fukuoka, Fukuoka, Japan
[2] RIKEN, Nishina Ctr Accelerator Based Sci, Wako, Saitama, Japan
[3] High Energy Accelerator Res Org KEK, Inst Particle & Nucl Studies, Wako Nucl Sci Ctr, Wako, Saitama, Japan
[4] Japan Atom Energy Agcy, Tokai, Ibaraki, Japan
[5] Yamagata Univ, Grad Sch Sci & Engn, Yamagata, Japan
[6] New Mexico State Univ, Dept Chem & Biochem, Las Cruces, NM 88003 USA
[7] ETP Ion Detect, 8 Martha St, Clyde, NSW, Australia
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2020年 / 953卷
基金：
日本学术振兴会;
关键词：
MRTOF-MS; Mass spectrometry; Time-of-flight detector; Superheavy elements; alpha decay; ISOTOPES; SEPARATION; TRAP;
D O I：
10.1016/j.nima.2019.163198
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
We have developed a novel detector, referred to as an "alpha-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 alpha-TOF detector has shown that the time-of-flight detection efficiency for 5.48 MeV alpha-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 alpha-ray energy and time-of-flight, the alpha-rays from mixed alpha sources could be resolved. Subsequent testing using alpha-emitting nuclei extracted offline from a gas cell provide verification of the alpha-ray based characterization.
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页数：8
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