First evidence for the two-proton decay of 45Fe

被引：278
|
作者：
Pfützner, M
Badura, E
Bingham, C
Blank, B
Chartier, M
Geissel, H
Giovinazzo, J
Grigorenko, LV
Grzywacz, R
Hellström, M
Janas, Z
Kurcewicz, J
Lalleman, AS
Mazzocchi, C
Mukha, I
Münzenberg, G
Plettner, C
Roeckl, E
Rykaczewski, KP
Schmidt, K
Simon, RS
Stanoiu, M
Thomas, JC
机构：
[1] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland
[2] GSI Darmstadt, D-64291 Darmstadt, Germany
[3] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[4] CEN Bordeaux Gradignan, F-33175 Gradignan, France
[5] Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 3BX, Merseyside, England
[6] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA
[7] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland
[8] GANIL, F-14021 Caen, France
来源：
EUROPEAN PHYSICAL JOURNAL A | 2002年 / 14卷 / 03期
关键词：
D O I：
10.1140/epja/i2002-10033-9
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Decays of five Fe-45 atoms have been observed at the fragment separator of GSI. Whereas one event is consistent with the beta-decay of Fe-45 accompanied by the emission of a 10 MeV proton, four decays are consistent with the emission of particle(s) of total energy 1.1 +/- 0.1 MeV. This observation represents the first evidence for two-proton ground-state radioactivity, a decay mode predicted for Fe-45. The time distribution of the observed decay events corresponds to a half-life of 3.2(-1.0)(+2.6) ms.
引用
收藏
页码：279 / 285
页数：7
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