Experimental evidence of 2He decay from 18Ne excited states

被引：74
|
作者：
Raciti, G. [1 ]
Cardella, G.
De Napoli, M.
Rapisarda, E.
Amorini, F.
Sfienti, C.
机构：
[1] Univ Catania, Dipartimento Fis & Astron, I-95123 Catania, Italy
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.100.192503
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Two-proton decay from Ne-18 excited states has been studied by complete kinematical reconstruction of the decay products. The Ne-18 nucleus has been produced as a radioactive beam by Ne-20 primary projectile fragmentation at 45 AMeV incident energy on a Be target. The Ne-18 at 33 AMeV incident energy has been excited via Coulomb excitation on a Pb-nat target. The obtained results unambiguously show that the 6.15 MeV Ne-18 state two-proton decay proceeds through a He-2 diproton resonance (31%) and democratic or virtual sequential decay (69%). The quoted branching ratio has been deduced from relative angle and momentum correlations of the emitted proton pairs.
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页数：4
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