Mass and QEC value of 26Si

被引：44
作者：
Eronen, T. [1 ]
Elomaa, V.-V. [1 ]
Hager, U. [1 ]
Hakala, J. [1 ]
Jokinen, A. [1 ]
Kankainen, A. [1 ]
Kessler, T. [1 ]
Moore, I. D. [1 ]
Rahaman, S. [1 ]
Rissanen, J. [1 ]
Weber, C. [1 ]
Aysto, J. [1 ]
机构：
[1] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland
来源：
PHYSICAL REVIEW C | 2009年 / 79卷 / 03期
关键词：
THERMONUCLEAR REACTION-RATES; PENNING TRAP; CHARGED-PARTICLE; EXCITATION; NUCLEI; IGISOL; AL-26;
D O I：
10.1103/PhysRevC.79.032802
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：
The Q(EC) value of the superallowed beta emitter Si-26 has been measured with the JYFLTRAP Penning trap facility to be 4840.85(10) keV which is ten times more precise than any previous measurement. This leaves only the branching ratio to be improved before the Ft value of Si-26 can be used to test the conserved vector current hypothesis. As a consequence, the Al-25(p,gamma)Si-26 reaction Q-value (Q(p gamma)) was improved to be 5513.7(5) keV, limited now by the mass excess of Al-25. The new Q(p gamma) value changes the stellar production rate of Si-26 in nova ignition temperatures by about 10%.
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