Level structure of 26Si and its implications for the astrophysical reaction rate of 25Al(p,γ)26Si

被引：43
作者：
Seweryniak, D.
Woods, P. J.
Carpenter, M. P.
Davinson, T.
Janssens, R. V. F.
Jenkins, D. G.
Lauritsen, T.
Lister, C. J.
Shergur, J.
Sinha, S.
Woehr, A.
机构：
[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland
[3] Univ York, York YO10 5DD, N Yorkshire, England
[4] Univ Maryland, College Pk, MD 20742 USA
[5] Univ Notre Dame, Notre Dame, IN 46556 USA
来源：
PHYSICAL REVIEW C | 2007年 / 75卷 / 06期
关键词：
D O I：
10.1103/PhysRevC.75.062801
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：
A study of the level structure of Si-26 using in-beam gamma-ray spectroscopy is presented. A full level scheme is derived incorporating all states lying below the proton threshold energy. The results are in good agreement with shell model predictions and one-to-one correspondence is found with states in the mirror nucleus Mg-26. Additionally, a gamma-decay branch is observed from a state at 5677.0(17) keV, which is assigned to a 1(+) resonance important in the astrophysical reaction Al-25(p,gamma)Si-26. The newly derived resonance energy, E-r=159.2(35) keV, has the effect of decreasing the reaction rate at the novae ignition temperature of approximate to 0.1 GK by a factor of approximate to 2 when compared with the previous most precise measurement of this state.
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