Strength measurement of the Eαlab=830 keV resonance in the 22Ne(α, n) 25Mg reaction using a stilbene detector

被引：0

作者：

Shahina ^{[1
]}

Deboer, R. J. ^{[1
]}

Goerres, J. ^{[1
]}

Fang, R. ^{[1
]}

Febbraro, M. ^{[2
,3
]}

Kelmar, R. ^{[1
]}

Matney, M. ^{[1
]}

Manukyan, K. ^{[1
]}

Nattress, J. T. ^{[2
]}

Robles, E. ^{[1
]}

Ruland, T. J. ^{[2
]}

King, T. T. ^{[2
]}

Sanchez, A. ^{[1
]}

Sidhu, R. S. ^{[4
]}

Stech, E. ^{[1
]}

Wiescher, M. ^{[1
]}

机构：

[1] Univ Notre Dame, Dept Phys & Astron, Notre Dame, IN 46556 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

[3] Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA

[4] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3FD, Scotland

来源：

PHYSICAL REVIEW C | 2024年 / 110卷 / 01期

基金：

美国国家科学基金会; 英国科学技术设施理事会;

关键词：

S-PROCESS; REACTION-RATES; NE-22(ALPHA; N)MG-25;

D O I：

10.1103/PhysRevC.110.015801

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 interplay between the 22Ne(alpha, gamma ) 26Mg reaction and the competing 22Ne(alpha, n) 25Mg reaction determines the efficiency of the latter as a neutron source at the temperatures of stellar helium burning. In both cases, the rates are dominated by the alpha-cluster resonance at 830 keV. This resonance plays a particularly important role in determining the strength of the neutron flux for both the weak and main s process as well as the n process. Recent experimental studies based on transfer reactions suggest that the neutron and gamma -ray strengths for this resonance are approximately equal. In this study, the 22Ne(alpha, n) 25Mg resonance strength has been remeasured and found to be similar to the previous direct studies. This reinforces an 830 keV resonance strength that is approximately a factor of 3 larger for the 22Ne(alpha, n) 25Mg reaction than for the 22Ne(alpha, gamma ) 26Mg reaction.

引用

页数：10

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