Radiative Capture on Nuclear Isomers: Direct Measurement of the 26mAl(p,γ)27Si Reaction

被引：11

作者：

Lotay, G. ^{[1
]}

Lennarz, A. ^{[2
,3
]}

Ruiz, C. ^{[2
,4
]}

Akers, C. ^{[2
,5
,8
]}

Chen, A. A.

Christian, G. ^{[2
]}

Connolly, D. ^{[2
]}

Davids, B. ^{[2
,6
]}

Davinson, T. ^{[7
]}

Fallis, J. ^{[2
]}

Hutcheon, D. A. ^{[2
]}

Machule, P. ^{[2
]}

Martin, L. ^{[2
]}

Mountford, D. J. ^{[7
]}

Murphy, A. St J. ^{[7
]}

机构：

[1] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[2] TRIUMF, Vancouver, BC V6T 2A3, Canada

[3] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[4] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 2Y2, Canada

[5] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[6] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[7] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[8] Inst for Basic Sci Korea, Rare Isotope Sci Project, Daejeon 305811, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2022年 / 128卷 / 04期

关键词：

AL-26; ASTROPHYSICS; STATES;

D O I：

10.1103/PhysRevLett.128.042701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first direct measurement of an astrophysical reaction using a radioactive beam of isomeric nuclei. In particular, we have measured the strength of the key 447-keV resonance in the Al-26m(p, gamma)Si-27 reaction to be 432 thorn 146 -226 meV and find that this resonance dominates the thermally averaged reaction rate for temperatures between 0.3 and 2.5 GK. This work represents a critical development in resolving one of the longest standing issues in nuclear astrophysics research, relating to the measurement of proton capture reactions on excited quantum levels, and offers unique insight into the destruction of isomeric Al-26 in astrophysical plasmas.

引用

页数：6

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