First Experimental Measurement of the 18O(p, α)15N Reaction at Astrophysical Energies

被引：0

作者：

La Cognata, M. ^{[1
]}

Sergi, M. L. ^{[1
]}

Spitaleri, C. ^{[1
]}

Mukhamedzhanov, A. ^{[2
]}

Coc, A. ^{[3
]}

Cherubini, S. ^{[1
]}

Goldberg, V. ^{[2
]}

Gulino, M. ^{[1
]}

Hammache, F. ^{[3
]}

Irgaziev, B. ^{[4
]}

Kiss, G. ^{[1
]}

Lamia, L. ^{[1
]}

Pizzone, R. G. ^{[1
]}

Romano, S. ^{[1
]}

de Sereville, N.

Tribble, R. ^{[2
]}

Tumino, A. ^{[5
,6
]}

机构：

[1] Univ Catania, INFN LNS, Catania, Italy

[2] Texas A&M Univ, Inst Cyclotron, College Stn, TX USA

[3] CSNSM, CNRS IN2P3, Orsay, France

[4] GIK, Inst Engn Sci & Technol, Topi, Pakistan

[5] Kore Univ, Enna, Italy

[6] INFN, LNS, Catania, Italy

来源：

EXOTIC NUCLEI AND NUCLEAR - PARTICLE ASTROPHYSICS III: FROM NUCLEI TO STARS | 2010年 / 1304卷

关键词：

Indirect methods; resonant reactions; ASYMPTOTIC GIANT BRANCH; STARS; CARBON;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The O-18(p, alpha)N-15 and O-17(p, alpha)N-14 reactions are of primary importance in several astrophysical scenarios, including nucleosynthesis inside Asymptotic Giant Branch stars and oxygen and nitrogen isotopic ratios in meteorite grains. They are also key reactions to understand exotic systems such as R-Coronae Borealis stars and novae. Thus, the measurement of their cross sections in the low energy region can be crucial to reduce the nuclear uncertainty on theoretical predictions, because the resonance parameters are poorly determined. The Trojan Horse Method, in its newly developed form particularly suited to investigate low-energy resonances, has been applied to the H-2(O-18, alpha N-15)n and H-2(O-17, alpha N-14)n reactions to deduce the O-18(p, alpha)N-15 and O-17(p, alpha)N-14 cross sections at low energies. Resonances in the O-18(p, alpha)N-15 and O-17(p, alpha)N-14 excitation functions have been studied and the resonance parameters deduced.

引用

页码：379 / +

页数：2

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