Improved S factor of the 12C(p, γ) 13N reaction at E=320-620 keV and the 422 keV resonance

被引：6

作者：

Skowronski, J. ^{[1
,2
]}

Masha, E. ^{[3
]}

Piatti, D. ^{[1
,2
]}

Aliotta, M. ^{[4
]}

Babu, H. ^{[1
]}

Bemmerer, D. ^{[3
]}

Boeltzig, A. ^{[3
]}

Depalo, R. ^{[4
,5
,6
]}

Caciolli, A. ^{[1
,2
]}

Cavanna, F. ^{[7
]}

Csedreki, L. ^{[8
]}

Fulop, Z. ^{[8
]}

Imbriani, G. ^{[9
,10
]}

Rapagnani, D. ^{[9
,10
]}

Ruemmler, S. ^{[3
,11
]}

Schmidt, K. ^{[3
]}

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

Szucs, T. ^{[8
]}

Turkat, S. ^{[11
]}

Yadav, A. ^{[3
,11
]}

机构：

[1] Univ Padua, I-35131 Padua, Italy

[2] INFN, Sez Padova, I-35131 Padua, Italy

[3] Helmholtz Zentrum Dresden Rossendorf, D-01328 Dresden, Germany

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

[5] Univ Milan, I-20133 Milan, Italy

[6] INFN, Sez Milano, I-20133 Milan, Italy

[7] INFN, Sez Torino, I-10125 Turin, Italy

[8] Inst Nucl Res ATOMKI, POB 51, H-4001 Debrecen, Hungary

[9] Univ Napoli Federico II, I-80126 Naples, Italy

[10] INFN, Sez Napoli, I-80126 Naples, Italy

[11] Tech Univ Dresden, Zellescher Weg 19, D-01069 Dresden, Germany

来源：

PHYSICAL REVIEW C | 2023年 / 107卷 / 06期

基金：

欧洲研究理事会;

关键词：

CROSS-SECTION MEASUREMENTS; DIRECT CAPTURE; ENERGY; COMPILATION; SCATTERING; NUCLEI;

D O I：

10.1103/PhysRevC.107.L062801

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 12C(p, & gamma; ) 13N reaction is the onset process of both the CNO and hot CNO cycles that drive massive star, red and asymptotic giant branch star, and novae nucleosynthesis. The 12C(p, & gamma; )13N rate affects the final abundances of the stable 12,13C nuclides with ramifications for meteoritic carbon isotopic abundances and the s-process neutron source strength. Here, an underground measurement of the 12C(p, & gamma; ) 13N cross section is reported. The present data, obtained at the Felsenkeller shallow-underground laboratory in Dresden (Germany), encompass the 320-620 keV center of mass energy range to include the wide and poorly constrained E = 422 keV resonance that dominates the rate at high temperatures. This work's S-factor results, lower than literature by 25%, are included in a comprehensive R-matrix fit, and the energy of the 1 + first excited state of 13N is found to be 2369.6(4) keV with a radiative and proton width of 0.49(3) eV and 34.9(2) keV, respectively. A reaction rate, based on the present R-matrix fit and extrapolation, is suggested.

引用

页数：6

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