New measurement of the Ec.m.=323 keV resonance in the 19F(p, γ) 20Ne reaction

被引：5

作者：

Williams, M. ^{[1
,2
]}

Adsley, P. ^{[3
,4
]}

Davids, B. ^{[2
,5
]}

Greife, U. ^{[6
]}

Hutcheon, D. ^{[2
]}

Karpesky, J. ^{[6
]}

Lennarz, A. ^{[2
]}

Lovely, M. ^{[6
]}

Ruiz, C. ^{[2
]}

机构：

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

[2] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada

[3] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[4] iThemba Lab Accelerator Based Sci, ZA-7129 Somerset West, South Africa

[5] Simon Fraser Univ, Dept Phys, 8888 Univ Dr, Burnaby, BC V5A 1S6, Canada

[6] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA

来源：

PHYSICAL REVIEW C | 2021年 / 103卷 / 05期

基金：

英国科学技术设施理事会; 加拿大自然科学与工程研究理事会;

关键词：

DESIGN;

D O I：

10.1103/PhysRevC.103.055805

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：

At temperatures below 0.1 GK, the F-19(p, gamma) Ne-20 reaction is the only breakout path out of the CNO cycle. Experimental studies of this reaction are challenging from a technical perspective due to copious gamma-ray background from the far stronger F-19(p, alpha) O-16 reaction channel. Here, we present the first inverse kinematics study of the F-19(p, gamma) Ne-20 reaction, in which we measure the strength of the 323-keV resonance. We find a strength value of omega gamma = 3.3(-0.9)(+1.1) meV, which is a factor of two larger than the most recent previous study. The discrepancy is likely the result of a direct to ground state transition which previous studies were not sensitive to. We also observe the transition to the first 2(-) state, which has not been observed for this resonance in previous studies. A new thermonuclear reaction rate is calculated and compared with the literature.

引用

页数：8

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