Strength of the 18F(p,α)15O resonance at Ec.m.=330 keV -: art. no. 262501

被引：77
|
作者：
Bardayan, DW [1 ]
Batchelder, JC
Blackmon, JC
Champagne, AE
Davinson, T
Fitzgerald, R
Hix, WR
Iliadis, C
Kozub, RL
Ma, Z
Parete-Koon, S
Parker, PD
Shu, N
Smith, MS
Woods, PJ
机构：
[1] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA
[2] Oak Ridge Associated Univ, INIRIB, Oak Ridge, TN 37831 USA
[3] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA
[4] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland
[5] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[6] Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA
[7] Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA
[8] Yale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06520 USA
[9] Chinese Inst Atom Energy, Beijing 102413, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 26期
关键词：
D O I：
10.1103/PhysRevLett.89.262501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Production of the radioisotope F-18 in novae is severely constrained by the rate of the F-18(p,alpha)O-15 reaction. A resonance at E-c.m.=330 keV may strongly enhance the F-18(p,alpha)O-15 reaction rate, but its strength has been very uncertain. We have determined the strength of this important resonance by measuring the F-18(p,alpha)O-15 cross section on and off resonance using a radioactive F-18 beam at the ORNL Holifield Radioactive Ion Beam Facility. We find that its resonance strength is 1.48+/-0.46 eV, and that it dominates the F-18(p,alpha)O-15 reaction rate over a significant range of temperatures characteristic of ONeMg novae.
引用
收藏
页码：1 / 262501
页数：4
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