A HIGH-RESOLUTION STUDY OF THE NE-20(HE-3, T)NA-20 REACTION AND THE NE-19(P,GAMMA)NA-20 REACTION-RATE

被引：47
|
作者：
SMITH, MS
MAGNUS, PV
HAHN, KI
HOWARD, AJ
PARKER, PD
CHAMPAGNE, AE
MAO, ZQ
机构：
[1] YALE UNIV,AW WRIGHT NUCL STRUCT LAB,NEW HAVEN,CT 06511
[2] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544
来源：
NUCLEAR PHYSICS A | 1992年 / 536卷 / 02期
基金：
美国国家科学基金会;
关键词：
NE-20(HE-3; T); E; 29.7; MEV; MEASURED SIGMA(EB); CALCULATED TEMPERATURE DEPENDENCE OF STELLAR NE-19(P; GAMMA)NA-20 REACTION RATE; NA-20 DEDUCED LEVELS; GAMMA; IMPLANTED TARGETS; MAGNETIC SPECTROGRAPH;
D O I：
10.1016/0375-9474(92)90386-X
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：
A high-precision measurement of the Ne-20(He-3, t)Na-20 reaction has been made using implanted Ne-20 transmission targets to obtain pertinent information on the low-energy resonances in the Ne-19(p, gamma)Na-20 reaction. Resonance energies (447 +/- 5, 658 +/- 5, 787 +/- 5, and 857 +/- 5 keV) and upper limits on total intrinsic widths (< 10, < 6, < 10, and < 16 keV) have been measured for four excited states above the 2.199 MeV proton threshold in Na-20. The stellar Ne-19(p, gamma)Na-20 reaction rate is calculated for temperatures between 1 x 10(8) and 1 x 10(9) K. When combined with a recent study of the O-15(alpha, gamma)Ne-19 reaction, a new estimate is made of the conditions required for breakout from the Hot CNO cycle to the rapid proton capture process.
引用
收藏
页码：333 / 348
页数：16
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