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

页码：333 / 348

页数：16