THE MISSING 3+ STATE OF NE-18 AND EXPLOSIVE F-17(P,GAMMA) BURNING

被引：46

作者：

GARCIA, A ^{[1
]}

ADELBERGER, EG ^{[1
]}

MAGNUS, PV ^{[1
]}

MARKOFF, DM ^{[1
]}

SWARTZ, KB ^{[1
]}

SMITH, MS ^{[1
]}

HAHN, KI ^{[1
]}

BATEMAN, N ^{[1
]}

PARKER, PD ^{[1
]}

机构：

[1] YALE UNIV, WRIGHT NUCL STRUCT LAB, NEW HAVEN, CT 06511 USA

来源：

PHYSICAL REVIEW C | 1991年 / 43卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.43.2012

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：

Wiescher, Gorres, and Thielemann suggested that a "missing" J-pi = 3+ level in Ne-18 should occur at E(x) almost-equal-to 4.33 MeV, only almost-equal-to 410 keV above the F-17+p threshold. They noted that this level would provide an s-wave resonance in the F-17(p, gamma) reaction, greatly increasing its thermonuclear reaction rate. This, in turn, would have a pronounced effect on the production of O-17 and O-18 in explosive stellar environments. We have searched for this level using the O-16(He-3,n) reaction. High-resolution time-of-flight spectra show that the 3+ level occurs at E(x) = 4.561 +/- 0.009 MeV, almost-equal-to 230 keV higher than suggested. The astrophysical consequences of this result are discussed.

引用

页码：2012 / 2019

页数：8

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