CROSS-SECTIONS AND REACTION-RATES OF D+LI-8 REACTIONS INVOLVED IN BIG-BANG NUCLEOSYNTHESIS

被引:12
作者
BALBES, MJ
FARRELL, MM
BOYD, RN
GU, X
HENCHECK, M
KALEN, JD
MITCHELL, CA
KOLATA, JJ
LAMKIN, K
SMITH, R
TIGHE, R
ASHKTORAB, K
BECCHETTI, FD
BROWN, J
ROBERTS, D
WANG, TF
HUMPHREY, D
VOURVOPOULOS, G
ISLAM, MS
机构
[1] OHIO STATE UNIV,DEPT ASTRON,COLUMBUS,OH 43210
[2] UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556
[3] HOSP UNIV PENN,DEPT RADIOL,DIV NUCL MED,PHILADELPHIA,PA 19104
[4] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720
[5] UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109
[6] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550
[7] WESTERN KENTUCKY UNIV,DEPT PHYS,BOWLING GREEN,KY 42101
[8] BALL STATE UNIV,DEPT PHYS,MUNCIE,IN 47306
基金
美国国家科学基金会;
关键词
H-2(LI-8; LI-7); (LI-8; BE-9); LI-9); E(LAB)=8-14 MEV; MEASURED SIGMA(E; THETA); DEDUCED REACTION RATES;
D O I
10.1016/0375-9474(94)00484-5
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
We have measured angular distributions of the H-2(Li-8, Li-7)H-3 and H-2(Li-8, Be-9)n reations at E(c.m.) = 1.5 to 2.8 MeV using an Li-8-radioactive-beam technique. Astrophysical S-factors and reaction rates were calculated from the measured cross sections. Although the H-2(8Li, Be-9)n cross section is small, it can contribute to Be-9 synthesis, The H-2(Li-8, Li-7)H-3 reaction has a sufficiently large cross section to destroy Li-8, which may decrease the synthesis of heavier elements. No products from the H-2(Li-8, Li-9)p reaction were detected. We also present the results of calculations using the inhomogeneous model of primordial nucleosynthesis in several regions of parameter space.
引用
收藏
页码:315 / 334
页数:20
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