Cross section and reaction rate of 92Mo(p, γ)93Tc determined from thick target yield measurements

被引：18

作者：

Gyuerky, Gy ^{[1
]}

Vakulenko, M. ^{[1
]}

Fueloep, Zs. ^{[1
]}

Halasz, Z. ^{[1
]}

Kiss, G. G. ^{[1
]}

Somorjai, E. ^{[1
]}

Szuecs, T. ^{[1
]}

机构：

[1] Inst Nucl Res MTA Atomki, H-4001 Debrecen, Hungary

来源：

NUCLEAR PHYSICS A | 2014年 / 922卷

基金：

欧洲研究理事会;

关键词：

Astrophysical gamma-process; Reaction cross section; Thick target yield; Gamma-spectroscopy; NUCLEAR-LEVEL DENSITY; DATA SHEETS; P-PROCESS; ASTROPHYSICS; PHYSICS; MODELS;

D O I：

10.1016/j.nuclphysa.2013.12.003

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：

For the better understanding of the astrophysical gamma-process the experimental determination of low energy proton- and alpha-capture cross sections on heavy isotopes is required. The existing data for the Mo-92(p, gamma)Tc-93 reaction are contradictory and strong fluctuation of the cross section is observed which cannot be explained by the statistical model. In this paper a new determination of the Mo-92(p, gamma)Tc-93 and Mo-98(p, gamma)Tc-99m cross sections based on thick target yield measurements are presented and the results are compared with existing data and model calculations. Reaction rates of Mo-92(p, gamma)Tc-93 at temperatures relevant for the gamma-process are derived directly from the measured thick target yields. The obtained rates are a factor of 2 lower than the ones used in astrophysical network calculations. It is argued that in the case of fluctuating cross sections the thick target yield measurement can be more suited for a reliable reaction rate determination. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：112 / 125

页数：14

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