Cross section measurements of proton capture reactions on Mo isotopes relevant to the astrophysical p process

被引:14
作者
Foteinou, V. [1 ,3 ]
Axiotis, M. [1 ]
Harissopulos, S. [1 ]
Dimitriou, P. [2 ]
Provatas, G. [1 ,5 ]
Lagoyannis, A. [1 ]
Becker, H. -W. [3 ]
Rogalla, D. [3 ]
Zilges, A. [4 ]
Schreckling, A. [4 ]
Endres, A. [4 ]
机构
[1] NCSR Demokritos, Tandem Accelerator Lab, Inst Nucl & Particle Phys, Athens 15310, Greece
[2] IAEA, Nucl Data Sect, A-1400 Vienna, Austria
[3] Ruhr Univ Bochum, DTL RUBION, Univ Str 150, D-40781 Bochum, Germany
[4] Univ Cologne, Inst Kernphys, Zulpicherstr 77, D-50937 Cologne, Germany
[5] Rudjer Boskovic Inst, Bijenicka Cesta 54, Zagreb 10000, Croatia
关键词
NUCLEAR-PHYSICS; STELLAR NUCLEOSYNTHESIS; LEVEL DENSITY; LESS-THAN; FERMI GAS; R-PROCESS; MODEL; STRENGTH; POTENTIALS; SCATTERING;
D O I
10.1140/epja/i2019-12738-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
.Cross section measurements of (p,) reactions on the Mo isotopes have been performed at beam energies from 2 to 6.2 MeV that are relevant to the p-process. Partial cross sections and isomeric ratios were also determined for the Mo-92 case. Astrophysical S factors as well as reaction rates were derived from the experimental cross sections. Statistical model calculations were performed using the latest version (1.9) of the statistical model code TALYS and were compared with the new data. An overall good agreement between theory and experiment was found. In addition, the effect of different combinations of the nuclear input parameters entering the stellar reaction-rate calculations was investigated. It was found that, for certain combinations of optical-model potentials, nuclear level densities and -ray strength functions, the nuclear uncertainties propagated through the Hauser-Feshbach calculations are less than a factor of 2 which is well below the average discrepancies of the calculated p-nuclei abundances and the observations.
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页数:17
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