Neutrino absorption by hot nuclei in supernova environments

被引：13

作者：

Dzhioev, Alan A. ^{[1
]}

Vdovin, A. I. ^{[1
]}

Wambach, J. ^{[2
,3
]}

机构：

[1] Dubna Joint Nucl Res Inst, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia

[2] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[3] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany

来源：

PHYSICAL REVIEW C | 2015年 / 92卷 / 04期

关键词：

CORE-COLLAPSE SUPERNOVAE; SHELL-MODEL CALCULATIONS; WEAK INTERACTION RATES; THERMO FIELD-DYNAMICS; MASS RANGE A=45-65; STRENGTH DISTRIBUTIONS; STELLAR COLLAPSE; SPHERICAL NUCLEI; ELECTRON-CAPTURE; CROSS-SECTIONS;

D O I：

10.1103/PhysRevC.92.045804

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：

Using the thermal quasiparticle random-phase approximation, we study the process of neutrino and antineutrino capture on hot nuclei in supernova environments. For the sample nuclei Fe-56 and Ge-82 we perform a detailed analysis of thermal effects on the strength distribution of allowed Gamow-Teller (GT) transitions which dominate low-energy charged-current neutrino reactions. The finite-temperature cross sections are calculated taking into account the contributions of both allowed and forbidden transitions. The enhancement of the low-energy cross sections is explained by considering thermal effects on the GT(+/-) strength. For Fe-56 we compare the calculated finite-temperature cross sections with those obtained from large-scale shell-model calculations.

引用

页数：13

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