Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gamow-Teller strength distributions at finite temperatures and electron
  capture in stellar environments   We propose a new method to calculate stellar weak-interaction rates. It is
based on the Thermo-Field-Dynamics formalism and allows the calculation of the
weak-interaction response of nuclei at finite temperatures. The thermal
evolution of the GT$_+$ distributions is presented for the sample nuclei $^{54,
56}$Fe and ~$^{76,78,80}$Ge. For Ge we also calculate the strength distribution
of first-forbidden transitions. We show that thermal effects shift the GT$_+$
centroid to lower excitation energies and make possible negative- and
low-energy transitions. In our model we demonstrate that the unblocking effect
for GT$_+$ transitions in neutron-rich nuclei is sensitive to increasing
temperature. The results are used to calculate electron capture rates and are
compared to those obtained from the shell model.

32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math