Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Microscopic description of fission in neutron-rich Radium isotopes with
  the Gogny energy density functional   Mean field calculations, based on the D1S, D1N and D1M parametrizations of
the Gogny energy density functional, have been carried out to obtain the
potential energy surfaces relevant to fission in several Ra isotopes with the
neutron number 144 $\le$ N $\le$ 176. Inner and outer barrier heights as well
as first and second isomer excitation energies are given. The existence of a
well developed third minimum along the fission paths of Ra nuclei, is analyzed
in terms of the energetics of the "fragments" defining such elongated
configuration. The masses and charges of the fission fragments are studied as
functions of the neutron number in the parent Ra isotope. The comparison
between fission and $\alpha$-decay half-lives, reveals that the former becomes
faster for increasing neutron numbers. Though there exists a strong variance of
the results with respect to the parameters used in the computation of the
spontaneous fission rate, a change in tendency is observed at N=164 with a
steady increase that makes heavier neutron-rich Ra isotopes stable against
fission, diminishing the importance of fission recycling in the r-process.

18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-lat