Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dependence of spin induced structural transitions on level density and
  Neutron emission spectra   The impact of spin induced deformation and shape phase transitions on nuclear
level density and consequently on neutron emission spectra of the decay of
compound nuclear systems 112^Ru to 123^Cs (N = 68 isotones) is investigated in
a microscopic framework of Statistical theory of superfluid nuclei. Our
calculations are in good accord with experimental data for evaporation residue
of 119^Sb^* and 185^Re^* and show a strong correlation between spin induced
structural transitions and NLD. We find that the inverse level density
parameter K increases with increasing spin for all the systems, but it
decreases with a deformation or a shape change that results in the enhancement
of level density and emission probability. A sharp shape phase transition from
oblate to uncommon prolate non-collective in well deformed nuclei leads to band
crossing and enhancement of level density which fades away while approaching
sphericity at or near shell closure manifesting shell effects.

21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys