Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The quantum interference effects in the Sc II 4247 A line of the Second
  Solar Spectrum   The Sc II 4247 A line formed in the chromosphere is one of the lines well
known, like the Na I D_2 and Ba II D_2, for its prominent triple peak structure
in Q/I and the underlying quantum interference effects governing it. In this
paper, we try to study the nature of this triple peak structure using the
theory of F-state interference including the effects of partial frequency
redistribution (PRD) and radiative transfer (RT). We compare our results with
the observations taken in a quiet region near the solar limb. In spite of
accounting for PRD and RT effects it has not been possible to reproduce the
observed triple peak structure in Q/I. While the two wing PRD peaks (on either
side of central peak) and the near wing continuum can be reproduced, the
central peak is completely suppressed by the enhanced depolarization resulting
from the hyperfine structure splitting. This suppression remains for all the
tested widely different 1D model atmospheres or for any multi-component
combinations of them. While multidimensional radiative transfer effects may
improve the fit to the intensity profiles, they do not appear capable of
explaining the enigmatic central Q/I peak. This leads us to suspect that some
aspect of quantum physics is missing.

25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph