Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The $A_T$ emission of KCl:Tl interpreted as a double $A_T+A_X$ emission   The experimental evidence of an anomalous behavior in the decay times of
Tl$^+$-like impurity centers in alkali-halide crystals has generated a revival
of interest with respect to these materials. We discuss here about the
possibility that the $A_T$ emission of KCl:Tl can be considered as a double
emission, namely as a superposition of the $A_T$ and $A_X$ emission bands. The
plausibility of this hypothesis is discussed in the light of the available, old
and recent, experimental features. A quantitative test of this assumption is
performed in the framework of a model which demonstrates to be suitable for
interpreting other similar cases.

19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat