Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precise measurement of alpha-K for the 65.7-keV M4 transition in 119Sn:
  Extended test of internal-conversion theory   We have measured the K-shell internal conversion coefficient, alpha-K, for
the 65.7-keV M4 transition in 119Sn to be 1621(25). This result agrees well
with Dirac-Fock calculations in which the effect of the K-shell atomic vacancy
is accounted for, and disagrees with calculations in which the vacancy is
ignored. This extends our precision tests of theory to Z = 50, the lowest Z yet
measured.

2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org