Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasiclassical description of bremsstrahlung accompanying alpha decay
  including quadrupole radiation   We present a quasiclassical theory of alpha decay accompanied by
bremsstrahlung with a special emphasis on the case of 210Po, with the aim of
finding a unified description that incorporates both the radiation during the
tunneling through the Coulomb wall and the finite energy E_gamma of the
radiated photon up to E_gamma on the order of Q_alpha/sqrt(eta), where Q_alpha
is the alpha-decay Q-value and eta is the Sommerfeld parameter. The corrections
with respect to previous quasiclassical investigations are found to be
substantial, and excellent agreement with a full quantum mechanical treatment
is achieved. Furthermore, we find that a dipole-quadrupole interference
significantly changes the alpha-gamma angular correlation. We obtain good
agreement between our theoretical predictions and experimental results.

31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol