Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible stimulation of nuclear alpha-decay by superfluid helium   It is suggested that superfluid helium (condensate of 4-He atoms) may
stimulate nuclear alpha-decay in a situation when an alpha-emitter moves
through superfluid helium with fine-tuned velocity, so that the
backward-emitted alpha-particle is at rest in the laboratory frame. It is shown
that the probability of stimulated alpha-decay in this case may be sizable
enough to be detected.

8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas