Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parametric M\"{o}ssbauer radiation source   Numerous applications of M\"{o}ssbauer spectroscopy are related to a unique
resolution of absorption spectra of resonant radiation in crystals, when the
nucleus absorbs a photon without a recoil. However, the narrow nuclear
linewidth renders efficient driving of the nuclei challenging, restricting
precision spectroscopy, nuclear inelastic scattering and nuclear quantum
optics. Moreover, the need for dedicated X-ray optics restricts access to only
few isotopes, impeding precision spectroscopy of a wider class of systems.
Here, we put forward a novel M\"{o}ssbauer source, which offers a high resonant
photon flux for a large variety of M\"ossbauer isotopes, based on relativistic
electrons moving through a crystal and emitting parametric M\"ossbauer
radiation essentially unattenuated by electronic absorption. As a result, a
collimated beam of resonant photons is formed, without the need for additional
monochromatization. We envision the extension of high-precision M\"{o}ssbauer
spectroscopy to a wide range of isotopes at accelerator facilities using dumped
electron beams.

20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs