Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Immobilization of the rare earth fraction in lanthanide phosphates
  LnPO4. Radiation and hydrolytic resistance of the matrix   Radiation and hydrolytic resistance of
Eu0.054Gd0.014Y0.05La0.111Ce0.2515Pr0.094Nd0.3665Sm0.059PO4 with monazite
structure has been studied. The powders were obtained by deposition from
solutions. Ceramic specimens with relative density ~97% were obtained by Spark
Plasma Sintering (heating rate Vh = 50 {\deg}C/min, sintering temperature Ts =
1070 {\deg}C, sintering time ts = 18 min). Irradiation by accelerated electrons
up to dose of 10^9 Ge was found not to result in a destruction of the target
phase. After the irradiation, an increasing of the leaching rate by an order of
magnitude (up to ~10^{-8} g/(cm2*day)) and a reduction of the mechanical
properties by 32% as compared to the non-irradiated ceramic specimen were
observed.

5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs