Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Simulation Study on the Feasibility of Radio Enhancement Therapy with
  Calcium Tungstate and Hafnium Oxide Nanoparticles   Herein is a simulation study on the radio enhancement potential of calcium
tungstate (CaWO4) and hafnium oxide (HfO2) nanoparticles (NPs) relative to gold
(Au) NPs. The work utilizes the extensively studied Au NP as the "gold
standard" to which the novel materials can be compared. All three materials
were investigated in-silico with the software Penetration and Energy Loss of
Positrons and Electrons (PENELOPE) developed by Francesc Salvat and distributed
in the United States by the Radiation Safety Information Computational Center
(RSICC) at Oak Ridge National Laboratory. The aims are: (1) Do CaWO4 and HfO2
NPs function like Au?, and (2) if not, how else might they function to enhance
radio therapy? Our investigations have found that HfO2 likely functions as Au,
but not as effectively. CaWO4 likely does not function as Au, and we propose
that CaWO4 may exhibit cancer killing traits through its intrinsic UV
luminescence property.

6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
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The categories of this paper are: econ
12
The categories of this paper are: nucl-th
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The categories of this paper are: funct-an