Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterization of High Purity Germanium Point Contact Detectors with
  Low Net Impurity Concentration   High Purity germanium point-contact detectors have low energy thresholds and
excellent energy resolution over a wide energy range, and are thus widely used
in nuclear and particle physics. In rare event searches, such as neutrinoless
double beta decay, the point-contact geometry is of particular importance since
it allows for pulse-shape discrimination, and therefore for a significant
background reduction. In this paper we investigate the pulse-shape
discrimination performance of ultra-high purity germanium point contact
detectors. It is demonstrated that a minimal net impurity concentration is
required to meet the pulse-shape performance requirements.

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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: astro-ph