Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recursive determination of phase shifts for screened Coulomb potentials   In the calculation of hot-plasma atomic structure, the continuum
wavefunctions are characterized by phase shifts, which therefore determine the
scattering cross-sections. In this short paper, we propose a recurrence
relation for the phase shifts in the case of a particular type of parametric
potentials widely used in atomic-structure codes. These potentials have to be
linear combinations of static screened Coulomb potentials (Yukawa-type
potentials) multiplied by polynomial functions.

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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
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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: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph