### Abstract

We report some recent improvements on the rotation-frame cylindrical-coordinate finite-difference scheme for solving quantum evolution equations in atomic collisions. A Hermitian discretization of the Coriolis term in the rotating Hamiltonian is discussed. Illustrative results from calculations of muon capture by helium atoms are also presented. In other collision calculations involving helium, parametrized Hartree-Slater wavefunctions of helium excited states are used as final projection states. The values of the parameters for states up to 1s4f are tabulated here in the hope that they might be useful in other contexts.

Original language | English (US) |
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Pages (from-to) | 171-178 |

Number of pages | 8 |

Journal | Computer Physics Communications |

Volume | 63 |

Issue number | 1-3 |

DOIs | |

State | Published - Feb 1991 |

### ASJC Scopus subject areas

- Hardware and Architecture
- Physics and Astronomy(all)

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## Cite this

Kwong, N. H., Schaudt, K. J., & Garcia, J. D. (1991). Solution of quantum evolution equations by finite-difference.

*Computer Physics Communications*,*63*(1-3), 171-178. https://doi.org/10.1016/0010-4655(91)90247-I