Abstract
The stochastic variational method (SVM) is used in conjunction with stabilization ideas in order to compute low-energy phase shifts. The method is tested by applying it to a simple model problem, and to s-wave positron-hydrogen scattering. The SVM is then applied to the calculation of the s- and p-wave phase shifts for Ps-H scattering. The scattering lengths obtained were 4.34a(0) for the electronic-spin-singlet state and 2.22a(0) for the triplet state. The present scattering lengths are probably accurate to +/-3% and are the most accurate that have so far been computed for the Ps-H systems.
| Original language | English |
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| Pages (from-to) | 032703.1-032703.8 |
| Number of pages | 8 |
| Journal | Physical Review A (Atomic, Molecular and Optical Physics) |
| Volume | 65 |
| Issue number | 3 |
| DOIs |
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| Publication status | Published - 2002 |