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Journal of Low Temperature Physics

, Volume 102, Issue 3–4, pp 241–247 | Cite as

Direct measurement of the crystal field splitting of isolated J=1 impurities in solid parahydrogen

  • R. M. Dickson
  • T. J. Byers
  • T. Oka
Rapid Communication

Abstract

The crystal field splitting of single J=1 impurity orthohydrogen molecules in an otherwise pure J=0 parahydrogen crystal has been studied experimentally and theoretically over many years. We have measured this quantity directly from the fine structure of the Q3 (0) (v = 3← 0, J = 0← 0) overtone transition induced by J=1 hydrogen, in the near infrared using a Ti:sapphire laser. From our observed eight pairs of split spectral lines, we have determined the value Δ/k = [E(M=±1) − E(M=0)]/k = 0.0102 ± 0.0003 K including its sign. A straightforward numerical calculation based on ab initio calculations of the H2-H2 potential reproted by Mulder, van der Avoird, and Wormer gives Δ/k = 0.0116 K which is close to the experimental value. This suggests that the static and dynamic effects of phonons on the splitting may have been overestimated in the past.

PACS numbers

33.70 Cfj 33.20 E 78.30 J 

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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • R. M. Dickson
    • 1
  • T. J. Byers
    • 1
  • T. Oka
    • 1
  1. 1.Department of Chemistry and Department of Astronomy and AstrophysicsThe University of ChicagoChicagoUSA

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