Hyperfine Pressure Shift and Van der Waals Interaction. III. Temperature Dependence

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Abstract
A theoretical study of the temperature dependence of the pressure shifts of the hyperfine constants (HPS) for hydrogen-helium and nitrogen-helium systems over the temperature range 30 to 1000° K indicates that the temperature variations are well above the limits of detect-ability. An interesting peak is observed for the HPS in the hydrogen-helium system at 325° K and it is suggested that the occurrence of such peaks provides an experimental handle on the relative signs of the long-range and short-range contributions to HPS.