The δ-function expansion of the modified two-particle Ursell function of a hard-sphere fluid |
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| Authors: | N Ansari B Kumar |
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| Affiliation: | (1) Physics Department, Ranchi University, 834008 Ranchi, India;(2) Department of Physics, Jamshedpur Co-operative College, 831001 Jamshedpur, India |
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| Abstract: | The expansion of the modified two-particle Ursell functionU(r) of a hardsphere quantal fluid is obtained in terms of a series of derivatives of δ-function. This expansion has been used to expand the second virial co-efficientB 2 of the fluid. The expansion is correct up to the fourth power in thermal wavelength and the terms of the order of λ8 and λ4 in the first expa nsion are new. |
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| Keywords: | Ursell function thermal wavelength second virial co-efficient |
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