Separable Approximations to the Helium Trimer
作者:
Roger Loucks,
J. S. Levinger,
期刊:
Annalen der Physik
(WILEY Available online 1991)
卷期:
Volume 503,
issue 1‐3
页码: 115-120
ISSN:0003-3804
年代: 1991
DOI:10.1002/andp.19915030111
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractWe extend Blatt's and Lim's calculations for the energy of the helium trimer (4He)3, for a Herzfeld potential. We use the unitary pole approximation. We constrain the effective range and scattering lenght to values of 7.4 A and infinity, respectively. As the core radius increases from 0 to 2.8 A, the trimer energy increases monotonically from −97 to −59 millikelvin. The Yamaguchi potential gives a trimer energy of −123 mK. Two additional two‐body parameters suffice to fit these, and earlier, calculations of the trimer energy: i.e., the expectation value of the kinetic energy for the dimer, and Sprung's wound int
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