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Molecular Physics

Long range adiabatic potentials and scattering lengths for the EF , e and h states of the hydrogen molecule

G. STASZEWSKA T. ORLIKOWSKI

Published May 20, 1999• 8 citations
Publisher
DOI
10.1080/002689799164397

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Scattering lengths for the collisions of ground and metastable state hydrogen atoms interacting via the B′1∑u +, EF 1∑g +, e3∑u + and h3∑g + molecular potentials are evaluated from published ab initio Born-Oppenheimer potentials with adiabatic corrections, matched to multipole expansions at large interatomic separations. It is demonstrated that the scattering lengths are very sensitive to the connections between the ab initio potentials and their asymptotic forms and the need is shown for accurate interatomic potential calculations at greater separations than are currently available. The density-dependent shift and broadening of the 1S–2S transition frequency in atomic hydrogen caused by two-body elastic collisions are presented.