1. T. E. Sharp and J. T. Dowell, J. Chem. Phys. 46, 1530 (1967).JCPSA60021-9606
2. G. J. Schulz and R. K. Asundi, Phys. Rev. 158, 25 (1967).PHRVAO0031-899X
3. D. Rapp, T. E. Sharp, and D. D. Briglia, Phys. Rev. Letters 14, 533 (1965).PRLTAO0031-9007
4. J. N. Bardsley, A. Herzenberg, and F. Mandl, Proc. Phys. Soc. (London) 89, 321 (1966).PPSOAU0370-1328
5. Y. Demkov, Phys. Letters 15, 235 (1965). Note, however, that while Demkov’s semiquantitative explanation of the H2 isotope effect is essentially correct, his estimate of the pre‐exponential factor in the cross section is not generally right, mainly due to the absence of the Γa/Γd factor in Eq. (3).PHLTAM0031-9163