Location of the Fourth, Forbidden Factor Group Component of the ¹B_2u State of Crystalline Benzene
There have been two different experimental techniques used to locate the position of the fourth, forbidden factor group component of the 1B2u state of crystalline benzene. The method of variation of e...

Photoactivation Study of Internally Converted Vibrationally Excited Cyclobutanone-2-t

1. H. B. G. Casimir and D. Polder, Phys. Rev. 73, 360 (1948).
   
2. For a very recent review of these methods, see E. A. Power, Advan. Chem. Phys. 12, 167 (1967).
   
3. See also the list of references in W. J. Meath and J. O. Hirschfelder, J. Chem. Phys. 44, 3210 (1966).
   
4. G. Feinberg and J. Sucher, Phys. Rev. 139, B1619 (1965).
   
J. Softer and J. Sucher, Phys. Rev. 161, 1664 (1967).

5. A result similar to our Eq. (1) occurs in the work of C. Mavroyannis and M. J. Stephen, Mol. Phys. 5, 629 (1962).
   
However, these authors have only included the contribution to the magnetic polarizability coming from orbital magnetic moments, omitting the spin moments and the diagmagnetic terms. Hence what is effectively their expression for _M is seriously inadequate for most systems, in particular for hydrogen atoms.

6. See, e.g., J. H. Van Vleck, Electric and Magnetic Susceptibilities (Oxford University Press, London, 1931).
   
7. G. Breit and I. I. Rabi, Phys. Rev. 38, 2082 (1931).
   
8. For a discussion of measurements of the retarded van der Waals attraction, see B. V. Deriagin and I. I. Abrikosova, Sov. Phys.—JETP 3, 819 (1957)
   
[Zh. Eksp. Teor. Fiz. 3, 993 (1956)].