Molecular Ordering and Even-Odd Effect in a Homologous Series of Nematic Liquid Crystals

is somewhat smaller than the theoretical value 0.76 eV, obtained from the transition probabilities of McGuire. '~ According to our observations the widths of the Auger lines are very nearly the same for both groups, in contradistinction to the photoelectron measurements by Yin et al. ' from solid target. This may mean that the I-,L, M, Coster-Kronig transition is possible in the metal because of the effect of extra-atomic relaxation, ' but this transition is cut off in free atoms, in which relaxation energy is not available. According to Table II of Yin et al. ,' where the widths of 12 and I-3 vacancy states are computed from Green's potential, the result is that the I-, width is reduced from 0.865 eV in the solid to 0.63 eV in the free atom, which is nearly the same as the 0..65 eV I 3 Width. The authors are indebted to Professor E. E. Lahteenkorva for many helpful discussions. 'S. P. Kowalczyk, B. A. Pollak, F. R. McFeely, L. Ley, and D. A. Shirley, Phys. Rev. 8 8, 2387 (1973). L. Yin, T. Tsang, I. Adler, and E. Yellin, J. Appl. Phys 43 3464 (1972) L. Yin, I. Adler, M. H. Chen, and B. Crasemann, Phys. Bev. A 7, 897 (1978). L. Yin, I. Adler, T. Tsang, M. H. Chen, and B. Crasemann, Phys. Lett. 46A, 118 (1978). 'S. Aksela, M. Pessa, and M. Karras, Z. Phys. 237, 381 (1970). 6J. Vayrynen, S. Aksela, and H. Aksela, to be published. 'S. Aksela and H. Aksela, to be published. H. Aksela and S. Aksela, to be published. S. Hagmann, G. Herrriann, and W. Mehlhorn, Z. Phys. 266, 189 (1974). 'OE. J. McGuire, Sandia Research Laboratories Research Report No. SC-BB-710075 (unpublished) . M, Gryzinski, Phys. Bev. 138, A336 (1965). ' E. J. McGuire, Phys, Rev. A 3, 1801 (1971).