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1984

Physics Publications

Articles 1 - 2 of 2

Full-Text Articles in Physics

Approach To A Second-Order Nematic-Isotropic Phase Transition In A Lyotropic Liquid Crystal, Charles Rosenblatt, Satyendra Kumar, J. D. Litster Feb 1984

Approach To A Second-Order Nematic-Isotropic Phase Transition In A Lyotropic Liquid Crystal, Charles Rosenblatt, Satyendra Kumar, J. D. Litster

Physics Publications

We report on the results of a magnetic birefringence study of the nematic-isotropic transition in the lyotropic liquid crystal cesium perfluoro-octanoate in water. The transition is weakly first order at TK with mean-field divergences and a virtual second-order transition temperature that can be within 20 mK of TK.


Two-Electron Lamb Shifts And 1s2s 3s1-1s2p 3pj Transition Frequencies In Helium-Like Ions [1], S. P. Goldman, Gordon W. F. Drake Jan 1984

Two-Electron Lamb Shifts And 1s2s 3s1-1s2p 3pj Transition Frequencies In Helium-Like Ions [1], S. P. Goldman, Gordon W. F. Drake

Physics Publications

The leading terms in the 1/Z expansion of the two-electron Bethe logarithm are calculated for the states 1s2 1S0, 1s2s 1S1, 1s2s 3S1, 1s2p 1P1 and 1s2p 3PJ by the use of a novel finite basis set method. The resulting QED terms are combined with other relativistic and mass polarisation corrections to obtain total transition frequencies. The results are compared with recent measurements in helium-like ions from Li+ to Fe24+.