Show simple item record

dc.creatorChan, Man-Choren_US
dc.creatorSarka, K.en_US
dc.creatorOka, T.en_US
dc.date.accessioned2006-06-15T18:03:49Z
dc.date.available2006-06-15T18:03:49Z
dc.date.issued1987en_US
dc.identifier1987-TF-1en_US
dc.identifier.urihttp://hdl.handle.net/1811/17345
dc.description$^{1}$ Wigner, E.P. Z. Phys. Chem. B 1933, 23, 28 $^{2}$ Van Vleck, J.H. Revs. Mod. Phys. 1951, 23, 213 $^{3}$ Curl, Jr., R.F., Kasper, J.V.V., and Pitzer, K.S. J. Chem. Phys 1967, 46, 3220en_US
dc.descriptionAuthor Institution: Department of Chemistry and Department of Astronomy and Astrophysics, The University of Chicago; Department of Physics, India Institute of Technologyen_US
dc.description.abstractThe nuclear spin-rotation interaction Hamiltonian of polyatomic molecules with different symmetries has been derived with respect to the molecule-fixed axes. Terms diagonal in the basis set | IJFMF) cause nuclear hyperfine structure whereas the off-diagonal ones give rise to the conversion between different nuclear spin states. The basic difference between them is the symmetry upon permuting the spin coordinates of identical nuclei. Based on Wigner's idea on the stability of ortho- and para- hydrogen,1 a group theoretical method is developed to discriminate the diagonal terms from the off-diagonal ones. We use an extended group in which pure nuclear permutation operations are added to the usual molecular symmetry group. The diagonal terms are totally symmetric to these added operations while the non-diagonal terms are not. Van Vleck's reverse angular momentum method2 has been applied to evaluate the off-diagonal matrix elements. We estimate the order of magnitude of the conversion rate3 due to this interaction and discuss some experimental observations.en_US
dc.format.extent194565 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleFORBIDDEN ROTATION TRANSITIONS BETWEEN NUCLEAR SPIN MODIFICATIONS IN POLYATOMIC MOLECULES BY NUCLEAR SPIN-ROTATION INTERACTIONSen_US
dc.typearticleen_US


Files in this item

Thumbnail

Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.

This item appears in the following Collection(s)

Show simple item record