Articles you may be interested inElectron momentum spectroscopy study of Jahn-Teller effect in cyclopropane J. Chem. Phys. 130, 054302 (2009); 10.1063/1.3068619Study of the molecular structure, ionization spectrum, and electronic wave function of 1,3-butadiene using electron momentum spectroscopy and benchmark Dyson orbital theories An investigation of valence shell orbital momentum profiles of difluoromethane by binary (e,2e) spectroscopyThe valence electronic structure and momentum-space electron density distributions of n-butane have been studied by means of high-resolution (e,2e) electron momentum spectroscopy based on noncoplanar symmetric kinematics. Ionization spectra for the range of binding energies 6 to 32 eV and momenta described by azimuthal angles ϭ0°, 2°, 4°, 6°, 8°, and 10°have been recorded and compared to the results of one-particle Green's function calculations, performed using the third-order algebraic-diagrammatic construction ͓ADC͑3͔͒ approximation and series of basis sets of improving quality. Experimental electron momentum profiles have been determined from a set of 11 measurements and compared to theoretical results. It has been shown that despite the complex structure of the spectral bands and the conformational versatility of n-butane, the experimental electron momentum distributions are accurately described by the momentum-space form of orbital densities obtained from Becke three-parameter Lee-Yang-Parr ͑B3LYP͒ density functional calculations. Significant broadening of the spectral lines and the s-type angular dependence of their intensities above 24 eV have been explained by the breakdown of the one-electron picture of ionization for the 3a g molecular orbital.

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Intraband E2 transitions of some 30 deformed nuclei are analysed using a generalized Michailov plot, based on an E2 transition formula in the SU (3) limit of the sdg interacting boson model. The general E2 transition formula in the sdg-IBM has an L(L + 3) term in addition to the usual SU (3) model result. It is found that the general E2 formula can describe the inband transitions well. Comparisons with other models are made. The implications of the results are also discussed.