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Electric quadrupole strength functions have been deduced from averages of a large number of E2 transition strengths calculated within the shell model for the nuclides 94Mo and 95Mo. These strength functions are compared with phenomenological approximations as provided by the Reference Input Parameter Library (RIPL) for calculations of reaction rates on the basis of the statistical model. The low-energy behavior of the calculated strength functions differs from the one of the phenomenological E2 strength functions and may be used to improve the input for calculations of reaction rates.

Magnetic dipole strength functions have been deduced from a large number of M1 transition strengths calculated within the shell model for the nuclides 94Mo, 95Mo, and 90Zr. An enhancement of M1 strength toward low energy has been found for all nuclides considered. This enhancement supports results of recent (3He,3He') and (d,p) experiments, but is at variance with analytical M1 strength functions currently given in reaction-data libraries and used in statistical-reaction codes.

A systematic study of the depopulation of superdeformed rotational bands in neutron-deficient A approximate to 80-90 nuclei has been performed. We observed a correlation between the rotational frequency at which the decay out of the superdeformed bands takes place and the difference between the transition quadrupole moments of states in the superdeformed bands and high-lying states with normal deformation. The observation may constitute direct experimental evidence that the commonly adopted tunneling picture for the decay of superdeformed states is valid., QC 20100525 QC 20110926

Dications possess unusual electronic structures and bonding configurations. They display high energy releases and thus may serve as prototypes for molecular systems which have enormous energy per unit mass. This program combines a parallel experimental and theoretical approach to the study of gaseous molecular dication species. This includes spectroscopy, kinetics and reactions, and high level electronic structure calculations. Broad survey calculations with complete active space self-consistent field (CAS-SCF) wavefunctions have been carried out to characterize many of the hydride, fluoride, and oxide dication species. Highly accurate multireference configuration interaction (MR-CI) wavefunctions have established the electronic structures and stabilities of species such as CF2+, F22+, HS2+, NF2 2+, N2 2+, C2 2+, and PH. Vibrational and rotational constants, tunneling lifetimes, and transition strengths are obtained, providing to the experimental studies. Reactive studies have been carried out in a crossed beam arrangement on CO2+, NO2+, and HC with rare gases, and hydrogen. Selective product channels are observed and cross sections obtained. High resolution laser spectroscopy of the 3 pi sub u - 3 pi sub g transition in N2 2+ has been obtained in a coaxial laser/beam apparatus by monitoring the threshold appearance of predissociated fragments. Detailed vibrational and rotational constants are obtained. Ions, Dications, Aaser, Ab initio, Theoretical.