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The low-spin structure of 93Nb has been studied using the (n,n'gamma) reaction at neutron energies ranging from 1.5 to 3 MeV and the 94Zr(p,2ngamma)93Nb reaction at bombarding energies from 11.5 to 19 MeV. States at 1779.7 and 1840.6 keV, respectively, are proposed as mixed-symmetry states associated with the pi2p(1/2)-1x(2(1),MS+,94Mo) coupling. These assignments are derived from the observed M1 and E2 transition strengths to the 2p(1/2)-1x(2(1)+,94Mo) symmetric one-phonon states, energy systematics, spins and parities, and comparison with shell model calculations.

The 685 keV excitation energy of the first excited 0 + state in 152 Sm makes it an attractive candidate to explore expected two-phonon excitations at low energy. Multiple-step Coulomb excitation and inelastic neutron scattering studies of 152 Sm are used to probe the E2 collectivity of excited 0 + states in this "soft" nucleus and the results are compared with model predictions. No candidates for two-phonon K π = 0 + quadrupole vibrational states are found. A 2 + , K = 2 state with strong E2 decay to the first excited K π = 0 + band and a probable 3 + band member are established.

Inertial range energy transfer, decorrelation, and energy spectra are studied analytically and numerically for strongly anisotropic magnetohydrodynamic (MHD) turbulence augmented by electron density evolution. The model is relevant to interstellar turbulence and magnetic turbulence in fusion devices. For long wavelengths (compared to the ion gyroradius), magnetic and kinetic energies are equipartitioned through interactions that decorrelate on the Alfvénic time scale. Internal energy transfer is governed by advection and decorrelates on the eddy turnover time scale. For short wavelengths, the roles of internal and kinetic energy reverse. Magnetic and internal energies are equipartitioned by the kinetic Alfvén interaction, while kinetic energy evolves under a decoupled fluid straining interaction. The spectral indices for magnetic, kinetic, and internal energies are −3/2, −3/2, and −7/4 for long wavelengths, and −2, −5/3, and −2 for short wavelengths.

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