Particle gamma-ray angular correlation measurements have been used to study the spin alignment and magnetic-substate population parameters for the 2 + 1 (4.443 MeV) state in 12 C, populated in the 12 C( 12 C, 12 C[0 + 2 ]) 12 C(2 + 1 ) inelastic scattering reaction in the vicinity of a prominent, narrow peak in the scattering excitation function. The data show a strong alignment of the spin with the orbital angular momentum, and suggest that the cross section peak corresponds to a spin 14 + resonance at E c.m. = 28.0 MeV. This energy is close to that where a strong peak is also observed in the 0 + 1 + 0 + 2 excitation function. A comparison between the data for these two channels lends some support to recent theoretical calculations of resonance behavior for angular-momentum-mismatched channels in 12 C + 12 C inelastic scattering.The study of resonance behavior in the 12 C + 12 C system has occupied nuclear physicists for the better part of four decades. The resonances observed in various 12 C + 12 C inelastic scattering channels display a rich variety of phenomena, ranging from very narrow resonances near the Coulomb barrier, to broader (1-2 MeV wide) structures at higher bombarding energies. The common, simple and perhaps naive interpretation of these phenomena is that they correspond to large-scale collective behavior in the 12 C + 12 C sys-

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Hydrodynamic simulations of classical novae on ONe white dwarfs predict substantial production of 22 Na. Observation of 22 Na decay should be correlated with the corresponding nova because the half life of 22 Na is only 2.6 years. The 1275-keV gamma ray from the β decay of 22 Na is, therefore, an excellent diagnostic for the nova phenomenon and a long-sought target of gamma-ray telescopes. Nova simulations determine the maximum 22 Na-detection distance to be < 1 kpc for the INTEGRAL spectrometer SPI, consistent with its non-observation to date. However, model estimates are strongly dependent on the thermonuclear rate of the 22 Na(p, γ) 23 Mg reaction, which destroys 22 Na in novae. The 22 Na(p, γ) 23 Mg rate is expected to

Geomagnetic pole reversals occur frequently throughout geologic history, although one has not yet occurred in recorded time. Magnetohydrodynamic models of Earth's core have revealed that during a reversal, the magnetic dipole moment disappears, leaving higher‐order moments. Previous research examined quadrupole magnetic field topologies and quantitatively specified the magnetic equators of those topologies but did not fully examine charged particle drift motion and stability in the inner magnetosphere. Earth's closed magnetosphere is primarily dominated by two electric fields, the corotational and convection generated electric fields. trueE⃗×trueB⃗ $\vec{E}\times \vec{B}$ drifts from these fields ultimately drives the behavior of the cold plasma of the plasmasphere. In a quadrupole‐dominated magnetic field, the plasma motion generated by the trueE⃗×trueB⃗ $\vec{E}\times \vec{B}$ drifts would be dramatically different from the classical dipole field plasma convection. Three quadrupole topologies were evaluated, and the trueE⃗×trueB⃗ $\vec{E}\times \vec{B}$ drift was analyzed along the magnetic equators of these topologies to characterize and quantify the resultant plasma motion and evaluate the behavior, structure and stability of the plasmasphere. We also tested for plasmaspause and magnetopause boundary sensitivity to magnetic field strength. The direction of the convection flow is hemispherically dependent for the η = 0 and 0.5 quadrupole topologies, that is, the plasma in the Northern Hemisphere convects tailward, and the Southern Hemisphere convects sunward. The η = 1 topology demonstrates evidence of strong plasmasphere erosion due to the intersection of the magnetic equators, and the magnetopause and plasmapause of the η = 1 topology are particularly sensitive to reductions in magnetic field strength.

The non-selective 31 P(3 He,t) 31 S reaction has been studied for the first time using 20-and 25-MeV 3 He beams from the tandem Van de Graaff accelerator at Yale University's Wright Nuclear Structure Laboratory. The Yale Enge magnetic spectrograph has been used to momentum-analyze reaction products; a position-sensitive ionization drift chamber backed by a scintillator at the focal plane has been used to identify tritons and measure the excitation energies of corresponding * Speaker.