Nicholas Stone

Abstract:

The first fully on-line use of the angular distribution of beta emission in detection of NMR of nuclei oriented at low temperatures is reported. The magnetic moments of the single valence particle, intermediate mass, isotopes 67Ni(nup(-1)(1/2);1/2(-)) and 69Cu(pip(1)(3/2);3/2(-)) are measured to be +0.601(5) &mgr;(N) and +2.84(1) &mgr;(N), respectively, revealing only a small deviation from the neutron p(1/2) single-particle value in the former and a large deviation from the proton p(3/2) single-particle value in the latter. Quantitative interpretation is given in terms of core polarization and meson-exchange currents.

Abstract:

The technique of beta -NMR/ON and its use for measurement of nuclear magnetic moments is briefly reviewed. Recent magnetic moment measurements are reported on Ni-67 and Cu-67. The relevance of magnetic moments of single-particle (hole) states for study of effects of configuration mixing and mesonic exchange currents is discussed.

Abstract:

The present state and future plan far the updated table of nuclear magnetic dipole and electric quadrupole moments is outlined. Topics briefly reviewed concerning developments in the field of nuclear moment studies in the nineties include extension of experimental support for the theoretical treatment of exchange current effects in nuclear magnetic moments, improvements in measurements on short-lived excited states by the transient field method, and a caution regarding the need for good hyperfine anomaly [Bohr-Weisskopf effect] studies. New methods for quadrupole moment measurement and theoretical limitations on electric quadrupole moments based on the best Lt-mesic atom and atomic HFS studies are described.

Abstract:

Statistical model of beta-delayed proton emission is briefly reviewed. Theory of angular distribution of beta-delayed proton emission from nuclear states oriented at low temperatures is discussed and the design of the first trial experiment using Cs-118 oriented at low temperature at the ISOLDE/NICOLE facility at CERN is described.