G. Kumbartzki

Polarization transfer in the 4He(e→, e′ p→)3H reaction

We have measured the proton recoil polarization in the {sup 4}He(polarized-e, e-prime, p){sup 3}H reaction at Q{sup 2} = 0.5, 1.0, 1.6, and 2.6 (GeV/c){sup 2}. The measured ratio of polarization transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a predicted medium modification of the proton form factors based on a quark-meson coupling model. In contrast, the measured induced polarizations agree reasonably well with the fully relativistic calculation indicating that the treatment of final-state interactions is under control.

Magnetic moments at backbending and spectroscopy of 134Ce

Abstract Employing the static hyperfine fields at cerium nuclei in magnetized Fe and Gd hosts, the g -factor of the 134 Ce(10 + ) state at backbending ( E x = 3719.3 keV ) has been determined as g = − 0.30 (25). The coexistence of this neutron-dominated state with the ( v h 11 2 ) n 10 + isomer ( E x = 3208.5 keV, g = −0.19(1)) is unexpected. A comprehensive spectroscopic study following the 122 Sn( 16 O, 4n) reaction, including γ-angular distributions, prompt and delayed γ coincidence and recoil-distance measurements has yielded new information on quasi-collective bands of both parities. The properties of the low-lying positive-parity states are well described by the interacting boson model.

Spin precession of the12C(2 1 + ) state on recoil in polarized iron

A PAC measurement on the 4.43 MeV12C(2+) state on recoil in magnetized iron has yielded an integral precession angle of ϕ=+0.85(14) mrad, which exceeds the Lindhard-Winther prediction by about two orders of magnitude. Evidently, large magnetic fields act at nuclei traversing solids at high velocities (vrec/c = 0.03 in the present case), thereby holding out the prospect ofg-factor measurements for nuclear states in this lifetime range (τ2+ = 6.5 × 10−14 s).

Evidence for Proton Excitations in 130,132,134,136 Xe Isotopes from Measurements of g Factors of 2 + 1 and 4 + 1 States

The g factors of

Spin dependence of d5/2 neutron configurations in the wave functions of 92,94Zr from g-factor measurements

{2}_{1}^{+},

Single particle signatures in high-spin, quasicontinuum states in 193,194Hg from g-factor measurements

{4}_{1}^{+},

Precision Measurement of the Neutron Twist-3 Matrix Element d^n_2: Probing Color Forces

and

Polarization transfer in the 4HeH reaction

{2}_{2}^{+}

MAGNETIC-MOMENT MEASUREMENTS IN ZR-86

states in the stable