Ground-state nuclear magnetic moment measurements using beta-NMR spectroscopy and tilted foil polarization

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:387191

Rogers, W F; Schulitz, R; Troischt, P; Zajac, D ^[1]

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1. and others

Experiments at U. of Rochester (NSRL) and at Argonne National Lab, designed to measure the ground state nuclear magnetic moments of short-lived mirror isotopes in the sd-shell ({sup 23}Mg, T{sub {1/2}} = 11.3 s) and the f{sub 7/2}-shell ({sup 43}Ti, T{sub {1/2}} = 0.49 s, and {sup 45}V, T{sub {1/2}} = 0.54 s) are presented. Reaction products are mass separated using the Rochester RMS ({sup 23}Mg) or the Argonne FMA ({sup 43}Ti, {sup 45}V), polarized by passage through tilted carbon foils and implanted in a crystal host which is surrounded by an rf coil and immersed in an external magnetic holding field. Anisotropic {Beta}-emission serves as signature of ensemble polarization, and a frequency scan of the applied rf locates the nuclear magnetic resonance when decay asymmetry vanishes. Adequate decay asymmetry has been observed for {sup 23}Mg in cooled MgO and Pt host crystals, resulting in a few rf scans and a preliminary magnetic moment value. Sufficient production yield and separation of {sup 43}Ti and {sup 45}V have been observed, and polarization tests are currently underway. Progress for these systems as well as improvement on the {sup 23}Mg moment will be presented.

• OSTI ID: 387191
• Report Number(s): CONF-931044--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
GROUND STATES
MAGNESIUM 23
NMR SPECTRA
NUCLEAR MAGNETIC MOMENTS
NUCLEAR STRUCTURE
TITANIUM 43
VANADIUM 45