Beta-NMR magnetic moment measurements using on-line mass separation and tilted-foil polarization

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6163581

Rogers, W F

The methods of tilted foil nuclear polarization and on-line mass separation have for the first time been successfully applied to a Beta-Nuclear Magnetic Resonance (..beta..-NMR) technique for measuring multipole moments of ..beta..-unstable nuclei. The magnetic moment of /sup 33/Cl (T/sub 1/2/ = 2.51 s, I/sup ..pi../ = 3/2/sup +/), the mirror nucleus of /sup 33/S, was successfully measured using this arrangement. Following production by nuclear reaction, recoiling nuclei were mass separated by the Recoil Mass Spectrometer (RMS) after which they were polarized by passage through an array of tilted carbon foils, and implanted in a catcher. Nuclear polarization, monitored by detection of asymmetric ..beta..-emission, was destroyed via resonant rf excitation to locate the nuclear magnetic resonance, which was marked by a disappearance of the decay anisotropy. Tests were performed with /sup 12/B (T/sub 1/2/ = 20.4 ms, I/sup ..pi../ = 1/sup +/) which were produced via the d(/sup 11/B,/sup 12/B)p reaction, and implanted in Au. The /sup 33/Cl nuclei were produced via the d(/sup 32/S,/sup 33/Cl)n reaction, and implanted in a NaCl single crystal. The ground-state magnetic moment of /sup 33/Cl, corrected for diamagnetism, is ..mu.. = +0.7523(16) ..mu../sub n/. The results for the mass 33 mirror shell pair are discussed in terms of three separate theoretical analyses of sd-shell mirror nuclei.

• Research Organization: Rochester Univ., NY (USA)
• OSTI ID: 6163581
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHLORINE 33
CHLORINE ISOTOPES
DATA
DECAY
ENERGY LEVELS
EXPERIMENTAL DATA
GROUND STATES
INFORMATION
ION IMPLANTATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC MOMENTS
MAGNETIC RESONANCE
MASS SPECTROMETERS
MEASURING INSTRUMENTS
NUCLEAR MAGNETIC MOMENTS
NUCLEAR MAGNETIC RESONANCE
NUCLEAR PROPERTIES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
POLARIZATION
RADIOISOTOPES
RECOILS
RESONANCE
SECONDS LIVING RADIOISOTOPES
SPECTROMETERS