Study of Short-Lived Unstable Nuclei by Means of Laser Optical Pumping
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF PHYSICS
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The effectiveness of laser-induced nuclear orientation in the study of short-lived unstable nuclei using radiation detection has been increased by the use of saturation spectroscopy to produce sub-Doppler resolved changes in the anisotropic spatial distribution of the 514-keV gamma rays from the 1 - mu-s isomer Rb85m. The width HWHM of these change signals is about 60 MHz, a factor of ten better than Doppler-broadened signals previously obtained. This technique has been used to study the D1 and D2 transitions for the isomer. Precise values of the hyperfine A and B coefficients have been determined, and used to extract a value for the nuclear magnetic dipole moment 6.043 or - . 005 mu sub N, and, for the first time, a measured value of the nuclear quadrupole moment -.73 or - .17b. Additionally, and a new, more accurate value for the isomer shift -113 or - 5MHz has been determined. Theses.
- Nuclear Physics and Elementary Particle Physics