Study of Short-Lived Unstable Nuclei by Means of Laser Optical Pumping
Abstract
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 Rb(85m). 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 - .17)b. Additionally, and a new, more accurate value for the isomer shift (-113 + or - 5)MHz has been determined. Theses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 04, 1990
- Accession Number
- ADA222561
Entities
People
- Joseph P. Mackin
Organizations
- Massachusetts Institute of Technology