Accession Number:

ADA222561

Title:

Study of Short-Lived Unstable Nuclei by Means of Laser Optical Pumping

Descriptive Note:

Final rept.

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF PHYSICS

Personal Author(s):

Report Date:

1990-06-04

Pagination or Media Count:

158.0

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 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.

Subject Categories:

  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE