Isotope shift and hyperfine structure of neutron deficient lead isotopes

Thesis/Dissertation · Tue Jan 01 00:00:00 EST 1980

OSTI ID:6148370

Moscatelli, F A

The isotope shift and hyperfine structure of 3 x 10/sup 5/ - y /sup 202/Pb and 52.1 - /sup 203/Pb(I = 5/2) were measured, in the 6p/sup 2/ /sup 3/P/sub 0/ - 6p7s/sup 3/p/sub 1//sup 0/ 2833 A atomic transition, as well as the nuclear spin of 1.43 x 10/sup 7/ - y /sup 205/Pb. The shifts of the stable lead isotopes were also remeasured. High resolution optical absorption spectra of an atomic vapor of lead were obtained with a 9.1-m focal length Czerny-Turner spectrometer. In this instrument a 10-inch wide diffraction grating (resolving power approx. 10/sup 6/) blazed at 61/sup 0/ is used. Spectra were recorded both photographically and photoelectrically using a high positional resolution (0.5 ..mu..m), repetitive scanning system. Absorption cells containing <10/sup 12/ atoms (approx. 1 ng) of cyclotron produced radio-isotopes were constructed. For calibration, a narrow line-width absorption beam of natural lead was employed. The use of the atomic beam allowed us to obtain isotope shift results for the stable isotopes which differ significantly from older data in the literature. In contrast to prior photographic detection, the linearity of response afforded by the photoelectric method allowed us to obtain a direct measurement of the nuclear spin of /sup 205/Pb from the hyperfine structure intensity ratios. The hyperfine structure interaction constants for the /sup 3/P/sub 1//sup 0/ level of /sup 203/Pb were found to be: A = 2013(20)MHz and absolute value of B < 45 MHz. Nuclear multipole moments were calculated from these constants: ..mu..(/sup 203/Pb) = +0.673(7)..mu../sub N/ (uncorrected and absolute value Q(/sup 203/Pb) < 0.22b (uncorrected). The magnetic dipole moment agrees with the value predicted by the nuclear shell model including configuration mixing and meson exchange contributions. The measured spin of /sup 205/Pb, I = 5/2, is in agreement with the value inferred from nuclear decay schemes.

• Research Organization: New York Univ., NY (USA)
• OSTI ID: 6148370
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
LEAD 202
HYPERFINE STRUCTURE
SPECTRAL SHIFT
LEAD 203
LEAD 205
SPIN
LEAD ISOTOPES
EXPERIMENTAL DATA
NUCLEAR ELECTRIC MOMENTS
NUCLEAR MAGNETIC MOMENTS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
DATA
DAYS LIVING RADIOISOTOPES
ELECTRIC MOMENTS
ELECTRON CAPTURE RADIOISOTOPES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INFORMATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAGNETIC MOMENTS
NUCLEAR PROPERTIES
NUCLEI
NUMERICAL DATA
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
YEARS LIVING RADIOISOTOPES
640302* - Atomic
Molecular &amp; Chemical Physics- Atomic &amp; Molecular Properties &amp; Theory
651923 - Nuclear Properties &amp; Reactions
A=190-219
Experimental- Energy Levels &amp; Transitions- (-1987)