Quadrupole moments of high spin isomers in sup 213 Fr, sup 212 Fr, and sup 211 Fr

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.43.514· OSTI ID:5712478

Hardeman, F; Neyens, G; Scheveneels, G; Nouwen, R; S'heeren, G; Van Den Bergh, M; Coussement, R ^[1]; Byrne, A P; Muesseler, R; Huebel, H; Baldsiefen, G ^[2]

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1. Instituut voor Kern- en Stralingsfysika, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium (BE)
2. Institut fuer Strahlen- und Kernphysik, Universitaet Bonn, Nussallee 14-16, D-5300 Bonn (West Germany)

The level mixing spectroscopy method has been applied to measure the static quadrupole moments of six isomeric states in {sup 213}Fr, {sup 212}Fr, and {sup 211}Fr ({ital Z}=87). For isomers with the proton configuration {pi}{ital h}{sub 9/2}{sup 4}{ital i}{sub 13/2} a large increase of the quadrupole moment was observed with the removal of neutrons from the closed {ital N}=126 core: {ital Q}(29/2{sup +},{sup 213}Fr)={minus}70(7) {ital e} fm{sup 2}, {ital Q}(15{sup {minus}},{sup 212}Fr)={minus}80(12) {ital e} fm{sup 2}, and {ital Q}(29/2{sup +},{sup 211}Fr)={minus}107(18) {ital e} fm{sup 2}. Quadrupole moments for very high spin states were also measured: {ital Q}(65/2{sup {minus}},{sup 213}Fr)={minus}219(53) {ital e} fm{sup 2}, {ital Q}(27{sup {minus}},{sup 212}Fr)={minus}152(31) {ital e} fm{sup 2}, and {ital Q}(45/2{sup {minus}},{sup 211}Fr) ={minus}198(56) {ital e} fm{sup 2}. The observed values are in good agreement with shell-model calculations, but are lower than that predicted using the deformed-independent particle model. The implantation behavior of Fr in a Tl host is also discussed.

• OSTI ID: 5712478
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
DATA
ELECTRON CAPTURE RADIOISOTOPES
EXPERIMENTAL DATA
FRANCIUM 211
FRANCIUM 212
FRANCIUM 213
FRANCIUM ISOTOPES
HEAVY NUCLEI
INFORMATION
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEVEL MIXING RESONANCE
MATHEMATICAL MODELS
MICROSEC LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NAN
NANOSEC LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
QUADRUPOLE MOMENTS
RADIOISOTOPES
RESONANCE
SHELL MODELS