Isomers in three doubly odd Fr-At-Bi. alpha. -decay chains

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.1209· OSTI ID:7199348

Huyse, M; Decrock, P; Dendooven, P; Reusen, G; Van Duppen, P; Wauters, J ^[1]

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1. LISOL, Instituut voor Kern-en Stralingsfysica, K. U. Leuven, Celestijnenlaan 200D, B-3001 Leuven (Belgium)

The {sup 206}Fr{r arrow}{sup 202}At{r arrow}{sup 198}Bi, {sup 204}Fr{r arrow}{sup 200}At{r arrow}{sup 196}Bi, and {sup 202}Fr{r arrow}{sup 198}At{r arrow}{sup 194}Bi {ital a}-decay chains have been studied by standard spectroscopic techniques using an on-line isotope separator. All the studied doubly odd isotopes have at least two isomers, which decay by a combination of the following decay modes: {ital a} emission, {beta}{sup +}/EC (electron capture) decay, and internal transition (IT). The internal transition, a highly retarded {ital E}3, is the {ital j}-forbidden transition between the ({pi}{ital h}{sub 9/2}{direct product}{nu}{ital i}{sub 13/2}){sub 10}{sup {minus}} and the ({pi}{ital h}{sub 9/2}{direct product}{nu}{ital f}{sub 5/2}){sub 7}{sup +} states. The {ital B}({ital E}3) values of these IT's together with their energy behavior as a function of the neutron and proton number, compared to the energy difference between the 13/2{sup +}({nu}{ital i}{sub 13/2}) and 5/2{sup {minus}}({nu}{ital f}{sub 5/2}) states in the odd-mass Pb isotones, indicate that these proton-neutron-coupled states have a rather pure shell-model character.

• OSTI ID: 7199348
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 46:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663210* -- Ground-State Radioactivity-- (1992-)
663580 -- Nuclear Mass Ranges-- A=190-219-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
ASTATINE ISOTOPES
BETA DECAY
BETA-PLUS DECAY
BISMUTH ISOTOPES
CONVERSION
DECAY
E3-TRANSITIONS
ELECTRON CAPTURE DECAY
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FRANCIUM ISOTOPES
HELIUM 4
HELIUM ISOTOPES
INTERNAL CONVERSION
ISOMERIC NUCLEI
ISOTOPES
LIGHT NUCLEI
MULTIPOLE TRANSITIONS
NUCLEAR DECAY
NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
STABLE ISOTOPES