Levels and transitions in /sup 204/Pb and the four valence neutron-hole configurations

Journal Article · Sun May 01 04:00:00 EDT 1988 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.37.1840· OSTI ID:5265981

Hanly, J M; Hicks, S E; McEllistrem, M T; Yates, S W

Levels of the nucleus /sup 204/Pb have been investigated using the (n,n'..gamma..) reaction, and ..gamma.. rays from low-spin excited levels have been observed. Forty-three low-spin levels connected by 78 ..gamma.. rays are found below 2.9 MeV, whereas only about 28 levels had previously been known. The levels below 2 MeV excitation energy are expected to be dominated by the p/sub 1/2/, f/sub 5/2/, and p/sub 3/2/ valence neutron hole excitations, and 0/sup +/ levels at 0, 1730, and 2433.1 keV are associated primarily with these configurations. These states are at almost the same excitation energies as parent 0/sup +/ excitations in /sup 206/Pb. Approximately six unnatural-parity levels are identified; this is close to the number predicted in six orbit valence-space shell model calculations. The number of natural-parity levels found, however, is almost twice that calculated with the shell model. Levels and transitions below 2 MeV excitation energy are consistent with expectations basing /sup 204/Pb states on correlated two-hole excitations dominant in /sup 206/Pb.

• Research Organization: Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
• OSTI ID: 5265981
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 37:5; 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
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BARYON REACTIONS
CROSS SECTIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
GAMMA SPECTRA
HADRON REACTIONS
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INELASTIC SCATTERING
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD 204
LEAD 204 TARGET
LEAD 206
LEAD ISOTOPES
MATHEMATICAL MODELS
NEUTRON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARITY
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
RADIOISOTOPES
SCATTERING
SHELL MODELS
SPECTRA
SPIN
STABLE ISOTOPES
TARGETS
VALENCE
YEARS LIVING RADIOISOTOPES