Spectroscopy of /sup 213/At, /sup 212/Po, and /sup 210/Pb following /sup 208/Pb+/sup 7/Li
The bombardment of /sup 208/Pb by /sup 7/Li ions has been used to study the properties of excited states in /sup 213/At, /sup 212/Po, and /sup 210/Pb. In-beam measurements with Ge(Li), intrinsic Ge, and Si surface barrier detectors of ..cap alpha..-decay excitation functions, ..cap alpha..-..gamma.. coincidences, ..gamma..-..gamma.. coincidences, ..gamma..-ray angular distributions, and pulsed-beam-..gamma.. timing were made to establish decay schemes, level energies, ..gamma..-ray multipolarities, spin-parity assignments, and isomeric lifetimes. Excited states with spins up to 19/2 h in /sup 213/At and 6 h in /sup 212/Po were identified. The mean lifetimes of the 1272-keV 8/sup +/ and 1193-keV 6/sup +/ states in /sup 210/Pb were measured to be 225(22) and 30(10) nsec, respectively. These lifetimes imply B(E2) values of 51(12) e/sup 2/ fm/sup 4/ for the 8/sup +/ state and 308(115) e/sup 2/ fm/sup 4/ for the 6/sup +/ state. The /sup 213/At decay scheme and the /sup 210/Pb B(E2) values are compared with shell model calculations.
- Research Organization:
- Department of Physics, State University of New York, Stony Brook, New York 11794
- OSTI ID:
- 5387199
- Journal Information:
- Phys. Rev., C; (United States), Vol. 21:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASTATINE 213
ENERGY LEVELS
LEAD 208 TARGET
LITHIUM 7 REACTIONS
LEAD 210
COMPOUND-NUCLEUS REACTIONS
POLONIUM 212
ALPHA DECAY
ANGULAR DISTRIBUTION
COINCIDENCE SPECTROMETRY
EXCITATION FUNCTIONS
GAMMA SPECTRA
LIFETIME
PARITY
SHELL MODELS
SPIN
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
ASTATINE ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DECAY
DISTRIBUTION
EVEN-EVEN NUCLEI
HEAVY ION REACTIONS
HEAVY NUCLEI
ISOTOPES
LEAD ISOTOPES
MATHEMATICAL MODELS
NANOSEC LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
POLONIUM ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
TARGETS
YEARS LIVING RADIOISOTOPES
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