High-spin states in /sup 207/At

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.23.272· OSTI ID:7092057

Sjoreen, T P; Garg, U; Fossan, D B

The properties of high-spin states in /sup 207/At have been studied with the /sup 204/Pb(/sup 6/Li,3n)/sup 207/At reaction. In-beam measurements with Ge(Li) and intrinsic Ge detectors of ..gamma..-..gamma.. coincidences, ..gamma..-ray angular distributions, pulsed-beam ..gamma.. timing, and perturbed angular distributions with an applied magnetic field were made to determine a decay scheme, level energies, ..gamma..-ray multipolarities, spin-parity assignments, an isomeric lifetime, and a g factor. High-spin states up to 25/2h were identified as either proton excitations of the (N=126) /sup 211/At nucleus coupled to the /sup 204/Pb Z=82 ground state or neutron excitations of /sup 204/Pb coupled to the (..pi..h/sub 9/2/)/sup 3/ 9/2/sup -/ ground state of /sup 211/At. Lifetime and g-factor measurements of the 25/2/sup +/ 2117-keV isomer, which yielded values of tau=156(3) nsec and g=0.30(1), respectively, strongly support a ..pi..h/sub 9/2/)/sup 3/9/2/sup -/, (..nu..f/sub 5/2/)/sup -1/(..nu..i/sub 13/2/)/sup -1/9/sup -/;25/2/sup +/> configuration for this level.

• Research Organization: Department of Physics, State University of New York, Stony Brook, New York 11794
• OSTI ID: 7092057
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 23:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALPHA DECAY RADIOISOTOPES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
ASTATINE 207
ASTATINE ISOTOPES
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
DATA
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ELECTROSTATIC ACCELERATORS
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
GAMMA SPECTRA
HEAVY ION REACTIONS
HEAVY NUCLEI
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
INFORMATION
ISOTOPES
LANDE FACTOR
LEAD 204 TARGET
LIFETIME
LITHIUM 6 REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MULTIPOLARITY
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
PERTURBATION THEORY
RADIOISOTOPES
SHELL MODELS
SPECTRA
SPIN
TARGETS
VAN DE GRAAFF ACCELERATORS