Decay of mass-separated /sup 199/Po/sup m/ and /sup 199/Po/sup g/

Journal Article · Fri Feb 01 04:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.582· OSTI ID:6158719

Stone, R E; Bingham, C R; Riedinger, L L; Lide, R W; Carter, H K; Mlekodaj, R L; Spejewski, E H

Sources of /sup 199/Po/sup m/ and /sup 199/Po/sup g/ have been produced and mass separated on line. Multiscaled spectra of ..gamma.. rays, x rays, and conversion electrons, and ..gamma..-..gamma.. and ..gamma..-x-ray coincidences were measured. The M4 isomeric transition of the (13/2)/sup +/ state of /sup 199/Po, with a half-life of 4.17 min, was observed for the first time, permitting the placement of the (13/2)/sup +/ and (5/2)/sup -/ levels above the (3/2)/sup -/ ground state. Also, the placement of the (13/2)/sup +/ state in Po together with previously reported ..cap alpha..-decay Q values made possible the location of the (13/2)/sup +/ isomeric state in /sup 195/Pb. From an analysis of ..gamma..-..gamma..-t coincidence data and energy sums, 26 transitions were placed in a decay scheme between 23 levels in /sup 199/Bi. On the basis of systematics the population of a (1/2)/sup +/ isomeric state in /sup 199/Bi was deduced. The isomeric (M4) transition to the (9/2)/sup -/ ground state was not observable in the present data; its rate is at least 390 times less than the Weisskopf single particle estimate.

• Research Organization: The University of Tennessee, Knoxville, Tennessee 37996 and Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 6158719
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651922* -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BISMUTH 199
BISMUTH ISOTOPES
COINCIDENCE SPECTROMETRY
CONVERSION
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
GAMMA SPECTRA
HALF-LIFE
HEAVY NUCLEI
INTERNAL CONVERSION
IONIZING RADIATIONS
ISOMERIC TRANSITIONS
ISOTOPES
LEAD 195
LEAD ISOTOPES
M4-TRANSITIONS
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NUCLEI
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
POLONIUM 199
POLONIUM ISOTOPES
Q-VALUE
RADIATIONS
RADIOISOTOPES
SPECTRA
SPIN
X RADIATION