ISOMERIC TRANSITION IN Pb$sup 20$$sup 5$

Journal Article · Sun May 15 04:00:00 EDT 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.118.1076· OSTI ID:4137109

Alburger, D E

A (26 plus or minus 1)-kev transition in Pb/sup 205/ occurring in the electron capture decay of Bi/sup 205/ was identified from its L, M, and N internal conversion electrons measured in an intermediate-image beta-ray spectrometer. By using NaI scintillation detectors behind the source in the spectrometer the M and N lines of the 26-kev transition are found to be not in coincidence with electron-capture K x rays but they are in coincidence with a principal gamma ray of 1 Mev and weak components of approximately 0.7 and approximately 0.3 Mev. Since the Bi/sup 205/ gamma rays of 987.8 and 284.2 kev and a fraction of the 703.3-kev gamma rays have been shown bv Vegors and Heath to be delayed with respect to electron-capture K x rays with a half-life of 4.8 msec, the present coincidence results indicate that the delayed radiation is associated with the 26-kev transition orlginating from an isomeric state in Pb/ sup 205/ at 1013.8 kev. The 26-kev transition is probably a quadrupole and a possible assignment is M2 if the spin-parity assignment of the 987.8-kev level is 9/2-- and if the 1013.8-kev level is the 13/2+ state predicted at 1.1 Mev by Pryce. The possibility that all or part of the known 1014.2-kev gamma radiation constitutes the "missing" M4 transition in Pb/sup 205/ is discussed. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• NSA Number: NSA-14-016321
• OSTI ID: 4137109
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 118; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BETA DETECTION
BETA SPECTROMETERS
BISMUTH 205
CAPTURE
COINCIDENCE METHODS
DECAY
ELECTRONS
ENERGY LEVELS
EXCITATION
GAMMA DETECTION
GAMMA RADIATION
HALF-LIFE
INTERNAL CONVERSION
ISOMERS
LEAD 205
MEASURED VALUES
MONOCRYSTALS
PARITY
PHYSICS
SCINTILLATION COUNTERS
SODIUM IODIDES
SPIN
X RADIATION