Decay of /sup 128/Cs

Journal Article · Fri Apr 01 04:00:00 EST 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.15.1453· OSTI ID:7322355

Helmer, R G; Reich, C W; Gehrke, R J; Greenwood, R C; Anderl, R A

Samples of /sup 128/Cs(3.9 min) in equilibrium with its parent /sup 128/Ba(2.4 day) have been produced by approx.800-MeV proton-induced spallation in praseodymium metal foils. Chemical purification and isotope separation have been performed to produce pure samples. Measurements of ..gamma..-ray singles and ..gamma..-..gamma.. coincidence spectra have been made. A total of 66 ..gamma.. rays between 442 and 3104 keV are assigned to the decay of /sup 128/Cs, 57 of which have been placed in a proposed level scheme for /sup 128/Xe involving 22 established and 3 tentative excited states. Absolute ..gamma..-ray intensities have been computed based on the positron and x-ray intensities. Spin and parity assignments are proposed based on the logft values and the existence of ..gamma.. rays depopulating the states. The first excited 0/sup +/ state is found to occur at 1582 keV. Evidence is presented which suggests that it is of predominantly ''three-phonon'' character, in agreement with some theoretical predictions for transitional nuclei in this mass region.

• Research Organization: Idaho National Engineering Laboratory, EG G Idaho, Inc., Idaho Falls, Idaho
• OSTI ID: 7322355
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 15:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651722* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Radioactive Decay-- (-1987)
651723 -- Nuclear Properties & Reactions
A=90-149
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
BARIUM 128
BARIUM ISOTOPES
BARYON REACTIONS
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
CESIUM 128
CESIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FT VALUE
GAMMA SPECTRA
HADRON REACTIONS
HALF-LIFE
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPE SEPARATION
ISOTOPES
LEPTONIC DECAY
METALS
MEV RANGE
MEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-ODD NUCLEI
PARITY
PARTICLE DECAY
PARTICLE PROPERTIES
PRASEODYMIUM
PROTON REACTIONS
RADIOISOTOPES
RARE EARTHS
SEPARATION PROCESSES
SPALLATION
SPECTRA
SPIN
STABLE ISOTOPES
WEAK INTERACTIONS
WEAK PARTICLE DECAY
XENON 128
XENON ISOTOPES