Decays of $sup 139$Xe and $sup 139$Cs

Thesis/Dissertation · Fri Feb 01 00:00:00 EDT 1974

OSTI ID:4340000

Lee, M A

Thesis. Sources of /sup 139/Xe and /sup 139/Cs were produced at the TRISTAN online isotope separator. With the aid of Ge(Li) singles and Ge(Li)Ge(Li) coincidence measurements, level schemes were constructed for /sup 139/Cs and /sup 139/Ba. In the /sup 139/Cs level scheme 193 of 220 obs erved transitions, constituting more than 98% of the gamma-ray intensity, were placed among 50 excited levels. In the /sup 139/Ba level scheme there are 82 excited levels, among which are placed 161 of 177 observed gamma-ray transitions. These transitions account for more than 98% of the observed gamma-ray intensity. The Q values for the beta decays of /sup 139/Xe and /sup 139/Cs were measured by using a Ge(Li) -plastic scintillator coincidence arrangement. For /sp 139/Xe the measured Q value is 4.88 plus or minus 0.06 MeV, and for /sup 139/Cs the measured Q value is 4.29 plus or minus 0.07 MeV. Spin and parity assignments were made with the help of calculated log-ft values and angular momentum transfer in stripping reactions, where available. An attempt was made to interpret some of the levels in terms of the shell model. (18 figures, 11 tables) (auth)

• Research Organization: Ames Lab., Ames, IA (United States)
• DOE Contract Number: W-7405-ENG-82
• NSA Number: NSA-29-028273
• OSTI ID: 4340000
• Report Number(s): IS-T-604
• Resource Relation: Other Information: Thesis. Orig. Receipt Date: 30-JUN-74
• Country of Publication: United States
• Language: English

Related Subjects

N68731* -Physics (Nuclear
Experimental)-Nuclear Properties & Reactions
90 <= A <= 149-Energy Levels & Transitions
N68721 -Physics (Nuclear
Experimental)-Nuclear Properties & Reactions
90 <= A <= 149-Radioactive Decay
BETA-MINUS DECAY- FT VALUE- GAMMA SPECTRA- Q- VALUE- XENON 139
BRANCHING RATIO
COINCIDENCE SPECTROMETRY BARIUM 139- ENERGY LEVELS- ENERGY-LEVEL TRANSITIONS- PARITY- SHELL MODELS- SPIN