beta. decay measurements of neutron deficient cesium isotopes

Thesis/Dissertation · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6443151

Parry, R F

..beta.. decay endpoint energy measurements of the neutron deficient cesium isotopes were done using an energy spectrum shape fitting technique. This was a departure from the typical method of endpoint energy analysis, the Fermi-Kurie plot. A discussion of the shape fitting procedure and its improved features are discussed. These ..beta.. endpoint measurements have led to total decay energies (Q/sub EC) of the neutron deficient /sup 119-123/Cs isotopes. The total decay energies of /sup 122m/Cs (Q/sub EC/ = 6.95 +/- 0.25 MeV) and /sup 119/Cs (Q/sub EC/ = 6.26 +/- 0.29 MeV) were new measurements. The total decay energies of /sup 123/Cs (Q/sub EC/ = 4.05 +/- 0.18 MeV), /sup 122g/Cs (Q/sub EC/ = 7.05 +/- 0.18 MeV),/sup 121/Cs (Q/sub EC/ = 5.21 +/- 0.22 MeV), and /sup 120/Cs (Q/sub EC/ = 7.38 +/- 0.23 MeV) were measurements with significantly improved uncertainties as compared to the literature. Further, a combination of the energy levels derived from previous literature ..gamma..-..gamma.. coincident measurements and the experimental ..beta..-coincident ..gamma.. decay energies has supported an improved level scheme for /sup 121/Xe and the proposal of three new energy levels in /sup 119/Xe. Comparison of the experimental cesium mass excesses with both the literature and theoretical predicted values showed general agreement except for /sup 120/Cs. This isotope displayed a deviation of approx.800 keV in both comparisons with the experimental value. Possible explanations for this deviation are discussed.

• Research Organization: California Univ., Berkeley (USA)
• OSTI ID: 6443151
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CESIUM 119
BETA DECAY
CESIUM 120
CESIUM 121
CESIUM 122
CESIUM 123
XENON 119
ENERGY LEVELS
XENON 121
EXPERIMENTAL DATA
Q-VALUE
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
DATA
DECAY
ENERGY
EVEN-ODD NUCLEI
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
XENON ISOTOPES
651722* - Nuclear Properties & Reactions
A=90-149
Experimental- Radioactive Decay- (-1987)
651723 - Nuclear Properties & Reactions
A=90-149
Experimental- Energy Levels & Transitions- (-1987)