The beta decay asymmetry parameter of sup 35 Ar

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5176830

Garnett, J D

The beta decay asymmetry parameter for {sup 35}Ar {yields} {sup 35}Cl + e{sup +} + v{sub e} has been remeasured in order to resolve a long standing puzzle. Previous asymmetry measurements, when combined with the comparative half-life, yield a value for the vector coupling constant, G{sub v}, that is in serious disagreement with the accepted value. The author produced polarized {sup 35}Ar by a (p,n) reaction on {sup 35}Cl using the polarized proton beam provided by Lawrence Berkeley Laboratory's 88-Inch Cyclotron. The polarization of the {sup 35}Ar was determined by measuring the asymmetry of the positrons produced in {sup 35}Ar decay to the first excited state in {sup 35}Cl (branching ratio = 1.3%) in coincidence with a 1219.4 keV gamma ray. The result, A{sub 0} = 0.49 {plus minus} 0.10, combined with the comparative half-life yields a value for G{sub v} in agreement with the accepted value.

• Research Organization: California Univ., Berkeley, CA (USA)
• OSTI ID: 5176830
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ARGON 35
ARGON ISOTOPES
ASYMMETRY
BEAMS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BRANCHING RATIO
CHLORINE 35
CHLORINE ISOTOPES
COUPLING CONSTANTS
DECAY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
FERMIONS
GAMMA RADIATION
HALF-LIFE
IONIZING RADIATIONS
ISOTOPES
LEPTONS
LIGHT NUCLEI
NUCLEAR DECAY
NUCLEI
NUCLEON BEAMS
ODD-EVEN NUCLEI
PARTICLE BEAMS
POLARIZATION
POLARIZED BEAMS
POSITRONS
PROTON BEAMS
RADIATIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES