Perturbed-angular-correlation measurement of a Fermi to Gamow-Teller mixing ratio in the. beta. decay of /sup 19/O

Journal Article · Wed Nov 01 04:00:00 EST 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.2333· OSTI ID:6645528

Perlman, D M; Grodzins, L; Thorn, C E

Time-differential ..beta..-..gamma.. angular correlations perturbed by the nuclear quadrupole interaction in a zinc single crystal were used to extract a value of y = + 0.030 +- 0.015 for the ratio C/sub V/M/sub F//C/sub A/M/sub GT/ of Fermi to Gamow-Teller matrix elements in the allowed ..beta../sup -/ decay from the 5/2/sup +/ /sup 19/O ground state to the 5/2/sup +/, 197 keV state in /sup 19/F. This leads to a figure of M/sub F/ = (4.7 +- 2.4) x 10/sup -3/ for the isospin-forbidden Fermi matrix element. Other parameters which can be derived from this number are ..cap alpha.. = (2.7 +- 1.4) x 10/sup -3/ for the admixture of the analog of the /sup 19/O ground state in the /sup 19/F excited state and vertical-barH/sub CD/vertical-bar = 20 +- 10 keV for the effective charge-dependent matrix element. A value of ..omega../sub 0/ = + 8.5 +- 0.5 ..mu..sec/sup -1/ was determined for the nuclear quadrupole interaction of the /sup 19/F excited state in a zinc single crystal. The calibration provided by the pure Gamow-Teller decay to the 3/2/sup +/ 1.554 keV state in /sup 19/F was used to remove effects of the implantation process, and data analysis was performed with a model which incorporated the effects of ..beta..'s backscattered by the thick crystal.

• Research Organization: Laboratory for Nuclear Science and Department of Physics, M.I.T., Cambridge, Massachusetts 02139
• OSTI ID: 6645528
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651322 -- Nuclear Properties & Reactions
A=6-19
Experimental-- Radioactive Decay-- (-1987)
651323* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
CORRELATIONS
DECAY
ELEMENTS
ENERGY LEVELS
EVEN-ODD NUCLEI
FERMI INTERACTIONS
FLUORINE 19
FLUORINE ISOTOPES
GAMOW-TELLER RULES
INTERACTIONS
ISOSPIN
ISOTOPES
LEPTONIC DECAY
LIGHT NUCLEI
MATRIX ELEMENTS
METALS
MIXING RATIO
NUCLEI
ODD-EVEN NUCLEI
OXYGEN 19
OXYGEN ISOTOPES
PARTICLE DECAY
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
WEAK INTERACTIONS
WEAK PARTICLE DECAY
ZINC