FT VALUE OF O$sup 14$ AND THE UNIVERSAL FERMI INTERACTION

Journal Article · Sat Oct 01 00:00:00 EDT 1960 · Phys. Rev. Letters

DOI:https://doi.org/10.1103/PhysRevLett.5.323· OSTI ID:4137033

Bardin, R K; Barnes, C A; Fowler, W A; Seeger, P A

The experimentally observed near equality of the coupling constants in beta and muon decays has suggested that all the "weak interactions" proceed by a universal Fermi interaction. It is of interest to establish the degree to which the coupling constants G/sub v/ for the vector beta -decay and G/sub mu / for the muon decay are equal. The precision with which G/sub mu / is known has improved considerably due to more accurate measurements of the muon mean lifetime and mass. To determine G/sub v/ more accurately the ft value was measured for the 0/sup +/ yields 0/sup +/ beta transition in O/sup 14/( beta /sup +/ nu )N/ sup 14*/. After a total correction of +0.289% for nuclear electromagnetic form factors, competition from K capture, and electron screening, the ft value is 3069 plus or minus 13 sec. The corrected ft value yields G/sub v/ = (1.416 plus or minus 0.003) x 10/sup -49/ erg cm/sup 3/. If this value is adopt ed for G/sub mu /, then, without radiative corrections, the calculated mean lifetime of the muon becomes 2.250 plus or minus 0.610 mu sec, which is 1.8 plus or minus 0.5% greater than the mean of the observed lifetime, 2.210 plus or minus 0.003 mu sec. (B.O.G.)

• Research Organization: California Inst. of Tech., Pasadena
• NSA Number: NSA-14-026295
• OSTI ID: 4137033
• Journal Information: Phys. Rev. Letters, Journal Name: Phys. Rev. Letters Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BETA DECAY
CAPTURE
DECAY
ELECTROMAGNETISM
ELECTRONS
ERRORS
FERMI INTERACTION
FORM FACTOR
INTERACTIONS
LIFETIME
MASS
MEASURED VALUES
MUONS
NUCLEAR THEORY
NUMERICALS
OXYGEN 14
PARITY
PHYSICS
POSITRONS
SHIELDING
SPIN
TRANSIENTS
VECTORS