beta. -ray angular distribution from aligned /sup 12/B and /sup 12/N
The coefficients ..cap alpha../sub minus-or-plus/ in the alignment-correlation terms A..cap alpha../sub minus-or-plus/EP/sub 2/(costheta), in /sup 12/B and /sup 12/N decays have been determined; ..cap alpha../sub -/(/sup 12/B) =+(0.006 +- 0.018) %/MeV, and ..cap alpha../sub +/(/sup 12/N) =-(0.273 +- 0.041) %/MeV. The sign of ..cap alpha../sub +/(/sup 12/N) was determined for the first time, by use of an NMR method and measurements on ..beta..-..gamma.. correlation in aligned /sup 12/N. The (..cap alpha../sub -/-..cap alpha../sub +/) result is consistent with strong conservation of vector currents without second-class currents and the (..cap alpha../sub -/+..cap alpha../sub +/) result gives unique information on the time component of the axial-vector current.
- Research Organization:
- Laboratory of Nuclear Studies and Department of Physics, Faculty of Science, Osaka University, Toyonaka, Osaka 560, Japan
- OSTI ID:
- 5907836
- Journal Information:
- Phys. Rev. Lett.; (United States), Vol. 43:15
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BORON 12
BETA-MINUS DECAY
NITROGEN 12
BETA-PLUS DECAY
ALIGNMENT
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
AXIAL-VECTOR CURRENTS
IMPULSE APPROXIMATION
NUCLEAR MAGNETIC RESONANCE
SECOND-CLASS CURRENTS
ALGEBRAIC CURRENTS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON ISOTOPES
CORRELATIONS
CURRENTS
DECAY
DISTRIBUTION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
NITROGEN ISOTOPES
NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
RESONANCE
SECONDS LIVING RADIOISOTOPES
651322* - Nuclear Properties & Reactions
A=6-19
Experimental- Radioactive Decay- (-1987)