Beta-decay asymmetries in polarized12B and12N and theG-parity non-conservation |
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Authors: | Kenzo Sugimoto |
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Institution: | (1) Department of Physics and Laboratory of Nuclear Studies, Faculty of Science, Osaka University, Toyonaka Osaka 560, Japan |
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Abstract: | The decay asymmetries (A) in polarized12B and12N have been measured as a function of -ray energies (E). The coefficients ± inA = ±P(p/E) (1+±
E) have been determined to be –(12B) =+(0.31±0.06)%/MeV and +(12N) = –(0.21±0.07)%/MeV. The experimental value, ––+=(0.52±0.09)%/MeV, is larger than the prediction according to conservation of vector current which includes no second-class current, ––+
CVC0.27%/MeV, and indicates the existence of the second-class induced-tensor current.This work has been done in collaboration with I. Tanihata and J. Göring. |
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