Mixing Ratio of the 440-keV Gamma Radiation in ²³Na

抄録

The angular distribution and the direction-polarization of the 440–keV gamma rays in ²³Na(p, p′γ)²³Na reaction have been measured at the 1.29–MeV resonance. For these measurements the following results were observed; for the angular distribution, W(θ)=1−(0.091±0.004)P₂ (cosθ) and for the polarization parameter, p=+0.69±0.02. From the observed results, the mixing ratio of the 440–keV gamma radiation was obtained as (E2/M1)^1⁄2=+0.045±0.015. This value agrees with the prediction from the collective model.