Gamma-Gamma Angular Correlations in Cs^<131>
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概要
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The γ-γ angular correlation has been remeasured for the 924-124 keV cascade in Cs^<131>, since the correlation function obtained in the previous experiment were found to contain error due to Compton scattered gamma rays. In the present experiment these scattered gamma rays have been made to be negligibly small by use of lead collimators and absorbers. The revised correlation function has been obtained to be W_<924-124>(θ)= 1-(0.056±0.014) P_2(cosθ)-(0.026±0.028) P_4(cosθ), where the errors are statistical ones only. The possibility of spin assignment of 1/2 for the 124keV level is probab]y excluded. The γ-γ angular correlation for the 832-216keV cascade has been also measured with the same geometry. The corre]ation function is obtained to be W_<832-216>(θ) =1 -(0.185 ±0.025)P_2(cosθ)+(0.049±0.029)P_4(cosθ). The E2/M1 mixing ratios for the 832 keV and 924 keV transitions are discussed.
- 社団法人日本物理学会の論文
- 1965-07-05
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