Gamma-gamma and electron-gamma angular correlation studies in the decay of 75Se

摘要: Abstract The multipolarities of the 121 keV, 136 265 keV and 280 transitions in decay 75Se have been determined from γγ e−γ angular correlation measurements. use a Ge(Li) detector gave complete separation different γ-lines. Consequently, more reliable results could be obtained than previous NaI(Tl) measurements had given. We derive new data experiments for lines mixing parameters σ(265 )=−0.0425 ±0.0064, σ(280 )=−0.0480±0.026 . performed using Si(Li) as well magnetic-lens spectrometer detection conversion electrons. From these experiments, we obtain transitions, K-shell particle b 2 (121 )=−1.91±0.04, (136 )=−1.85 ±0.16 These values are good agreement with E1 multipolarity calculated by Biedenharn Rose.