Multipole mixing Ratios of Gamma Rays for high spin states in ( ¹⁸² Pt) Using Constant Statistical Tensor Method (CSTM)

This study used the constant statistical tensor (CST) method to calculate mixing ratios (δ) for high-spin excited states in 182 Pt nuclide in the following heavy ion reactions: 170 Yb ( 16 O,4n) 182 Pt, 162 Dy ( 24 Mg,4n) 182 Pt and 163 Dy ( 24 Mg,5n) 182 Pt. To determine the multipole mixing ratios (δ) for all γ-transitions in the 182 Pt nuclide, the statistical tensor ρ2 (J i ) must be calculated for pure transitions or transitions considered to be pure. These ρ2 (J i ) values are considered constant for all levels with the same (Ji), and can thus be used to calculate the multipole mixing ratios of γ-transitions for both pure and mixed transitions. The obtained multipole mixing ratios show that most values calculated for pure transitions are very small, confirming that these transitions represent the pure electrical transition (E1) or (E2). However, the multipole mixing ratios calculated for the mixed transition were not the same as those obtained experimentally. Although the angular distributions for some γ-transitions had previously been experimentally obtained, their δ-values had not been previously calculated for all γ-transitions. The δ-values of these γ-transitions have been calculated in this work. The results for the mixing ratios values for γ-transitions in this study confirm the possibility of using the CST method as a tool for the calculation of the δ-values when it cannot be obtained experimentally.