Electric monopole component in the 2+' → 2+ transition in 192Pt |
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Authors: | NA Voinova DM Kaminker YuV Sergeenkov |
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Institution: | Leningrad Institute of Nuclear Physics, Academy of Sciences of the USSR USSR |
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Abstract: | Angular correlation measurements of K- and L-conversion electrons following the decay 192Ir → 192Pt have been made using a spectrometer with Ge(Li) and Si (Li) detectors. Absolute and relative internal conversion coefficients of transitions in 192Pt were measured, using an ICC and prism β-spectrometers, to ≈ 2 % and values of δγ determined from the relative ICC. The experimental values measured in the study, A22(K296γ316) = 0.138 ± 0.010, A22(L296γ316) = 0.125 ± 0.013, αK(296) = 0.0711 ± 0.0011, K/LIII = 9.65 ± 0.13. With δγ = + 5.4 ± 0.2, were employed for determining the E0/E2 amplitude ratios of conversion transitions, q(E0/E2), and the penetration parameter λ of the Ml component for the 2+' → 2+ (296 keV) transition in 192Pt. The angular correlation measurements of L-conversion electrons enabled the elimination of one of two ranges of values of q and λ usually obtained. For the first time in our work, analysis of the eLγ angular correlation for the determination of the E0 component in the transition was carried out. As a result, q = +0.04 ± 0.05 with λ = ?4.5 ± 3.5 was obtained for the 296 keV transition. In this case, ρ(E0) = 0.004 ± 0.005 agrees with ρ(E0) = +0.006 determined theoretically by Kumar and Baranger for the 2+' → 2+ transition |
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Keywords: | Radioactivity |
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