Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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N. F. Mitrokhovich<sup>1

1</sup>Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

Abstract: Based on performed specification of internal conversion coefficients (ICC) for basic γ-transitions in decay of ¹⁵³Gd and ¹⁶⁰Tb, the anomalies in ICC, conditioned by penetration effect were defined and studied. For γ70(M1+E2) and γ103(M1+E2) in decay of ¹⁵³Gd a penetration parameter in M1-component is measured, which is equal accordingly 0.8 ± 1.2 and 4.7 ± 0.4. The values δ are defined taking into account λ and are equal to 0.105 ± 0.008 and 0.117 ± 0.004. In decay of ¹⁶⁰Tb anomalies in ICC are defined for γ-transitions 299, 1178, 1272 keV with E1 multipolarity and definite penetration λ_i parameters. For γ299 λ₁ = -1.8 ± 1.3; for γ1178 λ₁ = 2 ± 0.9; for γ1272 λ₁ = 1 ± 0.5; λ₂ =17 ± 3; λ₃ = 3.8 ± 0.5.

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