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, Russian   Periodicity: 4 times per year   Open access peer reviewed journal

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Abstract: Correlation study of the "shake-off" electron (as accompanying particle) with positron (as a main particle) has been performed for ¹⁵²Eu decay with installation to measure double, triple, fourth γ-quanta coincidences with β^±-particles, electrons and with low energy electrons, including e_o-electrons of the secondary electron emission. Correlation ϒ = (4π/P)dp/dΩ of "shake-off" electron with positron was measured regarding correlation of "shake-off" electron with β^--particle on the basis of the measurements of γ, γβ, γ(е_o+β)-, γβе_o- and γβγ₅₁₁^-, γβγ₅₁₁е_o-spectra. It was established that accompanying "shake-off" electron is strongly correlated forward with the main particle (β^±-particle) and correlation of ϒ motion with positron is 1.6 times greater than correlation motion with β^--particle and is equal to 5.2(20) at the measurement in ¹⁵²Eu decay. Possible qualitative mechanism of strong correlation motion of the accompanying particle with the main particle in β-decay processes and internal conversion, caused by current components of the direct interaction of particles, is discussed.

Keywords: β^±-decays, conversion electron, Auger electron, "shake-off" electron, ¹⁵²Eu.

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