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Current issue   Ukr. J. Phys. 2014, Vol. 59, N 1, p.5-8


Mitrokhovich N.F., Lashko A.P., Lashko T.N., Sidorenko L.P.

Institute for Nuclear Research, Nat. Acad. of Sci. of Ukraine
(47, Prosp. Nauky, Kyiv 03680, Ukraine; e-mail: anatolii.lashko@gmail.com)

On the Structure of Kπ = 3/2+, 362-keV Level in 165Ho

Section: Nuclei and nuclear reactions
Original Author's Text: Ukrainian

Abstract: High-precision measurements are carried out on a π √2 magnetic β-spectrometer for the relative intensities of the electron lines of internal conversion on the K- and L-shells of 165Ho nucleus, with the 362-keV γ-transition being used. The penetration parameter λ for the M2-component of this transition and the multipole mixing ratio δ(E3/M2) are determined for the first time. The value of E3-multipolarity admixture corresponds to the probability of radiative transition B(E3)(362 keV) = (46 ± 6) W.u., which testifies to its collective nature and a probable octupole deformation of 165Ho nucleus.

Key words: radioactivity, 165Dy, 165Ho, magnetic spectrometer, internal conversion, penetration parameter, multipole mixing ratio.