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Resonance behavior of internal conversion coefficients at low γ-ray energy

Trzhaskovskaya, M. B.; Kibedi, Tibor; Nikulin, V. K.

Description

A resonance-like structure of internal conversion coefficients (ICCs) at low γ -ray energy ( <100 keV) is studied. Our calculations revealed new, previously unknown resonance minima in the energy dependence of ICCs for the ns shells at E2–E5 transitions. The resonances are the most defined for ICCs in light and medium elements with Z < 50. It is shown that ICCs may have up to four resonances for outer shells while it has been assumed so far that only one resonance exists. Well-pronounced...[Show more]

dc.contributor.authorTrzhaskovskaya, M. B.
dc.contributor.authorKibedi, Tibor
dc.contributor.authorNikulin, V. K.
dc.date.accessioned2015-08-11T04:12:42Z
dc.date.available2015-08-11T04:12:42Z
dc.identifier.issn0556-2813
dc.identifier.urihttp://hdl.handle.net/1885/14672
dc.description.abstractA resonance-like structure of internal conversion coefficients (ICCs) at low γ -ray energy ( <100 keV) is studied. Our calculations revealed new, previously unknown resonance minima in the energy dependence of ICCs for the ns shells at E2–E5 transitions. The resonances are the most defined for ICCs in light and medium elements with Z < 50. It is shown that ICCs may have up to four resonances for outer shells while it has been assumed so far that only one resonance exists. Well-pronounced resonances in ICCs at E1 transition were discovered for the ns shells with n > 2 as well as for the np shells with n > 3 and the nd shells with n > 4 of all elements up to superheavy ones. Simple expressions for approximate values of the E1 resonance energy were obtained which are of importance for determination of the resonance energy range where the interpolation of ICCs taken from tables or databases may give significant errors. The occurrence of resonances in ICCs is explained by vanishing conversion matrix elements under changes of sign. The peculiarities of the behavior of the matrix elements and electron wave functions at the resonance energy are considered. Available experimental ICCs for electric transitions with energies near the expected position of resonances satisfactory agree with our calculations.
dc.description.sponsorshipThis work was funded by Russian Foundation for Basic Research (Project No. 09-02-00352), which is gratefully acknowledged.
dc.format11 pages
dc.publisherAmerican Physical Society
dc.rights© 2010 The American Physical Society http://www.sherpa.ac.uk/romeo/issn/0556-2813/Author can archive pre-print (ie pre-refereeing), author can archive post-print (ie final draft post-refereeing), author can archive publisher's version/PDF. Author's personal website, employer's website or institutional repository. Author's post-print on open repository. Publisher's version/PDF may be used. Link to publisher version required. Publisher copyright and source must be acknowledged with citation. (Sherpa/Romeo as of 11/8/2015). http://journals.aps.org/authors/transfer-of-copyright-agreement The right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)’ web home page or employer’s website and to make copies of all or part of the Article, including the APS-prepared version without revision or modification, for the author(s)’ and/or the employer’s use for educational or research purposes. (Publisher's journal website as of 11/8/2015).
dc.sourcePhysical Review C
dc.subjectinternal conversion coefficients (ICCs)
dc.subjectγ -ray energy
dc.subjectresonance minima
dc.subjectE2–E5 transitions
dc.subjectns shells
dc.subjectE1 transition
dc.titleResonance behavior of internal conversion coefficients at low γ-ray energy
dc.typeJournal article
local.identifier.citationvolume81
dc.date.issued2010-02-26
local.publisher.urlhttp://www.aps.org/
local.type.statusPublished Version
local.contributor.affiliationKibedi, Tibor, Department of Nuclear Physics, CPMS, Research School of Physics and Engineering, The Australian National University
local.identifier.essn1089-490X
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage11
local.identifier.doi10.1103/PhysRevC.81.024326
CollectionsANU Research Publications

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