Precise measurement of αK and αT for the 39.8-keV E3 transition in Rh103 : Test of internal-conversion theory

Nica, N.; Hardy, J. C.; Iacob, V. E.; Horvat, V.; Park, H. I.; Werke, T. A.; Glennon, K. J.; Folden, III, C. M.; Sabla, V. I.; Bryant, J. B.; James, X. K.; Trzhaskovskaya, M. B.

doi:10.1103/physrevc.98.054321

Title: Precise measurement of $α_{K}$ and $α_{T}$ for the 39.8-keV $E 3$ transition in ${}^{103}{Rh}$ : Test of internal-conversion theory

Journal Article · Wed Nov 28 00:00:00 EST 2018 · Physical Review C

DOI:https://doi.org/10.1103/physrevc.98.054321· OSTI ID:1614591

Nica, N. ^[1]; Hardy, J. C. ^[1]; Iacob, V. E. ^[1]; Horvat, V. ^[1]; Park, H. I. ^[1]; Werke, T. A. ^[1]; Glennon, K. J. ^[1]; Folden, III, C. M. ^[1]; Sabla, V. I. ^[2]; Bryant, J. B. ^[3]; James, X. K. ^[4]; Trzhaskovskaya, M. B. ^[5]

Texas A & M Univ., College Station, TX (United States)
Texas A & M Univ., College Station, TX (United States); Middlebury College, Middlebury, VT (United States)
Texas A & M Univ., College Station, TX (United States); Univ. of Central Arkansas, Conway, AR (United States)
Texas A & M Univ., College Station, TX (United States); Univ. of Wisconsin, La Crosse, WI (United States)
Petersburg Nuclear Physics Inst., Gatchina (Russia)

Neutron-activated sources of ¹⁰³Ru and ¹⁰³Pd both share the isomeric first-excited state in ¹⁰³Rh as a daughter product. From independent measurements of both decays, we have measured the K shell and total internal-conversion coefficients, α_K and α_T, for the 39.8-keV E3 transition, which de-excites that state in ¹⁰³Rh, to be 141.1(23) and 1428(13), respectively. When compared with Dirac-Fock calculations, our new results disagree with the version of the theory that ignores the K-shell atomic vacancy, which is consistent with our conclusion drawn from a series of measurements on high multipolarity transitions in nuclei with higher Z. Calculations that include the atomic vacancy indicate that the transition actually has a small M4 component with mixing ratio δ = 0.023(5).

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Research Organization:: Texas A & M Univ., College Station, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG03-93ER40773

OSTI ID:: 1614591

Alternate ID(s):: OSTI ID: 1483723

Journal Information:: Physical Review C, Vol. 98, Issue 5; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (32)

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Title: Precise measurement of α K and α T for the 39.8-keV E 3 transition in Rh 103 : Test of internal-conversion theory

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Title: Precise measurement of $α_{K}$ and $α_{T}$ for the 39.8-keV $E 3$ transition in ${}^{103}{Rh}$ : Test of internal-conversion theory