Nuclear isovector valence-shell excitation of Hg202

Kern, R.; Stegmann, R.; Pietralla, N.; Rainovski, G.; Carpenter, M. P.; Janssens, R. V.  F.; Lettmann, M.; Möller, O.; Möller, T.; Stahl, C.; Werner, V.; Zhu, S.

doi:10.1103/PhysRevC.99.011303

Title: Nuclear isovector valence-shell excitation of ${}^{202}{Hg}$

Journal Article · 09 January 2019 · Physical Review C

DOI: https://doi.org/10.1103/PhysRevC.99.011303 · OSTI ID:1495382

Kern, R. ^[1]; Stegmann, R. ^[1]; Pietralla, N. ^[1]; Rainovski, G. ^[2]; Carpenter, M. P. ^[3]; Janssens, R. V. F. ^[4]; Lettmann, M. ^[1]; Möller, O. ^[1]; Möller, T. ^[1]; Stahl, C. ^[1]; Werner, V. ^[1]; Zhu, S. ^[3]

Technische Univ. Darmstadt, Darmstadt (Germany)
Univ. of Sofia St. Kliment Ohridski, Sofia (Bulgaria)
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States)

Excited states of ²⁰²Hg have been studied via the ¹²C(²⁰²Hg, ²⁰²Hg*) Coulomb excitation reaction at a beam energy of 890 MeV. The γ-ray transitions from the excited states of ²⁰²Hg were detected by the Gammasphere array. The intensities of the observed γ rays determined the relative populations of the excited states which were used to extract the absolute M1 and E2 transition strength distributions for excited 2⁺ states of ²⁰²Hg up to 2 MeV. The measured absolute B(M1;2⁺₇→2⁺₁) strength of 0.18(8)μ²_N indicates that the 2⁺₇ level of ²⁰²Hg is the main fragment of the proton-neutron mixed-symmetry 2⁺_1,ms state. As a result, the upper limits for the F-spin mixing matrix elements of ^202,204Hg are determined as well.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: Alexander von Humboldt Foundation; USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1495382

Journal Information:: Physical Review C, Journal Name: Physical Review C Journal Issue: 1 Vol. 99; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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