New, low-energy excitations in 107Mo and 109Mo

Urban, W.; Rzaca-Urban, T.; Wisniewski, J.; Kurpeta, J; Plochocki, A.; Greene, J. P.; Smith, A. G.; Simpson, G. S.

doi:10.1103/physrevc.102.024318

Title: New, low-energy excitations in ¹⁰⁷Mo and ¹⁰⁹Mo

Journal Article · Fri Aug 14 00:00:00 EDT 2020 · Physical Review C

DOI:https://doi.org/10.1103/physrevc.102.024318· OSTI ID:1661665

Urban, W. ^[1];

^[1]; Wisniewski, J. ^[1]; Kurpeta, J ^[1]; Plochocki, A. ^[1]; Greene, J. P. ^[2]; Smith, A. G. ^[3]; Simpson, G. S. ^[3]

Univ. of Warsaw (Poland)
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Manchester (United Kingdom)

New ground-state level with spin-parity 1/2⁺ is established in ¹⁰⁹Mo, 69.8 keV below the previously reported 5/2(+) ground state in this nucleus, based on precise spectroscopy measurements of gamma radiation following spontaneous fission of ²⁴⁸Cm performed using the Eurogam2 array of anti-Compton spectrometers. Analogous measurement of gamma radiation following spontaneous fission of ²⁵²Cf, performed using the Gammasphere array, confirms the new 1/2⁺ ground state of ¹⁰⁷Mo, proposed recently and establishes the isomeric character of the 5/2⁺ first excited state in ¹⁰⁷Mo. Two beta-decaying isomers are suggested in ¹¹¹Mo nucleus based on regular energy systematics, supporting previous predictions. Low-energy excitations in Mo isotopes are interpreted and compared to calculations reported in the literature. The results suggest shape transition from prolate to oblate deformation at N >= 67.

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

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

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1661665

Journal Information:: Physical Review C, Vol. 102, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (34)

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