The level structure of 184W FROM THE β- decay of 184Ta

S. W. Yates, P. J. Daly, Noah R. Johnson, N. K. Aras

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11 Scopus citations


Levels of 184W populated in the decay of 8.7 h 184Ta have been studied by a variety of experimental techniques. As a result of β and γ-ray energy and intensity determinations and extensive β-γ and γ-γ coincidence measurements, a detailed 184Ta decay scheme accommodating more than 99.5% of the decay intensity has been established. Intense β-ray groups of end-point energies 1165±26 and 1123±26 keV populate levels in 184W at 1699 and 1746 keV, which de-excite predominantly to the 8.3 μs isomeric level at 1285 keV, recently identified as the 1 2-[510]ν- 11 2+ [615]ν Kπ = 5- band origin. The 1699 keV level also de-excites to members of a 1 2-[510]ν- 7 2 [503]ν Kπ = 3+ band based at 1425 keV. New information about the properties of the γ-vibrational and K = 2 octupole bands in 184W is presented and the possible configurations of the levels directly populated in the β- decay are discussed. The configuration 7 2+[404]π - 3 2- [512]ν Kπ = 5- is indicated for the 184Ta ground state.

Original languageEnglish
Pages (from-to)33-52
Number of pages20
JournalNuclear Physics, Section A
Issue number1
StatePublished - Apr 2 1973

Bibliographical note

Funding Information:
During the past ten years, the level structure of lS4W has been studied by a wide variety of experimental techniques, and the location and properties of the lower members of the ground state rotational band and of the ?-vibrational band have been firmly established 1). Detailed studies 2-8) of the decay of the lS4Re isomers have located several additional 184W levels which have not yet been well characterized. A K ~ = 0 + band which is weakly populated following the lsg~Re decay was first identified in neutron capture 9,10) and fast neutron scattering experiments11). Earlier investigations 4,12, la) of the decays of lSgTa and lsgmRe have shown that the ~84W levels directly populated in these decays de-excite predominantly to a high-lying isomeric level. In a recent study, Glatz et al. 7) located the isomeric level at * Work supported by the US Atomic F nergy Commission. ** Permanent address: Department of Chemistry, Middle East Technical University, Ankara, Turkey. *** Research sponsored by the US Atomic Energy Commission under contract with Union Carbide Corporation,


  • Radioactivity

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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