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Is it possible to induce a fast de-excitation of the 16/sup +/ isomeric state in /sup 178/Hf.

Author
Hsu, H. H.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Doolen, G. D., Mack, J. M., and Talbert, W. L.

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Summary
The 16/sup +/ level of /sup 178/Hf at 2.446 MeV is interpreted as a four-quasi-particel state with K = 16. It decays mainly to a 13/sup -/ level at 2.433 MeV, a member of rotational band built on a two-quasi-particle 8/sup -/ state (K = 8) at 1.1474 MeV. The 13-keV transition is > 99% E3 character and occurs predominantly through internal conversion. The five-times K-forbidden E3 transition has a large hindrance factor; the half-life of the 16/sup +/ state is known to be 31 years. If this isomeric nucleus can be induced to release its energy quickly, the resulting energy release would be 6 orders of magnitude more energetic per reaction than that for existing high explosives. The following mechanisms to enhance de-excitation of this isomer are presented for discussion: (1) inelastic scattering of high-energy neutrons; (2) inelastic scattering of a high-energy, high-intensity electron beam; and (3) interaction with intense photon fields (rf, laser, x ray, ..gamma.. ray). Experiments to explore such de-excitation mechanisms are discussed. 12 refs., 4 figs., 1 tab.
Report Numbers
DE86002412; LA-UR-85-3664; CONF-8510137-1
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: W-7405-ENG-36
OSTI Identifier 6334753
Research organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States).
View MARC record | catkey: 47359697