An improvement in the value of the energy of the first excited state in {sup 229}Th [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 87 pages : digital, PDF file
- Additional Creators:
- United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- It has been known for many years that the first excited state of ²²⁹Th lies close to the ground state. Originally this energy was given as < 0.1 keV; later, the authors reported a value of −1 ± 4 eV. Since the existence of a nuclear state at this very low energy is of considerable interest, measurements of its energy, half-life and modes of excitation and deexcitation are important. In an attempt to improve the level energy, the authors have measured over 175 γ-ray spectra with several combinations of radionuclides. In comparison with their earlier study, they have considered more γ rays in ²²⁹Th, used more well-measured reference lines, used more detectors, used detectors with better low-energy resolution, more closely matched peak count rates, and specifically considered certain systematic errors. From this large set of measurements they have deduced a value of 3.5 ± 1.0 eV for the energy of this level.
- Report Numbers:
- E 1.99:egg-nrp--10693
egg-nrp--10693 - Subject(s):
- Other Subject(s):
- Note:
- Published through SciTech Connect.
04/01/1993.
"egg-nrp--10693"
"DE93016594"
Reich, C.W.; Helmer, R.G.
EG and G Idaho, Inc., Idaho Falls, ID (United States) - Type of Report and Period Covered Note:
- Topical; 04/01/1993 - 04/01/1993
- Funding Information:
- AC07-76ID01570
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