| Autor: |
S. W. Yates, D. Bandyopadhyay, N. Boukharouba, M. T. McEllistrem, V. Werner, J.L. Weil, N. Warr, C. Fransen |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Nuclear Physics A. 747:206-226 |
| ISSN: |
0375-9474 |
| DOI: |
10.1016/j.nuclphysa.2004.10.003 |
| Popis: |
The low-lying levels of 124Sn have been explored using the ( n , n ′ γ ) reaction to identify multiphonon quadrupole excitations. Yields of γ rays as a function of incident neutron energy, γ–γ coincidences, and γ-ray angular distributions have been measured. From the excitation functions and coincidence measurements, the level and decay schemes were determined with good confidence in the γ-ray placements. The angular distributions provide multipolarity information on the decay γ rays which lead to spin assignments for levels and also enable the determination of lifetimes or lifetime limits from Doppler shifts. A close-lying triplet of levels, representing the two-phonon multiplet, occurs near an additional 4+ level which mixes with the 4+ two-phonon excitation. A three-phonon quintet of levels has been found, including one new level, which decays almost exclusively to the two-phonon triplet. No other levels in the three-phonon energy region decay other than weakly to the two-phonon excitations; only one other level has observable decays to the two-phonon triplet. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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