Phys. Rev. C 63, 044313 (2001) [7 pages]γ-ray strength function and pygmy resonance in rare earth nucleiReceived 26 September 2000; published 14 March 2001 The γ-ray strength function for γ energies in the 1–7 MeV region has been measured for 161,162Dy and 171,172Yb using the (3He,αγ) reaction. Various models are tested against the observed γ-ray strength functions. The best description is based on the Kadmenskiĭ, Markushev, and Furman E1 model with constant temperature and the Lorentzian M1 model. A γ-ray bump observed at Eγ∼3 MeV is interpreted as the so-called pygmy resonance, which has also been observed previously in (n,γ) experiments. The parameters for this resonance have been determined and compared to the available systematics. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.63.044313
DOI:
10.1103/PhysRevC.63.044313
PACS:
24.30.Cz, 24.30.Gd, 25.55.Hp, 27.70.+q
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