Interplay of quasiparticle and phonon excitations in 181Hf observed through (n,γ) and (d,p) reactions

V. Bondarenko, J. Berzins, P. Prokofjevs, L. Simonova, T. Von Egidy, J. Honzátko, I. Tomandl, P. Alexa, H. F. Wirth, U. Köster, Y. Eisermann, A. Metz, G. Graw, R. Hertenberger, L. Rubacek

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19 Scopus citations

Abstract

Nuclear levels of 181 Hf were investigated in the range up to 3 MeV excitation energy by (n, γ) and (d, p) reactions. Over 170 levels and about 390 γ-transitions were established most of them for the first time. 25 rotational bands were identified. Comparison of the results of the two reactions yields information on the fine structure in the fragmentation of Nilsson strength. The states below 2 Me V with the most complete spectroscopic information were interpreted in terms of the Quasiparticle Phonon Model (QPM). Excitation energies, electromagnetic transition rates, γ-branchings and spectroscopic factors are discussed in connection with their possible structure.

Original languageEnglish
Pages (from-to)3-59
Number of pages57
JournalNuclear Physics, Section A
Volume709
Issue number1-4
DOIs
StatePublished - 21 Oct 2002

Keywords

  • E=thermal
  • Ge detectors
  • Measured Eγ-γγ-coin, binding energy. Hf(d,p), E=24 MeV
  • Measured particle spectra. Hf deduced levels, J, π, γ-branching ratios, spectroscopic factor . Quasiparticle phonon model calculation and comparions. Enriched targets
  • Nuclear reactions Hf(n,γ)
  • Q3D spectrograph

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