Unusual neutron-capture gamma-ray cascade in 124Te: A fingerprint of octupole-coupled multiphonon states

R. Georgii, P. von Neumann-Cosel, T. von Egidy, M. Grinberg, V. A. Khitrov, J. Ott, P. Prokofjevs, A. Richter, W. Schauer, C. Schlegel, R. Schulz, L. J. Simonova, Ch Stoyanov, A. M. Sukhovoj, A. V. Vojnov

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Abstract

The properties of the special levels in 124Te that are strongly populated by thermal neutron-capture γ-rays have been determined with 123Te(n,γ) and 124Te(γ,γ′) experiments. The unusual decay pattern can be consistently explained within the quasiparticle-phonon model assuming a three-phonon |21 + ⊗ 21 + ⊗ 31 -; 2-〉 configuration of the upper intermediate level at 3.101 MeV which exclusively decays to a close-lying two-phonon |21 + ⊗ 31 f-; 1f-f> state at 2.747 MeV. The (γ,γf') reaction strongly excites the latter and also indicates the 1f- member of the three-phonon 21 + ⊗ 21 + ⊗ 31 f- septuplet at 3.091 MeV.

Original languageEnglish
Pages (from-to)82-86
Number of pages5
JournalPhysics Letters B
Volume351
Issue number1-3
DOIs
StatePublished - 25 May 1995

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