Low-energy excited states in 128I produced by the (p, n) reaction

J. Burde, V. Richter, I. Labaton, A. Moalem

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Gamma spectra produced in the 128Te(p, n)128I reaction were taken as a function of proton bombarding energy Ep = 2.8 MeV to 5.0 MeV. A level scheme composed of 41 excited states was constructed on the basis of singles γ-spectra and extensive γ-γ coincidence measurements. The coincidence measurements were carried out utilizing a three-parameter Ge(Li)-Ge(Li)-timing system. Upper limits were placed on the lifetime of six levels. The modes of de-excitation of many levels as deduced in the present investigation are significantly different from the results obtained in the (n, γ) reaction. Angular distribution measurements combined with the results from the coincidence counting rates and the population strength of the states by primary transitions in the (n, γ) reaction enabled some spin and parity assignments and tentative assignments for many other levels. The ground state and nine positive-parity states were described in terms of admixed twoquasiparticle multiplets.

Original languageEnglish
Pages (from-to)238-256
Number of pages19
JournalNuclear Physics A
Issue number2
StatePublished - 12 Jan 1981


  • Nuclear Reactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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