Use of the (γ,γ′) reaction for studying the energy levels of 75As

R. Moreh, O. Shahal

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Elastic and inelastic nuclear resonant scattering of monochromatic photons from 75As have been studied using a 47-cc Ge (Li) detector. The γ source was provided by thermal-neutron capture in iron. The energy of the resonance level in 75As was found to be 7.646 MeV. Assuming the high-energy lines to be primary transitions deexciting the resonance level, 25 energy levels were found from the ground state up to 2.6 MeV, seven of which may be identified with recently reported levels. By measuring the angular distribution of the scattered radiation, the spin of the scattering level was determined to be 1/2 and the spins of 14 low-lying levels were thus found to be either 1/2 or 3/2. The total radiative width of the resonance level was determined and was found to be Γ=0.36±0.10 eV and Γ0/Γ=0.11. The 75As levels are compared with the predictions of the Coriolis coupling model.

Original languageEnglish
Pages (from-to)1765-1770
Number of pages6
JournalPhysical Review
Issue number4
StatePublished - 1 Dec 1969
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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