Manifestations of Intermediate Structure in the gamma Decay of Non-Analog Resonances

News, 11 June 2024

We offer to your attention a preprint “Manifestations of the Intermediate Structure in the gamma Decay of Non-Analog Resonances” JINR Publishing Department. The author is Igor Izosimov, the leading researcher of the Flerov Laboratory of Nuclear Reactions at JINR.

The angular distributions of γ radiation during the decay of non-analog resonances in reactions 58,60,62Ni(p, γ)59,61,63Cu are analyzed. The coefficients of decomposition of angular distributions by Legendre polynomials, the correlation of widths and the distribution function of a mixture of multipoles δ for M1 + E2 γ decays of non-analog resonances are analyzed. Unambiguous evidence of the non-statistical nature of the studied resonances has been obtained. A possible reason for the manifestation of non-statistical effects in (p, γ) reactions is discussed.

The manifestation of the gross structure, intermediate structure and fine structure in the excitation function of resonances in the (p, γ) reaction

The study of the decay characteristics of nuclear states and resonances at excitation energies exceeding 3–5 MeV in medium and heavy nuclei plays an important role in understanding the structure of atomic nuclei.

The investigation has been performed at the Flerov Laboratory of Nuclear Reactions, JINR.