Abstract
An analysis of the entire body of data on the intensities of two-step gamma cascades studied in thermal-neutron capture for more than 50 nuclei from the range 27 ≤ A ≤ 199 suggests that such processes should be described in terms of model concepts that are much more involved than those currently adopted by experimentalists. According to the results of this analysis, models of relevant parameters, such as the density of excited levels and radiative strength functions for dipole gamma transitions, should take into account more explicitly the coexistence and interaction of quasiparticle and phonon interactions. A direct inclusion of the idea that a second-order phase transition occurs and affects not only level densities but also radiative strength functions for dipole transitions may prove to be necessary. These conclusions concern primarily the excitation-energy region below a value of about 0.5B n .
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Translated from Yadernaya Fizika, Vol. 68, No. 9, 2005, pp. 1568–1582.
Original Russian Text Copyright © 2005 by Sukhovoj, Khitrov, Chol.
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Sukhovoj, A.M., Khitrov, V.A. & Chol, L. Experimental arguments in favor of refining model ideas of the cascade gamma decay of a compound state of a complex nucleus. Phys. Atom. Nuclei 68, 1510–1524 (2005). https://doi.org/10.1134/1.2053334
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DOI: https://doi.org/10.1134/1.2053334