Uncertainties and understanding of experimental and theoretical results regarding reactions forming heavy and superheavy nuclei

Abstract

Experimental and theoretical results of the $P_{\mathrm{CN}}$ fusion probability of reactants in the entrance channel and the $W_{\mathrm{sur}}$ survival probability against fission at deexcitation of the compound nucleus formed in heavy-ion collisions are discussed. The theoretical results for a set of nuclear reactions leading to formation of compound nuclei (CNs) with the charge number $Z=102\text{–}122$ reveal a strong sensitivity of $P_{\mathrm{CN}}$ to the characteristics of colliding nuclei in the entrance channel, dynamics of the reaction mechanism, and excitation energy of the system. We discuss the validity of assumptions and procedures for analysis of experimental data, and also the limits of validity of theoretical results obtained by the use of phenomenological models. The comparison of results obtained in many investigated reactions reveals serious limits of validity of the data analysis and calculation procedures.

arXiv comment23 pages, 22 figurea, 1 table, in press in Nucl. Phys. A

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Cited by in corpus (7)

• Analysis of the fusion mechanism in synthesis superheavy element 119 via ${}^{54}$Cr+${}^{243}$Am reaction
• Optimal colliding energy for the synthesis of superheavy element $Z$=119
• Production of super-heavy nuclei in cold fusion reactions
• Effects of entrance channels on the deexcitation properties of the same compound nucleus formed by different pairs of collision partners
• Small cross section of the synthesis of darmstadtium in the ${}^{48}$Ca+${}^{232}$Th reaction
• Role of charged particle emission on the evaporation residue formation in the ${}^{82}$Se+${}^{138}$Ba reaction leading to the ${}^{220}$Th compound nucleus
• Investigation of the formation of superheavy elements with atomic numbers 116 and 120 through ${}^{50}$Ti-induced reaction