Speaker
Description
Recent research has primarily focused on fusion reactions induced by heavy-ion collisions involving projectiles such as $^{51}$V and $^{50}$Ti as potential pathways to extend the known isotopic ranges and to explore new elements. The synthesis pathways of superheavy elements are modeled using the dinuclear system (DNS) approach [1, 2]. The DNS model comprehensively calculates the capture cross section and fusion cross sections, incorporating nuclear structure effects, deformation, and shell corrections that significantly impact fusion probability.
$σ_{ER} (E_{c.m.},\ell)=σ_{cap}(E_{c.m.},\ell)\cdot P_{CN} (E_{c.m.},\ell)\cdot W_{sur} (E_{c.m.},\ell)$. (1)
The reactions $^{50}$Ti+$^{244}$Pu and $^{50}$Ti+$^{251}$Cf were examined theoretically, highlighting their potential for the synthesis of elements 116 and 120. ER cross sections for the $^{50}$Ti+$^{244}$Pu reaction, displaying a peak cross section in the 4n neutron evaporation channel at $σ_{ER}=$0.58 pb, closely aligning with experimental results from recent studies [3]. For the $^{50}$Ti+$^{251}$Cf reaction aimed at synthesizing element 120, significant cross sections of 0.34 pb and 0.23 pb were predicted for the 3n and 4n channels respectively, highlighting this reaction as a promising candidate.
Theoretical predictions for the synthesis of element 119 through the $^{51}$V+$^{248}$Cm reaction indicate a maximum evaporation residue cross section of 12.3 fb at the center-of-mass energy of 232 MeV for the 4n evaporation channel [4]. These results are consistent with prior theoretical predictions, underscoring the reliability and predictive capability of the DNS model in guiding experimental searches for new superheavy elements.
References
[1] A. Nasirov, A. Fukushima, Y. Toyoshima, Y. Aritomo, A.Muminov, S. Kalandarov, and R. Utamuratov, Nucl. Phys. A 759, 342 (2005).
[2] A. K. Nasirov, A. R. Yusupov, B. M. Kayumov, Phys. Rev. C 110, 014618 (2024).
[3] J. M. Gates, R. Orford, D. Rudolph, et al., Phys. Rev. Lett. 133, 172502 (2024).
[4] A. Nasirov, B. Kayumov, Phys. Rev. C 109, 024613 (2024).
