Possibility to synthesize <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Z</mml:mi><mml:mo>></mml:mo><mml:mn>118</mml:mn></mml:mrow></mml:math> superheavy nuclei with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Cr</mml:mi><mml:mprescripts/><mml:none/><mml:mn>54</mml:mn></mml:mmultiscripts></mml:math> projectiles
Jiaxing Li, Hongfei Zhang
Abstract
The capture and evaporation residue cross sections (ERCSs) for heavy ion fusion reactions are calculated by using the dinuclear system model. The calculation results are in good agreement with the experimental data of reactions $^{48}\mathrm{Ca}+^{244}\mathrm{Pu}$ and $^{48}\mathrm{Ca}+^{248}\mathrm{Cm}$. To investigate the possibility of synthesizing superheavy nuclei (SHN) with $Z>118$ using the $^{54}\mathrm{Cr}$ projectile, a comparative analysis is conducted between the ERCSs obtained with $^{48}\mathrm{Ca}$ and $^{54}\mathrm{Cr}$ projectiles for the synthesis of SHN with $Z=114--118$. The analysis further investigates the variation trends of ERCSs, capture cross sections, fusion probabilities, and survival probabilities with an increasing compound nucleus proton number (${Z}_{\mathrm{CN}}$). Furthermore, we predict the ERCSs for the synthesis of new elements $Z=119, Z=120, Z=121$, and $Z=122$ through the reactions $^{54}\mathrm{Cr}+^{243}\mathrm{Am}, ^{54}\mathrm{Cr}+^{248}\mathrm{Cm}, ^{54}\mathrm{Cr}+^{249}\mathrm{Bk}$, and $^{54}\mathrm{Cr}+^{249}\mathrm{Cf}$, respectively. However, the obtained results fall below the detectable limits of currently available facilities. Thus, to successfully synthesize SHN with $Z>118$, experimental efforts must focus on increasing the beam intensity and improving separation and detection techniques.