Target residues formed in the 4.4 GeV deuteron-induced reaction on gold

The production cross sections for 110 radioactive nuclides, with mass numbers $22\le A\le 198$, were obtained from the interaction of 4.4 GeV deuteron with a ${}^{197}\mathrm{Au}$ target using the induced-activity method. The deuteron beam was obtained from the Nuclotron of the Laboratory of High Energies (LHE), Joint Institute for Nuclear Research (JINR) at Dubna. Using the charge distribution data, we derived the total mass-yield distribution. The analysis of the mass-yield distribution allowed us to consider the coexistence of different channels in the interaction such as evaporation, fission, and multifragmentation.

Figure 1

The charge distributions for the isobaric chains in the mass ranges (a) $A=42\text{–}65$, (b) $A=83\text{–}127$, (c) $A=133\text{–}198$ for the 4.4 GeV deuteron-induced reaction on ${}^{197}\mathrm{Au}$. The solid line is the result of the fitting procedure explained in the text.

Figure 2

Average atomic number as a function of neutron number for the observed nuclides. The black dashed line corresponds to the stable nuclei, the black solid line is for $Z_p$ for $A<130$, and the dotted line is for $Z_p$ for $A>130$.

Figure 3

Mass-yield distribution of the isobars produced by the 4.4 GeV deuteron-induced reaction on ${}^{197}\mathrm{Au}$. The solid line shows the general trend of the isobaric cross sections of the reaction fragments.

Figure 4

The ratio of experimental cross sections, ${\sigma }_d/{\sigma }_p$, obtained for the residues from the 4.4 GeV deuteron reaction on ${}^{197}\mathrm{Au}$ target of the present work and (a) from the 3.65 GeV proton-induced reaction on ${}^{197}\mathrm{Au}$ from Ref. [8] and (b) from the 3.0 GeV proton-induced reaction on ${}^{197}\mathrm{Au}$ from Ref. [3].

Figure 5

The ratio of experimental cross sections ${\sigma }_d/{\sigma }_d$ of residues from the reactions of 7.3 GeV deuterons [13] and the data of the present work of 4.4 GeV deuterons on the same ${}^{197}\mathrm{Au}$ target.