Stringent constraints on nuclear dissipation by second-chance survival probability

We propose second-chance survival probability (Psur2) as a new observable to constrain the nuclear dissipation strength (& beta;). Using the Langevin model, we calculate Psur2 as a function of & beta; for 232Cf, 230Cm, and 216U at different bombarding energies Elab, which are respectively populated in 28S + 204Pb, 26Si + 204Pb, and 36Ar + 180W reactions. It is shown that Psur2 is quite sensitive to & beta;. Moreover, we find that the dependence of Psur2 on & beta; is far larger than on Elab, indicating the robustness of using Psur2 to pinpoint & beta;. Our findings suggest that in experiments, a measurement of the second-chance survival probability of neutron-deficient heavy systems at a high energy not only puts a stronger constraint on presaddle friction, but also it provides a good way to probe the temperature dependence of nuclear dissipation.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

Automated summary

We propose the second-chance survival probability (Psur2) as a new observable to constrain the nuclear dissipation strength (β). By using the Langevin model, we calculate Psur2 as a function of β for 232Cf, 230Cm, and 216U at different bombarding energies Elab. The results show that Psur2 is highly sensitive to β. Furthermore, we find that Psur2 depends more on β than on Elab, indicating the reliability of using Psur2 to determine β. Our findings suggest that measuring the second-chance survival probability of neutron-deficient heavy systems at high energy can not only provide a stronger constraint on presaddle friction but also offer a good method to probe the temperature dependence of nuclear dissipation.