2026-10-12T13:23:44Z https://www.scidb.cn/oai

10.57760/sciencedb.010b8 2026-09-03T13:29:41Z

2026-09-03 Annihilation mechanism in low-energy antideuteron induced nuclear reactions doi:10.57760/sciencedb.010b8 en The annihilation dynamics of low-energy antideuteron ($\overline{d}$) induced reactions on deuteron, $^{12}$C, $^{40}$Ca, $^{124}$Sn, $^{197}$Au, and $^{208}$Pb has been systematically investigated within the Lanzhou quantum molecular dynamics transport model. The annihilation mechanism of the partial, two-step, and one-step simultaneous processes is taken into account in collisions of $\overline{d}$ on target nuclei. The dependence of pion yields on target mass number and incident energy is systematically analyzed. It is found that the pion momentum spectra from partial and two-step annihilation exhibit a strong dependence on the target nuclei, whereas those from one-step simultaneous annihilation show a relatively weak dependence. With increasing the mass number, the two-step annihilation gradually becomes dominant, accompanied by an increase in pion multiplicity. The pion momentum spectra from the different annihilation mechanism broaden and shift towards to the higher momenta with increasing the incident energy in the reaction of $\overline{d} + ^{12}\text{C}$. The results highlight the interplay between reaction mechanisms and incident energy, and provide constraints for future experimental studies of antideuteron-nucleus annihilation. Antideuteron annihilation; pion momentum spectra; transport model 冯兆庆 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank