中能區(qū)橢圓流和轉(zhuǎn)變能的系統(tǒng)質(zhì)量依賴外文翻譯(編輯修改稿)
2025-02-13 22:01 本頁面
【文章內(nèi)容簡介】 iptic flow parameters at energies from Fermi energy to the relativistic energy regime for 197Au+197Au has been measured by the FOPI, INDRA, and ALADIN Collaborations , and the transition energy from positive to negative elliptic flow was confirmed, which is around 100 MeV/nucleon. Both the mean field and twobody collision parts play important roles in thisenergy region. The mean field plays a dominant role at low energies, and then gradually the twobody collision bees dominant with energy increases. Thus, a detailed study of the excitation function of elliptical flow in this energy region can provide more useful information on the nucleonnucleon interaction related to the equation of state of nuclear matter and the medium correction of nucleonnucleon cross sections. The transition energy of elliptic flow at intermediate energies may be particularly useful in extracting information on the nuclear effective interaction. While elliptic flow at energies higher than the transition energy will be useful in extracting the medium correction of nucleonnucleon cross sections because twobody collisions play a more important role on collective flow at these energies . Another aim of this work is to investigate the medium correction of nucleonnucleon cross sections through elliptic flow in heavy ion collisions at energies from the Fermi energy to relativistic energies.In this report, we apply the new version of the improved quantum molecular dynamics model (ImQMD05) to study the excitation function of elliptic flow parameters for 197Au+197Au at intermediate energies, and through the parison between measurement and model calculations to extract the information on the effective interaction related to the EoS and the medium correction of nucleonnucleon cross sections. The system size dependence of transition energies of elliptic flow from 58Ni+58Ni to 197Au+197Au will also be studied.For the convenience of the readers, we first give a brief introduction of the ImQMD05 model. The main developments of the ImQMD model pared with the usual IQMD model are the introduction of (1) the isospin independent and dependent surface energy terms in the energy density functional, (2) the constraint on the singleparticle occupation number, and (3) the system size dependent wave packet width . The ImQMD model can successfully describe the yields of clusters in intermediate energy heavy ion collisions . In the ImQMD05 model, we introduce the full Skyrme potential energy density functional except for the spinorbit term in the local interaction part, which allows us to choose various Skyrme interactions that describe the ground states of nuclei and satura
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