Inclusive Intermediate-Mass Fragments（IMFs）are measured at seven angles for the<sup>40</sup>Ar+Ag reaction at 25 MeV/u.The energy spectra of IMF from Li to F are obtained.A thermal mod-el with the same p...Inclusive Intermediate-Mass Fragments（IMFs）are measured at seven angles for the<sup>40</sup>Ar+Ag reaction at 25 MeV/u.The energy spectra of IMF from Li to F are obtained.A thermal mod-el with the same parameters well fits the energy spectra of all IMFs at backward angles.These IMFs areevaporated from hot nuclei formed in an incomplete fusion process.The angular distribution and Z distri-bution are calculated with the statistical code GEMINI.展开更多
We propose a dynamical description of the ^(136)Xe + p spallation at 1000 MeV/nucleon with the aim of probing the mechanism which rules the production of intermediate-mass fragments(IMF). The isospin-dependent quantum...We propose a dynamical description of the ^(136)Xe + p spallation at 1000 MeV/nucleon with the aim of probing the mechanism which rules the production of intermediate-mass fragments(IMF). The isospin-dependent quantum molecular dynamics(IQMD) model is used to describe the dynamical process of spallation until hot fragments with excitation energy less than a certain value E_(stop) are formed. The statistical code GEMINI is applied to simulate the light-particle evaporation from hot fragments. It is found that IMF production is well described by the model when E_(stop)= 2 MeV/nucleon is used. Comparison of the calculated mean neutron-to-proton ratio and the experimental data indicates that E_(stop) should be 3 MeV/nucleon.展开更多
基金①The project supported by the National Natural Science Foundation of China
文摘Inclusive Intermediate-Mass Fragments（IMFs）are measured at seven angles for the<sup>40</sup>Ar+Ag reaction at 25 MeV/u.The energy spectra of IMF from Li to F are obtained.A thermal mod-el with the same parameters well fits the energy spectra of all IMFs at backward angles.These IMFs areevaporated from hot nuclei formed in an incomplete fusion process.The angular distribution and Z distri-bution are calculated with the statistical code GEMINI.
基金Supported by the National Natural Science Foundation of China(11405278)
文摘We propose a dynamical description of the ^(136)Xe + p spallation at 1000 MeV/nucleon with the aim of probing the mechanism which rules the production of intermediate-mass fragments(IMF). The isospin-dependent quantum molecular dynamics(IQMD) model is used to describe the dynamical process of spallation until hot fragments with excitation energy less than a certain value E_(stop) are formed. The statistical code GEMINI is applied to simulate the light-particle evaporation from hot fragments. It is found that IMF production is well described by the model when E_(stop)= 2 MeV/nucleon is used. Comparison of the calculated mean neutron-to-proton ratio and the experimental data indicates that E_(stop) should be 3 MeV/nucleon.
