Extracting Information of Nucleon-nucleon Cross Section from Energy Spectrum
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Graphical Abstract
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Abstract
The collision of different neutron/proton ratio， intermediate mass reaction systems(76Zn+76Zn， 76Ge+76Ge，76Se+76Se and 76Kr+76Kr) at the beam energy of 30~200 MeV/u are studied by using isospindependent quantum molecular dynamics(IQMD) model. It is found that there exists a strong relationship between nuclear stopping and the ratio of different direction kinetic energy， and nuclear stopping can be replaced by the square root of the ratio of perpendicular and parallel total kinetic energy of fragments， and it can be used to extract information of isospindependent in medium nucleonnucleon cross section. This physical quantity can be easily measured in nuclear reaction experiments， and it is a better probe.
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