On the slow particles production in heavy ion induced emulsion interactions at intermediate and high energy

The multiplicity distributions and correlations of target fragments produced in 150 AMeV ⁴He, 290 AMeV ¹²C, 400 AMeV ¹²C, 400 AMeV ²⁰Ne and 500 AMeV ⁵⁶Fe induced different emulsion target interactions are investigated. It is found that the averaged multiplicity of grey track particle, black track particle and heavily ionized track particle increase with the increase of target size. There is a linear correlation between the multiplicity of different target fragments. The experimental results can be well explained based on the geometrical picture and the cascade evaporation model of nucleus-nucleus interactions. (authors)