290 A MeV ~(12)C诱发乳胶核反应末态粒子多重数分布

对290A Mev12C诱发乳胶核反应黒径迹粒子、灰径迹粒子、重电离粒子和簇射粒子的多重数分布、发射角分布进行研究,并与其他能区高能重离子诱发乳胶核反应的结果进行比较.实验结果表明:黒径迹粒子,灰径迹粒子及重电离粒子平均多重数和耙核大小有很强的关联,而簇射粒子平均多重数与耙核大小的关联度很小;黒径迹粒子的发射角分布基本趋于各向同性,但向前的略高于向后的,灰径迹粒子发射角分布遵循指数规律,簇射粒子发射角分布于超前方向.

Multiplicity Distribution of Final State Produced Particles in 290 A Mev ^12C Induced Nuclear Emulsion Interactions

Multiplicity distribution,angular distribution and correlation of black track particle,grey track particle,heavily ionizing particle and shower particle produced in 12C-emulsion interactions at 290A Mev is investigated.The experimental results are compared with that obtained from relativistic heavy ion induced nuclear emulsion.It is found that：1）Multiplicity of black track particle,grey track particle and heavily ionizing track particle is strongly depend of the target size, but shower particle multiplicity is weakly depend of the target size.2）Emission angle distribution of black track particle is almost the same in all the direction,but in forward direction is more than in backward direction,the emission angle distribution of grey track particle obeys a power law distribution and the shower particle is distributed in forward direction.