Correlation 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 290 A Mev is investigated in this paper. 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. (3)The stronger correlation is found between black track particle, grey track particle and heavily ionizing particle, but the saturation effect is observed in correlation of average multiplicity of black track particle < n b>and multiplicity of grey particle and heavily ionizing particle average multiplicity of shower particle < n s> is weakly depend of the multiplicity of n b, n gand n h, and < n b>, < n g>, < n h>increases with increase of n sand then becomes saturated, which is mainly objected to the lower beam energy. (4)Average multiplicity of black track particle and grey track particle emitted in forward hemisphere and backward hemisphere increases with increase of the number of heavily ionizing track particle and the increase amplitude of < n bf>,< n gf> verses n h is greater than that of < n bB>,< n gB>verses n h.