Inelastic Interactions of Particles at High Energies I. (The Composition and Multiplicity of Secondary Particles)

1966 ◽  
Vol 14 (1-12) ◽  
pp. 357-399 ◽  
Author(s):  
V. S. Barashenkov ◽  
V. M. Maltsev ◽  
I. Patera ◽  
V. D. Toneev
Keyword(s):  
Secondary Particles ◽  
High Energies ◽  
Inelastic Interactions

Characteristics of the total disintegration events of emulsion heavy target nuclei caused by O16 and 28Si nuclei at high energies

2012 ◽  
Vol 90 (12) ◽  
pp. 1267-1278 ◽  
Author(s):  
Mahmoud Mohery
Keyword(s):  
Gaussian Distribution ◽  
Linear Dependence ◽  
Average Multiplicity ◽  
Secondary Particles ◽  
High Energies ◽  
Heavy Target ◽  
Inelastic Interactions ◽  
Free Hydrogen ◽  
Multiplicity Distributions ◽  
Fireball Model

The present paper deals with the interactions of 16O and 28Si nuclei with emulsion heavy target nuclei (silver (Ag) and bromine (Br)) at 4.5A GeV/c. The results have been analyzed to identify interesting characteristics of the total disintegration (TD) events produced in these interactions. Events having a number of heavily ionizing particles Nh ≥ 28 have been selected in this study. The integral multiplicity distributions for the disintegrated particles from the target nuclei have been used to separate the inelastic interactions with the free hydrogen (H), the light (CNO), and the heavy (AgBr) nuclei. The average multiplicities of the different secondary particles emitted in these interactions have been compared with the corresponding ones of different projectiles nearly at the same momentum. The average multiplicity of the grey particles is found to increase with the mass of the projectile, while the average multiplicity of the black particles is found to decrease with increasing mass of the projectile; this result agrees with the prediction of the fireball model. Also, the dependence of the shower, grey, and black particles produced in the TD events on the mass of the projectile has been studied. Moreover, the dependence of the probability of the TD for the projectile mass as well as the target fragments has also been discussed. The results show that the multiplicity distributions of the shower, grey, and black particles present a Gaussian distribution. Finally, the linear dependence of the grey and compound multiplicities on the black, heavy, and shower particles has also been observed.

Fourth workshop on inelastic interactions at high energies

1976 ◽  
Vol 119 (7) ◽  
pp. 578
Author(s):  
Igor M. Dremin ◽  
G.B. Zhdanov ◽  
V.Ya. Fainberg
Keyword(s):  
High Energies ◽  
Inelastic Interactions

CLUSTER PRODUCTION IN 14.5A GeV/c Si-NUCLEUS COLLISIONS

1999 ◽  
Vol 08 (02) ◽  
pp. 121-129 ◽  
Author(s):  
A. SHAKEEL ◽  
W. B. TAK ◽  
N. AHMAD ◽  
A. R. KHAN ◽  
M. ZAFAR ◽  
...  
Keyword(s):  
Charged Particles ◽  
Nuclear Collisions ◽  
Secondary Particles ◽  
High Energies ◽  
Rapidity Gap

Characteristics of clusters of relativistic charged secondaries produced in 14.5A GeV/c Si-nucleus collisions are investigated by examining the behaviour of the rapidity gap distribution. The findings reveal that the maximum number of relativistic charged particles constituting a cluster is four. Further, the size of the cluster is observed to remain essentially independent of the mass of the struck nucleus. A comparison of the result of the present study with those reported earlier for hadron-hadron and hadron-nucleus collisions indicates that similar mechanisms may operate in the production of secondary particles in both hadronic and nuclear collisions at high energies.

Proton-proton interactions at 650 MeV

1956 ◽  
Vol 237 (1209) ◽  
pp. 175-185 ◽  
Keyword(s):  
Magnetic Field ◽  
Angular Distribution ◽  
Elastic Scattering ◽  
Optical Model ◽  
Isotopic Spin ◽  
Proton Synchrotron ◽  
Strong Correlations ◽  
Proton Proton ◽  
Secondary Particles ◽  
High Energies

Protons of mean energy 650 MeV from the Birmingham proton synchrotron have been passed through a hydrogen-filled diffusion cloud chamber located in a pulsed magnetic field, and a total of 317 interactions observed. Of these, 205 were elastic collisions and the remaining 112 involved the production of π + -and π °-mesons in the ratio 4.3 to 1. The elastic/inelastic ratio and the π +/ π ° ratio agree with those obtained elsewhere; so also does the angular distribution of the elastically scattered protons, though the present experiment includes angles smaller than those covered in previous work. The elastic scattering is discussed in terms of the optical model of the nucleus and involves a radius of interaction of about 0.8 x 10 -13 cm. Of events of the type p + p → n + p + π + , 53 were analyzed in detail and strong correlations were found between the directions of the proton and the meson, and of the proton and the neutron. These correlations, and the π + / π 0 ratio, are consistent with an hypothesis due to Peaslee that at high energies such reactions proceed through an intermediate state of isotopic spin I = 3/2, involving the formation of an ‘excited nucleon’ which subsequently decays into a proton and a π + -meson. The Q -value distributions for pairs of secondary particles in the above reaction also support this hypothesis.

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