| Title |
"Fragmentation Characteristics of 3.7A GeV 16O Interacting with Emulsion
Nuclei" |
| Type |
PhD |
| Supervisors |
Prof. Dr. A. Abdelsalam , Prof. Dr. M. S. El-Nagdy ,Prof. Dr. B. M. Badawy ,Dr. A. M. Abdalla
|
| Year |
2017 |
| Abstract |
In this experimental work, the projectile fragmentation of 3.7A GeV 16O
interaction with emulsion nuclei is investigated.
Throughout a total scanned length of 195.58 meters, 1540 inelastic
interactions are picked up. The measured mean free path is 12.70±0.33 cm,
which corresponds to interaction cross-section = 988 ±25 mb. This value is
compatible with those calculated on the basis of a geometrical consideration.
The delta-ray counting method is used to identify the charge of each of
projectile fragment. The delta ray distribution of each charge is fitted by a
Gaussian shape. The fragmentation topology of 16O is presented and compared
with that obtained in the interaction of 16O with emulsion nuclei at 60A GeV.
The results show that the mechanism responsible for projectile fragmentation is
independent of the projectile energy.
The probabilities of the different produced projectile fragments indicate that
the He is the most probable channel. This implies that 16O structure tends to
have clustering behavior. This clustering effect is independent of the incident
beam energy.
The events associated with single nucleon participations are supposed to be
due to a single charge particle or neutron stripped from the projectile. The
multiplicity characteristics of particles produced from these events are compared
with those due to p-Emulsion interaction at the same energy as well as the
prediction of the cascade-evaporation model. The study shows that the
interactions of these stripped nucleons occur only with a free or quasi free
nucleon with the absence of cascading.
|
| Keywords |
|
| University |
Benha University |
| Country |
Egypt |
| Full Paper |
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|
