Characteristics of the Interactions of Helium Fragment from 200A Ge V 32 S- Emulsion Collisions
Maha Fayed Abd-Elmoniem Abd-Elhafiez;
Abstract
The aim of the present thesis is to study the interaction of the helium fragment emitted from the collisions of 32S nuclei at 200A GeV with nuclear emulsion in order to check whether the interaction cross section of the helium fragment differs from that of the primary accelerated helium beam.Since uptill now no primary helium beam at energy greater than Dubna energy is available, the present work could provide a good chance for obtaining valuable information about the characteristics of helium beam at higher energy.
A stack of Fuji emulsion film, was tangentially irradiated with
200A GeV 32 S ion beam. The exposure of this stack was carried out at the CERN SPS. The beam flux was 1 x 103 ions/cm3, the scanning was carried out along the track (fast in the forward direction and slow in the backward one).
The experimental value of the interaction mean free path and that of the interaction cross section of 32S nuclei in the emulsion are consistant with the corresponding calculated values which are based on geometrical calculations.
The charge Z of each of all the projectile fragments PF's (having Z
2:: 2) emitted within the fragmentation cone of an angle 0.072 degree, were measured using the 8-ray counting method.
This work is concerned with studying the doubly charged helium fragments and the characteristic of their interactions with emulsion. It was found that the fragmentation cross-section of different projectiles into helium fragments, does not depend on either projectile mass or incident
energy.
A stack of Fuji emulsion film, was tangentially irradiated with
200A GeV 32 S ion beam. The exposure of this stack was carried out at the CERN SPS. The beam flux was 1 x 103 ions/cm3, the scanning was carried out along the track (fast in the forward direction and slow in the backward one).
The experimental value of the interaction mean free path and that of the interaction cross section of 32S nuclei in the emulsion are consistant with the corresponding calculated values which are based on geometrical calculations.
The charge Z of each of all the projectile fragments PF's (having Z
2:: 2) emitted within the fragmentation cone of an angle 0.072 degree, were measured using the 8-ray counting method.
This work is concerned with studying the doubly charged helium fragments and the characteristic of their interactions with emulsion. It was found that the fragmentation cross-section of different projectiles into helium fragments, does not depend on either projectile mass or incident
energy.
Other data
| Title | Characteristics of the Interactions of Helium Fragment from 200A Ge V 32 S- Emulsion Collisions | Other Titles | خصائص تفاعلات شظايا الهيليوم الناتجة من تصادمات الكبريت 32 مع المستحلب النووى عند طاقة 200 جيجا إلكترون فولت لكل نيكلون | Authors | Maha Fayed Abd-Elmoniem Abd-Elhafiez | Issue Date | 2005 |
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