Document Details

Document Type : Article In Journal 
Document Title :
Charge-state distributions of energetic He-4 ions backscattered from Kr gas target
Charge-state distributions of energetic He-4 ions backscattered from Kr gas target
 
Subject : physics 
Document Language : English 
Abstract : The energy dependence of the charge-state fractions of He-4 ions backscattered at 90 degrees from Kr gas target atoms was investigated for impact energies varying from 0.4 to 2.0 MeV. The fractions were measured using a small electrostatic post-accelerator system. The measured fractions were compared with previous literature results for backscattered He-4 ions from solid targets, and with results for transmitted He-4 ions through foils. It is observed that the charge-state distributions are strikingly identical for the Kr gas and solid targets, within the investigated energy range. The fractions were also found to be insensitive to the incident ion charge-state within the investigated energy range. The findings suggest that, for both gas and solid targets, any memory of the incident ion charge-state is lost during the early stages of the interactions and that the final charge-state distribution is determined during the final stages. A semi-classical theoretical approach based on the early Bohr theory and suggested by Bianconi et al. [18] was attempted and accounted reasonably well for the experimental results. 
ISSN : 0168-583X 
Journal Name : NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATO 
Volume : 271 
Issue Number : 1 
Publishing Year : 1433 AH
2012 AD 
Article Type : Article 
Added Date : Tuesday, July 25, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
H Sa'adehSa'adeh, H InvestigatorDoctorate 
R Ali,Ali, R Ali,ResearcherDoctorate 
D.E ArafahArafah, D.E ResearcherDoctorate 

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