-shell ionization of light elements by proton and helium-3-ion impact
Journal Article
·
· Physical Review, A (General Physics)
K-shell ionization cross sections for Al and Si by proton and 3He- ion impacts have been measured with thin targets and a proportional counter over the projectile energy range 0.75--4 MeV/amu. The results, together with others on light elements, are compared with theoretical predictions based on the plane- wave Born approximation and the binary-encounter approximation, and it is found that the scaling law, taking into account the effects of the Coulomb deflection of the projectile and the increase of binding energy of K-shell electrons, gives a good fit to the experimental results over the entire energy range measured. Ratios of the K-shell ionization cross sections for helium-ion impact to those for proton impact show deviations from the Z21 dependence predicted by the Coulomb interaction theory. Possible reasons for this deviation are discussed.
- Research Organization:
- Nuclear Engineering Department, Kyushu University, Fukuoka, Japan
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-021165
- OSTI ID:
- 4076688
- Journal Information:
- Physical Review, A (General Physics), Journal Name: Physical Review, A (General Physics) Journal Issue: 2 Vol. 13; ISSN PLRAAN; ISSN 0556-2791
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*ALUMINIUM-- ION-ATOM COLLISIONS
*SILICON-- ION-ATOM COLLISIONS
640304* --Physics Research--Atomic
Molecular & Chemical Physics--Collision Phenomena
BINARY ENCOUNTER METHOD
BORN APPROXIMATION
CROSS SECTIONS
HYDROGEN IONS 1 PLUS
IONIZATION
KEV RANGE 100-1000
MEV RANGE 01-10
MEV RANGE 10-100
N60400* --Physics (Atomic & Molecular)--Collision Phenomena
SCALING LAWS
X-RAY SPECTRA HELIUM IONS-- HELIUM 3
*SILICON-- ION-ATOM COLLISIONS
640304* --Physics Research--Atomic
Molecular & Chemical Physics--Collision Phenomena
BINARY ENCOUNTER METHOD
BORN APPROXIMATION
CROSS SECTIONS
HYDROGEN IONS 1 PLUS
IONIZATION
KEV RANGE 100-1000
MEV RANGE 01-10
MEV RANGE 10-100
N60400* --Physics (Atomic & Molecular)--Collision Phenomena
SCALING LAWS
X-RAY SPECTRA HELIUM IONS-- HELIUM 3