Coincidence measurements of slow recoil ions with projectile ions in 42-MeV Ar sup q + -Ar collisions

Journal Article · Thu Nov 30 23:00:00 EST 1989 · Physical Review (Section) A: General Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevA.40.6238· OSTI ID:7163626

Tonuma, T; Kumagai, H ^[1]; Matsuo, T ^[2]; Tawara, H ^[3]

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1. The Institute of Physical Chemical Research RIKEN, Wako-shi, Saitama 351-01, Japan (Japan)
2. Department of Pathology, Tokyo Medical Dental University, Yushima, Tokyo 113, (Japan)
3. National Institute of Fusion Science, Nagoya 464-01, (Japan)

Slow Ar recoil-ion production cross sections by projectiles of 1.05-MeV/amu Ar{sup {ital q}+} (q=4,6,8,10,12,14) were measured using a projectile-ion--recoil-ion coincidence technique. The present results indicate that the average recoil ion charges {l angle}{ital i}{r angle} increase with increasing the incident projectile charge {ital q} and the number of the lost and captured electrons from and/or into projectiles, whereas the projectile charge-changing cross sections for loss ionization decrease steeply with increasing {ital q} for low-charge-state projectiles, and those for transfer ionization increase rapidly with increasing {ital q} for high-charge-state projectiles. For Ar projectiles with {ital q}=10, which corresponds to the equilibrium charge state of Ar projectiles at the present collision energy, the average recoil-ion charges are nearly the same in both loss and transfer ionization, and a pure ionization process plays a much more important role in producing highly charged recoil ions, in contrast to projectile electron loss or transfer processes, which play a role in other projectile charge states.

• OSTI ID: 7163626
• Journal Information: Physical Review (Section) A: General Physics; (USA), Journal Name: Physical Review (Section) A: General Physics; (USA) Vol. 40:11; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
CAPTURE
CHARGE STATES
CHARGED PARTICLES
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
CROSS SECTIONS
ELECTRON CAPTURE
ELECTRON LOSS
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
ION COLLISIONS
ION SPECTROSCOPY
ION-ATOM COLLISIONS
IONS
MEV RANGE
MEV RANGE 10-100
MULTICHARGED IONS
NONMETALS
RARE GASES
RECOILS
SPECTROSCOPY