Postcollisional decay in Ne multiple ionization by H2+ ions in breakup collisions
Author(s)
Sant'Anna, MM
Luna, H
Santos, ACF
McGrath, C
Shah, MB
Cavalcanti, EG
Sigaud, GM
Montenegro, EC
Griffith University Author(s)
Year published
2003
Metadata
Show full item recordAbstract
We measured the Neq+ charge-state yield distribution for Ne atoms multiply ionized by 1-MeV/amu H2+, in coincidence with the final state of the projectile, for both breakup and nonbreakup channels. Measurements with 1-MeV H+ projectiles were also performed. While the H2+ nonbreakup channel produces results similar to equal-velocity proton or electron projectiles, the breakup channels lead to a charge-state yield distribution very close to the known Ne 2s-1 postcollisional decay distribution, measured through photoionization [T. A. Carlson, W. E. Hunt, and M. O. Krause, Phys. Rev. 151, 41 (1966)]. This behavior suggests that, ...
View more >We measured the Neq+ charge-state yield distribution for Ne atoms multiply ionized by 1-MeV/amu H2+, in coincidence with the final state of the projectile, for both breakup and nonbreakup channels. Measurements with 1-MeV H+ projectiles were also performed. While the H2+ nonbreakup channel produces results similar to equal-velocity proton or electron projectiles, the breakup channels lead to a charge-state yield distribution very close to the known Ne 2s-1 postcollisional decay distribution, measured through photoionization [T. A. Carlson, W. E. Hunt, and M. O. Krause, Phys. Rev. 151, 41 (1966)]. This behavior suggests that, in the breakup channels, contributions to multiple ionization from mechanisms that are usually considered to be dominant in ion-atom collisions are less important than the postcollisional decay.
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View more >We measured the Neq+ charge-state yield distribution for Ne atoms multiply ionized by 1-MeV/amu H2+, in coincidence with the final state of the projectile, for both breakup and nonbreakup channels. Measurements with 1-MeV H+ projectiles were also performed. While the H2+ nonbreakup channel produces results similar to equal-velocity proton or electron projectiles, the breakup channels lead to a charge-state yield distribution very close to the known Ne 2s-1 postcollisional decay distribution, measured through photoionization [T. A. Carlson, W. E. Hunt, and M. O. Krause, Phys. Rev. 151, 41 (1966)]. This behavior suggests that, in the breakup channels, contributions to multiple ionization from mechanisms that are usually considered to be dominant in ion-atom collisions are less important than the postcollisional decay.
View less >
Journal Title
Physical Review A (Atomic, Molecular and Optical Physics)
Volume
68
Issue
4
Publisher URI
Subject
Mathematical sciences
Physical sciences
Atomic and molecular physics