RESUMO
We have studied the double ionization of helium and other rare gases using an electron-ion coincidence technique. With this scheme, the electron energy spectrum correlated to the creation of a doubly charged ion may be compiled. In all cases, the observed double ionization electron distributions are similar and enhanced at high energies, while the single ionization spectra exhibit distinct differences.
Assuntos
Acetamidas/uso terapêutico , Deficiência Intelectual/tratamento farmacológico , Transtornos Mentais/tratamento farmacológico , Pirrolidinonas/uso terapêutico , Adolescente , Criança , Transtornos do Comportamento Infantil/tratamento farmacológico , Pré-Escolar , Demência/tratamento farmacológico , Epilepsia/complicações , Humanos , Injeções Intramusculares , Prognóstico , Testes PsicológicosAssuntos
Anormalidades Múltiplas , Aberrações Cromossômicas , Transtornos Cromossômicos , Síndrome de Cri-du-Chat/diagnóstico , Cromossomos Humanos 4-5 , Disostose Craniofacial , Dermatoglifia , Pálpebras/anormalidades , Humanos , Lactente , Deficiência Intelectual , Cariotipagem , Masculino , Microcefalia , Micrognatismo , Deformidades Adquiridas Nasais , RetrognatismoRESUMO
The double ionization of helium in the strong-field limit has been studied using an electron-ion coincidence technique. The observed double ionization electron energy spectra differ significantly from the single ionization distributions. This gives new support to the rescattering model of double ionization and explicitly reveals the role of backward electron emission following the e-2e ionizing collision.
RESUMO
The double ionization of argon and xenon in an intense laser field has been studied in detail using an electron-ion coincidence technique. The observed double ionization electron spectra in xenon show resonancelike structures here resolved for the first time. In argon, the featureless spectra are consistent with rescattering. This represents a clear transition in the dynamics of strong-field double ionization, analogous to the well-known transition between the tunneling and multiphoton regimes in single ionization.