Time- and frequency-domain properties of light emitted in slow ion-atom collisions

Herbert F M DaCosta, David A. Micha, Keith A Runge

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We describe light emission from the complex formed during ion-atom collisions, that arises from electronic charge transfer and the related oscillatory dipole of the complex. This is treated in an eikonal/time-dependent Hartree-Fock approach which accounts for coupling of electronic and nuclear motions and generates the time-dependent dipole of the complex. Calculations were done for H++H with a basis set of travelling atomic functions, for collision energies of 100, 250, and 1000 eV, to obtain the energy emitted per solid angle versus both time and the light frequency. Results are presented for the intensity components of the light emitted parallel and perpendicular to the incoming projectile H+ velocity. Light emission is found to last several femtoseconds, and to be distributed over ultraviolet frequencies. The intensity of light emitted by the complex H2+ increases as collision energies are lowered.

Original languageEnglish (US)
Pages (from-to)9018-9027
Number of pages10
JournalThe Journal of Chemical Physics
Volume107
Issue number21
StatePublished - Dec 1 1997
Externally publishedYes

Fingerprint

Heavy ions
Light emission
Atoms
collisions
light emission
dipoles
atoms
ions
Projectiles
electronics
energy
Charge transfer
projectiles
charge transfer
Ions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Time- and frequency-domain properties of light emitted in slow ion-atom collisions. / DaCosta, Herbert F M; Micha, David A.; Runge, Keith A.

In: The Journal of Chemical Physics, Vol. 107, No. 21, 01.12.1997, p. 9018-9027.

Research output: Contribution to journalArticle

DaCosta, Herbert F M ; Micha, David A. ; Runge, Keith A. / Time- and frequency-domain properties of light emitted in slow ion-atom collisions. In: The Journal of Chemical Physics. 1997 ; Vol. 107, No. 21. pp. 9018-9027.
@article{4eb07f92905b4381922ced77c0e8066b,
title = "Time- and frequency-domain properties of light emitted in slow ion-atom collisions",
abstract = "We describe light emission from the complex formed during ion-atom collisions, that arises from electronic charge transfer and the related oscillatory dipole of the complex. This is treated in an eikonal/time-dependent Hartree-Fock approach which accounts for coupling of electronic and nuclear motions and generates the time-dependent dipole of the complex. Calculations were done for H++H with a basis set of travelling atomic functions, for collision energies of 100, 250, and 1000 eV, to obtain the energy emitted per solid angle versus both time and the light frequency. Results are presented for the intensity components of the light emitted parallel and perpendicular to the incoming projectile H+ velocity. Light emission is found to last several femtoseconds, and to be distributed over ultraviolet frequencies. The intensity of light emitted by the complex H2+ increases as collision energies are lowered.",
author = "DaCosta, {Herbert F M} and Micha, {David A.} and Runge, {Keith A}",
year = "1997",
month = "12",
day = "1",
language = "English (US)",
volume = "107",
pages = "9018--9027",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "21",

}

TY - JOUR

T1 - Time- and frequency-domain properties of light emitted in slow ion-atom collisions

AU - DaCosta, Herbert F M

AU - Micha, David A.

AU - Runge, Keith A

PY - 1997/12/1

Y1 - 1997/12/1

N2 - We describe light emission from the complex formed during ion-atom collisions, that arises from electronic charge transfer and the related oscillatory dipole of the complex. This is treated in an eikonal/time-dependent Hartree-Fock approach which accounts for coupling of electronic and nuclear motions and generates the time-dependent dipole of the complex. Calculations were done for H++H with a basis set of travelling atomic functions, for collision energies of 100, 250, and 1000 eV, to obtain the energy emitted per solid angle versus both time and the light frequency. Results are presented for the intensity components of the light emitted parallel and perpendicular to the incoming projectile H+ velocity. Light emission is found to last several femtoseconds, and to be distributed over ultraviolet frequencies. The intensity of light emitted by the complex H2+ increases as collision energies are lowered.

AB - We describe light emission from the complex formed during ion-atom collisions, that arises from electronic charge transfer and the related oscillatory dipole of the complex. This is treated in an eikonal/time-dependent Hartree-Fock approach which accounts for coupling of electronic and nuclear motions and generates the time-dependent dipole of the complex. Calculations were done for H++H with a basis set of travelling atomic functions, for collision energies of 100, 250, and 1000 eV, to obtain the energy emitted per solid angle versus both time and the light frequency. Results are presented for the intensity components of the light emitted parallel and perpendicular to the incoming projectile H+ velocity. Light emission is found to last several femtoseconds, and to be distributed over ultraviolet frequencies. The intensity of light emitted by the complex H2+ increases as collision energies are lowered.

UR - http://www.scopus.com/inward/record.url?scp=0031380558&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031380558&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031380558

VL - 107

SP - 9018

EP - 9027

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 21

ER -