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Title: Direct detection of atomic ions from molecular photofragmentation during nonresonant multiphoton ionization of sputtered species

Abstract

The photoionization of sputtered Cu, Al, and Ru atoms and dimers was investigated by measuring velocity distributions using both resonant and nonresonant photoionization. Nonresonant ionization produced an atomic distribution that peaked at the same velocity as the respective dimer distribution, indicating that virtually all the nonresonant atomic ion signal is from photofragmented dimers. Various mechanisms of dimer photofragmentation are discussed. Domination of the atomic photoion channel by molecule fragmentation appears to be a general phenomenon that must be accounted for in all gas-phase multiphoton nonresonant ionization experiments at easily achievable laser power densities ({le} 10{sup 9} W/cm{sup 2}).

Authors:
; ;  [1];  [2];  [3]
  1. Argonne National Lab., IL (United States)
  2. Ames Lab., IA (United States)
  3. Texas Univ., Austin, TX (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10184330
Report Number(s):
ANL/CHM/PP-79176
ON: DE93040886; TRN: 93:022913
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1993]
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COPPER; PHOTOIONIZATION; ALUMINIUM; RUTHENIUM; MULTI-PHOTON PROCESSES; ATOMS; DIMERS; SPUTTERING; 664200; 400500; SPECTRA OF ATOMS AND MOLECULES AND THEIR INTERACTIONS WITH PHOTONS; PHOTOCHEMISTRY

Citation Formats

Coon, S R, Calaway, W F, Pellin, M J, Burnett, J W, and White, J M. Direct detection of atomic ions from molecular photofragmentation during nonresonant multiphoton ionization of sputtered species. United States: N. p., 1993. Web. doi:10.2172/10184330.
Coon, S R, Calaway, W F, Pellin, M J, Burnett, J W, & White, J M. Direct detection of atomic ions from molecular photofragmentation during nonresonant multiphoton ionization of sputtered species. United States. https://doi.org/10.2172/10184330
Coon, S R, Calaway, W F, Pellin, M J, Burnett, J W, and White, J M. Wed . "Direct detection of atomic ions from molecular photofragmentation during nonresonant multiphoton ionization of sputtered species". United States. https://doi.org/10.2172/10184330. https://www.osti.gov/servlets/purl/10184330.
@article{osti_10184330,
title = {Direct detection of atomic ions from molecular photofragmentation during nonresonant multiphoton ionization of sputtered species},
author = {Coon, S R and Calaway, W F and Pellin, M J and Burnett, J W and White, J M},
abstractNote = {The photoionization of sputtered Cu, Al, and Ru atoms and dimers was investigated by measuring velocity distributions using both resonant and nonresonant photoionization. Nonresonant ionization produced an atomic distribution that peaked at the same velocity as the respective dimer distribution, indicating that virtually all the nonresonant atomic ion signal is from photofragmented dimers. Various mechanisms of dimer photofragmentation are discussed. Domination of the atomic photoion channel by molecule fragmentation appears to be a general phenomenon that must be accounted for in all gas-phase multiphoton nonresonant ionization experiments at easily achievable laser power densities ({le} 10{sup 9} W/cm{sup 2}).},
doi = {10.2172/10184330},
url = {https://www.osti.gov/biblio/10184330}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {9}
}