skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Analysis of ion-bombarded and laser-irradiated surfaces of ZnS and Zn via two-photon high-resolution laser-induced fluorescence spectroscopy

Abstract

Doppler-shifted two-photon laser-induced fluorescence spectroscopy (LFS) has been used for the first time to measure the velocity distributions of Zn atoms ejected by Ar/sup /plus// ion bombardment from both a Zn surface and a ZnS single crystal. Doppler-shifted spectroscopy in combination with time-of-flight, has also been employed to investigate Zn atoms ejected from a ZnS single crystal under irradiation by 308 nm photons (XeCl excimer laser). The absolute Zn sputtering yields from ion-bombarded and laser-irradiated ZnS samples were determined by comparison with LFS measurements of Zn atoms sputtered from pure Zn targets by Ar/sup /plus// ions since the absolute sputtering yield is known. For the Zn target the velocity distributions of the ion-induced sputtered Zn atoms were in good agreement with the Sigmund-Thompson distribution based on the known binding energy of 1.35 eV. On the other hand the velocity distribution of Zn atoms ion-sputtered from ZnS showed some deviation from the Sigmund-Thompson distribution and had a lower binding energy, /approximately/0.90 eV. The velocity distributions of the laser-ablated Zn atoms from ZnS were Maxwell-Boltzman in nature with characteristic temperatures increasing from 2000 to 9000 K at fluences of 20 and 80 mJ/cm/sup 2/, respectively. The absolute sputtering yield (Y) of Znmore » sputtered from ZnS was found to be Y /congruent/ 8.3 atoms/ion for ion sputtering and Y /congruent/ 10/sup /minus/6/ atoms/photon at a laser fluence of 30 mJ/cm/sup 2/ for laser ablation. High-resolution Doppler-shift techniques have been combined with TOF techniques. This promising combination permits unambiguous detection of prompt and delayed emission of ablated atoms, as well as the observation of possible molecular or cluster fragmentation. The results obtained indicate that no delayed emission is occurring and suggest the possibility of molecule or cluster emission from ZnS. 52 refs., 6 figs.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
6719553
Report Number(s):
UCRL-99509; CONF-881002-9
ON: DE88017015
DOE Contract Number:  
W-7405-ENG-48; W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 35. national vacuum symposium and 4th international laser science conference, Atlanta, GA, USA, 2 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ZINC; LASER RADIATION; ZINC SULFIDES; ARGON IONS; DOPPLER BROADENING; ELECTRONIC STRUCTURE; FLUORESCENCE SPECTROSCOPY; MONOCRYSTALS; PARTICLES; PHOTONS; SPECTRA; SPUTTERING; TIME-OF-FLIGHT METHOD; VELOCITY; CHALCOGENIDES; CHARGED PARTICLES; CRYSTALS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ELEMENTS; EMISSION SPECTROSCOPY; INORGANIC PHOSPHORS; IONS; LINE BROADENING; MASSLESS PARTICLES; METALS; PHOSPHORS; RADIATIONS; SPECTROSCOPY; SULFIDES; SULFUR COMPOUNDS; ZINC COMPOUNDS; 656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)

Citation Formats

Arlinghaus, H F, Calaway, W F, Young, C E, Pellin, M J, Gruen, D M, and Chase, L L. Analysis of ion-bombarded and laser-irradiated surfaces of ZnS and Zn via two-photon high-resolution laser-induced fluorescence spectroscopy. United States: N. p., 1988. Web.
Arlinghaus, H F, Calaway, W F, Young, C E, Pellin, M J, Gruen, D M, & Chase, L L. Analysis of ion-bombarded and laser-irradiated surfaces of ZnS and Zn via two-photon high-resolution laser-induced fluorescence spectroscopy. United States.
Arlinghaus, H F, Calaway, W F, Young, C E, Pellin, M J, Gruen, D M, and Chase, L L. 1988. "Analysis of ion-bombarded and laser-irradiated surfaces of ZnS and Zn via two-photon high-resolution laser-induced fluorescence spectroscopy". United States.
@article{osti_6719553,
title = {Analysis of ion-bombarded and laser-irradiated surfaces of ZnS and Zn via two-photon high-resolution laser-induced fluorescence spectroscopy},
author = {Arlinghaus, H F and Calaway, W F and Young, C E and Pellin, M J and Gruen, D M and Chase, L L},
abstractNote = {Doppler-shifted two-photon laser-induced fluorescence spectroscopy (LFS) has been used for the first time to measure the velocity distributions of Zn atoms ejected by Ar/sup /plus// ion bombardment from both a Zn surface and a ZnS single crystal. Doppler-shifted spectroscopy in combination with time-of-flight, has also been employed to investigate Zn atoms ejected from a ZnS single crystal under irradiation by 308 nm photons (XeCl excimer laser). The absolute Zn sputtering yields from ion-bombarded and laser-irradiated ZnS samples were determined by comparison with LFS measurements of Zn atoms sputtered from pure Zn targets by Ar/sup /plus// ions since the absolute sputtering yield is known. For the Zn target the velocity distributions of the ion-induced sputtered Zn atoms were in good agreement with the Sigmund-Thompson distribution based on the known binding energy of 1.35 eV. On the other hand the velocity distribution of Zn atoms ion-sputtered from ZnS showed some deviation from the Sigmund-Thompson distribution and had a lower binding energy, /approximately/0.90 eV. The velocity distributions of the laser-ablated Zn atoms from ZnS were Maxwell-Boltzman in nature with characteristic temperatures increasing from 2000 to 9000 K at fluences of 20 and 80 mJ/cm/sup 2/, respectively. The absolute sputtering yield (Y) of Zn sputtered from ZnS was found to be Y /congruent/ 8.3 atoms/ion for ion sputtering and Y /congruent/ 10/sup /minus/6/ atoms/photon at a laser fluence of 30 mJ/cm/sup 2/ for laser ablation. High-resolution Doppler-shift techniques have been combined with TOF techniques. This promising combination permits unambiguous detection of prompt and delayed emission of ablated atoms, as well as the observation of possible molecular or cluster fragmentation. The results obtained indicate that no delayed emission is occurring and suggest the possibility of molecule or cluster emission from ZnS. 52 refs., 6 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6719553}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {8}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: