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

Journal Article · Mon May 01 04:00:00 EDT 1989 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.576043· OSTI ID:6183564

Arlinghaus, H F; Calaway, W F; Young, C E; Pellin, M J; Gruen, D M; Chase, L L

Doppler-shifted two-photon laser-induced fluorescence spectroscopy (LFS) has been used to measure the velocity distributions of Zn atoms ejected by Ar/sup +/ ion bombardment from both a Zn surface and a ZnS single crystal. Doppler-shifted spectroscopy in combination with time of flight(TOF), 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 +/ 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, /similar to/0.9 eV. The velocity distributions of the laser-ablated Zn atoms from ZnS were Maxwell--Boltzmann 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 Yapprox. =8 atoms/ion for ion sputtering and Yapprox. =10/sup -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.

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 6183564
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 7:3; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
360206 -- Ceramics
Cermets
& Refractories-- Radiation Effects
ARGON 40 BEAMS
ARGON IONS
BEAMS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL BONDS
CRYSTALS
DATA
ELEMENTS
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
INFORMATION
INORGANIC PHOSPHORS
ION BEAMS
IONS
METALS
MONOCRYSTALS
NUMERICAL DATA
PHOSPHORS
SPECTROSCOPY
SPUTTERING
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
ZINC
ZINC COMPOUNDS
ZINC SULFIDES