Mechanisms of surface chemiluminescence excitation accounting for nonequilibrium desorption and diffusion

V. P. Grankin, Yu I. Tyurin

Research output: Contribution to journalArticle

Abstract

Based on the results obtained on a device with molecular beams we propose the mechanism for excitation of heterogeneous chemiluminescence (HCL) on the ZnS-Tm and CaO-Bi surfaces, which takes into account nonequilibrium emission of activator ions into the vacuum during recombination of hydrogen atoms, diffusion of luminescent centers from the bulk to the surface, and aging of specimens in the course of the experiment. The formation and relaxation of strongly excited oscillating states on the surface and their participation in luminescent center excitation and nonequilibrium desorption are also considered. The kinetics of HCL are found to be related to the variations in the quantum yield of atomic recombination rather than to dynamic blocking of the surface. It is shown that auto-oscillations of the HCL intensity result from a nonequilibrium energy exchange between excited and unexcited admolecules.

Original languageEnglish
Pages (from-to)843-856
Number of pages14
JournalPhysics, chemistry and mechanics of surfaces
Volume11
Issue number7-8
Publication statusPublished - 1 Dec 1995

Fingerprint

Chemiluminescence
Desorption
Molecular beams
Quantum yield
Aging of materials
Vacuum
Atoms
Hydrogen
Kinetics
Ions
Experiments

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Mechanisms of surface chemiluminescence excitation accounting for nonequilibrium desorption and diffusion. / Grankin, V. P.; Tyurin, Yu I.

In: Physics, chemistry and mechanics of surfaces, Vol. 11, No. 7-8, 01.12.1995, p. 843-856.

Research output: Contribution to journalArticle

@article{d6a566ddaa5448aab103d2a4185b3382,
title = "Mechanisms of surface chemiluminescence excitation accounting for nonequilibrium desorption and diffusion",
abstract = "Based on the results obtained on a device with molecular beams we propose the mechanism for excitation of heterogeneous chemiluminescence (HCL) on the ZnS-Tm and CaO-Bi surfaces, which takes into account nonequilibrium emission of activator ions into the vacuum during recombination of hydrogen atoms, diffusion of luminescent centers from the bulk to the surface, and aging of specimens in the course of the experiment. The formation and relaxation of strongly excited oscillating states on the surface and their participation in luminescent center excitation and nonequilibrium desorption are also considered. The kinetics of HCL are found to be related to the variations in the quantum yield of atomic recombination rather than to dynamic blocking of the surface. It is shown that auto-oscillations of the HCL intensity result from a nonequilibrium energy exchange between excited and unexcited admolecules.",
author = "Grankin, {V. P.} and Tyurin, {Yu I.}",
year = "1995",
month = "12",
day = "1",
language = "English",
volume = "11",
pages = "843--856",
journal = "Physics, chemistry and mechanics of surfaces",
issn = "0734-1520",
publisher = "Gordon and Breach Science Publishers",
number = "7-8",

}

TY - JOUR

T1 - Mechanisms of surface chemiluminescence excitation accounting for nonequilibrium desorption and diffusion

AU - Grankin, V. P.

AU - Tyurin, Yu I.

PY - 1995/12/1

Y1 - 1995/12/1

N2 - Based on the results obtained on a device with molecular beams we propose the mechanism for excitation of heterogeneous chemiluminescence (HCL) on the ZnS-Tm and CaO-Bi surfaces, which takes into account nonequilibrium emission of activator ions into the vacuum during recombination of hydrogen atoms, diffusion of luminescent centers from the bulk to the surface, and aging of specimens in the course of the experiment. The formation and relaxation of strongly excited oscillating states on the surface and their participation in luminescent center excitation and nonequilibrium desorption are also considered. The kinetics of HCL are found to be related to the variations in the quantum yield of atomic recombination rather than to dynamic blocking of the surface. It is shown that auto-oscillations of the HCL intensity result from a nonequilibrium energy exchange between excited and unexcited admolecules.

AB - Based on the results obtained on a device with molecular beams we propose the mechanism for excitation of heterogeneous chemiluminescence (HCL) on the ZnS-Tm and CaO-Bi surfaces, which takes into account nonequilibrium emission of activator ions into the vacuum during recombination of hydrogen atoms, diffusion of luminescent centers from the bulk to the surface, and aging of specimens in the course of the experiment. The formation and relaxation of strongly excited oscillating states on the surface and their participation in luminescent center excitation and nonequilibrium desorption are also considered. The kinetics of HCL are found to be related to the variations in the quantum yield of atomic recombination rather than to dynamic blocking of the surface. It is shown that auto-oscillations of the HCL intensity result from a nonequilibrium energy exchange between excited and unexcited admolecules.

UR - http://www.scopus.com/inward/record.url?scp=0029676072&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029676072&partnerID=8YFLogxK

M3 - Article

VL - 11

SP - 843

EP - 856

JO - Physics, chemistry and mechanics of surfaces

JF - Physics, chemistry and mechanics of surfaces

SN - 0734-1520

IS - 7-8

ER -