Rotational dynamics and electronic energy partitioning in the electron-stimulated desorption of NO from Pt(111)

A. R. Burns, Ellen Stechel, D. R. Jennison

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Using laser resonance ionization, we have examined the rotational dynamics of neutral NO molecules desorbed by electron impact from a cold (80 K) Pt(111) surface. Previously [A. R. Burns, E. B. Steehel and D. R. Jennison, Phys. Rev. Lett. 58, 250 (1987) ], we observed “hot” rotational temperatures in the range 481–642 K for the v = 0, 1,2, and 3 vibrational levels. We now present more detailed data which do not reveal shifts or broadening in the rotationally selected NO velocity distributions as a function of rotational level J in the range = J — 2.5-29.5. The rotationally independent velocity distributions, peaked at 0.05 eV, as well as the rotational temperature can be understood within the framework of “electronically stimulated adsorbate rotation” (Burns et al> above). The model also predicts complete rotational alignment in a plane normal to the surface. In the laboratory, no alignment is observed, but this is most likely due to the presence of stray magnetic fields. We will also discuss our measurements which show an equal partitioning between the two lowest NO electronic states (2II l/2and 2n3/2)» and a preference for the it level which is perpendicular (antisymmetric) to the plane of rotation.

Original languageEnglish
Pages (from-to)895-898
Number of pages4
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume6
Issue number3
DOIs
Publication statusPublished - 1988

Fingerprint

Velocity distribution
Desorption
desorption
Electrons
Electronic states
Adsorbates
velocity distribution
alignment
electronics
Ionization
electrons
Magnetic fields
Temperature
electron impact
Molecules
energy
Lasers
ionization
temperature
shift

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

@article{0fbfb910f1254f26ae6a08e8bceba1db,
title = "Rotational dynamics and electronic energy partitioning in the electron-stimulated desorption of NO from Pt(111)",
abstract = "Using laser resonance ionization, we have examined the rotational dynamics of neutral NO molecules desorbed by electron impact from a cold (80 K) Pt(111) surface. Previously [A. R. Burns, E. B. Steehel and D. R. Jennison, Phys. Rev. Lett. 58, 250 (1987) ], we observed “hot” rotational temperatures in the range 481–642 K for the v = 0, 1,2, and 3 vibrational levels. We now present more detailed data which do not reveal shifts or broadening in the rotationally selected NO velocity distributions as a function of rotational level J in the range = J — 2.5-29.5. The rotationally independent velocity distributions, peaked at 0.05 eV, as well as the rotational temperature can be understood within the framework of “electronically stimulated adsorbate rotation” (Burns et al> above). The model also predicts complete rotational alignment in a plane normal to the surface. In the laboratory, no alignment is observed, but this is most likely due to the presence of stray magnetic fields. We will also discuss our measurements which show an equal partitioning between the two lowest NO electronic states (2II l/2and 2n3/2)» and a preference for the it level which is perpendicular (antisymmetric) to the plane of rotation.",
author = "Burns, {A. R.} and Ellen Stechel and Jennison, {D. R.}",
year = "1988",
doi = "10.1116/1.575070",
language = "English",
volume = "6",
pages = "895--898",
journal = "Journal of Vacuum Science and Technology A",
issn = "0734-2101",
publisher = "AVS Science and Technology Society",
number = "3",

}

TY - JOUR

T1 - Rotational dynamics and electronic energy partitioning in the electron-stimulated desorption of NO from Pt(111)

AU - Burns, A. R.

AU - Stechel, Ellen

AU - Jennison, D. R.

PY - 1988

Y1 - 1988

N2 - Using laser resonance ionization, we have examined the rotational dynamics of neutral NO molecules desorbed by electron impact from a cold (80 K) Pt(111) surface. Previously [A. R. Burns, E. B. Steehel and D. R. Jennison, Phys. Rev. Lett. 58, 250 (1987) ], we observed “hot” rotational temperatures in the range 481–642 K for the v = 0, 1,2, and 3 vibrational levels. We now present more detailed data which do not reveal shifts or broadening in the rotationally selected NO velocity distributions as a function of rotational level J in the range = J — 2.5-29.5. The rotationally independent velocity distributions, peaked at 0.05 eV, as well as the rotational temperature can be understood within the framework of “electronically stimulated adsorbate rotation” (Burns et al> above). The model also predicts complete rotational alignment in a plane normal to the surface. In the laboratory, no alignment is observed, but this is most likely due to the presence of stray magnetic fields. We will also discuss our measurements which show an equal partitioning between the two lowest NO electronic states (2II l/2and 2n3/2)» and a preference for the it level which is perpendicular (antisymmetric) to the plane of rotation.

AB - Using laser resonance ionization, we have examined the rotational dynamics of neutral NO molecules desorbed by electron impact from a cold (80 K) Pt(111) surface. Previously [A. R. Burns, E. B. Steehel and D. R. Jennison, Phys. Rev. Lett. 58, 250 (1987) ], we observed “hot” rotational temperatures in the range 481–642 K for the v = 0, 1,2, and 3 vibrational levels. We now present more detailed data which do not reveal shifts or broadening in the rotationally selected NO velocity distributions as a function of rotational level J in the range = J — 2.5-29.5. The rotationally independent velocity distributions, peaked at 0.05 eV, as well as the rotational temperature can be understood within the framework of “electronically stimulated adsorbate rotation” (Burns et al> above). The model also predicts complete rotational alignment in a plane normal to the surface. In the laboratory, no alignment is observed, but this is most likely due to the presence of stray magnetic fields. We will also discuss our measurements which show an equal partitioning between the two lowest NO electronic states (2II l/2and 2n3/2)» and a preference for the it level which is perpendicular (antisymmetric) to the plane of rotation.

UR - http://www.scopus.com/inward/record.url?scp=0005397367&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0005397367&partnerID=8YFLogxK

U2 - 10.1116/1.575070

DO - 10.1116/1.575070

M3 - Article

AN - SCOPUS:0005397367

VL - 6

SP - 895

EP - 898

JO - Journal of Vacuum Science and Technology A

JF - Journal of Vacuum Science and Technology A

SN - 0734-2101

IS - 3

ER -