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Title: Measurements and Quasi-Quantum Modeling of the Steric Asymmetry and Parity Propensities in State-to-State Rotationally Inelastic Scattering of NO (2Π1/2) with D2

Journal Article · · Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
DOI:https://doi.org/10.1021/jp0712405· OSTI ID:1426986
 [1];  [2];  [3];  [3]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Combustion Research Facility
  2. FOM Inst. AMOLF, Amsterdam (Netherlands)
  3. Vrije Univ., Amsterdam (Netherlands). Laser Centre. Dept. of Physical Chemistry. Faculty of Exact Sciences

In this paper, relative integrated cross sections are measured for spin-orbit-conserving, rotationally inelastic scattering of NO (2Π1/2), hexapole-selected in the upper Λ-doublet level of the ground rotational state (j = 0.5), in collisions with D2 at a nominal energy of 551 cm-1. The final state of the NO molecule is detected by laser-induced fluorescence (LIF). The state-selected NO molecule is oriented with either the N end or the O end toward the incoming D2 molecule by application of a static electric field E in the scattering region. This field is directed parallel or antiparallel to the relative velocity vector v. Comparison of signals taken for the different applied field directions gives the experimental steric asymmetry SA, defined by SA = (σv↑↓E - σv↑↑E)/(σv↑↓E + σv↑↑E), which is equal to within a factor of -1 to the molecular steric effect, Si→f ≡ (σD2→NO - σD2→ON)/(σD2→NO + σD2→ON). The dependence of the integral inelastic cross section on the incoming Λ-doublet component is also measured as a function of the final rotational (jfinal) and Λ-doublet (εfinal) state. The measured steric asymmetries are similar to those previously observed for NO-He scattering. Spin-orbit manifold-conserving collisions exhibit a larger propensity for parity conservation than their NO-He counterparts. The results are interpreted in the context of the recently developed quasi-quantum treatment (QQT) of rotationally inelastic scattering. The QQT predictions can be inverted to obtain a fitted hard-shell potential that reproduces the experimental steric asymmetry; this fitted potential gives an empirical estimate of the anisotropy of the repulsive interaction between NO and D2. Finally, QQT computation of the differential cross section using this simple model potential shows reasonable agreement with the measured differential cross sections.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Vrije Univ., Amsterdam (Netherlands)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); Netherlands Organization for Scientific Research (NWO)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1426986
Report Number(s):
SAND2007-0694J; 524119
Journal Information:
Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Vol. 111, Issue 31; ISSN 1089-5639
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (34)

State-resolved rotationally inelastic collisions of highly rotationally excited CN(A 2Π) with helium: Influence of the interaction potential journal November 2001
Reactive scattering with a state selected beam: the influence of the internal state and orientation of no upon the chemilum1nescent reactivity with O3 journal November 1980
Observation of steric effects in gas–surface scattering journal August 1988
Direct spectroscopic determination of the degree of orientation of parity-selected NO journal September 1998
Steric asymmetry in rotationally inelastic state-resolved NOAr collisions journal October 1996
Steric asymmetry in state-resolved NO–Ar collisions journal November 1999
Direct inelastic scattering of oriented NO from Ag(111) and Pt(111) journal April 1991
State-to-State Scattering of Oriented OH journal October 1997
Steric asymmetry and lambda-doublet propensities in state-to-state rotationally inelastic scattering of NO(2Π1/2) with He journal December 2004
Investigation of steric effects in inelastic collisions of NO(X 2Π) with Ar journal May 2000
Sign of the state-to-state steric asymmetry of rotationally inelastic atom–molecule collisions journal June 2004
Quantum Interference as the Source of Steric Asymmetry and Parity Propensity Rules in NO−Rare Gas Inelastic Scattering journal July 2006
What is Wrong with the Steric Asymmetry in Atom-Molecule Collisions? journal January 2005
Theoretical dipole moment for the X 2Π state of NO journal July 1994
Totale effektive Streuquerschnitte für die Streuung von He, HD und D2 an verschiedenen Molekülen journal February 1971
Differential cross sections for rotationally inelastic scattering of NO from He and D2 journal February 2001
Differential cross sections for collisions of hexapole state-selected NO with He journal December 2005
Parity-dependent rotational rainbows in D2–NO and He–NO differential collision cross sections journal October 2006
Parity-Resolved Rotationally Inelastic Collisions of Hexapole State-Selected NO (2.PI.1/2, J = 1/2-) with Ar journal October 1995
Ion imaging measurement of collision-induced rotational alignment in Ar-NO scattering journal October 2001
Electronic fine structure transitions and rotational energy transfer of NO( X2 Π) in collisions with He: A counterpropagating beam study journal February 1995
REMPI detection of alignment in NO collisions journal June 2004
Polarization and steric effects in inelastic collisions of NO(X 2Π) with Ar and He journal January 1999
A simple kinetic theory model of reactive collisions of rigid nonspherical molecules journal March 1985
A simple kinetic theory model of reactive collisions. II. Nonrigid spherical potential with angle‐dependent reactivity journal February 1986
Collision Integrals of a Gas of Rigid Convex Molecules journal June 1969
The kinematic apse and j z ‐preserving propensities for nonreactive, dissociative, and reactive polyatomic collisions journal January 1984
Quantum mechanical close coupling approach to molecular collisions. j z ‐conserving coupled states approximation journal March 1974
A new, fully ab initio investigation of the NO(X 2Π)Ar system. I. Potential energy surfaces and inelastic scattering journal October 1999
Ab initio potential-energy surface for the He(1S)+NO(X 2Π) interaction and bound rovibrational states journal February 2000
State-to-state differential cross sections for spin–multiplet-changing collisions of NO(X 2Π1/2) with argon journal October 2002
Fully State-Resolved Differential Cross Sections for the Inelastic Scattering of the Open-Shell NO Molecule by Ar journal October 2001
Rotational rainbow scattering from an off-center rigid shell model journal July 1981
Ab initio potential energy surfaces and quantum scattering studies of NO( X2 Π) with He: Λ‐doublet resolved rotational and electronic fine‐structure transitions journal October 1995

Cited By (5)

Cold heteromolecular dipolar collisions journal January 2011
Cold heteromolecular dipolar collisions text January 2010
A new perspective: imaging the stereochemistry of molecular collisions journal January 2015
Stereodynamics in NO(X) + Ar inelastic collisions journal June 2016
Parity-Dependent Rotational Energy Transfer in CN(A2Π, ν = 4, j F1ε) + N2, O2, and CO2 Collisions journal March 2014

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