Angularly resolved rotationally inelastic scattering of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Na</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>-Ne: Comparison between experiment and theory

Jones, Patrick L.; Hefter, U.; Mattheus, A.; Witt, J.; Bergmann, K.; Müller, Wolfgang; Meyer, Wilfried; Schinke, Reinhard

doi:10.1103/physreva.26.1283

Cited by 84 publications

(16 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparison with data on Na2~rare-gas collisions by Bergmann and co-workers [14] indicates that our DCS values peak at somewhat lower values than those shown in Ref. [14]. This is not surprising since the work cited on Na2 was performed on the ground state of that molecule and our results are for the Li2 A 1 !!…”

Section: The Final Velocity Component Distribution P V Xf (Vzf\v Z )supporting

confidence: 62%

See 1 more Smart Citation

Spectroscopic determination of the state-to-state differential cross section by velocity selected double resonance

et al. 1993

View full text Add to dashboard Cite

We have measured the state-to-state differential scattering cross section (DCS) for a rotationally inelastic process using an entirely spectroscopic method. The system studied was Li2(A 1 Sj)-Xe and the method utilizes two color sub-Doppler double resonance. Analysis of the shape of the double resonance line yields the final distribution of relative velocity vectors. This represents the first measurement of a state-to-state DCS using thermal cell spectroscopy In addition we have determined, also for the first time, the dependence of the state-to-state DCS on initial relative velocity. Results are presented for the Aj = 6 rotationally inelastic process.PACS numbers: 34.50.Ez, 33.70.Jg Scattering cross sections differential in angle are generally measured by molecular beam methods. In molecular scattering, quantum state selection and detection are an essential prerequisite to meaningful analysis of the data and such enhancements add greatly to the cost and complexity of the experiment. An alternative approach is through Doppler-resolved double resonance spectroscopy [1,2] which may be performed in simple collision cells.Here we demonstrate that velocity selected double resonance (VSDR) may be used to give state-to-state cross sections for atom-molecule rotationally inelastic collisions that are differential in angle and relative velocity. These are the first purely spectroscopic measurements of such quantities for inelastic processes in molecules.That information on angular distributions is contained in double resonance line shapes of atoms in thermal cells was first pointed out by Berman [3]. Gottscho et al.[4] extended this to rotationally inelastic collisions of molecules and determined energy averaged, most probable scattering angles for BaO colliding with argon. Of relevance are the experiments of Kinsey, Pritchard, and coworkers [5,6] who developed laser methods to determine velocity distributions, the velocity selection by Doppler shift method of Smith et al [7,8], and most recently, a fully polarization-resolved, four-vector experiment by Collins, McCaffery, and Wynn [9]. Alternative treat-Coherent 699-29 Coherent Innova 100 PC i Control 3392 LZJ FIG. 1. Velocity selected double resonance experimental setup.

show abstract

Section: The Final Velocity Component Distribution P V Xf (Vzf\v Z )supporting

confidence: 62%

“…Comparison with data on Na2~rare-gas collisions by Bergmann and co-workers [14] indicates that our DCS values peak at somewhat lower values than those shown in Ref. [14].…”

Section: The Final Velocity Component Distribution P V Xf (Vzf\v Z )supporting

confidence: 46%

Spectroscopic determination of the state-to-state differential cross section by velocity selected double resonance

et al. 1993

View full text Add to dashboard Cite

show abstract

“…(For a review of current theoretical and experimental progress see Schinke and Bowman [1].) Most of the studies, however, employ the infinite order sudden (IOS) approximation [-4] in quantum I- [4][5][6][7], classical [-8-10] and semiclassical 1-10-11] mechanics. The most widely studied collisions are sudden, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The rotational rainbow phenomena are directly related to the anisotropy of the potential; they arise from an interference of classical trajectories (typically two) with the same scattering angle and angular momentum transfer, but different orientations of the molecule. In other words, the orientation angle 7 of the target molecule is frozen during the collision and the trajectory of the scattered atom is approximated by a trajectory in a spherically symmetric potential V(R, 7) with fixed parameter 7-The typical rotational rainbow structure of the j---~j' differential cross sections under sudden conditions can be considered as well understood for initially nonrotating (/=0) molecules with purely repulsive interactions: The classical cross sections show a rainbow (square root) singularity at the maximum allowed final rotational momentum at each scattering angle, which is quantum mechanically softened into a maximum accompanied by a series of maxima (supernumerary rainbows) on the classically allowed ('bright') side. characterized by short collision times, negligible energy transfer and steep repulsive potentials.…”

Section: Introductionmentioning

confidence: 99%

“…characterized by short collision times, negligible energy transfer and steep repulsive potentials. Despite the fact, that such situations are quite often met in experiments (see for instance [6,7]) there are comparatively few theoretical studies of the typical structural features of the corresponding cross sections. Most of the studies, however, employ the infinite order sudden (IOS) approximation [-4] in quantum I- [4][5][6][7], classical [-8-10] and semiclassical 1-10-11] mechanics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation