𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Molecular beam scattering studies of the reaction D + H2 (v = 0) and D + H2 (v = 1) → HD + H

✍ Scribed by R. Goetting; J. P. Toennies; M. Vodegel

Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
507 KB
Volume
18
Category
Article
ISSN
0538-8066

No coin nor oath required. For personal study only.

✦ Synopsis

The reaction D + H2 + HD + H has been investigated in two molecular beam scattering experiments. Angular and time-of-flight distributions have been measured for the initial vibrational ground state ( u = 0) at a most probable collision energy of E,, = 1.5 eV and for the first vibrational excited state ( u = 1 ) a t E,, = 0.28 eV with the same apparatus. Results for the ground-state experiment are compared with quasiclassical trajectory calculations (QCT) on the LsTH-hypersurface transformed into the laboratory system and averaged over the apparatus distributions. The agreement is quite satisfactory. At this high collision energy the HD products are no longer scattered in a backward direction but in a wide-angular region concentrated about 0 = 90" in the center-of-mass system. The absolute reactive cross section has been determined and the agreement with the theoretical value from QCT calculations is within the experimental error. The high sensitivity of the experiment to different properties of the doubly differential cross section has also been demonstrated. A preliminary evaluation of the experiment with initial vibrational excitation ( u = 1) shows that the HD-product molecules are preferably backward scattered and the change of internal energy is small supporting the concept of a reaction which is adiabatic with respect to the internal degrees of freedom.

📜 SIMILAR VOLUMES

Determination of the absolute scattering
Determination of the absolute scattering cross section for the reaction D + H2(v=1) → HD+H at 0.33 eV
✍ R. Götting; V. Herrero; J.P. Toennies; M. Vodegel 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 749 KB

The reaction D+ H2( v= I ) has been investigated in a crossed molecular beam experiment at the most probable collision energy of&=0.33 eV. Angular and time-of-flight distributions have been measured and the total absolute cross section has been determined to be a&, = 0, v= 1, EC ,,,. = 0.33 eV) = 1.

The temperature dependence of the reacti
The temperature dependence of the reactions H2(v = 1) + D, H
✍ V.B. Rozenshtein; Yu.M. Gershenzon; A.V. Ivanov; S.D. Il'in; S.I. Kucheryavii; S 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 339 KB

The lempernwre dependence OT the raw constant for the rcacrions H2( L: -l)+D and H2(u =l)+H was smdied using a flow-lube method combined with EPR and lhermome[ric techniques. The rale cons~an~s (in cm3/molecule s) were round LO be ## k~=(2.3~1.3)x10-'0exp[-(32W~6DO)/RT ]. ~~=(1~0\_5)X10~'"exp[-(3

State-resolved differential cross sectio
State-resolved differential cross sections for the H+D2 (v=0, j) → HD(v′, j′)+D reaction from quasiclassical trajectory calculations
✍ F.J. Aoiz; V.J. Herrero; O. Puentedura; V. Sáez Rábanos 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 567 KB

Integral and differential state-resolved cross sections have been calculated by the method of quasiclassical trajectories for the H t D,+HD+D reaction in the range of initial conditions of interest to recent experiments. When possible, the results are compared to exact quantum-mechanical calculation

Integral rate constant measurements of t
Integral rate constant measurements of the reaction H + D2 → HD (v′ = 1, j′) + D at high collision energies
✍ D.E. Adelman; H. Xu; R.N. Zare 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 430 KB

The reaction H+Da+HD( u'= 1, j') t D was studied using two different experimental geometries: (1) a probe-laser-induced reaction geometry and (2) an independent-photolysis laser geometry. High-energy H atoms were generated by photolysis of HI which resulted in center-of-mass collision energies of 2.

Experimental study of the D + H2 (v = 1)
Experimental study of the D + H2 (v = 1) reaction by CARS spectroscopy
✍ T. Dreier; J. Wolfrum 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 661 KB

The reactions D + Hz (u = 0 , l ) -+ HD (u = 0 , l ) + H have been studied in a discharge flow reactor by CARS-spectroscopy. For Hz(u = 0 ) molecules a rate constant of (4,O ? 1,O) cm3 s-l is obtained at 310 K from measured HD ( u = 0 , l ) product yields. Keeping the degree of vibrational excitatio