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Experimental study of the vibrational relaxation of ortho and para-H2 in collisions with 4He in the range 300–50 K

✍ Scribed by Marie-Martine Audibert; Ramon Vilaseca; Jacques Lukasik; Jacques Ducuing


Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
420 KB
Volume
37
Category
Article
ISSN
0009-2614

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✦ Synopsis


The vibrational relaxation of ortho-para-Hz in collisions with 4He has been studied in the interval 300-50 K. At 300 K the ortho Hz -He and para Hz-He rates are identical within experimental error. In the low temperature range ko~z_~e


📜 SIMILAR VOLUMES


Vibrational relaxation of ortho and para
✍ Marie-Martine Audibert; Ramon Vilaseca; Jacques Lukasik; Jacques Ducuing 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 476 KB

The.viirational r&xation of ortho-para-H2 mixtures :vas studied in the interval 400-50 K. At and above 300 K the ortho and para self-relaxation rates, .koo and kpb, tie identical within experimental error. In the low temgerature range, .koo > kpP and k,, is found to vary slowly with temperature.

Theoretical study of the low-temperature
✍ Millard H. Alexander 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 473 KB

Cross secfiws and rate constants for the vibrat$onal Maxation of H&J = I,i= I) in collisions with 4He were determined using the coupled states method with a fulIy-converged channel basis. The interaction potential was taken to be that of Gordon and Secrest with the elastic matrix elements modified t

Cross sections and rate constants for th
✍ Millard H. Alexander 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 525 KB

Fully converged quantum cross sections for 4He-D2 (u= l,i=O) vibrational reliaxation were determined using the coupled-states method and a modikied version of the Gordon-Secrcst surface. First-order forbidden rotational transitions play a si@fkant role, comparable to that observed previously for the

Vibrational deactivation of N2(v = 1) BY
✍ D.C. Allen; E.T. Chandler; E.A. Gregory; R.M. Siddles; C.J.S.M. Simpson 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 565 KB

## Rate constants for the deacrivarion of N,(u= 1) by n-H, and by PHI between 300 and 80 K have ken measured using laser fluorescence from CO(u= 1). There is no n-HZ/p-Hz difference. N,(v=l) is deactivated about 3 times more slowly than is CO(u = 1). Comparison with results in liquid N, support t

Information theoretic analysis of the ro
✍ Millard H. Alexander 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 375 KB

The information theoretic approach is used to analyse a series of quantum cross sections for the &-excitation of the n = 1 level of Hz and D2 by collisions with Li' and He. Surprisa! plots of the ratio of computed to prior cross sections show significant deviations from linearity over a wide range o