Gas-phase reaction dynamics : from billiard balls to geometric phase in H + H2
Abstract/Contents
- Abstract
- Hydrogen exchange reaction, the simplest chemical transformation, has been studied experimentally by measuring the angular distributions of the H + H2 → H2(v', j') + H reaction products, that were detected with v' and j' state specificity. Although the expected behavior is observed -- wherein the H2 products scatter into a more sideway direction with increasing rotational excitation of the hydrogen product -- we have also uncovered a previously unseen trend, wherein the H2 reaction products scatter into a more backward direction with increasing j', i.e. the opposite behavior to the expected one! In addition, certain rotationally cold products of the H + D2 → HD(v' = 2, j' = 0) + D reaction at a center-of-mass collision energy of 1.25 eV are forward-scattered due to a time-delayed mechanism. Finally, an attempt has been made to measure the theoretically predicted Geometric Phase effects in the H3 system. To this end, a reaction where 'nothing happens' has been studied, namely H + HD → HD(v', j') + H, because the sole Geometric Phase effect is to change the sign in front of the oscillatory term that describes the interference between the experimentally indistinguishable reactive and inelastic scattering pathways. Fine out-of-phase oscillations calculated theoretically have turned out to be beyond the experimental resolution.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2013 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Jankunas, Justin |
|---|---|
| Associated with | Stanford University, Department of Chemistry. |
| Primary advisor | Zare, Richard N |
| Thesis advisor | Zare, Richard N |
| Thesis advisor | Martinez, Todd J. (Todd Joseph), 1968- |
| Thesis advisor | Pecora, Robert, 1938- |
| Advisor | Martinez, Todd J. (Todd Joseph), 1968- |
| Advisor | Pecora, Robert, 1938- |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Justin Jankunas. |
|---|---|
| Note | Submitted to the Department of Chemistry. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2013. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2013 by Justinas Jankunas
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