Time-dependent depolarization of aligned HD molecules
| Autor: | Andrew J. Alexander, Nate C.-M. Bartlett, Daniel Miller, Dimitris Sofikitis, T. Peter Rakitzis, Richard N. Zare |
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| Rok vydání: | 2008 |
| Předmět: |
Coupling
Angular momentum Spins Spin polarization Proton Scattering Chemistry scattering reagents General Physics and Astronomy alignment Physics and Astronomy(all) orientation differential-cross-sections Total angular momentum quantum number cl product Atomic physics Physical and Theoretical Chemistry Spin (physics) |
| Zdroj: | Bartlett, N C M, Miller, D J, Zare, R N, Alexander, A J, Sofikitis, D & Rakitzis, T P 2009, ' Time-dependent depolarization of aligned HD molecules ', Physical chemistry chemical physics, vol. 11, no. 1, pp. 142-147 . https://doi.org/10.1039/b814133a |
| ISSN: | 1463-9076 |
| DOI: | 10.1039/b814133a |
| Popis: | An aligned sample of HD(v = 1, J = 2, M(J) = 0) molecules is prepared under collision-free conditions using the S(0) stimulated Raman pumping transition. Subsequent coupling to the spins of the deuteron I(D) and the proton I(H) causes the initial degree of alignment to oscillate and decrease as monitored over the time range from 0-13 mus via the O2 line of the [2 + 1] REMPI E,F(1)Sigma-X(1)Sigma (0,1) band. The time dependence of the rotational alignment is also calculated using both a hierarchical coupling scheme in which the rotational angular momentum J is regarded first to couple to I(D), and then the resultant F(i) to couple to I(H), to form the total angular momentum F and a non-hierarchical coupling scheme in which the HD energy level structure is not assumed to be diagonal in the |I(H)(JI(D))F(i)FM(F)basis set. The experimental data is in good agreement with the non-hierarchical calculation but not with the hierarchical calculation, as expected for this system. Additionally, we calculate the time dependence of the H and D nuclear spin polarizations. |
| Databáze: | OpenAIRE |
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