Sofikitis Dimitris, Kannis Chrysovalantis S, Boulogiannis Gregoris K, Katsoprinakis Georgios E, Rakitzis T Peter
Department of Physics, University of Crete, 71003 Heraklion-Crete, Greece and Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece.
Phys Chem Chem Phys. 2019 Jul 14;21(26):14000-14004. doi: 10.1039/c8cp07079b. Epub 2019 Jan 3.
We report the electron-spin polarization of D atoms from the photodissociation of DI, at 213 nm and 266 nm, by measuring the magnetization quantum beats of the D atoms with a pick-up coil. We determine that the polarization P is large at both wavelengths (|P|∼ 1), however it is positive at 213 nm, and negative at 266 nm. These results, in both cases, are of opposite sign to calculations, which assume adiabatic dissociation along the AΠ or aΠ states. We interpret these results as evidence that nonadiabatic coupling between these states needs to be included for the theoretical treatment of DI photodissociation.
我们通过用拾取线圈测量D原子的磁化量子拍频，报道了在213纳米和266纳米波长下，DI光解离产生的D原子的电子自旋极化。我们确定在这两个波长下极化P都很大（|P| ∼ 1），然而在213纳米时为正，在266纳米时为负。在这两种情况下，这些结果与沿AΠ或aΠ态进行绝热解离假设的计算结果符号相反。我们将这些结果解释为证据，表明在DI光解离的理论处理中需要考虑这些态之间的非绝热耦合。
