Acta Optica Sinica, Volume. 22, Issue 3, 272(2002)
Preparation and Detection of Angular Momentum Orientation and Alignment of Molecule
The angular momentum orientation and alignment in single rotational states of the IR inactive vibrational mode (v″=1) in the electronic ground state of acetylene (X 1∑ + g, v″ 2=1,J″) has been selectively prepared by using circularly and linearly polarized laser stimulated Raman pumping. From the induced electronic transition fluorescence spectra by a circularly and linearly polarized UV laser, A 1* A u(v″=1)←X 1∑ + g (v″ 2=1), the A (1) 0 (orientation) of C 2H 2 (X 1∑ + g, v″ 2=1,J″=4,7,8,9,10,11,12,13) are measured directly in the range between 0.7 and 0.8. The A (2) 0 (alignment) for J″=2,3,4,5,6,7,8,9,11 is -0.7~-0.9. This results show that the spatial population of angular momentum of C 2H 2 molecule before reactions can be controlled by this laser pumping technique.
Get Citation
Copy Citation Text
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Preparation and Detection of Angular Momentum Orientation and Alignment of Molecule[J]. Acta Optica Sinica, 2002, 22(3): 272