Session J28 - Quantum Optics and Strong Field Physics.
ORAL session, Tuesday midday, March 23
516E, Palais des Congres
Spin polarization of ions and electrons plays an important role in the fields of surface physics, atomic and molecular physics, and high-energy physics, in particular, for the study of spin related characteristics. When gas phase atoms are ionized by multi-photon ionization process, the degrees of spin polarization of photoions and photoelectrons are the same if all of the produced photoions are in the s state [1]. We have achieved the degree of electron-spin polarization of Sr^+ ions as large as 64% by ionizing Sr atoms through one-photon resonant two-photon pulsed laser ionization via 5s5p ^3P_1 (M_J=+1) state [2,3]. In other words, we have produced 64% electron-spin polarized photoions and photoelectrons simultaneously. The degree of electron-spin polarization is measured at three different wavelengths (308nm, 266nm, 248nm) for the ionization laser.
[1] T. Nakajima et. al. J. Chem. Phys., 117, 2112 (2002). [2] T. Nakajima et. al., Appl. Phys. Lett. 83, 2103 (2003) [3] N. Yonekura et. al., J. Chem. Phys. in press.