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Spin-Polarized Hydrogen Atoms from Molecular Photodissociation

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Science  20 Jun 2003:
Vol. 300, Issue 5627, pp. 1936-1938
DOI: 10.1126/science.1084809

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Abstract

The production of spin-polarized hydrogen atoms from the photodissociation of hydrogen chloride with circularly polarized 193-nanometer light is inferred from the measurement of the complete angular momentum distributions of ground state Cl(2P3/2)and excited state Cl(2P1/2)cofragments by slice imaging. The experimentally measured and ab initio predicted Embedded Image (p)parameters, which describe the single-surface and multiple-surface-interference contributions to the angular momentum distributions, are in excellent agreement. For laser pulses longer than about 0.7 ns, the polarization of the electron and the proton are both 36%.

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