Laser preparation of polarized nuclei: Absorption of one polarized photon is enough and no high spectral resolution is needed to achieve 100% polarization |
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Authors: | S.K. Sekatskii |
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Affiliation: | 1. Laboratoire de Physique de la Matière Vivante, IPMC, Ecole Polytechnique Fédérale de Lausanne, BSP, CH-1015 Lausanne, Switzerland;2. Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region, 142190 Russia |
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Abstract: | A new method to prepare photoions with the polarized nuclear spin is proposed. Selected total electron momentum state |J,mJ〉 is excited by short (pico- or (sub)nanosecond) spectrally broad laser pulse which does not resolve a hyperfine structure thus preparing a superposition of all sublevels of the total angular momentum F of an atom. Initially unpolarized nuclear spin state becomes highly polarized in a course of subsequent free quantum evolution, and at appropriate time an atom is ionized by another short laser pulse. For the case of nuclear spin I=1/2, absorption of only one polarized photon is needed to achieve 100% nuclear polarization. |
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Keywords: | 32.80.Fb 32.10.Fn |
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