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Dissociative ionization of ethanol by circularly-polarized ultrashort intense laser fields

Akagi, Hiroshi; Itakura, Ryuji; Hosaka, Koichi*; Yamanouchi, Kaoru; Yokoyama, Atsushi

When a molecule is exposed to circularly-polarized laser fields, dissociation processes following ionization proceed differently from the case of linearly polarization. In the present work, ethanol molecules are irradiated with a circularly-polarized intense laser field (I = 1.4$$times$$10$$^{13}$$ W/cm$$^{2}$$, $$lambda$$ $$sim$$800 nm), and the produced electron and ion are measured in coincidence. Under the present experimental conditions, Keldysh parameter $$gamma$$ is calculated to be 2.6, suggesting the multiphoton ionization is expected to be dominant. The relative yields of C$$_{2}$$H$$_{4}$$OH$$^{+}$$, CH$$_{2}$$OH$$^{+}$$, and C$$_{2}$$H$$_{5}$$C$$^{+}$$ with respect to the parent ion are 0.36, 0.31, and 0.01, which correspond to only 0.5, 0.4, and 0.2 of those for the linear polarization with similar laser field intensity (1.7$$times$$10$$^{13}$$ W/cm$$^{2}$$.

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English

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第26回化学反応討論会

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2010/06

Location (city)

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東広島

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日本

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no keyword

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Press Release

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Article of JAEA R&D Review

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- Accesses

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