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Phys. Rev. A 82, 013421 (2010) [5 pages]

Nonlinear Fourier-transform spectroscopy of D2 using high-order harmonic radiation

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Yusuke Furukawa1, Yasuo Nabekawa1, Tomoya Okino1,2, Sébastien Saugout1,*, Kaoru Yamanouchi1,2, and Katsumi Midorikawa1,†
1Extreme Photonics Research Group, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
2Department of Chemistry, School of Science, the University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan

Received 18 December 2009; published 28 July 2010

We have determined the multiphoton ionization and dissociation pathways of D2 with the simultaneous irradiation of the high-order harmonic fields and the low-order harmonic fields of Ti:sapphire laser pulses in the visible-vacuum ultraviolet region with the aid of a nonlinear Fourier-transform spectroscopy. By analyzing the interferometric autocorrelation signal of the measured velocity map images of D+, we were able to decompose the measured momentum distribution into three momentum distribution images representing the three distinct dissociation pathways, which are sequentially two-photon absorption processes of D2 via the electronic ground state (X2Σg+) of D2+ to the first excited state (A2Σu+), leading to the dissociation into D+ + D.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.82.013421
DOI:
10.1103/PhysRevA.82.013421
PACS:
33.20.Xx, 33.80.Eh, 82.53.Kp

*Present address: Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-Sud 11, F-91405 Orsay Cedex, France.

kmidori@riken.jp