Hyper-differential study of the full fragmentation of the D_2 molecule by a single photon

Th. WEBER, A. CZACH, O. JAGUTZKI, A. MÜLLER, V. MERGEL, H. SCHMIDT-BÖCKING, R. DÖRNER
(IKF U. Frankfurt),

E. ROTENBERG, G. MEIGS, S. DAVEAU, M. H. PRIOR
(Lawrence Berkeley Nat. Lab.),

A. L. LANDERS
(Auburn U.),

C. L. COCKE, T. OSIPOV
(Kansas State U.),

A. KHEIFETS
(Australian Nat. U., Canberra),

J. FEAGIN
(Calif. State U-Fullerton.)

We report the first kinematically complete measurements of the four-body fragmentation of the D_2 molecule following absorption of a single photon. For two equal energy electrons and a photon energy of 75.5 eV, we observe the relaxation of one selection rule valid for He photo double ionization and a strong dependence of the electron angular distribution on the orientation of the molecular axis. The results also reveal that the electron motion is strongly dependent on the inter-nuclear separation at the instant of photon absorption. Many of the observations are reproduced by a model utilizing different photo-ionization amplitudes for light polarization parallel and perpendicular to the molecular axis, a single center model for the molecular initial state and a convergent close coupling continuum final state.

This work was supported by the Chemical Sciences, Geosciences and Biosciences Division,
Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy.

Submitted to DAMOP, May 2004 in Tucson, AZ.

 

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