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Pedersen HB, Altevogt S, Jordon-Thaden B, et al. Crossed beam photodissociation imaging of HeH+ with vacuum ultraviolet free-electron laser pulses. Phys Rev Lett. 2007;98(22):223202doi: 10.1103/PhysRevLett.98.223202.
Pedersen, H. B., Altevogt, S., Jordon-Thaden, B., Heber, O., Rappaport, M. L., Schwalm, D., Ullrich, J., Zajfman, D., Treusch, R., Guerassimova, N., Martins, M., Hoeft, J. T., Wellhöfer, M., & Wolf, A. (2007). Crossed beam photodissociation imaging of HeH+ with vacuum ultraviolet free-electron laser pulses. Physical review letters, 98(22), 223202. https://doi.org/10.1103/PhysRevLett.98.223202
Pedersen, H B, et al. "Crossed beam photodissociation imaging of HeH+ with vacuum ultraviolet free-electron laser pulses." Physical review letters vol. 98,22 (2007): 223202. doi: https://doi.org/10.1103/PhysRevLett.98.223202
Pedersen HB, Altevogt S, Jordon-Thaden B, Heber O, Rappaport ML, Schwalm D, Ullrich J, Zajfman D, Treusch R, Guerassimova N, Martins M, Hoeft JT, Wellhöfer M, Wolf A. Crossed beam photodissociation imaging of HeH+ with vacuum ultraviolet free-electron laser pulses. Phys Rev Lett. 2007 Jun 01;98(22):223202. doi: 10.1103/PhysRevLett.98.223202. Epub 2007 Jun 01. PMID: 17677841.
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Phys Rev Lett. 2007 Jun 01;98(22):223202. doi: 10.1103/PhysRevLett.98.223202. Epub 2007 Jun 01.

Crossed beam photodissociation imaging of HeH+ with vacuum ultraviolet free-electron laser pulses.

Physical review letters

H B Pedersen, S Altevogt, B Jordon-Thaden, O Heber, M L Rappaport, D Schwalm, J Ullrich, D Zajfman, R Treusch, N Guerassimova, M Martins, J-T Hoeft, M Wellhöfer, A Wolf

Affiliations

  1. Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany. [email protected]

PMID: 17677841 DOI: 10.1103/PhysRevLett.98.223202

Abstract

Molecular photofragmentation has been studied by event imaging on HeH+ ions at 32 nm (38.7 eV) in a fast ion beam crossed with the free-electron laser in Hamburg (FLASH), analyzing neutral He product directions and energies. Fragmentation into He(1snl,n > or = 2)+H+ was observed to yield significant photodissociation at 32 nm with an absolute cross section of (1.4+/-0.7) x 10(-18) cm2, releasing energies of 10-20 eV. A clear dominance of photodissociation perpendicular to the laser polarization was found in contrast to the excitation paths so far emphasized in theoretical studies.

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