Explosion, ion acceleration and molecular fragmentation of methane clusters in the pulsed beam of a free-electron laser
2012 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 86, no 3, 033201- p.Article in journal (Refereed) Published
X-ray lasers offer new possibilities for creating and probing extreme states of matter. We used intense and short x-ray pulses from the FLASH soft x-ray laser to trigger the explosions of CH4 and CD4 molecules and their clusters. The results show that the explosion dynamics depends on cluster size and indicate a transition from Coulomb explosion to hydrodynamic expansion in larger clusters. The explosion of CH4 and CD4 clusters shows a strong isotope effect: The heavier deuterons acquire higher kinetic energies than the lighter protons. This may be due to an extended inertial confinement of deuterons vs. protons near a rapidly charging cluster core during exposure.
Place, publisher, year, edition, pages
2012. Vol. 86, no 3, 033201- p.
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:uu:diva-180987DOI: 10.1103/PhysRevA.86.033201ISI: 000308286600008OAI: oai:DiVA.org:uu-180987DiVA: diva2:552580