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Metastable states of D2- observed by foil-induced Coulomb explosion imaging

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons39375

Herwig,  Philipp
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31023

Schwalm,  Dirk
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30535

Grieser,  Manfred
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30936

Repnow,  Roland
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31190

Wolf,  Andreas
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30721

Kreckel,  Holger
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Citation

Herwig, P., Schwalm, D., Cizek, M., Golser, R., Grieser, M., Heber, O., et al. (2013). Metastable states of D2- observed by foil-induced Coulomb explosion imaging. Physical Review A, 87(6): 062513, pp. 1-8. doi:10.1103/PhysRevA.87.062513.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-3BAB-3
Abstract
In recent years it was demonstrated that the negative hydrogen molecular ions H2− and D2− exist in long-lived states with lifetimes exceeding 1 μs (H2−) and 1 ms (D2−). These metastable ions exhibit very large internuclear distances and possess high angular momenta, which stabilizes them against autodetachment. Here we present the results of a foil-induced Coulomb explosion imaging experiment that allows for the measurement of the rovibrational wave functions of the metastable D2− ions. We compare our results to previous predictions from a nonlocal resonance theory. Our measurements do not confirm the discrepancy between experiment and theory that was inferred from previous photofragmentation studies. In fact, we find good agreement between the experiment and calculated wave functions for the most long-lived states with rotational quantum numbers J=37 and 38.