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Metastable states of diatomic hydrogen anions

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

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

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

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Jordon-Thaden,  Brandon
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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

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Citation

Kreckel, H., Herwig, P., Schwalm, D., Cizek, M., Golser, R., Heber, O., et al. (2014). Metastable states of diatomic hydrogen anions. Journal of Physics: Conference Series, 488(Section1): 012034. doi:10.1088/1742-6596/488/1/012034.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-16E6-D
Abstract
Transient states of the negative hydrogen molecule H−2 have drawn attention as intermediate reaction complexes in important molecular reactions like associative detachment (AD: H− + H → H−2→ H−2 + e−) and dissociative attachment (DA: e− + H2 → H−2 → H + H−). Recently it has been shown that metastable states of hydrogen molecular anions exist that defy both auto detachment and spontaneous dissociation for several microseconds (in the case of H−2) and even milliseconds (in the case of D−2). Here we present Coulomb explosion measurements for H−2 and D−2 that provide detailed information on the shape of the molecular wave function. We compare these experimental results with calculated wave functions obtained using a nonlocal resonance model. Our measurements confirm the predicted stabilization of H−2 and D−2 in states of high angular momentum.