Metastable states of diatomic hydrogen anions

Holger Kreckel; Philipp Herwig; Dirk Schwalm; M. Čížek; Robin Golser; Oded Heber; Brandon Jordon-Thaden; Andreas Wolf

doi:10.1088/1742-6596/488/1/012034

Metastable states of diatomic hydrogen anions

Holger Kreckel, Philipp Herwig, Dirk Schwalm, M. Čížek, Robin Golser, Oded Heber, Brandon Jordon-Thaden, Andreas Wolf

Department of Particle Physics and Astrophysics

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

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.

Original language	English
Article number	012034
Journal	Journal of Physics: Conference Series
Volume	488
Issue number	SECTION 1
DOIs	https://doi.org/10.1088/1742-6596/488/1/012034
Publication status	Published - 2014
Event	28th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2013 - Lanzhou, China Duration: 24 Jul 2013 → 30 Jul 2013

Funding

We thank the accelerator staff at the Max-Planck-Institute for Nuclear Physics. We acknowledge support from the Max-Planck-Society. H.K. was supported by the European Research Council under Grant Agreement No. StG 307163, M.C. was supported by the grant agency of the Czech Republic project No. GACR 208/10/1281. D. S. acknowledges support by the Weizmann Institute through the Joseph Meyerhoff program.

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Access to Document

10.1088/1742-6596/488/1/012034

Cite this

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title = "Metastable states of diatomic hydrogen anions",

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.",

author = "Holger Kreckel and Philipp Herwig and Dirk Schwalm and M. {\v C}{\'i}{\v z}ek and Robin Golser and Oded Heber and Brandon Jordon-Thaden and Andreas Wolf",

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TY - JOUR

T1 - Metastable states of diatomic hydrogen anions

AU - Kreckel, Holger

AU - Herwig, Philipp

AU - Schwalm, Dirk

AU - Čížek, M.

AU - Golser, Robin

AU - Heber, Oded

AU - Jordon-Thaden, Brandon

AU - Wolf, Andreas

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

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U2 - 10.1088/1742-6596/488/1/012034

DO - 10.1088/1742-6596/488/1/012034

M3 - Conference article

AN - SCOPUS:84903749423

SN - 1742-6588

VL - 488

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - SECTION 1

M1 - 012034

T2 - 28th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2013

Y2 - 24 July 2013 through 30 July 2013

ER -

Metastable states of diatomic hydrogen anions

Abstract

Funding

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