Dissociative charge transfer from highly excited Na Rydberg atoms to vibrationally excited Na2 molecules

Oliver Kaufmann; Aigars Ekers; Christian Gebauer-Rochholz; Kai Uwe Mettendorf; Matthias Keil; Klaas Bergmann

doi:10.1016/S1387-3806(00)00290-6

Dissociative charge transfer from highly excited Na Rydberg atoms to vibrationally excited Na₂ molecules

Oliver Kaufmann, Aigars Ekers^*, Christian Gebauer-Rochholz, Kai Uwe Mettendorf, Matthias Keil, Klaas Bergmann

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We report the observation of the vibrational dependence of dissociative charge transfer (DCT), Na₂(X¹Σ_g⁺, v″) + Na**(nl) → Na^- + Na + Na⁺, in a single Na/Na₂ supersonic beam at low intrabeam collision energies (1.6 meV) using the STIRAP technique for selective vibrational excitation of Na₂ in the electronic ground state and time-of-flight mass analysis of the ions. The efficiency of this process increases by about an order of magnitude in the range 13 ≤ v″ ≤ 22. Some perspectives are discussed regarding the implementation of a field-free ion-imaging technique for the detection of ions that will allow the direct determination of the kinetic energy distributions of product negative ions and thus distinguish among different possible mechanisms of the DCT process. The first results of test experiments on imaging of photodissociation products of Na₂(v″) without an extraction field are presented, confirming the potential of the new detection concept.

Original language	English (US)
Pages (from-to)	233-242
Number of pages	10
Journal	International Journal of Mass Spectrometry
Volume	205
Issue number	1-3
DOIs	https://doi.org/10.1016/S1387-3806(00)00290-6
State	Published - Feb 15 2001
Externally published	Yes

Bibliographical note

Funding Information:
This work is supported by the Deutsche Forschungsgemeinschaft. One of the authors (A.E.) is supported by the EU Marie Curie Individual Fellowship MCFI-1999-00368. We thank H. Hotop and W. Meyer for valuable discussions and L. Meyer for laser assistance.

Keywords

Dissociative charge transfer
Rydberg atoms

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

Access to Document

10.1016/S1387-3806(00)00290-6

Cite this

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title = "Dissociative charge transfer from highly excited Na Rydberg atoms to vibrationally excited Na2 molecules",

abstract = "We report the observation of the vibrational dependence of dissociative charge transfer (DCT), Na2(X1Σg+, v″) + Na**(nl) → Na- + Na + Na+, in a single Na/Na2 supersonic beam at low intrabeam collision energies (1.6 meV) using the STIRAP technique for selective vibrational excitation of Na2 in the electronic ground state and time-of-flight mass analysis of the ions. The efficiency of this process increases by about an order of magnitude in the range 13 ≤ v″ ≤ 22. Some perspectives are discussed regarding the implementation of a field-free ion-imaging technique for the detection of ions that will allow the direct determination of the kinetic energy distributions of product negative ions and thus distinguish among different possible mechanisms of the DCT process. The first results of test experiments on imaging of photodissociation products of Na2(v″) without an extraction field are presented, confirming the potential of the new detection concept.",

keywords = "Dissociative charge transfer, Rydberg atoms",

author = "Oliver Kaufmann and Aigars Ekers and Christian Gebauer-Rochholz and Mettendorf, {Kai Uwe} and Matthias Keil and Klaas Bergmann",

note = "Funding Information: This work is supported by the Deutsche Forschungsgemeinschaft. One of the authors (A.E.) is supported by the EU Marie Curie Individual Fellowship MCFI-1999-00368. We thank H. Hotop and W. Meyer for valuable discussions and L. Meyer for laser assistance.",

year = "2001",

month = feb,

day = "15",

doi = "10.1016/S1387-3806(00)00290-6",

language = "English (US)",

volume = "205",

pages = "233--242",

journal = "International Journal of Mass Spectrometry",

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publisher = "Elsevier B.V.",

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T1 - Dissociative charge transfer from highly excited Na Rydberg atoms to vibrationally excited Na2 molecules

AU - Kaufmann, Oliver

AU - Ekers, Aigars

AU - Gebauer-Rochholz, Christian

AU - Mettendorf, Kai Uwe

AU - Keil, Matthias

AU - Bergmann, Klaas

N1 - Funding Information: This work is supported by the Deutsche Forschungsgemeinschaft. One of the authors (A.E.) is supported by the EU Marie Curie Individual Fellowship MCFI-1999-00368. We thank H. Hotop and W. Meyer for valuable discussions and L. Meyer for laser assistance.

PY - 2001/2/15

Y1 - 2001/2/15

N2 - We report the observation of the vibrational dependence of dissociative charge transfer (DCT), Na2(X1Σg+, v″) + Na**(nl) → Na- + Na + Na+, in a single Na/Na2 supersonic beam at low intrabeam collision energies (1.6 meV) using the STIRAP technique for selective vibrational excitation of Na2 in the electronic ground state and time-of-flight mass analysis of the ions. The efficiency of this process increases by about an order of magnitude in the range 13 ≤ v″ ≤ 22. Some perspectives are discussed regarding the implementation of a field-free ion-imaging technique for the detection of ions that will allow the direct determination of the kinetic energy distributions of product negative ions and thus distinguish among different possible mechanisms of the DCT process. The first results of test experiments on imaging of photodissociation products of Na2(v″) without an extraction field are presented, confirming the potential of the new detection concept.

AB - We report the observation of the vibrational dependence of dissociative charge transfer (DCT), Na2(X1Σg+, v″) + Na**(nl) → Na- + Na + Na+, in a single Na/Na2 supersonic beam at low intrabeam collision energies (1.6 meV) using the STIRAP technique for selective vibrational excitation of Na2 in the electronic ground state and time-of-flight mass analysis of the ions. The efficiency of this process increases by about an order of magnitude in the range 13 ≤ v″ ≤ 22. Some perspectives are discussed regarding the implementation of a field-free ion-imaging technique for the detection of ions that will allow the direct determination of the kinetic energy distributions of product negative ions and thus distinguish among different possible mechanisms of the DCT process. The first results of test experiments on imaging of photodissociation products of Na2(v″) without an extraction field are presented, confirming the potential of the new detection concept.

KW - Dissociative charge transfer

KW - Rydberg atoms

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DO - 10.1016/S1387-3806(00)00290-6

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