Dissociative recombination study of PD2+ at CRYRING: Absolute cross-section, chemical branching ratios and three-body fragmentation dynamics

V. Zhaunerchyk; F. Hellberg; A. Ehlerding; W. D. Geppert; M. Larsson; C. R. Vane; M. E. Bannister; E. M. Bahati; F. Österdahl; M. Af Ugglas; R. D. Thomas

doi:10.1080/00268970500185674

Dissociative recombination study of PD₂⁺ at CRYRING: Absolute cross-section, chemical branching ratios and three-body fragmentation dynamics

V. Zhaunerchyk
, F. Hellberg
, A. Ehlerding
, W. D. Geppert
, M. Larsson
, C. R. Vane
, M. E. Bannister
, E. M. Bahati
, F. Österdahl
, M. Af Ugglas
, R. D. Thomas

Electrical & Chemical Operations

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

10 Scopus citations

Abstract

The paper reports an investigation of the dissociative recombination of PD₂⁺ at the heavy-ion storage ring CRYRING. The absolute cross-section has been measured as a function of centre-of-mass energy ranging from 1 meV to 0.1 eV. The experiment performed has shown the dissociative recombination of PD₂⁺ to be dominated by three-body break-up, with a branching ratio of about 78%. Competition between the available three-body channels producing the ground state, P(⁴S), and the first two excited states, P(²D) and P(²P), is observed. The formation of the first excited state dominates over the other two almost equally probable channels with about 75% of all three-body events. The results indicate that the kinetic energy released in the three-body break-up of PD ₂⁺ is randomly shared between the deuterium atoms. The intra-molecular angle on dissociation has also been investigated. A comparative analysis of the dissociative recombination dynamics for the two isovalent systems, PD₂⁺ and NH₂⁺, is undertaken.

Original language	English
Pages (from-to)	2735-2745
Number of pages	11
Journal	Molecular Physics
Volume	103
Issue number	20
DOIs	https://doi.org/10.1080/00268970500185674
State	Published - Oct 20 2005

Funding

We thank staff members of the Manne Siegbahn Laboratory for their assistance and help during the experiment. This work was supported by the Swedish Research Council, the Swedish Institute, the EOARD under Contract F61775-02-C4032, and the IHP Programme of the EC under Contract HPRN-CT-2000-00142. W. D. G. acknowledges the European Union (EU) for granting a ‘Marie Curie Individual Fellowship’ under the EU programme ‘Improving Human Potential’, contract number HMPF-CT-200201583. M. E. B. and C. R. V. acknowledge support by the US Department of Energy, office of Basic Energy Sciences, under Contract No. DE-AC05-96OR22464 with UT-Battelle Corp. E. M. B. acknowledges support through the ORNL Postdoctoral Research Associates Program administered jointly by Oak Ridge Institute of Science and Education and Oak Ridge National Laboratory.

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10.1080/00268970500185674

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Zhaunerchyk, V., Hellberg, F., Ehlerding, A., Geppert, W. D., Larsson, M., Vane, C. R., Bannister, M. E., Bahati, E. M., Österdahl, F., Af Ugglas, M., & Thomas, R. D. (2005). Dissociative recombination study of PD₂⁺ at CRYRING: Absolute cross-section, chemical branching ratios and three-body fragmentation dynamics. Molecular Physics, 103(20), 2735-2745. https://doi.org/10.1080/00268970500185674

@article{210022771f5745df82720c04a8774b20,

title = "Dissociative recombination study of PD2+ at CRYRING: Absolute cross-section, chemical branching ratios and three-body fragmentation dynamics",

abstract = "The paper reports an investigation of the dissociative recombination of PD2+ at the heavy-ion storage ring CRYRING. The absolute cross-section has been measured as a function of centre-of-mass energy ranging from 1 meV to 0.1 eV. The experiment performed has shown the dissociative recombination of PD2+ to be dominated by three-body break-up, with a branching ratio of about 78\%. Competition between the available three-body channels producing the ground state, P(4S), and the first two excited states, P(2D) and P(2P), is observed. The formation of the first excited state dominates over the other two almost equally probable channels with about 75\% of all three-body events. The results indicate that the kinetic energy released in the three-body break-up of PD 2+ is randomly shared between the deuterium atoms. The intra-molecular angle on dissociation has also been investigated. A comparative analysis of the dissociative recombination dynamics for the two isovalent systems, PD2+ and NH2+, is undertaken.",

author = "V. Zhaunerchyk and F. Hellberg and A. Ehlerding and Geppert, \{W. D.\} and M. Larsson and Vane, \{C. R.\} and Bannister, \{M. E.\} and Bahati, \{E. M.\} and F. {\"O}sterdahl and \{Af Ugglas\}, M. and Thomas, \{R. D.\}",

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Zhaunerchyk, V, Hellberg, F, Ehlerding, A, Geppert, WD, Larsson, M, Vane, CR, Bannister, ME, Bahati, EM, Österdahl, F, Af Ugglas, M & Thomas, RD 2005, 'Dissociative recombination study of PD₂⁺ at CRYRING: Absolute cross-section, chemical branching ratios and three-body fragmentation dynamics', Molecular Physics, vol. 103, no. 20, pp. 2735-2745. https://doi.org/10.1080/00268970500185674

TY - JOUR

T1 - Dissociative recombination study of PD2+ at CRYRING

T2 - Absolute cross-section, chemical branching ratios and three-body fragmentation dynamics

AU - Zhaunerchyk, V.

AU - Hellberg, F.

AU - Ehlerding, A.

AU - Geppert, W. D.

AU - Larsson, M.

AU - Vane, C. R.

AU - Bannister, M. E.

AU - Bahati, E. M.

AU - Österdahl, F.

AU - Af Ugglas, M.

AU - Thomas, R. D.

PY - 2005/10/20

Y1 - 2005/10/20

N2 - The paper reports an investigation of the dissociative recombination of PD2+ at the heavy-ion storage ring CRYRING. The absolute cross-section has been measured as a function of centre-of-mass energy ranging from 1 meV to 0.1 eV. The experiment performed has shown the dissociative recombination of PD2+ to be dominated by three-body break-up, with a branching ratio of about 78%. Competition between the available three-body channels producing the ground state, P(4S), and the first two excited states, P(2D) and P(2P), is observed. The formation of the first excited state dominates over the other two almost equally probable channels with about 75% of all three-body events. The results indicate that the kinetic energy released in the three-body break-up of PD 2+ is randomly shared between the deuterium atoms. The intra-molecular angle on dissociation has also been investigated. A comparative analysis of the dissociative recombination dynamics for the two isovalent systems, PD2+ and NH2+, is undertaken.

AB - The paper reports an investigation of the dissociative recombination of PD2+ at the heavy-ion storage ring CRYRING. The absolute cross-section has been measured as a function of centre-of-mass energy ranging from 1 meV to 0.1 eV. The experiment performed has shown the dissociative recombination of PD2+ to be dominated by three-body break-up, with a branching ratio of about 78%. Competition between the available three-body channels producing the ground state, P(4S), and the first two excited states, P(2D) and P(2P), is observed. The formation of the first excited state dominates over the other two almost equally probable channels with about 75% of all three-body events. The results indicate that the kinetic energy released in the three-body break-up of PD 2+ is randomly shared between the deuterium atoms. The intra-molecular angle on dissociation has also been investigated. A comparative analysis of the dissociative recombination dynamics for the two isovalent systems, PD2+ and NH2+, is undertaken.

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JO - Molecular Physics

JF - Molecular Physics

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ER -

Dissociative recombination study of PD₂⁺ at CRYRING: Absolute cross-section, chemical branching ratios and three-body fragmentation dynamics

Abstract

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