Electron-detachment cross section for ${\mathrm{CN}}^{\ensuremath{-}}$ and ${\mathrm{O}}_{2}^{\ensuremath{-}}$ incident on N${}_{2}$ at intermediate velocities

Electron-detachment cross section for ${CN}^{-}$ and $O_{2}^{-}$ incident on N $_{2}$ at intermediate velocities

Ginette Jalbert, R. F. Nascimento, Carlos R. de Carvalho, Carla R. Carvalho, B. F. Magnani, A. C. F Santos, A. B. Rocha, M. M. Sant'Anna, and N. V. de Castro Faria

Phys. Rev. A 89, 012712 – Published 27 January 2014

Abstract

The electron-detachment cross section was measured for the molecular negative ions ${CN}^{-}$ and $O_{2}^{-}$ incident on N $_{2}$ , in the 0.08–1.2 a.u. velocity region. Our setup uses the gas stripper of a tandem accelerator as a gas chamber. All cross sections present a maximum near 0.4 a.u., a velocity corresponding to the well-known shape-resonance that appears in the electron-N $_{2}$ collisions. A semiclassical model is employed to analyze the data. The role of this shape resonance is discussed in this article.

Received 1 November 2013

DOI:https://doi.org/10.1103/PhysRevA.89.012712

Authors & Affiliations

Ginette Jalbert^1,*, R. F. Nascimento², Carlos R. de Carvalho¹, Carla R. Carvalho³, B. F. Magnani¹, A. C. F Santos¹, A. B. Rocha⁴, M. M. Sant'Anna¹, and N. V. de Castro Faria^1,†

¹Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-972, RJ, Brazil
²Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Petrópolis, 25620-003, RJ, Brazil
³Instituto de Aplicação Fernando Rodrigues da Silveira, UERJ, Rio de Janeiro, 20261-232, RJ, Brazil
⁴Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-909, RJ, Brazil

^*ginette@if.ufrj.br
^†faria@if.ufrj.br

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Vol. 89, Iss. 1 — January 2014

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Physical Review A

covering atomic, molecular, and optical physics and quantum information

Electron-detachment cross section for ${CN}^{-}$ and $O_{2}^{-}$ incident on N $_{2}$ at intermediate velocities

Ginette Jalbert, R. F. Nascimento, Carlos R. de Carvalho, Carla R. Carvalho, B. F. Magnani, A. C. F Santos, A. B. Rocha, M. M. Sant'Anna, and N. V. de Castro Faria

Phys. Rev. A 89, 012712 – Published 27 January 2014

Abstract

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Physical Review A

covering atomic, molecular, and optical physics and quantum information

Electron-detachment cross section for CN− and O2− incident on N2 at intermediate velocities

Ginette Jalbert, R. F. Nascimento, Carlos R. de Carvalho, Carla R. Carvalho, B. F. Magnani, A. C. F Santos, A. B. Rocha, M. M. Sant'Anna, and N. V. de Castro Faria

Phys. Rev. A 89, 012712 – Published 27 January 2014

Abstract

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Electron-detachment cross section for ${CN}^{-}$ and $O_{2}^{-}$ incident on N $_{2}$ at intermediate velocities