Studies of energy transfer processes in triplet states of N2. I. Energy pooling by vibrationally selected N2 (A 3Σ u+, v) molecules

I. Nadler; S. Rosenwaks

doi:10.1063/1.449105

Studies of energy transfer processes in triplet states of N₂. I. Energy pooling by vibrationally selected N₂ (A ³Σ _u⁺, v) molecules

I. Nadler, S. Rosenwaks

Department of Physics

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Abstract

Emissions from the second positive (C-B) and from the Herman infrared (HIR) systems of N₂, generated by the N₂(A,v) + N ₂(A,v′) energy pooling (EP) reaction, were studied at room temperature in a flowing afterglow apparatus. Using "vibrational quenchers" of N₂ (A,v), the emission resulting from the EP reaction of 2N₂(A,v = 0) was compared to that of 2N₂ (A,v = 0,1,2). The dependence of the vibrational distribution of both the N ₂ (C,v) and the upper N₂(HIR,v) states on that of N ₂(A,v) was accurately measured and analyzed. It is shown that Franck-Condon factors and energy matches for the EP reactions can account for this dependence. The spectroscopic and kinetic data suggests that the EP reaction is governed by long range interaction which involves direct excitation transfer. It also suggests that the HIR system may originate from transitions from the unobserved ³Π_u(II) state to G ³Δ_g.

Original language	English
Pages (from-to)	3932-3940
Number of pages	9
Journal	Journal of Chemical Physics
Volume	83
Issue number	8
DOIs	https://doi.org/10.1063/1.449105
State	Published - 1 Jan 1985

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Studies of energy transfer processes in triplet states of N2. I. Energy pooling by vibrationally selected N2 (A 3Σ u+, v) molecules",

abstract = "Emissions from the second positive (C-B) and from the Herman infrared (HIR) systems of N2, generated by the N2(A,v) + N 2(A,v′) energy pooling (EP) reaction, were studied at room temperature in a flowing afterglow apparatus. Using {"}vibrational quenchers{"} of N2 (A,v), the emission resulting from the EP reaction of 2N2(A,v = 0) was compared to that of 2N2 (A,v = 0,1,2). The dependence of the vibrational distribution of both the N 2 (C,v) and the upper N2(HIR,v) states on that of N 2(A,v) was accurately measured and analyzed. It is shown that Franck-Condon factors and energy matches for the EP reactions can account for this dependence. The spectroscopic and kinetic data suggests that the EP reaction is governed by long range interaction which involves direct excitation transfer. It also suggests that the HIR system may originate from transitions from the unobserved 3Πu(II) state to G 3Δg.",

author = "I. Nadler and S. Rosenwaks",

year = "1985",

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doi = "10.1063/1.449105",

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T1 - Studies of energy transfer processes in triplet states of N2. I. Energy pooling by vibrationally selected N2 (A 3Σ u+, v) molecules

AU - Nadler, I.

AU - Rosenwaks, S.

PY - 1985/1/1

Y1 - 1985/1/1

N2 - Emissions from the second positive (C-B) and from the Herman infrared (HIR) systems of N2, generated by the N2(A,v) + N 2(A,v′) energy pooling (EP) reaction, were studied at room temperature in a flowing afterglow apparatus. Using "vibrational quenchers" of N2 (A,v), the emission resulting from the EP reaction of 2N2(A,v = 0) was compared to that of 2N2 (A,v = 0,1,2). The dependence of the vibrational distribution of both the N 2 (C,v) and the upper N2(HIR,v) states on that of N 2(A,v) was accurately measured and analyzed. It is shown that Franck-Condon factors and energy matches for the EP reactions can account for this dependence. The spectroscopic and kinetic data suggests that the EP reaction is governed by long range interaction which involves direct excitation transfer. It also suggests that the HIR system may originate from transitions from the unobserved 3Πu(II) state to G 3Δg.

AB - Emissions from the second positive (C-B) and from the Herman infrared (HIR) systems of N2, generated by the N2(A,v) + N 2(A,v′) energy pooling (EP) reaction, were studied at room temperature in a flowing afterglow apparatus. Using "vibrational quenchers" of N2 (A,v), the emission resulting from the EP reaction of 2N2(A,v = 0) was compared to that of 2N2 (A,v = 0,1,2). The dependence of the vibrational distribution of both the N 2 (C,v) and the upper N2(HIR,v) states on that of N 2(A,v) was accurately measured and analyzed. It is shown that Franck-Condon factors and energy matches for the EP reactions can account for this dependence. The spectroscopic and kinetic data suggests that the EP reaction is governed by long range interaction which involves direct excitation transfer. It also suggests that the HIR system may originate from transitions from the unobserved 3Πu(II) state to G 3Δg.

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DO - 10.1063/1.449105

M3 - Article

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SN - 0021-9606

VL - 83

SP - 3932

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JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 8

ER -

Studies of energy transfer processes in triplet states of N₂. I. Energy pooling by vibrationally selected N₂ (A ³Σ _u⁺, v) molecules

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