Hyperfine structure and lifetime of the C 2∑+, v=0 state of CH

Wim Ubachs; Gerard Meyer; J.J. ter Meulen; A. Dymanus

doi:10.1063/1.450284

Hyperfine structure and lifetime of the C ²∑⁺, v=0 state of CH

Wim Ubachs^*
, Gerard Meyer
, J.J. ter Meulen
, A. Dymanus

^*Corresponding author for this work

Research output: Contribution to Journal › Article › Academic › peer-review

217 Downloads (Pure)

Abstract

From a laser induced fluorescence (LIF) experiment on a molecular beam of CH, we have obtained the b and c hyperfine constants, the γ and γ_D spin-rotation constants as well as accurate values for the rotational constants B, D, and H for the C ²∑⁺, υ=0 state. From measurements of the linewidths, that are partially caused by predissociation, and by comparing relative line intensities, we determined different lifetimes for upper (F₁) and lower (F₂) ρ-doublet states of the C ₂∑₊ state. For the F₁ states we find a constant lifetime of 3.7±1.0 ns, that is independent of N, while for the F₂ states we observed an increase in lifetime for higher N up to 8.0±1.5 ns for N=11.

Original language	English
Pages (from-to)	3032-3041
Number of pages	10
Journal	Journal of Chemical Physics
Volume	84
Issue number	6
DOIs	https://doi.org/10.1063/1.450284
Publication status	Published - 15 Mar 1986

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access to Document

10.1063/1.450284

CH-UVFinal published version, 0.98 MB

Persistent URL (handle)

Persistent link

Cite this

@article{31e0d52d728440709f5db1b87963b0a7,

title = "Hyperfine structure and lifetime of the C 2∑+, v=0 state of CH",

abstract = "From a laser induced fluorescence (LIF) experiment on a molecular beam of CH, we have obtained the b and c hyperfine constants, the γ and γD spin-rotation constants as well as accurate values for the rotational constants B, D, and H for the C 2∑+, υ=0 state. From measurements of the linewidths, that are partially caused by predissociation, and by comparing relative line intensities, we determined different lifetimes for upper (F1) and lower (F2) ρ-doublet states of the C 2∑+ state. For the F1 states we find a constant lifetime of 3.7±1.0 ns, that is independent of N, while for the F2 states we observed an increase in lifetime for higher N up to 8.0±1.5 ns for N=11.",

author = "Wim Ubachs and Gerard Meyer and \{ter Meulen\}, J.J. and A. Dymanus",

year = "1986",

month = mar,

day = "15",

doi = "10.1063/1.450284",

language = "English",

volume = "84",

pages = "3032--3041",

journal = "Journal of Chemical Physics",

issn = "0021-9606",

publisher = "American Institute of Physics",

number = "6",

}

TY - JOUR

T1 - Hyperfine structure and lifetime of the C 2∑+, v=0 state of CH

AU - Ubachs, Wim

AU - Meyer, Gerard

AU - ter Meulen, J.J.

AU - Dymanus, A.

PY - 1986/3/15

Y1 - 1986/3/15

N2 - From a laser induced fluorescence (LIF) experiment on a molecular beam of CH, we have obtained the b and c hyperfine constants, the γ and γD spin-rotation constants as well as accurate values for the rotational constants B, D, and H for the C 2∑+, υ=0 state. From measurements of the linewidths, that are partially caused by predissociation, and by comparing relative line intensities, we determined different lifetimes for upper (F1) and lower (F2) ρ-doublet states of the C 2∑+ state. For the F1 states we find a constant lifetime of 3.7±1.0 ns, that is independent of N, while for the F2 states we observed an increase in lifetime for higher N up to 8.0±1.5 ns for N=11.

AB - From a laser induced fluorescence (LIF) experiment on a molecular beam of CH, we have obtained the b and c hyperfine constants, the γ and γD spin-rotation constants as well as accurate values for the rotational constants B, D, and H for the C 2∑+, υ=0 state. From measurements of the linewidths, that are partially caused by predissociation, and by comparing relative line intensities, we determined different lifetimes for upper (F1) and lower (F2) ρ-doublet states of the C 2∑+ state. For the F1 states we find a constant lifetime of 3.7±1.0 ns, that is independent of N, while for the F2 states we observed an increase in lifetime for higher N up to 8.0±1.5 ns for N=11.

UR - https://www.scopus.com/pages/publications/0038081661

UR - https://www.scopus.com/pages/publications/0038081661#tab=citedBy

U2 - 10.1063/1.450284

DO - 10.1063/1.450284

M3 - Article

SN - 0021-9606

VL - 84

SP - 3032

EP - 3041

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 6

ER -