Near threshold Cl-·CH3I photodetachment

Apparent 2P1/2 channel suppression and enhanced 2P3/2 channel vibrational excitation

Matthew Van Duzor, Foster Mbaiwa, Joshua Lasinski, Diep Dao, Nicholas Holtgrewe, Richard Mabbs

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cl-·CH3I cluster anion photoelectron images are recorded over a range of detachment wavelengths in the immediate post threshold region. The photoelectron spectral features fall into two categories. A number of weak, photon energy dependent transitions are observed and attributed to atomic anion fragmentation products. Several more intense, higher electron binding energy transitions result from single photon cluster anion detachment. Comparison with I-·CH3I suggests that the detachment process is more complicated for Cl-·CH3I. The single photon transition spacing is consistent with CH3I ν3 mode excitation, but the two distinct vibronic bands of I-·CH3I detachment are not easily distinguished in the Cl-·CH3I spectra. Similarly, while the spectral intensities for both cluster anions show non-Franck Condon behavior, the level of vibrational excitation appears greater for Cl-·CH3I detachment. These observations are discussed in terms of low lying electronic states of CH3I along the C-I coordinate, and the influence of the CH3I moiety on the neutral halogen atom states.

Original languageEnglish
Article number184315
JournalJournal of Chemical Physics
Volume134
Issue number18
DOIs
Publication statusPublished - May 14 2011

Fingerprint

photodetachment
detachment
Anions
retarding
thresholds
Photons
anions
Photoelectrons
excitation
photons
photoelectrons
Halogens
Electronic states
Electron transitions
Binding energy
halogens
fragmentation
Wavelength
Atoms
binding energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Van Duzor, Matthew ; Mbaiwa, Foster ; Lasinski, Joshua ; Dao, Diep ; Holtgrewe, Nicholas ; Mabbs, Richard. / Near threshold Cl-·CH3I photodetachment : Apparent 2P1/2 channel suppression and enhanced 2P3/2 channel vibrational excitation. In: Journal of Chemical Physics. 2011 ; Vol. 134, No. 18.
@article{1f81817c97ab4989b0978a87d79b0137,
title = "Near threshold Cl-·CH3I photodetachment: Apparent 2P1/2 channel suppression and enhanced 2P3/2 channel vibrational excitation",
abstract = "Cl-·CH3I cluster anion photoelectron images are recorded over a range of detachment wavelengths in the immediate post threshold region. The photoelectron spectral features fall into two categories. A number of weak, photon energy dependent transitions are observed and attributed to atomic anion fragmentation products. Several more intense, higher electron binding energy transitions result from single photon cluster anion detachment. Comparison with I-·CH3I suggests that the detachment process is more complicated for Cl-·CH3I. The single photon transition spacing is consistent with CH3I ν3 mode excitation, but the two distinct vibronic bands of I-·CH3I detachment are not easily distinguished in the Cl-·CH3I spectra. Similarly, while the spectral intensities for both cluster anions show non-Franck Condon behavior, the level of vibrational excitation appears greater for Cl-·CH3I detachment. These observations are discussed in terms of low lying electronic states of CH3I along the C-I coordinate, and the influence of the CH3I moiety on the neutral halogen atom states.",
author = "{Van Duzor}, Matthew and Foster Mbaiwa and Joshua Lasinski and Diep Dao and Nicholas Holtgrewe and Richard Mabbs",
year = "2011",
month = "5",
day = "14",
doi = "10.1063/1.3583812",
language = "English",
volume = "134",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "18",

}

Near threshold Cl-·CH3I photodetachment : Apparent 2P1/2 channel suppression and enhanced 2P3/2 channel vibrational excitation. / Van Duzor, Matthew; Mbaiwa, Foster; Lasinski, Joshua; Dao, Diep; Holtgrewe, Nicholas; Mabbs, Richard.

In: Journal of Chemical Physics, Vol. 134, No. 18, 184315, 14.05.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Near threshold Cl-·CH3I photodetachment

T2 - Apparent 2P1/2 channel suppression and enhanced 2P3/2 channel vibrational excitation

AU - Van Duzor, Matthew

AU - Mbaiwa, Foster

AU - Lasinski, Joshua

AU - Dao, Diep

AU - Holtgrewe, Nicholas

AU - Mabbs, Richard

PY - 2011/5/14

Y1 - 2011/5/14

N2 - Cl-·CH3I cluster anion photoelectron images are recorded over a range of detachment wavelengths in the immediate post threshold region. The photoelectron spectral features fall into two categories. A number of weak, photon energy dependent transitions are observed and attributed to atomic anion fragmentation products. Several more intense, higher electron binding energy transitions result from single photon cluster anion detachment. Comparison with I-·CH3I suggests that the detachment process is more complicated for Cl-·CH3I. The single photon transition spacing is consistent with CH3I ν3 mode excitation, but the two distinct vibronic bands of I-·CH3I detachment are not easily distinguished in the Cl-·CH3I spectra. Similarly, while the spectral intensities for both cluster anions show non-Franck Condon behavior, the level of vibrational excitation appears greater for Cl-·CH3I detachment. These observations are discussed in terms of low lying electronic states of CH3I along the C-I coordinate, and the influence of the CH3I moiety on the neutral halogen atom states.

AB - Cl-·CH3I cluster anion photoelectron images are recorded over a range of detachment wavelengths in the immediate post threshold region. The photoelectron spectral features fall into two categories. A number of weak, photon energy dependent transitions are observed and attributed to atomic anion fragmentation products. Several more intense, higher electron binding energy transitions result from single photon cluster anion detachment. Comparison with I-·CH3I suggests that the detachment process is more complicated for Cl-·CH3I. The single photon transition spacing is consistent with CH3I ν3 mode excitation, but the two distinct vibronic bands of I-·CH3I detachment are not easily distinguished in the Cl-·CH3I spectra. Similarly, while the spectral intensities for both cluster anions show non-Franck Condon behavior, the level of vibrational excitation appears greater for Cl-·CH3I detachment. These observations are discussed in terms of low lying electronic states of CH3I along the C-I coordinate, and the influence of the CH3I moiety on the neutral halogen atom states.

UR - http://www.scopus.com/inward/record.url?scp=79958830126&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79958830126&partnerID=8YFLogxK

U2 - 10.1063/1.3583812

DO - 10.1063/1.3583812

M3 - Article

VL - 134

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 18

M1 - 184315

ER -