Real-time detection of S(1D2) photofragments produced from the 1B2(1Σu+) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses

Takuya Horio; Roman Spesyvtsev; Yu Furumido; Toshinori Suzuki

doi:10.1063/1.4982219

Real-time detection of S(1D2) photofragments produced from the 1B2(1Σu+) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses

Takuya Horio, Roman Spesyvtsev, Yu Furumido, Toshinori Suzuki

Physics

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Abstract

Ultrafast photodissociation dynamics from the ¹B₂(¹Σu⁺) state of CS2 are studied by time-resolved photoelectron imaging using the fourth (4ω, 198 nm) and sixth (6ω, 133 nm) harmonics of a femtosecond Ti:sapphire laser. The ¹B₂ state of CS2 was prepared with the 4ω pulses, and subsequent dynamics were probed using the 6ω vacuum ultraviolet (VUV) pulses. The VUV pulses enabled real-time detection of S(1D2) photofragments, produced via CS₂*(¹B₂(¹Σu⁺)) → CS(X ¹Σ⁺) + S(¹D₂). The photoionization signal of dissociating CS₂*(1B₂(¹Σu⁺)) molecules starts to decrease at about 100 fs, while the S(¹D₂) fragments appear with a finite (ca. 400 fs) delay time after the pump pulse. Also discussed is the configuration interaction of the ¹B₂(¹Σu⁺) state based on relative photoionization cross-sections to different cationic states.

Original language	English
Article number	013932
Number of pages	6
Journal	Journal of Chemical Physics
Volume	147
Issue number	1
Early online date	9 May 2017
DOIs	https://doi.org/10.1063/1.4982219
Publication status	Published - 7 Jul 2017

Keywords

photodissociation dynamics
photoelectron spectroscopy
pump-probe experiments
carbon disulphide
photoelectron imaging
photoionization
vacuum
ultraviolet
photfragmnets
photoabsorption spectrum

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Horio-etal-JCP-2017-Real-time-detection-of-S1D2-photofragmentsAccepted author manuscript, 919 KB

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title = "Real-time detection of S(1D2) photofragments produced from the 1B2(1Σu+) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses",

abstract = "Ultrafast photodissociation dynamics from the 1B2(1Σu+) state of CS2 are studied by time-resolved photoelectron imaging using the fourth (4ω, 198 nm) and sixth (6ω, 133 nm) harmonics of a femtosecond Ti:sapphire laser. The 1B2 state of CS2 was prepared with the 4ω pulses, and subsequent dynamics were probed using the 6ω vacuum ultraviolet (VUV) pulses. The VUV pulses enabled real-time detection of S(1D2) photofragments, produced via CS2*(1B2(1Σu+)) → CS(X 1Σ+) + S(1D2). The photoionization signal of dissociating CS2*(1B2(1Σu+)) molecules starts to decrease at about 100 fs, while the S(1D2) fragments appear with a finite (ca. 400 fs) delay time after the pump pulse. Also discussed is the configuration interaction of the 1B2(1Σu+) state based on relative photoionization cross-sections to different cationic states.",

keywords = "photodissociation dynamics, photoelectron spectroscopy, pump-probe experiments, carbon disulphide, photoelectron imaging, photoionization, vacuum, ultraviolet, photfragmnets, photoabsorption spectrum",

author = "Takuya Horio and Roman Spesyvtsev and Yu Furumido and Toshinori Suzuki",

note = "This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Horio, T., Spesyvtsev, R., Furumido, Y., \& Suzuki, T. (2017). Real-time detection of S(1D2) photofragments produced from the 1B2(1Σu+) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses. Journal of Chemical Physics, 147(1), [013932] and may be found at https://doi.org/10.1063/1.4982219.",

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AU - Horio, Takuya

AU - Spesyvtsev, Roman

AU - Furumido, Yu

AU - Suzuki, Toshinori

N1 - This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Horio, T., Spesyvtsev, R., Furumido, Y., & Suzuki, T. (2017). Real-time detection of S(1D2) photofragments produced from the 1B2(1Σu+) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses. Journal of Chemical Physics, 147(1), [013932] and may be found at https://doi.org/10.1063/1.4982219.

PY - 2017/7/7

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N2 - Ultrafast photodissociation dynamics from the 1B2(1Σu+) state of CS2 are studied by time-resolved photoelectron imaging using the fourth (4ω, 198 nm) and sixth (6ω, 133 nm) harmonics of a femtosecond Ti:sapphire laser. The 1B2 state of CS2 was prepared with the 4ω pulses, and subsequent dynamics were probed using the 6ω vacuum ultraviolet (VUV) pulses. The VUV pulses enabled real-time detection of S(1D2) photofragments, produced via CS2*(1B2(1Σu+)) → CS(X 1Σ+) + S(1D2). The photoionization signal of dissociating CS2*(1B2(1Σu+)) molecules starts to decrease at about 100 fs, while the S(1D2) fragments appear with a finite (ca. 400 fs) delay time after the pump pulse. Also discussed is the configuration interaction of the 1B2(1Σu+) state based on relative photoionization cross-sections to different cationic states.

AB - Ultrafast photodissociation dynamics from the 1B2(1Σu+) state of CS2 are studied by time-resolved photoelectron imaging using the fourth (4ω, 198 nm) and sixth (6ω, 133 nm) harmonics of a femtosecond Ti:sapphire laser. The 1B2 state of CS2 was prepared with the 4ω pulses, and subsequent dynamics were probed using the 6ω vacuum ultraviolet (VUV) pulses. The VUV pulses enabled real-time detection of S(1D2) photofragments, produced via CS2*(1B2(1Σu+)) → CS(X 1Σ+) + S(1D2). The photoionization signal of dissociating CS2*(1B2(1Σu+)) molecules starts to decrease at about 100 fs, while the S(1D2) fragments appear with a finite (ca. 400 fs) delay time after the pump pulse. Also discussed is the configuration interaction of the 1B2(1Σu+) state based on relative photoionization cross-sections to different cationic states.

KW - photodissociation dynamics

KW - photoelectron spectroscopy

KW - pump-probe experiments

KW - carbon disulphide

KW - photoelectron imaging

KW - photoionization

KW - vacuum

KW - ultraviolet

KW - photfragmnets

KW - photoabsorption spectrum

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DO - 10.1063/1.4982219

M3 - Article

SN - 0021-9606

VL - 147

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 1

M1 - 013932

ER -

Real-time detection of S(1D2) photofragments produced from the 1B2(1Σu+) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses

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