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(¹Σ_u⁺) state of CS₂ by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses

Takuya Horio, Roman Spesyvtsev, Yu Furumido, Toshinori Suzuki

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Ultrafast photodissociation dynamics from the ¹B₂(¹Σ_u⁺) 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(¹Σ_u⁺)) → CS(X¹Σ⁺) + S(¹D₂). The photoionization signal of dissociating CS₂*(¹B₂(¹Σ_u⁺)) 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(¹Σ_u⁺) state based on relative photoionization cross-sections to different cationic states.

Original language	English
Article number	013932
Journal	Journal of Chemical Physics
Volume	147
Issue number	1
DOIs	https://doi.org/10.1063/1.4982219
Publication status	Published - Jul 7 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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@article{e9626413c53b4244bdfe7a1642152ccd,

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(X1Σ+) + 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.",

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

note = "Funding Information: This work was supported by JSPS KAKENHI Grant Nos. 15H05753 and 15K05388. The authors thank Dr. Y.-I. Suzuki for helpful discussions. Publisher Copyright: {\textcopyright} 2017 Author(s).",

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doi = "10.1063/1.4982219",

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T1 - 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

AU - Horio, Takuya

AU - Spesyvtsev, Roman

AU - Furumido, Yu

AU - Suzuki, Toshinori

PY - 2017/7/7

Y1 - 2017/7/7

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(X1Σ+) + 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(X1Σ+) + 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.

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

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