Photoabsorption spectra of solid O2 in ultraviolet and far-vacuum ultraviolet region at 9-30 K

Jen Iu Lo; Hsiao Chi Lu; Wei Hsiu Hung; B. Sivaraman; N. J. Mason; Bing Ming Cheng

doi:10.1093/mnras/stae779

Photoabsorption spectra of solid O₂ in ultraviolet and far-vacuum ultraviolet region at 9-30 K

Jen Iu Lo, Hsiao Chi Lu, Wei Hsiu Hung, B. Sivaraman, N. J. Mason, Bing Ming Cheng^*

^*Corresponding author for this work

Department of Chemistry

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

Abstract

We report ultraviolet and far-vacuum ultraviolet (FUV) absorption spectra of solid molecular oxygen recorded over the wavelength region 110-365 nm for temperatures between 9 and 30 K, in which the light source was dispersed from a synchrotron. The UV/FUV spectra of solids O₂ deposited at various temperatures appeared distinctly different profiles due to variation of compositions of α-O₂, β-O₂, and the imperfect crystal structure at the specific temperature; in addition, the icy sample exhibited its own scattering curve deposited at specific temperature. Resolved from the thermal ramping technique, the absorption spectra of solids α-O₂ and β-O₂ were established in the wavelength region 110-250 nm at 9 and 30 K, respectively, for the first time.

Original language	English
Pages (from-to)	4818-4823
Number of pages	6
Journal	Monthly Notices of the Royal Astronomical Society
Volume	529
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stae779
Publication status	Published - 2024 Apr 1

Keywords

ISM: molecules
methods: laboratory: molecular
methods: laboratory: solid state
molecular data
ultraviolet: ISM

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1093/mnras/stae779

Cite this

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title = "Photoabsorption spectra of solid O2 in ultraviolet and far-vacuum ultraviolet region at 9-30 K",

abstract = "We report ultraviolet and far-vacuum ultraviolet (FUV) absorption spectra of solid molecular oxygen recorded over the wavelength region 110-365 nm for temperatures between 9 and 30 K, in which the light source was dispersed from a synchrotron. The UV/FUV spectra of solids O2 deposited at various temperatures appeared distinctly different profiles due to variation of compositions of α-O2, β-O2, and the imperfect crystal structure at the specific temperature; in addition, the icy sample exhibited its own scattering curve deposited at specific temperature. Resolved from the thermal ramping technique, the absorption spectra of solids α-O2 and β-O2 were established in the wavelength region 110-250 nm at 9 and 30 K, respectively, for the first time.",

keywords = "ISM: molecules, methods: laboratory: molecular, methods: laboratory: solid state, molecular data, ultraviolet: ISM",

author = "Lo, {Jen Iu} and Lu, {Hsiao Chi} and Hung, {Wei Hsiu} and B. Sivaraman and Mason, {N. J.} and Cheng, {Bing Ming}",

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.",

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doi = "10.1093/mnras/stae779",

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T1 - Photoabsorption spectra of solid O2 in ultraviolet and far-vacuum ultraviolet region at 9-30 K

AU - Lo, Jen Iu

AU - Lu, Hsiao Chi

AU - Hung, Wei Hsiu

AU - Sivaraman, B.

AU - Mason, N. J.

AU - Cheng, Bing Ming

PY - 2024/4/1

Y1 - 2024/4/1

N2 - We report ultraviolet and far-vacuum ultraviolet (FUV) absorption spectra of solid molecular oxygen recorded over the wavelength region 110-365 nm for temperatures between 9 and 30 K, in which the light source was dispersed from a synchrotron. The UV/FUV spectra of solids O2 deposited at various temperatures appeared distinctly different profiles due to variation of compositions of α-O2, β-O2, and the imperfect crystal structure at the specific temperature; in addition, the icy sample exhibited its own scattering curve deposited at specific temperature. Resolved from the thermal ramping technique, the absorption spectra of solids α-O2 and β-O2 were established in the wavelength region 110-250 nm at 9 and 30 K, respectively, for the first time.

AB - We report ultraviolet and far-vacuum ultraviolet (FUV) absorption spectra of solid molecular oxygen recorded over the wavelength region 110-365 nm for temperatures between 9 and 30 K, in which the light source was dispersed from a synchrotron. The UV/FUV spectra of solids O2 deposited at various temperatures appeared distinctly different profiles due to variation of compositions of α-O2, β-O2, and the imperfect crystal structure at the specific temperature; in addition, the icy sample exhibited its own scattering curve deposited at specific temperature. Resolved from the thermal ramping technique, the absorption spectra of solids α-O2 and β-O2 were established in the wavelength region 110-250 nm at 9 and 30 K, respectively, for the first time.

KW - ISM: molecules

KW - methods: laboratory: molecular

KW - methods: laboratory: solid state

KW - molecular data

KW - ultraviolet: ISM

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