Photo-desorbed species produced by the UV/EUV irradiation of an H                          2                         O:CO                         2                         :NH                         3                          ice mixture

Y. J. Chen; M. Nuevo; C. C. Chu; Y. G. Fan; T. S. Yih; W. H. Ip; H. S. Fung; C. Y.R. Wu

doi:10.1016/j.asr.2010.12.018

Photo-desorbed species produced by the UV/EUV irradiation of an H ₂ O:CO ₂ :NH ₃ ice mixture

Y. J. Chen, M. Nuevo, C. C. Chu, Y. G. Fan, T. S. Yih, W. H. Ip, H. S. Fung, C. Y.R. Wu

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

9 Scopus citations

Abstract

An H ₂ O:CO ₂ :NH ₃ = 1:1:1 ice mixture, used as a model mixture for cometary and interstellar ices, was irradiated with ultraviolet (UV)/extreme ultraviolet (EUV) photons in the broad 4-20 eV (62-310 nm) energy range at 16 K. The desorbed species were detected in situ by mass spectrometry during photo-irradiation, and a quartz microbalance was used as a substrate to measure the mass of material remaining on the surface. The total mass desorption for this H ₂ O:CO ₂ :NH ₃ = 1:1:1 ice mixture at 16 K was measured to be 1.8 × 10 ^-18 μg photon ^-1 , which is comparable to the 1.5 × 10 ^-18 μg photon ^-1 measured for pure H ₂ O ice irradiated under the same conditions. The main desorbed species produced during the photolysis of the ices were H ₂ , NH ₂ ^• , OH ^• , CO, and O ₂ , along with the starting components H ₂ O, NH ₃ , and CO ₂ . We also tentatively assigned minor mass peaks to larger species such as OCN ^• /OCN ^- , HNCO, CH ₄ , H ₂ CO, CH ₃ OH, and HCOOH. This result supports the scenario in which complex organic molecules can be formed in cometary and/or astrophysical ices and desorbed to the gas phase, and helps to better understand the photochemical processes occurring at the surface of Solar System icy bodies such as comets, as well as in cold astrophysical environments such as star-forming regions and protostars.

Original language	English
Pages (from-to)	1633-1644
Number of pages	12
Journal	Advances in Space Research
Volume	47
Issue number	9
DOIs	https://doi.org/10.1016/j.asr.2010.12.018
State	Published - 3 May 2011

Keywords

Comets
ISM
Ices
Photo-desorption
Prebiotic chemistry

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Chen, Y. J., Nuevo, M., Chu, C. C., Fan, Y. G., Yih, T. S., Ip, W. H., Fung, H. S., & Wu, C. Y. R. (2011). Photo-desorbed species produced by the UV/EUV irradiation of an H ₂ O:CO ₂ :NH ₃ ice mixture Advances in Space Research, 47(9), 1633-1644. https://doi.org/10.1016/j.asr.2010.12.018

Chen, Y. J. ; Nuevo, M. ; Chu, C. C. et al. / Photo-desorbed species produced by the UV/EUV irradiation of an H ₂ O:CO ₂ :NH ₃ ice mixture In: Advances in Space Research. 2011 ; Vol. 47, No. 9. pp. 1633-1644.

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title = " Photo-desorbed species produced by the UV/EUV irradiation of an H 2 O:CO 2 :NH 3 ice mixture ",

abstract = " An H 2 O:CO 2 :NH 3 = 1:1:1 ice mixture, used as a model mixture for cometary and interstellar ices, was irradiated with ultraviolet (UV)/extreme ultraviolet (EUV) photons in the broad 4-20 eV (62-310 nm) energy range at 16 K. The desorbed species were detected in situ by mass spectrometry during photo-irradiation, and a quartz microbalance was used as a substrate to measure the mass of material remaining on the surface. The total mass desorption for this H 2 O:CO 2 :NH 3 = 1:1:1 ice mixture at 16 K was measured to be 1.8 × 10 -18 μg photon -1 , which is comparable to the 1.5 × 10 -18 μg photon -1 measured for pure H 2 O ice irradiated under the same conditions. The main desorbed species produced during the photolysis of the ices were H 2 , NH 2 • , OH • , CO, and O 2 , along with the starting components H 2 O, NH 3 , and CO 2 . We also tentatively assigned minor mass peaks to larger species such as OCN • /OCN - , HNCO, CH 4 , H 2 CO, CH 3 OH, and HCOOH. This result supports the scenario in which complex organic molecules can be formed in cometary and/or astrophysical ices and desorbed to the gas phase, and helps to better understand the photochemical processes occurring at the surface of Solar System icy bodies such as comets, as well as in cold astrophysical environments such as star-forming regions and protostars.",

keywords = "Comets, ISM, Ices, Photo-desorption, Prebiotic chemistry",

author = "Chen, {Y. J.} and M. Nuevo and Chu, {C. C.} and Fan, {Y. G.} and Yih, {T. S.} and Ip, {W. H.} and Fung, {H. S.} and Wu, {C. Y.R.}",

note = "Funding Information: We are grateful for the support of the staff of the National Synchrotron Radiation Research Center (NSRRC) in Hsinchu, Taiwan. This work was partly supported by the Ministry of Education of Taiwan under the Aim for the Top University Program (NCU), and based on the work supported by the NSC Grant # NSC-96-2112-M-008-010-MY3 and the US NSF Planetary Astronomy Program under Grant AST-0604455 (C.-Y.R.W.).",

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doi = "10.1016/j.asr.2010.12.018",

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Chen, YJ, Nuevo, M, Chu, CC, Fan, YG, Yih, TS, Ip, WH, Fung, HS & Wu, CYR 2011, ' Photo-desorbed species produced by the UV/EUV irradiation of an H ₂ O:CO ₂ :NH ₃ ice mixture ', Advances in Space Research, vol. 47, no. 9, pp. 1633-1644. https://doi.org/10.1016/j.asr.2010.12.018

Photo-desorbed species produced by the UV/EUV irradiation of an H ₂ O:CO ₂ :NH ₃ ice mixture . / Chen, Y. J.; Nuevo, M.; Chu, C. C. et al.

In: Advances in Space Research, Vol. 47, No. 9, 03.05.2011, p. 1633-1644.

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

TY - JOUR

T1 - Photo-desorbed species produced by the UV/EUV irradiation of an H 2 O:CO 2 :NH 3 ice mixture

AU - Chen, Y. J.

AU - Nuevo, M.

AU - Chu, C. C.

AU - Fan, Y. G.

AU - Yih, T. S.

AU - Ip, W. H.

AU - Fung, H. S.

AU - Wu, C. Y.R.

N1 - Funding Information: We are grateful for the support of the staff of the National Synchrotron Radiation Research Center (NSRRC) in Hsinchu, Taiwan. This work was partly supported by the Ministry of Education of Taiwan under the Aim for the Top University Program (NCU), and based on the work supported by the NSC Grant # NSC-96-2112-M-008-010-MY3 and the US NSF Planetary Astronomy Program under Grant AST-0604455 (C.-Y.R.W.).

PY - 2011/5/3

Y1 - 2011/5/3

N2 - An H 2 O:CO 2 :NH 3 = 1:1:1 ice mixture, used as a model mixture for cometary and interstellar ices, was irradiated with ultraviolet (UV)/extreme ultraviolet (EUV) photons in the broad 4-20 eV (62-310 nm) energy range at 16 K. The desorbed species were detected in situ by mass spectrometry during photo-irradiation, and a quartz microbalance was used as a substrate to measure the mass of material remaining on the surface. The total mass desorption for this H 2 O:CO 2 :NH 3 = 1:1:1 ice mixture at 16 K was measured to be 1.8 × 10 -18 μg photon -1 , which is comparable to the 1.5 × 10 -18 μg photon -1 measured for pure H 2 O ice irradiated under the same conditions. The main desorbed species produced during the photolysis of the ices were H 2 , NH 2 • , OH • , CO, and O 2 , along with the starting components H 2 O, NH 3 , and CO 2 . We also tentatively assigned minor mass peaks to larger species such as OCN • /OCN - , HNCO, CH 4 , H 2 CO, CH 3 OH, and HCOOH. This result supports the scenario in which complex organic molecules can be formed in cometary and/or astrophysical ices and desorbed to the gas phase, and helps to better understand the photochemical processes occurring at the surface of Solar System icy bodies such as comets, as well as in cold astrophysical environments such as star-forming regions and protostars.

AB - An H 2 O:CO 2 :NH 3 = 1:1:1 ice mixture, used as a model mixture for cometary and interstellar ices, was irradiated with ultraviolet (UV)/extreme ultraviolet (EUV) photons in the broad 4-20 eV (62-310 nm) energy range at 16 K. The desorbed species were detected in situ by mass spectrometry during photo-irradiation, and a quartz microbalance was used as a substrate to measure the mass of material remaining on the surface. The total mass desorption for this H 2 O:CO 2 :NH 3 = 1:1:1 ice mixture at 16 K was measured to be 1.8 × 10 -18 μg photon -1 , which is comparable to the 1.5 × 10 -18 μg photon -1 measured for pure H 2 O ice irradiated under the same conditions. The main desorbed species produced during the photolysis of the ices were H 2 , NH 2 • , OH • , CO, and O 2 , along with the starting components H 2 O, NH 3 , and CO 2 . We also tentatively assigned minor mass peaks to larger species such as OCN • /OCN - , HNCO, CH 4 , H 2 CO, CH 3 OH, and HCOOH. This result supports the scenario in which complex organic molecules can be formed in cometary and/or astrophysical ices and desorbed to the gas phase, and helps to better understand the photochemical processes occurring at the surface of Solar System icy bodies such as comets, as well as in cold astrophysical environments such as star-forming regions and protostars.

KW - Comets

KW - ISM

KW - Ices

KW - Photo-desorption

KW - Prebiotic chemistry

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U2 - 10.1016/j.asr.2010.12.018

DO - 10.1016/j.asr.2010.12.018

M3 - 期刊論文

AN - SCOPUS:79953030126

SN - 0273-1177

VL - 47

SP - 1633

EP - 1644

JO - Advances in Space Research

JF - Advances in Space Research

IS - 9

ER -

Chen YJ, Nuevo M, Chu CC, Fan YG, Yih TS, Ip WH et al. Photo-desorbed species produced by the UV/EUV irradiation of an H ₂ O:CO ₂ :NH ₃ ice mixture Advances in Space Research. 2011 May 3;47(9):1633-1644. doi: 10.1016/j.asr.2010.12.018

Photo-desorbed species produced by the UV/EUV irradiation of an H 2 O:CO 2 :NH 3 ice mixture

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Keywords

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Photo-desorbed species produced by the UV/EUV irradiation of an H ₂ O:CO ₂ :NH ₃ ice mixture