TY - JOUR
T1 - Laboratory surface astrochemistry experiments
AU - Frankland, Victoria
AU - Rosu-Finsen, Alexander
AU - Lasne, Jerome
AU - Collings, Mark P
AU - McCoustra, Martin R S
N1 - "V.L.F., M.P.C., and M.R.S.M. acknowledge the support of the UK Engineering and Physical Sciences Research Council (EPSRC, EP/D506158/1). A.R.F. thanks HWU for
a James Watt scholarship. J.L. acknowledges funding from the European Community FP7-ITN Marie-Curie Programme (LASSIE project, Grant Agreement No. 238258)."
PY - 2015/5
Y1 - 2015/5
N2 - Although several research groups have studied the formation of H2 on interstellar dust grains using surface science techniques, few have explored the formation of more complex molecules. A small number of these reactions produce molecules that remain on the surface of interstellar dust grains and, over time, lead to the formation of icy mantles. The most abundant of these species within the ice is H2O and is of particular interest as the observed molecular abundance cannot be accounted for using gas-phase chemistry alone. This article provides a brief introduction to the astronomical implications and motivations behind this research and the requirement for a new dual atomic beam ultrahigh vacuum apparatus system. Further details of the apparatus design, characterisation and calibration of the system are provided along with preliminary data from atomic O and O2 beam dosing on bare silica substrate and subsequent temperature programmed desorption measurements. The results obtained in this ongoing research may enable more chemically-accurate surface formation mechanisms to be deduced for this and other species before simulating the kinetic data under interstellar conditions.
AB - Although several research groups have studied the formation of H2 on interstellar dust grains using surface science techniques, few have explored the formation of more complex molecules. A small number of these reactions produce molecules that remain on the surface of interstellar dust grains and, over time, lead to the formation of icy mantles. The most abundant of these species within the ice is H2O and is of particular interest as the observed molecular abundance cannot be accounted for using gas-phase chemistry alone. This article provides a brief introduction to the astronomical implications and motivations behind this research and the requirement for a new dual atomic beam ultrahigh vacuum apparatus system. Further details of the apparatus design, characterisation and calibration of the system are provided along with preliminary data from atomic O and O2 beam dosing on bare silica substrate and subsequent temperature programmed desorption measurements. The results obtained in this ongoing research may enable more chemically-accurate surface formation mechanisms to be deduced for this and other species before simulating the kinetic data under interstellar conditions.
UR - http://www.scopus.com/inward/record.url?scp=84929379086&partnerID=8YFLogxK
U2 - 10.1063/1.4919657
DO - 10.1063/1.4919657
M3 - Article
C2 - 26026554
AN - SCOPUS:84929379086
SN - 0034-6748
VL - 86
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
IS - 5
M1 - 055103
ER -