E. L. Doctorow.

Zins, Daniel L.; Parks, John G.

doi:10.2307/2926903

Cited by 1 publication

(2 citation statements)

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“…Thus, the OH radicals formed under our experimental conditions can further react with other species present in the system (Zins, Joshi & Krim 2011; see also Frost, Sharkey & Smith 1993;Lester et al 2000;.…”

Section: Determination Of a Peak Characteristic Of The Formation Of Omentioning

confidence: 64%

“…To this end, a preliminary study has shown that a peak of 3689 cm −1 , in combination with the observation of a structured water ice band centred at 3400 cm −1 , and CO 2 , is characteristic of hydrated OH radicals. Under our experimental conditions, CO 2 is generated from reactions between CO, present as an impurity in the system, and OH radicals (Zins, Joshi & Krim, 2011). Gaseous pure water or a water/RG (RG = He or Ne) mixture was subjected to a microwave discharge, and the species thus formed were then condensed on the surface of a mirror at different temperatures.…”

Section: S U M M a Rymentioning

confidence: 99%

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Production and isolation of OH radicals in water ice

Zins

Joshi

Krim

2011

Monthly Notices of the Royal Astronomical Society

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OH radicals may play an important role in reactions that take place on interstellar icy grain surfaces, due to their high reactivity. Unfortunately, laboratory experiments aiming at simulating such reactions are hindered by the high reactivity of these species. Indeed, a method to isolate and further study the reactivity of OH radicals is still missing. This paper presents a study we carried out to determine the best conditions to isolate OH radicals in water ice. OH radicals were produced using a microwave discharge from either pure gaseous water or a gaseous mixture containing diluted water. Species thus formed were further condensed on a cold mirror at temperatures ranging from 3.5 to 30 K. The samples were then probed with a Fourier transform infrared spectrometer. The dilution of water into a rare gas (He, Ne) was found to be the best way to form an ice containing a high proportion of OH radicals, especially at low temperatures. These conditions, namely low temperatures and low concentrations, allow for the cooling of species formed during the discharge and prevent radical recombination.

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Section: Determination Of a Peak Characteristic Of The Formation Of Omentioning

confidence: 64%

Section: S U M M a Rymentioning

confidence: 99%