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UV excited luminescence from crystalline H2O ice

✍ Scribed by T.I. Quickenden; R.A.J. Litjens; C.G. Freeman; S.M. Trotman

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
343 KB
Volume
114
Category
Article
ISSN
0009-2614

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✦ Synopsis

Deguwtmcnt of phyzicaz and .ikwrgant chetitry~ &krverdry of West-n Austr&z, Nedfands, iV.d. 6009. Ausi~&a Rccewed 10 October 1984; in fiial form 16 November 1984 W zmdiatcd ewsialline Hz0 ice emits two broad luminescence bands of low intensiry with peaksin the vicimty of 340 and 420 nm. These bands are predo~~tly excited by light in the vicinity of 220 and 255 nm. respectively_ The Iuminesfence and excitation spectra increase in height with irradiation trme and exhibit a memory effect when excitation is discontinued and recommenced at a later time. The 420 nm emission band and the 260 nm absorption band are attnbuted to the A 2E*-+ X 2~ transition of photolyticaJly produced OH radicals which accumulate in the lee lattice and which arc excited by the incident IJV Light.

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