Moisture proof columnar Cesium Iodide (CsI) layers for gas avalanche microdetectors

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Cesium iodide columnar layers having a diameter of 3 {micro}m, and wall spacing of {approx} 1 {micro}m act as secondary electron emitters and can be used for detection of radiation: charged particles, X-rays and gamma rays. With a large enough electric field across the columnar layers, {approx} 400 {micro}m in thickness, gas avalanche gain is evident when placed in a suitable gas, such as P10 or argon-ethane mixtures. The cesium iodide columns are damaged by ambient moisture. This damage can be prevented by evaporating protective layers of insoluble, low boiling point inorganic materials, such as mercuric iodide. Columnar layers with ... continued below

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5 pages; OS: Windows

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Park, I.J.; Cho, H.S.; Hong, W.S.; Perez-Mendez, V. & Kadyk, J. May 5, 1999.

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Description

Cesium iodide columnar layers having a diameter of 3 {micro}m, and wall spacing of {approx} 1 {micro}m act as secondary electron emitters and can be used for detection of radiation: charged particles, X-rays and gamma rays. With a large enough electric field across the columnar layers, {approx} 400 {micro}m in thickness, gas avalanche gain is evident when placed in a suitable gas, such as P10 or argon-ethane mixtures. The cesium iodide columns are damaged by ambient moisture. This damage can be prevented by evaporating protective layers of insoluble, low boiling point inorganic materials, such as mercuric iodide. Columnar layers with 20 nm coatings of mercuric iodide yield more than 30,000 electrons on average when traversed by electrons from a {sup 90}Sr beta source.

Physical Description

5 pages; OS: Windows

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INIS; OSTI as DE00767507

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  • IEEE 1998 Nuclear Science Symposium, Toronto, Ontario (CA), 11/10/1998--11/12/1998

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  • Report No.: LBNL--42566
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 767507
  • Archival Resource Key: ark:/67531/metadc717473

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  • May 5, 1999

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  • Sept. 29, 2015, 5:31 a.m.

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  • Sept. 1, 2016, 7:13 p.m.

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Park, I.J.; Cho, H.S.; Hong, W.S.; Perez-Mendez, V. & Kadyk, J. Moisture proof columnar Cesium Iodide (CsI) layers for gas avalanche microdetectors, article, May 5, 1999; California. (digital.library.unt.edu/ark:/67531/metadc717473/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.