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Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory Title Moisture proof columnar Cesium Iodide ( CsI ) layers for gas avalanche microdetectors Permalink
| Content Provider | Semantic Scholar |
|---|---|
| Author | Microdetectors Park, Il Jeong Cho, Hyung Suck Seok, Won Perez-Mendez, Victor Kadyk, John Amos |
| Copyright Year | 2004 |
| Abstract | Cesium iodide columnar layers having a diameter of ≈ 3 μm, and wall spacing of ≈ 1 μm 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, ≈ 400 μm 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 Sr beta source. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cloudfront.escholarship.org/dist/prd/content/qt6v06p26r/qt6v06p26r.pdf?t=lnqplp |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
