| Author | Alemayehu, Bemnet |
| Title | Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring |
| URL | http://hdl.handle.net/1957/42388  |
| Publication Date | 2013 |
| Date Available | 2013-09-10 15:45:27 |
| Date Accessioned | 2013-09-10 15:45:27 |
| Degree | PhD |
| Discipline/Department | Radiation Health Physics |
| Degree Level | doctoral |
| University/Publisher | Oregon State University |
| Abstract | Radioxenon detection is a technique used to monitor nuclear explosion and verify the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Because of an ultra-low concentration of radioxenon at radioxenon monitoring stations, radioxenon detection systems must have high sensitivity. This sensitivity is measured in terms of detector's minimum detectable concentration (MDC). It is required that radioxenon monitoring systems should have a MDC of less than or equal to 1 mBq/m³ for ¹³³Xe. A Well-type Actively Shielded Phoswich Detector (WASPD) for radioxenon detection was designed and assembled at the Radiation Detection and Dosimetry lab at Oregon State University. The active shielding mechanism is integrated into the phoswich detector to improve the MDC of the radioxenon by reducing unwanted background events. Anode pulses were processed using a user programmable digital pulse processor. All digital processing functions were implemented in a FPGA device in real-time. The detector was characterized for different radioxenon isotopes. MDC calculation of the detector showed that the results are close or below 1 mBq/m³ for all radioxenon isotopes. |
| Subjects/Keywords | Digital pulse shape discrimination; Xenon – Isotopes – Measurement |
| Contributors | Farsoni, Abdollah T. (advisor); Hamby, David M. (committee member) |
| Language | en |
| Country of Publication | us |
| Record ID | handle:1957/42388 |
| Repository | oregonstate |
| Date Indexed | 2017-03-17 |
| Grantor | Oregon State University |
| Issued Date | 2013-08-15 00:00:00 |
| Note | [] Graduation date: 2014; [peerreview] no; |
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…stable xenon gas at the TRIGA reactor of the Oregon State University; and Calculate the MDC of the detector for the four radioxenon isotopes and compare it with other radioxenon detectors 14 2. Survey of Literature 2.1 Radioxenon There are…
