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...
A real-time FPGA-based algorithm has been developed and tested to discriminate pulse-shapes, identify beta-gamma coincidence events and collect energy spectra from xenon radioisotopes using a phoswich detector. The detector consists of a thin plastic scintillator (BC-400) to detect beta and conversion electrons, a CsI(Tl) crystal for measuring X-rays and gamma-rays,...
A phoswich detector with two scintillation layers has been designed and assembled at Oregon State University. This detector is able to identify and reject Compton events and ultimately reduce the Compton continuum in gamma energy spectra. In this detector, CsI(Tl) crystal is used to primarily detect photoelectric events. The CsI(Tl)...
A phoswich detector with Compton suppression capability has been developed and tested for measuring xenon radioisotopes via a beta-gamma coincidence measurement technique. The phoswich detector has been designed with three scintillation layers. Beta-gamma coincidence events from radioxenon isotopes are identified when a coincidence energy absorption is detected in the first...
In sub-Saharan Africa (SSA), “maize is life,” due to its importance to food security and economic wellbeing. Around 40% of Africa’s maize-growing area faces occasional drought stress, resulting in yield losses of 10–25%. Around 25% of the maize crop suffers frequent drought, with losses of up to half the harvest....
Full Text:
Alemayehu4 & Ruth B. Madulu5
Received: 23 February 2015 /Accepted: 19 June 2015 /Published online: 4 July
In sub-Saharan Africa (SSA), “maize is life,” due to its importance to food security and economic wellbeing. Around 40% of Africa’s maize-growing area faces occasional drought stress, resulting in yield losses of 10–25%. Around 25% of the maize crop suffers frequent drought, with losses of up to half the harvest....
In sub-Saharan Africa (SSA), “maize is life,” due to its importance to food security and economic wellbeing. Around 40% of Africa’s maize-growing area faces occasional drought stress, resulting in yield losses of 10–25%. Around 25% of the maize crop suffers frequent drought, with losses of up to half the harvest....
In sub-Saharan Africa (SSA), “maize is life,” due to its importance to food security and economic wellbeing. Around 40% of Africa’s maize-growing area faces occasional drought stress, resulting in yield losses of 10–25%. Around 25% of the maize crop suffers frequent drought, with losses of up to half the harvest....
Small solid-state photomultipliers (SSPMs) are an alternative scintillator light-detection technology to traditional photomultiplier tubes that offer advantages such as lower bias voltages and insensitivity to magnetic fields. A digital spectrometer using a commercially available SSPM was constructed and characterized at Oregon State University as a prototype for small, highly-mobile, low-power,...
Fungi have long been a prolific source of clinically approved drugs. The antibiotic penicillin, the cholesterol lowering statins, and the immunosuppressant cyclosporine have changed the treatment of human diseases in the last century. Recently, genome analysis of filamentous fungi has revealed that the biosynthetic potential for natural product expression is...