Determinations of specific activity concentrations for Uranium-238, Thorium-232 and Potassium-40 in 10 commercial phosphate fertilizers samples from various countries (Iraq, Iran, Jordan, Kingdom Saudi Arabia, Italy Turkey) were accomplished by the use high purity germanium detector device. Radiation hazard indices [(Annual Effective Dose Equivalent) in, (Annual out, Equivalent Activity Radium,...

The Lawrence Livermore National Laboratory (LLNL) phantom was developed to calibrate lung counting systems that are used to estimate plutonium and other low energy photon emitting radionuclides deposited in the lung. Originally, low energy photon counting systems consisted of sodium iodide or phoswich detectors, but they have been largely replaced by smaller germanium detector arrays. The avera...

DRS Sensors & Targeting Systems, supported by detector materials supplier Lawrence Semiconductor Research Laboratory, is developing far-infrared detectors jointly with NASA Langley under the Far-IR Detector Technology Advancement Partnership (FIDTAP). The detectors are intended for spectral characterization of the Earth’s energy budget from space. During the first year of this effort we have de...

Nondestructive assay of gamma-ray emitting nuclear waste requires modeling because it is not practical to prepare a standard that matches the physical and nuclear properties of every waste item. The use of a high-purity germanium (HPGe) detector simplifies the spectral analysis process. Many models use simplified efficiency determinations and attenuation corrections. These models often work wel...

Semiconductor gamma and X-ray detectors are finding increase use in medicine, industry, astronomy and national security. Conventional semiconductors consist mainly of germanium and silicon. Their use has however become marginalised in an increasing number of applications due to their physical limitations such as low detection efficiency and the need for bulky cryogenics. Detectors based on wide...

Germanium-on-silicon photodetectors have been heavily investigated in recent years as a key component of CMOS-compatible integrated photonics platforms. It has previously been shown that detector bandwidths could theoretically be greatly increased with the incorporation of a carefully chosen inductor and capacitor in the photodetector circuit. Here, we show the experimental results of such a ci...