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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Alpha emitter detection systems using a UV light detector.

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    A new system detects alpha contamination by visualizing UV light from ionized nitrogen, enabling remote identification of radioactive spots in dark settings. This technology aids in rapid contamination assessment and safety monitoring.

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    Area of Science:

    • Nuclear Physics
    • Radiation Detection
    • Environmental Monitoring

    Background:

    • Alpha contamination poses significant health and environmental risks.
    • Existing detection methods can be limited in range and sensitivity, especially in low-light conditions.
    • Visualizing alpha particle interactions is crucial for effective contamination mapping.

    Purpose of the Study:

    • To develop and evaluate a novel system for visualizing alpha contamination.
    • To enable detection of alpha-induced ultraviolet (UV) light from a distance.
    • To facilitate rapid identification of contaminated areas in dark environments.

    Main Methods:

    • Development of an alpha-particle detection system utilizing a photomultiplier tube.
    • Detection of UV light emitted by ionized nitrogen, a byproduct of alpha particle interactions.
    • Design and testing of large-diameter lenses to enhance light collection and spatial resolution.
    • System evaluation in dark environments for alpha contamination visualization.

    Main Results:

    • The developed system successfully detects alpha-induced UV lights from several meters away.
    • The use of a photomultiplier tube allows for sensitive detection of low-intensity UV signals.
    • Large-diameter lenses improved the ability to pinpoint the location of alpha contamination.
    • The system demonstrated effectiveness in dark environments for visualizing contamination.

    Conclusions:

    • The novel alpha-particle detection system provides a viable method for remote visualization of alpha contamination.
    • The system's capability to detect UV light from ionized nitrogen offers a unique approach to contamination monitoring.
    • The use of optimized optics enhances the system's practical application for rapid identification of contaminated spots.