Difference between revisions 2373490 and 2373851 on enwikiversity

[[Image:Detectors summary 3.png|thumb|right|250px|This tree diagram shows the relationship between types and classification of most common particle detectors. Credit: [[commons:User:Wdcf|Wdcf]].]]
'''Radiation detectors''' provide a signal that is converted to an electric current. The device is designed so that the current provided is proportional to the characteristics of the incident radiation.

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Similar to the way that a terrestrial gyrocompass uses a pendulum to sense local gravity and force its gyro into alignment with earth's spin vector, and therefore point north, an ''orbital gyrocompass'' uses a horizon sensor to sense the direction to earth's center, and a gyro to sense rotation about an axis normal to the orbit plane. Thus, the horizon sensor provides pitch and roll measurements, and the gyro provides yaw. See Tait-Bryan angles.

==Detector materials==


When irradiated by radiation of interest between gamma rays and radio waves the detector material emits photons. The material has good nuclear hardness (radiation hardness; i.e., parameters remaining stable up to 5 x 10<sup>4</sup> grays (Gys)), high scintillation efficiency, good energy resolution between 5 and 20 MeV for X-rays or gamma rays, is mechanical strong, not hygroscopic, relatively high melting point, e.g., 1050°C (bismuth germinate).

Some materials can operate at room temperature. For high performance gamma- and x-ray detectors high atomic number, large bandgap and high electron mobility (e.g., ~1100 cm<sup>2</sup>/V·s) result in high intrinsic µτ (mobility-lifetime) product and high degree of charge collection and excellent spectral resolution.⏎
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==Mercury tellurides==
[[Image:Coloradoite, Pyrite, Quartz-338840.jpg|thumb|right|250px|This coloradoite is from the La Plata District of Colorado. Credit: [[c:user:Robert M. Lavinsky|Robert M. Lavinsky]].{{tlx|free media}}]]
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{{tlx|Radiation astronomy resources}}{{Principles of radiation astronomy}}{{Sisterlinks|Radiation detectors}}

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