Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

New alpha radiation detection systems for environmental surveys.

Siehe auch: Sensors and Actuators B

Giber, J.; Göpel, W.; Holmes, I.L.; Horvai, G.; Meixner, H.; Timar-Horvath, V. ; Budapesti Müszaki Egyetem, Eötvös Lorand Fizikai Tarsulat:
Eurosensors VII. Book of Abstracts
Budapest, 1993
Eurosensors <7, 1993, Budapest>
Fraunhofer IMS, Außenstelle Dresden ( IPMS) ()
Alpha-Strahlung; Halbleiterdetektor; Mikrosystemtechnik; Radon; Umwelttechnik

We report on the development of low-cost alpha-particle sensor systems for radon and radon daughter monitoring and dosimetry (Ealpha=5.5-7.9 MeV) and on the first application for environmental surveys. Using the experience of the MEGARAD-microsystem, we have developed an alpha-particle spectroscopic sensor array with special PMOS transistors in a floating n-well as sensor cells. 1024 sensor cells, the preamplifiers, the analog memories, a fast four-bit parallel A/D converter and the address-coding system are integrated on a single chip. The energy resolution for 5 MeV alpha particles is better than 300 keV. The dead time is smaller than 10 percent for up to 10 high 6 alpha particles per second and per square centimetre. The systems are tested in several radiation fields (neutron, proton, alpha, beta and gamma radiation). The efficiency of the alpha-radiation detection systems in radon-monitoring systems is proved in various applications.