title: Determination of dose distribution of cosmic radiation behind different shielding thicknesses.
abstract: Investigations are described for the determination of dose distributions of cosmic radiation behind different shielding thicknesses. For this purpose, ultra-thin thermoluminescent detectors on a base of CaF2-polytetrafluorethylene (PTFE) were prepared and arranged in a stack at the outer wall of the biosatellite Cosmos 1887. During the 13 days of flight in a near-Earth orbit, the detectors were exposed to the unshielded cosmic radiation. After the flight, the dose distribution in the stack was determined by successive evaluations of the CaF2-PTFE discs. In the upper layers of the detector arrangement, dose values up to 100 Gy were observed. The strong decrease of the dose within a few mm demonstrates that weak particle radiation is dominant in the radiation field under investigation.
authors.affiliation: Technische Universitat Dresden, Sektion Physik, GDR.
authors.forename: P
authors.initials: P
authors.lastname: Schmidt
authors.forename: J
authors.initials: J
authors.lastname: Fellinger
authors.forename: K
authors.initials: K
authors.lastname: Hubner
mesh_terms: D002124:Calcium Fluoride; D003359:Cosmic Radiation; D011138:Polytetrafluoroethylene; D011829:Radiation Dosage; D011835:Radiation Protection; D013026:Space Flight / Q000295:instrumentation*; D018531:Spacecraft / Q000295:instrumentation; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation*
chemical_list: D011138:Polytetrafluoroethylene; D002124:Calcium Fluoride