Radiation exposure from a pillow was analyzed. According to an advertisement of the pillow, this radioactive consumer product contains enough amounts of radioactive materials to induce radiation hormesis effects. The pillow consists of the filling chips made from kneading mineral ores and the polynosic lining contains natural radioactive ores. Aγ-ray analysis of the pillow using pureGe-MCA reveals that there exist radioactivities of thorium and uranium series mixtures in it at concentration of 0.58% by the weight. The observations of a chip surface by a scanning electron microscope show that the shapes of two sides are different each other. There are lots of sharp protuberances on the outside of the chip. To determine the direct external exposures from the pillow, film badges were placed on the pillow for 210hand2555h.The dose equivalents of 210hexposure was under 0.1mSvwhich is a detection limit ofa γ-ray by the film badges. However, that of 2555hexposure was over 0.1mSvless than 0.15mSv. Quantities of internal exposures from inhalation of the vaporizedRnwere measured by a Lucas Cell. It was 79Bq/m3.There is no necessity for anxious about being broken in health inhaling theRn-gass.
X-Ray fluorescence analysis is well recognized as an effective tool for archaeometric analysis. For examples elemental compositions provide the researchers with basic information on the materials involved in the cultural properties under study and thus provide a clue to its historical background. The same information is also essential when the conservators try to preserve cultural properties. In this paper we studied a portable and inexpensive system for X-ray fluorescence analysis, making use of a smallSi-PIN diode spectrometer. The system is convenient for the study of cultural properties in the outdoors.