Natural Radiation Background in Metropolitan Taipei

• Published in: JOURNAL OF RADIATION RESEARCH Vol. 32; no. 2; pp. 165 - 174
• Main Authors: Weng, P S, Chu, T C, Chen, C F
• Format: Journal Article
• Language: English
• Published: England THE JAPAN RADIATION RESEARCH SOCIETY 1991; Oxford University Press
• Subjects: Background Radiation; Female; Gamma Rays; Humans; Iodine Radioisotopes - analysis; Kinetics; Male; Neutron Activation Analysis; Radiation Monitoring; Radon - analysis; Spectrum Analysis; Taiwan; Urban Health; Taiwan
• ISSN: 0449-3060; 1349-9157
• DOI: 10.1269/jrr.32.165

A high-pressure ionization chamber was used to measure the natural background radiation in metropolitan Taipei, Taiwan, R. O. C. during a period in 1987-1988. The average exposure rate was 27. 55×10-10 C kg－1 h－1 including cosmic radiation, but the radon contribution was excluded. Scintillation survey meter, gamma-ray spectroscopy for soil samples, in-situ measurement with a NaI(Tl) detector coupled to a portable multichannel analyzer, instrumental neutron activation analysis of rock samples, and even thermoluminescent dosimeters were used as complementary measuring devices. Areas of higher radiation background were detected. They are the radium-bearing Peitou stones, an unusual occurrence of uraniferous zone at Sanhsia, and uranium precipitation in the glassy olivine basalt in a tea field at Tachi. All these areas are located in suburban sites of Taipei. Three types of building in Taipei City were selected for radon detection. No significantly elevated level of radon was detected, since Taipei is located in a semitropical area where ventilation of buildings is not a problem.