Seftelis I, Nicolaou G, Trassanidis S, Tsagas F N
Demokritus University of Thrace, School of Engineering, Department of Electrical and Computer Engineering, Laboratory of Nuclear Technology, Vas. Sofias 12, 67100 Xanthi, Greece.
J Environ Radioact. 2007;97(2-3):116-23. doi: 10.1016/j.jenvrad.2007.03.007. Epub 2007 May 2.
The diurnal variation of the gross alpha (alpha) radioactivity in the air near the ground and the gamma (gamma) radioactivity emitted from the ground have been monitored in North-eastern Greece. Meteorological information comprising air temperature and humidity has been simultaneously recorded. Over a period of the 24h of a typical day, the variation of alpha-radioactivity reaches a peak in the morning followed by a remarkable decrease, rising to a second peak in the afternoon. Furthermore, its significant dependence on the air temperature and humidity is confirmed, rising with an increase in humidity and decrease in temperature. The variation of the ground gamma-radioactivity follows that of the air alpha-radioactivity. A mathematical model has been developed to describe the diurnal variation of the alpha-radioactivity in the air near the ground in terms of the above meteorological variables and ground level gamma-radioactivity.
在希腊东北部，对地面附近空气中总α放射性以及地面发射的γ放射性的日变化进行了监测。同时记录了包括气温和湿度在内的气象信息。在典型一天的24小时内，α放射性的变化在早晨达到峰值，随后显著下降，下午又升至第二个峰值。此外，证实了其对气温和湿度的显著依赖性，随湿度增加和温度降低而升高。地面γ放射性的变化与空气中α放射性的变化一致。已开发出一个数学模型，根据上述气象变量和地面γ放射性来描述地面附近空气中α放射性的日变化。
