| Abstract: | Since the gemma-ray spectrometry survey gives the information from soil on the surface,the influence, faetors related to the surface,such as the size,humidity of the media and the temperoture of circumstance,are very important.The analysis of the experimental curves shows that ,the larger the size of the madia,the lower is its gamma-field and the higher its attenuation ratio;with the increasing temperatureof the media, the absorbent of gamma- ray and the attentuation ratio increase. Furthermore,the choice of suitable season to carry out the gamma-ray spectrometrysurvey are also very important. |
