以有限面源和单点源代替无限面源标定航测仪

阐述了在地面标定航测仪时，根据γ射线的叠加原理和六边型面源特点，以有限面源代替无限面源，建立的计算公式和实测结果，以及在空中标定航测仪时，根据γ射线的互换原理，以单点源代替无限面源，建立的计算公式和实测结果。通过理论分析，算出了航测仪接收γ射线时晶体底侧面的接收比，得出底面接收γ射线随高度是按金格函数规律衰减的数学表达式，并按该规律根据底面接收计数率的（按接收比由底侧面接收总计数率中分出的）地、空

Calibrate the Aerial Surveying Instrument by the Limited Suface Source and the Single Point Source that Replace the Unlimited Surface Source

It is described that the calculating formula and surveying result is found on the basis of the stacking principle of gamma ray and the feature of hexagonal surface source when the limited surface source replaces the unlimited surface source to calibrate the aerial survey instrument on the ground, and that it is found in the light of the exchanged principle of the gamma ray when the single point source replaces the unlimited surface source to calibrate aerial surveying instrument in the air. Meanwhile through the theoretical analysis, the receiving rate of the crystal bottom and side surfaces is calculated when aerial surveying instrument receives gamma ray. The mathematical expression of the gamma ray decaying following height according to the Jinge function regularity is got. According to this regularity,the absorbing coefficient that air absorbs the gamma ray and the detective efficiency coefficient of the crystal is calculated based on the ground and air measuring value of the bottom surface receiving count rate(derived from total receiving count rate of the bottom and side surface).Finally, according to the measuring value, it is proved that imitating the change of total receiving gamma ray exposure rate of the bottom and side surfaces with this regularity in a certain high area is feasible.