【摘要】 <正>前 言α卡法是一种累积测氡的放射性勘探方法。在放射性勘探的各种方法中，γ测量一直处于主导地位。近年来，α测量进行累积法测氡受到了人们的重视。然而径迹测量和²¹⁰Po法都有一个烦琐的化学处理过程，周期长，不能在野外及时绘出结果，成本较高，从而促使人们探索更适合野外使用的α测量方法。更多还原

【Abstract】 AbstractTlie a-card method, using a metal or plastic card buried underground for a considerable length of time to collect radon products by adsorption affect, and then using a special instrument to detect the a-radiation, is being increasingly applied to radioactive exploration for discovering very "faint radioactive anomalies. The collection of radon products on precipitators can be enhanced by applying a negative charge, but it complicates the equipment. The a-card method using electrostatic materials as precipitators solves this problem to a large extent. A kind of portable a-scintillator with a large area ZnS (Ag) scin-tillator has been developed by the authors. This method has been prelimina-rily applied in the search for uranium, underground water and cracks of dam. The comparison of it with other geophysical methods shows that it can be conveniently adopted and satisfactory results can be obtained with the advantages of high sensitivity (several times that of a-precipatator method), reliability, simplicity, efficiency and low cost.更多还原