文章以原子物理学中的射线衰减方程为基础,用直接X射线方法,采用三种不同能量的X射线源,对红松、杨树、桦树、水曲柳、高山栎五种树木样品进行了质量衰减系数和微密度的测定。结果表明:该方法是可行的,测定精度也是较高的。 Based on the ray attenuation equation in atomic physics, three kinds of tree samples of Korean pine, poplar, birch, ash and alpine oak were studied by using direct X-ray method and three different energy X-ray sources. The determination of mass attenuation coefficient and micro density. The results show that this method is feasible and the measurement accuracy is also high.