引言本文对由于天然和长寿命放射性同位素体內沉积而引起的标准人平均剂量率进行了估算。这里说的天然放射性同位素包括α,β和γ发射体。对各同位素的K俘获和内转换伴随的X线,内外轫致幅射及α反冲原子等对剂量小的贡献也进行了考 INTRODUCTION This article estimates the standard human mean dose rate due to in vivo deposition of natural and long-lived radioisotopes. The natural radioisotopes referred to herein include alpha, beta and gamma emitters. K isotopes of K capture and internal conversion accompanied by X-ray, internal and external Xray radiation and α recoil atoms were also made on the contribution of a small dose