发现放射性同位素已经逐渐深入到人们的生活中。它已经跑出了科学实验室的大门,变成了工农业生产者、医疗工作者手中的有力武器,它不但可用来研究一些理论问题,而且可用来解决许多实际问题。如果说目前大家对它还有些生疏,那末不久就会象我们今天对“爱克斯光”或“无线电”那么熟悉。放射性同位素实在说来不是一种十分新鲜的东西。早在上世纪末,法国科学家贝克勒耳就发现了所谓放射性的现象,接着居里夫妇发现了一种有放射性的新物质叫镭,从前人们也叫它镭锭。镭锭用在医学上可以治疗癌肿。这其实就是放射性同位素的一种应用。只是这一类放射性物质得来很不容易,因此应用也受到限制。1934年,约里奥—居里夫妇发现了人工放射现象,人们可以用人工方法制成某些 Found that radioactive isotopes have gradually deepened into people’s lives. It has come out of the door of science laboratories and becomes a powerful weapon in the hands of workers, agricultural producers and medical workers. It can be used not only to study some theoretical problems but also to solve many practical problems. If at the moment everyone is unfamiliar with it, it will soon be as familiar to us today as X-ray or radio. Radioactive isotopes are not really very fresh things. As early as the end of the last century, the French scientist Becquerel discovered the so-called radioactive phenomenon. Then the couple of Curie discovered a radioactive new substance called radium, which people used to call it. Radix used in medicine can cure cancer. This is actually an application of radioisotopes. Only this type of radioactive material is not easy, so the application is also limited. In 1934, Joel-Curie found the phenomenon of artificial radiation, people can make some artificial methods