Radioactive ion

摘要

The present invention relates to a method for implantation of Xe isotopes in a matrix for production of <Sup>125</Sup>I sources that do not shed radioactive atoms. <Sup>125</Sup>Xe implanted at 12kV in steel, titanium and gold does not evol ve after more than 10 half-lives (380h) and <Sup>125</Sup>I from the decay of implanted <Sup>125</Sup>Xe is equally stable for 2 half-lives (120d). The matrix having radioxenon implanted is useful as a medical device, for instance as a "seed" for radiotherapeutic uses or in production of stents. Methods of treatment utilizing such devices are also encompassed by the present invention.