Apparatus for injecting a substance into a reaction vessel

Apparatus for injecting a radioactive sample of a substance into a pressurized reaction chamber comprising:

• a radioactive sample;
• a generally tubular first container having first and second open ends, and containing said radio-active sample;
• a generally tubular, pressure-resistant second container having first and second ends and first interior space for receiving the first container, the second container including;
• a sealable charging opening proximate the second end for inserting the first container into the first interior space;
• a second interior space before the first interior space and the charging opening, the second end of the first container being in fluid communication with the second interior space;
• an inlet port providing fluid communication into the second interior space from outside said second container;
• an injection port proximate the first end of the second container for providing fluid communication between the first container and a reaction chamber;
• and
• means for securing the second container to a reaction chamber so that the injection port will be in fluid communication with the reaction chamber.