Abstract
A mass spectrometer has been built for on-line analysis of fission product nuclides. The spectrometer ion source is located inside the thermal column of a TRIGA reactor and consists of a high-temperature oven containing fissile target material. Fission product nuclides born in the target are thermally ionized and accelerated out of the reactor through a 2.3 m long flight tube. Outside the reactor the ion beam is deflected 90° by an electrostatic mirror. Mass analysis of the ions takes place in a 30.5 cm radius, 60° deflection magnetic field. The system is intended initially to measure relative independent and cumulative yields of Rb, Cs, Br, and I isotopes with half-lives as short as 0.1 s. Other applications include nuclear spectroscopy, delayed-neutron emission measurements, and measurements of nuclidic masses and nuclear moments of the separated isotopes produced by the system.
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