Palladium-103 and io-125 compound sealed seed source, source core and source core preparation method

The invention belongs to the technical field of medical preparations containing radioactive substances, in particular to a palladium-103 and io-125 compound sealed seed source, a source core and a source core preparation method. A palladium-103 and io-125 compound film covers on a carrier to form the source core, and the palladium-103 and io-125 compound sealed seed source is prepared in a way that the source core is welded and sealed in a titanium pipe or titanium alloy pipe. The source core preparation method of the palladium-103 and io-125 compound sealed seed source comprises the steps of: 1, inoculating a nano palladium seed crystal: dipping a carrier bar into a chloroform solution of palladium diacetate, and then dipping into an alkaline ammonia solution of hydrazine; 2, carrying out chemical plating on palladium-103 and silver: putting the carrier bar into a mixed solution of palladium chloride, silver nitrate, ethylene diamine tetraacetic acid, ammonium hydroxide and hydrazineto enable the surface of