Patent Number: 
Section: claims

1. A process for production of radiostrontium comprising the steps of:bombarding a hermetically sealed target containing metallic rubidium inside a target shell, with a beam of accelerated protons;melting of the rubidium inside the target shell after the bombarding thereof to yield a rubidium-containing liquid composition;extracting radiostrontium from the rubidium-containing liquid composition via sorption at the temperature in the range of 275-350° C. on a sorbing surface of the target shell in contact with the rubidium-containing liquid composition;removing the rubidium-containing liquid composition from the target shell; andwashing radiostrontium with a solvent from the sorbing surface;wherein the rubidium-containing liquid composition contains oxygen in an amount of 0.1 to 4 wt %. 2. The process according to claim 1, wherein the material of the rubidium target shell is stainless steel, tantalum, niobium, tungsten, molybdenum, nickel, or a noble metal or a mixture thereof. 3. The process according to claim 1, wherein the radiostrontium is washed from the inner target shell surface with organic alcohols, water, or hydrochloric acid or a mixture thereof. 4. A process for production of radiostrontium comprising the steps of:bombarding a target made of metallic rubidium with a beam of accelerated protons;melting of the rubidium to yield a rubidium-containing liquid composition;extracting radiostrontium from the rubidium-containing liquid composition by circulating the rubidium-containing liquid composition during bombarding through a closed loop equipped with a trap wherein the loop is maintained at a temperature in the range from 10 to 200° C., wherein radiostrontium is extracted from the rubidium-containing liquid composition via sorption on the sorbing surface on parts of the trap heated to a temperature in the range of 220-350° C. which is in contact with the rubidium-containing liquid composition; andwashing radiostrontium with a solvent from the surface of the parts of the trapwherein the rubidium-containing liquid composition contains oxygen in an amount of no more than 3.0 wt %. 5. The process according to claim 4 wherein the material of parts of the trap is stainless steel, tantalum, niobium, titanium, zirconium, tungsten, molybdenum, nickel, or a noble metal or a mixture thereof. 6. The process according to claim 4 wherein radiostrontium is washed from the surface of parts of the trap with organic alcohols, water, or hydrochloric acid or a mixture thereof. 7. A process for producing radiostrontium comprising the steps of:bombarding a target made of metallic rubidium with a beam of accelerated protons;melting of the rubidium to yield a rubidium-containing liquid composition;extracting radiostrontium from the rubidium-containing liquid composition by circulating the rubidium-containing liquid composition during bombarding through a closed loop equipped with a trap wherein the loop is maintained at a temperature in the range from 10 to 38° C., and filtering the rubidium-containing liquid composition through a filtering unit made of a porous material comprising stainless steel, tantalum, niobium, titanium, zirconium, tungsten, molybdenum, nickel, or noble metals, wherein radiostrontium is extracted from the rubidium-containing liquid composition via sorption on a sorbing surface on parts of the filtering unit in contact with the rubidium-containing liquid composition;washing radiostrontium with a solvent from the surface of the parts of the filtering unit,wherein the rubidium-containing liquid composition contains oxygen in an amount of 0.1 to 4.0 wt %. 8. The process according to claim 7 wherein radiostrontium is washed from the surface of the filtering unit with organic alcohols, water, or hydrochloric acid or a mixture thereof. 9. The process according to claim 7, wherein the target is hermetically sealed.