Some synchrotron produced radioactivities of tantalum

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1950-12-01
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Moses, Alfred
Martin, Don
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Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

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X-ray irradiation of wolfram by a synchrotron beam have produced three radioactive isotopes of tantalum with half-lives of 48 m. (TA-185), 8.0 hr. (TA-180) and 6.0d (TA-183) Characteristics of the activities have been studied by absorption and coincidence measurements. Separated W-182 was used for the identification of the TA-180. Relative yields of the three isotopes were measured for beam energies of 30 Mev. and 68 Mev. In addition, the yields for 68 Mev. have been compared to the yield of the reaction C-12(y,n) C-11. TA-180 can not form by a (y, p) reaction; however its yield was comparable to the yield of isotopes formed by such a reaction.

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