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We report on the screening of samples of titanium metal for theirradio-purity. The screening process described in this work led to the selectionof materials used in the construction of the cryostats for the LargeUnderground Xenon (LUX) dark matter experiment. Our measurements establishtitanium as a highly desirable material for low background experimentssearching for rare events. The sample with the lowest total long-lived activitywas measured to contain <0.25 mBq/kg of U-238, <0.2 mBq/kg of Th-232, and <1.2mBq/kg of K-40. Measurements of several samples also indicated the presence ofshort-lived (84 day half life) Sc-46, likely produced cosmogenically via muoninitiated (n,p) reactions.

Radio-assay of Titanium samples for the LUX Experiment