Article

Journal of Radioanalytical and Nuclear Chemistry

, Volume 283, Issue 1, pp 63-68

Combinatorial study of thin film metal hydride by prompt gamma activation analysis

  • L. R. CaoAffiliated withAnalytical Chemistry Division, National Institute of Standards and TechnologyDepartment of Materials Science and Engineering, University of Maryland at College Park Email author 
  • , J. R. Hattrick-SimpersAffiliated withMetallurgy Division, National Institute of Standards and Technology
  • , R. BindelAffiliated withAnalytical Chemistry Division, National Institute of Standards and Technology
  • , B. E. TomlinAffiliated withAnalytical Chemistry Division, National Institute of Standards and Technology
  • , R. ZeislerAffiliated withAnalytical Chemistry Division, National Institute of Standards and Technology
  • , R. PaulAffiliated withAnalytical Chemistry Division, National Institute of Standards and Technology
  • , L. A. BenderskyAffiliated withMetallurgy Division, National Institute of Standards and Technology
  • , R. G. DowningAffiliated withAnalytical Chemistry Division, National Institute of Standards and Technology

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Abstract

Cold neutron prompt gamma activation analysis (PGAA) was used to determine the mass of hydrogen in Mg hydride thin films with varying hydrogenation times. The results suggest that hydrogenation of the Mg thin films remains unsaturated even after 48 h of treatment, contrary to the indications of inferential hydrogen measurement methods. To demonstrate PGAA as an effective combinatorial methodology for hydride thin films, a continuously varying composition gradient of thin MgyTi(1−y) hydride film with y ranging from 0.65 to 0.94 was prepared and analyzed by both PGAA and instrumental neutron activation analysis (INAA). The variation in the molar ratio of Mg, Ti, and H was obtained for nine 5 mm wide segments of the film.

Keywords

Thin film Combinatorial Metal hydride Hydrogen storage IR emissivity Cold neutron NAA Prompt gamma activation analysis Instrumental neutron activation analysis