Comparison of the NIST and ENEA Air Kerma Standards

R.F. Laitano, P.J. Lamperti, M.P. Toni

Research output: Contribution to journalArticle

4 Citations (Scopus)


A comparison was made between the National Institute of Standards and Technology (NIST) and Ente per le Nuove Tecnologie l'Energia e l'Ambiente (ENEA) air kerma standards for medium energy x rays and60Co gamma rays. The comparison took place at ENEA in June 1994. Two different transfer chambers from NIST were used for the comparison. The measurements were made at radiation qualities similar to those used at the Bureau International des Poids et Mesures (BIPM) (generating voltages of 100 kV, 135 kV, 180 kV and 250 kV, respectively) and with60Co gamma radiation. The transfer chamber calibration factors obtained at the NIST and at the ENEA agreed with one another to 0.03 % for60Co gamma radiation and between 0.1 % to 0.8 % for the medium energy x-ray beam codes.
Original languageEnglish
Pages (from-to)365 - 378
Number of pages14
JournalJournal of Research of the National Institute of Standards and Technology
Issue number4
Publication statusPublished - 1998
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this