Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Comparison of the NIST and ENEA Air Kerma Standards



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


A comparison was made between the NIST and ENEA air kerma standards for medium energy x-rays and 60Co 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 BIPM (generating voltages of 100, 135, 180 and 250 kV respectively) and with 60Co gamma radiation. The agreement in this comparison was within 0.03% for 60Co gamma radiation and in the range between 0.1% to 0.8% for the medium energy x-ray qualities.
Journal of Research (NIST JRES) -
103 No. 4


air kerma, Co-60, comparison of standards, gamma-ray standards, transfer chambers, x-ray standards


Laitano, R. , Lamperti, P. and Toni, M. (1998), Comparison of the NIST and ENEA Air Kerma Standards, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD (Accessed April 17, 2024)
Created July 1, 1998, Updated February 17, 2017