TY - RPRT TI - Absorbed dose to water calibration of ionization chambers in a ⁶⁰Co gamma-ray beam AU - Minniti, Ronaldo AU - Shobe, Jileen AU - Seltzer, Stephen M AU - Chen-Mayer, Heather AU - Domen, Steve R PY - 2006 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 250-74 DO - 10.6028/NIST.SP.250-74 ER -