title: The Nice high-energy neutron facility: dosimetry intercomparisons.
abstract: Neutron dosimetry intercomparison studies have been undertaken at the Nice neutrontherapy facility with the staff at Louvain-la-Neuve which has had wide experience in both dosimetric and radiobiological intercomparisons. Tissue equivalent (TE) ionization chambers were first calibrated in 60Co beams and then exposed in the neutron beam at different depths in a water phantom; the largest difference observed in neutron beam measurements with all the chambers tested was 0.89%, and most of them agreed to within less than 0.5%. The gamma component at four depths was derived from measurements with Geiger-Müller counters; the results obtained with the two counters (Nice and Louvain-la-Neuve), expressed as a percentage of the total dose (neutron + gamma), agreed to within less than 0.03% and the value increased from 1.4 to 4.2% between 2 and 20 cm in depth.
authors.affiliation: Cyclotron Biomédical, Centre Antoine Lacassagne, Nice, France.
authors.forename: N
authors.initials: N
authors.lastname: Iborra-Brassart
authors.forename: S
authors.initials: S
authors.lastname: Vynckier
authors.forename: J
authors.initials: J
authors.lastname: Herault
authors.forename: P
authors.initials: P
authors.lastname: Chauvel
mesh_terms: D002138:Calibration; D003037:Cobalt Radioisotopes; D017357:Cyclotrons; D004867:Equipment Design; D005214:Fast Neutrons; D005602:France; D005720:Gamma Rays / Q000627:therapeutic use; D006801:Humans; D018499:Linear Energy Transfer; D009369:Neoplasms / Q000532:radiotherapy*; D011879:Radiotherapy Dosage; D011881:Radiotherapy, Computer-Assisted; D011882:Radiotherapy, High-Energy / Q000295:instrumentation / Q000379:methods
chemical_list: D003037:Cobalt Radioisotopes