Evaluation of the sensitivity of the gas-discharge gamma-counters to the concomitant neutron radiation

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Pikalov, G.L.^1 ; Kiseev, S.V.^1

12 Central Scientific Research Institute, Ministry of Defense of the Russian Federation, Moscow Region, Sergiev Posad

141307, Russia^1

关键词: Accuracy measurements;    Gamma dosimeter;    Gamma dosimetry;    Gamma-neutron fields;    Neutron radiations;    Radiation field;    Sensitivity coefficient;    Verification results;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012018/pdf
DOI  :  10.1088/1742-6596/653/1/012018

来源: IOP

【 摘 要 】

In the fields of gamma-neutron radiation the accuracy measurement of gamma- ray doses depends on their sensitivity to concomitant neutron radiation. In this connection, verification results of gamma-dosimetry on the installation with isotope cobalt or cesium sources are not always adequate to measurement results in real gamma-neutron fields. The data prove, that the sensitivity coefficients of gas-discharge gamma-dosimeters at PRIZ-M reactor is 1.23 larger as compared to Co60source, due to the effect of the concomitant neutrons on their indications. The error due to the neutrons effect can be significantly reduced or eliminated completely, if gamma-dosimeters calibrated in the field of gamma-neutron radiation, adequate spectral and dose characteristics to radiation fields in which they are used.