The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 9 4 2019 11 26 Calibration constant of a silver activation counter used with plasma focus devices Calibration constant of a silver activation counter used with plasma focus devices 305 312 835 FA GR Etaati 0000-0003-3544-4560 R Amrollahi V Doostmohammadi Journal Article 2019 11 26 The silver activation counters are commonly used for pulsed-neutron yield measurements especially in plasma focus devices. The counter normally consists of a Geiger-Muller tube along with silver foils and polyethylene (as a moderator), which is calibrated against an Am-Be radioisotope neutron source. The neutrons, after being slowed-down in the polyethylene, activate the silver foils. By measuring the foil activity with a Geiger-Muller counter, the neutron yield is determined. In the present paper, the activation counter’s calibration constant calculation using the MCNP4C code is explained. The calculated calibration constant is in good agreement with the experimental results. The silver activation counters are commonly used for pulsed-neutron yield measurements especially in plasma focus devices. The counter normally consists of a Geiger-Muller tube along with silver foils and polyethylene (as a moderator), which is calibrated against an Am-Be radioisotope neutron source. The neutrons, after being slowed-down in the polyethylene, activate the silver foils. By measuring the foil activity with a Geiger-Muller counter, the neutron yield is determined. In the present paper, the activation counter’s calibration constant calculation using the MCNP4C code is explained. The calculated calibration constant is in good agreement with the experimental results. https://ijpr.iut.ac.ir/article_835_4d5b995358e7798bc7e9d9db83c612a5.pdf