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Abstract

An experimental method is presented for the determination of the total efficiency and the response function of a gamma-ray detector in the range 0.5--10 MeV. It consists of observing (p,gamma) resonance reactions with two detectors: the one to be calibrated, in this case a cylindrical deuterated hexabenzene liquid scintillator, and a Ge detector used to select and resolve the main two-step cascades of the reaction. Efficiencies and response functions were obtained for thirteen gamma-rays via the coincidence method, using targets of "26"Mg at proton energies of 1001 and 2220 keV, of "30"Si at 1398 keV and of "34"S at 1211 keV. The weighting function derived from these data was used to determine the capture area of the 1.15 keV neutron resonance in "56"Fe. By normalizing the data to the 5.2 eV resonance in "109"Ag, a value ("it g/"alphamma-"n"Gamma-gamma/Gamma)=7.1 pm 2.1 meV was obtained, in excellent agreement with the result of recent transmission measurements.

Additional information

Authors: CORVI F, JRC-GEEL;UNIVERSITY OF GRONINGEN, NL;PREVIGNANO A, JRC-GEEL;UNIVERSITY OF GRONINGEN, NL;LISKIEN H, JRC-GEEL;UNIVERSITY OF GRONINGEN, NL;SMITH P B JRC-GEEL, JRC-GEEL;UNIVERSITY OF GRONINGEN, NL;UNIVERSITY OF GRONINGEN, NL, JRC-GEEL;UNIVERSITY OF GRONINGEN, NL
Bibliographic Reference: NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH, VOL. 265, PP 475-484, 1988
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