Ananké, un nouveau programme pour le calcul rapide des corrections à apporter aux distributions angulaires de neutrons diffusés élastiquement

Abstract

This paper describes a new program, ANANKÉ, to be used to correct experimental neutron elastic angular distributions. This program performs a classical Monte Carlo simulation but the treatment of the generated information is quite different from the previous ones: we have defined a new type of “density detections” the use of which allows a considerable gain of computation time. The statistical uncertainty introduced by simulation is evaluated taking into account the correlation between the different simulated variables. This uncertainty appears to be very small. The program has been used to correct angular distributions of 6.4 MeV neutrons scattered by ²⁰⁹Bi, ¹²⁷I, ⁷⁵As, ⁵⁹Co, ³¹P and ¹²C, and proved to be very fast.