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HK: Hadronen und Kerne
HK 60: Instrumentation VI, Detector Systems
HK 60.6: Vortrag
Donnerstag, 19. März 1998, 15:45–16:00, A
Calculation of neutron response functions in complex geometries with the MCNP code⋆ — •C. Bähr1, R. Böttger2, H. Klein2, P. von Neumann–Cosel1, A. Richter1, D. Schmidt2, K. Schweda1, and S. Strauch1 — 1Institut für Kernphysik, Technische Universität Darmstadt, D–64289 Darmstadt, Germany — 2Physikalisch–Technische Bundesanstalt (PTB), D–38116 Braunschweig, Germany
Neutron response functions of an NE 213 liquid scintillation detector were calculated with the widely used NRESP code [1] and, for the first time, the MCNP code [2] taking into consideration nonlinear light output functions for secondary charged particles. Excellent agreement between NRESP and MCNP calculations was achieved if the same detector model, light output functions and neutron cross sections were used. With a modification of the MCNP code, the response functions may now also be calculated for complex detector arrangements, e.g. including massive shieldings. A recently developed setup for the study of (e,e′n) coincidence experiments is discussed as an example.
[1] G. Dietze and H. Klein, program codes NRESP7 and NEFF7, PTB Braunschweig report PTB–ND–22 (1982).
[2] J. F. Briesmeister, Ed., program MCNP, version 4A, Los Alamos report LA-12625-M (1993). ⋆ Supported by the DFG under contract Ri 242/12–1.