Exclusive CHIPS-TPT algorithms for simulation of neutron-nuclear reactions

Kosov, M.V.; Savin, Dmitriy

doi:10.1142/s2010194516602246

Cited by 1 publication

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“…CHIPS-TPT [1,2] is the successor of CHIPS [3] physics package formerly included in Geant4 [4,5] package. Starting from the Geant-4.10 release, CHIPS is no longer supported by the Geant4 Collaboration.…”

Section: Introductionmentioning

confidence: 99%

Exclusive data-based modeling of neutron-nuclear reactions below 20 MeV

Савин¹,

Kosov²

2017

EPJ Web Conf.

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Abstract. We are developing CHIPS-TPT physics library for exclusive simulation of neutron-nuclear reactions below 20 MeV. Exclusive modeling reproduces each separate scattering and thus requires conservation of energy, momentum and quantum numbers in each reaction. Inclusive modeling reproduces only selected values while averaging over the others and imposes no such constraints. Therefore the exclusive modeling allows to simulate additional quantities like secondary particle correlations and gamma-lines broadening and avoid artificial fluctuations. CHIPS-TPT is based on the formerly included in Geant4 CHIPS library, which follows the exclusive approach, and extends it to incident neutrons with the energy below 20 MeV. The NeutronHP model for neutrons below 20 MeV included in Geant4 follows the inclusive approach like the well known MCNP code. Unfortunately, the available data in this energy region is mostly presented in ENDF-6 format and semi-inclusive. Imposing additional constraints on secondary particles complicates modeling but also allows to detect inconsistencies in the input data and to avoid errors that may remain unnoticed in inclusive modeling.

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