The FISPACT-II User Manual (2023)
Fispact-II is an inventory code capable of performing modelling of activation, transmutations and depletion induced by neutron, proton, alpha, deuteron or gamma particles incident on matter. It is a 21st century code that has been substantially extended to provide many advanced and unique capabilities. Fispact-II is written in object-style fortran and has full dynamic memory allocation. It has improved algorithms for the ODE solver, pathways, uncertainty and sensitivity calculations. All these can be used in multi-pulse irradiation calculations, including those where the flux spectrum changes from pulse to pulse. It reads the modern, ENDF-format data libraries, as well as certain legacy libraries such as EAF, and the present version uses the latest TALYS-based TENDL evaluated nuclear data libraries, the latest GEFY fission yields and high-energy residual product data from the latest intra-nuclear cascade and de-excitation INCL++/ABLA codes. Together with probability table data from CALENDF for including self-shielding in the calculations. These libraries allow additional projectiles and nuclides to be included, and make possible additional kerma, emitted spectra, dpa and appm diagnostics. This document is the User Manual for Version 5.0.0. It provides installation and containerisation instructions, a ‘getting started’ tutorial suite, a comprehensive description of all inputs and outputs (including a new JSON output format), a description of the suite of test cases used in the continuous-integration regression tests, information on supported systems and details of utility programs. Several appendices are provided; the first describes the physical and mathematical models implemented in the code. The second provides details of some example particle spectra suitable for various applications that can be used to simulate the response of materials. A section on nuclear data libraries provides details of those libraries distributed with the code, including the latest versions of several international libraries: TENDL-2017, GEFY-6.1, HEIR-0.1, ENDF/B-VIII.0, JEFF-3.3, JENDL-4.0 and CENDL-3.1.