Issues

• Linear-in-S beta interpolation overestimates low-energy inelastic xs for sharp quasi-elastic peaks (up to +44% vs NJOY)

  mctools/ncrystal#386 · Filter by author marquezj-tests opened on Oct 1, 2026

• More materials for McStas usage

  mctools/ncrystal#385 · Filter by author tkittel opened on Sep 30, 2026

• C++ ABI breaking changes.

  mctools/ncrystal#384 · Filter by author tkittel opened on Sep 30, 2026

• getLatticeRot stores an extra term in m[5], giving a wrong reciprocal lattice and cell volume for general cells

  mctools/ncrystal#383 · Filter by author ramic-k opened on Sep 25, 2026
  5

• VDOS with leading zeroes not working

  algorithmsbug
  mctools/ncrystal#382 · Filter by author tkittel opened on Sep 24, 2026

• Request for new material : Cadmium

  data library
  mctools/ncrystal#373 · Filter by author jorobledo opened on Jul 6, 2026
  8

• Add cached access in virtual apis

  enhancementopenmc
  mctools/ncrystal#371 · Filter by author tkittel opened on Jun 30, 2026
  1

• Add public interface for controlling print

  enhancementpython
  mctools/ncrystal#361 · Filter by author jl-wynen opened on Jun 2, 2026
  5

• Need VirtualAPI tailored for FLUKA

  deploymentenhancementFLUKA
  mctools/ncrystal#357 · Filter by author tkittel opened on May 9, 2026

• Migrate conda-forge pkg to v1 recipe.yaml scheme

  deployment
  mctools/ncrystal#353 · Filter by author tkittel opened on May 4, 2026

• Example notebooks using EXFOR fails due to fprbidden access

  bugdocumentationtests
  mctools/ncrystal#351 · Filter by author tkittel opened on May 4, 2026
  7

  

• Jumps in T-dependence of inelastic cross section

  algorithmsenhancement
  mctools/ncrystal#349 · Filter by author marquezj opened on Apr 23, 2026
  15

• KeyboardInterrupt does not work to end long MiniMC

  bugminimc
  mctools/ncrystal#340 · Filter by author tkittel opened on Mar 30, 2026

• Better exception handling in factory threads

  matcfg
  mctools/ncrystal#339 · Filter by author tkittel opened on Mar 30, 2026

• Create NCrystalFilter component for McStas

  mcstas
  mctools/ncrystal#338 · Filter by author tkittel opened on Mar 30, 2026
  1

• Improve NCrystal-McStas integration

  matcfgmcstasminimc
  mctools/ncrystal#336 · Filter by author tkittel opened on Mar 17, 2026
  3

• Try example notebooks with mccode-antlr

  documentationenhancementmcstaspython
  mctools/ncrystal#334 · Filter by author tkittel opened on Mar 11, 2026
  1

• Reduce memory usage when SC materials differ only in orientation

  algorithmsenhancement
  mctools/ncrystal#333 · Filter by author tkittel opened on Mar 10, 2026
  2

• Eventually remove pandas pinnings in CI

  dependenciestests
  mctools/ncrystal#327 · Filter by author tkittel opened on Jan 23, 2026

• Visual representation of Info objects

  data libraryenhancementpython
  Feature

  mctools/ncrystal#326 · Filter by author marquezj opened on Jan 21, 2026
  1

  

• Run CI on windows arm

  enhancementgithub_actionstestsWindows
  mctools/ncrystal#321 · Filter by author tkittel opened on Jan 5, 2026

• JSON reading support by C++ layer

  mctools/ncrystal#319 · Filter by author tkittel opened on Dec 15, 2025

• MiniMC should ensure baskets always contains a multiple of 64 neutrons

  minimc
  mctools/ncrystal#314 · Filter by author tkittel opened on Dec 4, 2025

• Verify temperature handling for special multiphase materials in OpenMC and Geant4

  bug
  mctools/ncrystal#312 · Filter by author tkittel opened on Nov 27, 2025

• Adding effective temperatures to NCRYSTAL

  enhancement
  mctools/ncrystal#310 · Filter by author krzystyniak opened on Nov 25, 2025
  1