flux perturbation

https://doi.org/10.1351/goldbook.08727
Change of energy flux density or energy distribution of particles or photons in an object as a result of effects such as flux depression and/or self-shielding.
Source:
PAC, 2021, 93, 69. (Vocabulary of radioanalytical methods (IUPAC Recommendations 2020)) on page 81 [Terms] [Paper]