Version 2 of the Intranuclear Cascade with Emission of Light Fragments (INC-ELF) code is developed and incorporated into the Particle and Heavy Ion Transport code System (PHITS). The aim of INC-ELF2 is to expand it to the lower incident-energy range of 30–200 MeV, where the original INC theory is not applicable. The refinement of the code is based faithfully on the results of basic research on direct reactions within the framework of the INC model. INC-ELF2 can deal with the emission of light fragments from nuclear reactions induced by protons and neutrons. Double-differential cross-sections are calculated by a two-step model combining INC-ELF2 and GEM (generalized evaporation model) in PHITS, and they are compared with experimental data to examine the predictive ability. Excellent agreement is confirmed for various reactions over a wide range of target masses and over the incident-energy range of 30–200 MeV.

开发了带有轻碎片发射的无核级联代码（INC-ELF）的版本2，并将其合并到粒子和重离子迁移代码系统（PHITS）中。INC-ELF2的目的是将其扩展到30-200 MeV的较低入射能量范围，而原始INC理论不适用。代码的完善完全基于INC模型框架内直接反应的基础研究结果。INC-ELF2可以处理质子和中子引起的核反应发出的光碎片。在PHITS中，通过将INC-ELF2和GEM（广义蒸发模型）结合的两步模型来计算双微分横截面，并将其与实验数据进行比较以检验预测能力。