标题： CEM2k和LAQGSM代码在描述光核反应方面的扩展 显示英文标题

标题： Extension of the CEM2k and LAQGSM Codes to Describe Photo-Nuclear Reactions

摘要： 改进的级联-激子模型（CEM）代码 CEM2k+GEM2 和洛斯阿拉莫斯版本的夸克-胶子弦模型代码 LAQGSM 被扩展以描述光核反应。 首先，我们将基于最新实验数据的新评估基本截面纳入 CEM2k+GEM2，并对反应由任意入射粒子引发的级联阶段后剩余核的退激发描述进行若干改进。 接下来，对于光核反应，我们在 CEM2k+GEM2 中加入基于 Kossov 最新系统学的评估实验吸收截面归一化。 然后，我们通过添加被其所有先前版本忽略的光核模式来扩展我们的高能代码 LAQGSM，并将其从改进的 CEM2k+GEM2 中加入光核部分。 在这项工作中，我们介绍了作为代码一部分的光核模式的简要描述，展示了一些说明性结果，并指出了某些尚未解决的问题。 显示英文摘要

摘要： The improved Cascade-Exciton Model (CEM) code CEM2k+GEM2 and the Los Alamos version of the Quark-Gluon String Model code LAQGSM are extended to describe photonuclear reactions. First, we incorporate into CEM2k+GEM2 new evaluations of elementary cross sections based on the latest experimental data and also make several improvements in the description of the de-excitation of nuclei remaining after the cascade stage of reactions induced by arbitrary projectiles. Next, for photonuclear reactions we include in CEM2k+GEM2 a normalization to evaluated experimental absorption cross sections based on the recent systematics by Kossov. Then, we extend our high-energy code LAQGSM by adding the photonuclear mode which was ignored in all its previous versions, and add to it the photonuclear part from our improved CEM2k+GEM2. In this work we present a short description of the photonuclear mode as incorporated into our codes, show several illustrative results, and point out some unresolved problems.