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首页> 外文会议>NEA No.3828; Task Force on Shielding Aspects of Accelerators, Targets and Irradiation Facilities; 20020410-12; Menlo Park,CA(US) >MERGING THE CEM2k AND LAQGSM CODES WITH GEM2 TO DESCRIBE FISSION AND LIGHT-FRAGMENT PRODUCTION
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MERGING THE CEM2k AND LAQGSM CODES WITH GEM2 TO DESCRIBE FISSION AND LIGHT-FRAGMENT PRODUCTION

机译：将CEM2k和LAQGSM编码与GEM2合并以描述裂变和轻碎片生产

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摘要

We present the current status of the improved Cascade-exciton Model (CEM) code CEM2k and of the Los Alamos version of the Quark-gluon String Model code LAQGSM. To describe fission and light-fragment (heavier than ~4He) production, both CEM2k and LAQGSM have been merged with the GEM2 code of Furihata. We present some results on proton- and deuteron-induced spallation, fission and fragmentation reactions predicted by these extended versions of CEM2k and LAQGSM. We show that merging CEM2k and LAQGSM with GEM2 allows us to describe many fission and fragmentation reactions in addition to the spallation reactions, which are already relatively well described. Nevertheless, the standard version of GEM2 does not provide a completely satisfactory description of complex particle spectra, heavy-fragment emission and spallation yields, and is not yet a reliable tool for applications. We conclude that we may choose to use a model similar to the GEM2 approach in our codes, but it must be significantly extended and further improved. We observe that it is not sufficient to analyse only A and Z distributions of the product yields when evaluating this type of model, as is often done in the literature; instead it is important to study all the separate isotopic yields as well as the spectra of light particles and fragments.
机译：我们介绍了改进的Cascade-exciton模型（CEM）代码CEM2k和Quark-gluon弦模型代码LAQGSM的Los Alamos版本的当前状态。为了描述裂变和光碎片（大于4He），CEM2k和LAQGSM已与Furihata的GEM2代码合并。我们提出了这些扩展版本的CEM2k和LAQGSM预测的质子和氘核诱导的散裂，裂变和碎片反应的一些结果。我们表明，将CEM2k和LAQGSM与GEM2合并可以使我们描述除裂变反应外的许多裂变和裂化反应，这些反应已经得到了很好的描述。然而，GEM2的标准版本并未提供对复杂粒子光谱，重碎片发射和散裂产率的完全令人满意的描述，并且仍不是用于应用程序的可靠工具。我们得出的结论是，我们可以选择在代码中使用类似于GEM2方法的模型，但是必须对其进行显着扩展和进一步改进。我们注意到，评估这种类型的模型时，仅分析产品产量的A和Z分布是不够的，就像文献中经常提到的那样。相反，重要的是研究所有单独的同位素产率以及轻粒子和碎片的光谱。

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