基于GEM工艺的裂变时间投影室中裂变碎片的讨论
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摘要
基于GEM工艺的裂变时间投影室兼具GEM工艺的高计数率、高空间分辨本领等优点,我们拟通过裂变时间投影室在单次测量中准确获取裂变产物的核电荷数、质量数以及能量等多种信息。本文主要讨论了基于GEM工艺的裂变时间投影室中工作气体的种类、气压以及裂变碎片在气室中的能量损失和有效电荷问题,发现对于轻重两种裂变碎片的能量损失而言,重裂变碎片的分布宽度更窄。并针对裂变碎片在气室中的能量损失,提出了一种通过裂变碎片的有效电荷获取核电荷数的方法。这对于裂变时间投影室的研制工作以及实现裂变产物的多参量测量具有重要意义。
The fission time projection chamber based on GEM technology has the advantages of GEM technology such as high counting rate and high spatial resolution. Therefore, we plan to obtain nuclear charge number,mass number and energy of fission products in a single measurement through fission time projection chamber. This paper mainly discusses the types of working gas, pressure, energy loss and effective charge of fission fragments in the fission time projection chamber based on GEM process. It is found that for the energy loss of light and heavy fission fragments, the distribution width of heavy fission fragments is narrower than that of the light fission fragments. Based on the energy loss of fission fragments in gas chamber, a method to obtain nuclear charge from the effective charge of fission fragments is proposed, which is very important for the development of fission time projection chamber and the multi-parameter measurement of fission products.
The fission time projection chamber based on GEM technology has the advantages of GEM technology such as high counting rate and high spatial resolution. Therefore, we plan to obtain nuclear charge number,mass number and energy of fission products in a single measurement through fission time projection chamber. This paper mainly discusses the types of working gas, pressure, energy loss and effective charge of fission fragments in the fission time projection chamber based on GEM process. It is found that for the energy loss of light and heavy fission fragments, the distribution width of heavy fission fragments is narrower than that of the light fission fragments. Based on the energy loss of fission fragments in gas chamber, a method to obtain nuclear charge from the effective charge of fission fragments is proposed, which is very important for the development of fission time projection chamber and the multi-parameter measurement of fission products.
引文
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