本模型基于裂变多通道无规颈断裂模型,考虑宏观液滴能、壳效应能以及壳效应与温度的关系,得到参数化的势能表示形式.通过拟合不同测量方法得到的实验数据(经过评价)获得3组模型参数.3组参数计算的碎片质量分布均很好地再现了不同能点的实验数据,除了基于动能法实验数据得到的参数外,其14 MeV的计算结果与实验数据符合较差.研究发现,不同入射中子能量的裂变碎片质量分布有4个主要交叉点,在交叉点之上的产额随入射中子能量增加减少,之下的产额则随入射中子能量上升;内侧(或外侧)的两个交叉点质量数之和近似等于裂变复合核的质量数;不同裂变系统的重峰左侧的交叉点都保持在132附近.
参考文献
| [1] | BENLLIURE J,GREWE A,JONG M de,et al.Nucl Phys A,1998,628:458. |
| [2] | SHU Nengchuan,CHEN Yongjing,LIU Tingjin,et al.J KPS,2011,59:1353. |
| [3] | CHEN Xiaosong.Study on Mass Distribution and Yield Energy Dependence for n+239pu Fission with Phenomenological Method[D].Beijing:China Institute of Atomic Energy,2012.(in Chinese)(陈笑松.239pu(n,f)裂变碎片的质量分布产额能量关系的唯象模型研究[D].北京:中国原子能科学研究院,2012.) |
| [4] | EXFOR:Experimental Nuclear Reaction Data[EB/OL].[2011-09-21].http://www-nds.iaea.org/exfor/exfor.htm. |
| [5] | CINDA:Computer Index of Nuclear Reaction Data[EB/OL].[2011-09-21].htttp://www-nds.iaea.org/exfor/cinda.htm. |
| [6] | WEHRING B W,LEE S,SWIFT G.et al.Trans Ameri Nuc Soc,1980,35:551. |
| [7] | LISMAN F L,ABERNATHEY R M,MAECK W J.et al.Nuc Sci & Eng,1970,42:191. |
| [8] | BIDINOSTI D R,IRISH D E,TOMLINSON R H.Cana Chem,1961,39:628(13208). |
| [9] | MAECK W J.Conf on Nuclear Cross Sections and Technology,Washington,D.C.,1975,1:378(13327). |
| [10] | MAECK W J,ERIKSON A L,TROMP R L.R,ENICO-1028,1980. |
| [11] | KOCH L.Radiochimica Acta,1981,29:61(21155). |
| [12] | LAUREC J,ADAM A,DEBRUYNE T.R,CEA-R-5147,1981(in French). |
| [13] | BORDEN K D,KURODA P K.Inorg Nucl Chem,1969,31:2623. |
| [14] | NETHAWAY D R,MENDOZA B.Phys Rev C,1972,6:1827. |
| [15] | SERGACHEV A I,DJACHENKO N P,KOVALEV A M,et al.J YF,1972,16(3):475. |
| [16] | SURIN V M,SERGACHEV A I,REZCHIKOV N I,et al.J YF,1971,14(5):935. |
| [17] | CHEN Yongjing,LIU Tingjin,SUN Zhengjun,et al.Nuclear Physics Review,2012,29(2):208.(in chinese)(陈永静,刘廷进,孙正军,等.原子核物理评论,2012,29(2):208.) |
| [18] | BROSA U,GROSSMAN S,MOLLER A.Phys Rep,1990,197:167. |
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