Isotopic Yield Distributions of Transfer- and Fusion-Induced Fission from 238U+12C Reactions in Inverse Kinematics
Isotopic Yield Distributions of Transfer- and Fusion-Induced Fission from 238U+12C Reactions in Inverse Kinematics
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逆运动学中 238U 12C 反应的转移和聚变诱发裂变的同位素产率分布
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
C. Schmitt
中科院分区：
文献类型：
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作者：
M. Caamano;O. Delaune;F. Farget;X. Derkx;K. Schmidt;L. Audouin;C. Bacri;G. Barreau;J. Benlliure;E. Casarejos;A. Chbihi;B. Fernández;L. Gaudefroy;C. Golabek;B. Jurado;A. Lemasson;A. Navin;M. Rejmund;T. Roger;A. Shrivastava;C. Schmitt
本文提出了一种新的方法来获得锕系元素低能裂变产生的碎片的原子序数Z和质量A的完全鉴定。该方法基于逆运动学中的多核子转移和聚变反应，应用于238 U束与12 C靶之间产生和诱发中等激发锕系元素裂变的反应。GANIL的VAMOS光谱仪检测并完全识别裂变碎片，允许测量范围在A ~ 80和~ 160之间以及Z ~ 30到~ 64之间的数百种同位素的碎片产额。第一次，完整的同位素产额分布的碎片从定义明确的裂变系统。连同碎片发射角度和速度的精确测量，这项技术提供了对核裂变过程的进一步了解。
A novel method to access the complete identification in atomic number Z and mass A of fragments produced in low-energy fission of actinides is presented. This method, based on the use of multi- nucleon transfer and fusion reactions in inverse kinematics, is applied in this work to reactions between a 238U beam and a 12C target to produce and induce fission of moderately excited actinides. The fission fragments are detected and fully identified with the VAMOS spectrometer of GANIL, allowing the measurement of fragment yields of several hundreds of isotopes in a range between A ~ 80 and ~ 160, and from Z ~ 30 to ~ 64. For the first time, complete isotopic yield distributions of fragments from well-defined fissioning systems are available. Together with the precise measurement of the fragment emission angles and velocities, this technique gives further insight into the nuclear-fission process.