Neutron-capture cross-sections of 244Cm and 246Cm measured with an array of large germanium detectors in the ANNRI at J-PARC/MLF
Neutron-capture cross-sections of 244Cm and 246Cm measured with an array of large germanium detectors in the ANNRI at J-PARC/MLF
复制标题
DOI：
10.1080/00223131.2012.693887
复制
发表时间：
2012-07-01
影响因子：
1.2
通讯作者：
Toh, Yosuke
中科院分区：
文献类型：
--
作者：
Kimura, Atsushi;Fujii, Toshiyuki;Toh, Yosuke
在日本质子加速器研究综合体j - parc /MLF材料与生命科学实验设施（MLF）的annri精密中子-核反应测量仪上，利用大型锗探测器阵列，用飞行时间法测量了Cm-244和Cm-246在1 ~ 300 ~ 300 eV能量范围内的中子俘获截面。在俘获反应中首次观察到Cm-244在7.7和16.8.8 eV左右的共振，Cm-246在4.3和15.3.3 eV左右的共振。所得截面的不确定度在Cm-244和Cm-246的第一次共振顶端分别为5.8%和6.6%。使用代码SAMMY对低能进行rResonance分析。得到了Cm-244和Cm-246的提示g射线谱。在Cm-244（n, γ）和Cm-246（n, γ）反应中分别观察到8个和5个新的提示g射线发射。
The neutron neutron-capture cross cross-sections of Cm-244 and Cm-246 were measured by the time-of-flight method in the energy range of 1-300 300 eV with an array of large germanium detectors in the Accurate Neutron-Nucleus Reaction measurement InstrumentANNRI at Material and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research ComplexJ-PARC/MLF. The Cm-244 resonances at around 7.7 and 16.8 8 eV and the Cm-246 resonances at around 4.3 and 15.3 3 eV were observed in the capture reactions for the first time. The uncertainties of the obtained cross cross-sections are 5.8% at the top of the first resonance of Cm-244 and 6.6% at that of Cm-246. The rResonance analyses were performed for low-energy ones using the code SAMMY. The prompt g-ray spectra of Cm-244 and Cm-246 were also obtained. Eight and five new prompt g-ray emissions were observed in the Cm-244(n, gamma) and Cm-246(n, gamma) reactions, respectively.