排序方式: 共有47条查询结果,搜索用时 15 毫秒
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利用Schottky质谱仪进行远离β稳定线核质量测量研究是九五国家大科学工程兰州重离子加速器冷却储存环上的一个重要研究方向. 简要分析了Schottky探针的工作原理和利用 Schottky质谱仪进行质量测量, 给出了对用于HIRFL CSR束流诊断与测量的Schottky探针的研制与测试结果. he mass measurement of the nuclides far from the β stability by using Schottky mass spectrometry is an important aspect of the studies on HIRFL CSR. The principle of Schottky pick up and the method and prospect of Schottky mass spectrometry are also briefly analyzed. The Schottky pick up designed for the system of diagnostics and measurement of HIRFL CSR and also the test results are given. 相似文献
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描述了50.4MeV/u的12N和42.3MeV/u的13N次级放射性束在28Si靶上引起的核反应总截面σr实验研究,结果发现12N的反应总截面σr比其相邻同位素核13N有着异常的增大.这可能是核形变及核子对效应造成的,试验中的测量误差也不可忽视.利用微观Glauber模型计算了12N在28Si靶上的核反应总截面,并与实验结果做了比较,发现理论计算与实验结果拟合较好
关键词:
质子晕
反应截面 相似文献
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Properties for the ground state of 9 C are studied in the relativistic continuum Hartree-Bogoliubov theory with the NLSH, NLLN and TM2 effective interactions. Pairing correlations are taken into account by a density-dependent δ-force with the pairing strength for protons determined by fitting either to the experimental binding energy or to the odd-even mass difference from the five-point formula. The effects of pairing correlations on the formation of proton halo in the ground state of 9C are examined. The halo structure is shown to be formed by the partially occupied valence proton levels p3/2 and p1/2. 相似文献
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丰中子核6He在28Si靶上的反应总截面测量 总被引:1,自引:0,他引:1
实验测量了20—40MeV u的轻丰中子核6He在Si靶上的反应总截面,并且结合6He的高能实验数据,采用双参数HO密度分布形式用Glauber模型计算得到较好的拟合.与Warner的实验数据比较,反应总截面数据系统性好,并与能量有明显的依赖关系. Total reaction cross section (σt) was measured for neuton rich nuclei 6He on 28Si target from about 20 to 40 MeV/u and compared with Warner s experimental data. It is found that the total cross section of 6He on 28Si depends on the energy and it can be fitted well by Glauber model using two term HO density distribution from high energy data of 6He. 相似文献
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描述了利用Glauber模型计算反应截面的一种方法 .该方法对Glauber模型中输入的密度分布形式进行了修正 ,计算了丰质子同中子核素 (N =3 )的激发函数 .对于该同中子素链 ,采用修正的密度分布得到的激发函数与HO分布得到的激发函数相比 ,在大于 1 0 0MeV/u的能量区域 ,两者都与实验值符合得很好 ,而在中能区 (小于 1 0 0MeV/u) ,用修正的密度分布计算得到的激发函数与实验值之间的差距较HO分布明显减小 ,并保持对所有计算的核核芯密度基本相同 . 相似文献
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The mirror nuclei 12N and 12B are separated by the Radioactive Ion Beam Line in Lanzhou(RIBLL) at HIRFL from the breakup of 78.6 MeV/u 14N on a Be target.The total reaction cross-sections of 12N at 34.9 MeV/u and 12B at 54.4 MeV/u on a Si target have been measured by using the transmission method.Assuming 12N consists of a 11C core plus one halo proton,the excitation function of 12N and 12B on a Si target and a C target were calculated with the Glauber model.It can fit the experimental data very well.The ch... 相似文献
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The properties of neutron-rich boron isotopes are studied in the relativistic continuum Hartree-Bogoliubov theory in coordinate space with NL-SH, PK1 and TM2 effective interactions. Pairing corrections are taken into account by a density dependent force of zero range. The binding energies calculated for these nuclei agree with the experimental data quite well. The neutron-rich nucleus 17B has been predicted to have a two-neutron halo structure in its ground state. The halo structure of 17B is reproduced in a self-consistent way, and this halo is shown to be formed by the valence neutron level 2s1/2. 相似文献