共查询到17条相似文献,搜索用时 203 毫秒
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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要比,在大于100MeV/u的能量区域,两者都与实验值符合很好,而在中能区(小于100MeV/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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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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胡正国 王猛 徐瑚珊 孙志宇 王建松 肖国青 詹文龙 肖志刚 毛瑞士 张宏斌 赵铁成 徐治国 王玥 陈若富 黄天衡 高辉 贾飞 付芬 高启 韩建龙 章学恒 郑川 余玉洪 樊瑞睿 李波 郭忠言 《物理学报》2008,57(5):2866-2870
在兰州重离子加速器国家实验室(HIRFL)放射性次级束流线(RIBLL)上,用束流透射法测量了丰中子奇异核17B与C靶反应的总截面.假定17B具有15B(核芯)+2n结构,采用Gauss+HO形式的密度分布和零力程Glauber模型进行计算的结果可以很好地拟合实验数据,并得出17B的密度分布有一个很大的弥散,表明17B是双中子晕核.
关键词:
丰中子奇异核
反应总截面
Glauber模型
密度分布 相似文献
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在日本理化学研究所的放射性束流线上用透射法测量了能量为79 MeV/u的17C在12C反应靶上的反应截面;利用有限力程Glauber模型对17C的密度分布进行了分析. 同时拟合本实验结果及高能区的实验数据发现, 17C的中子密度分布中存在一个尾巴. 基于芯核加单粒子密度分布的假设,认为17C的价中子主要处于1d5/2轨道. We have measured the reaction cross section of 17C on a 12C target at 79 MeV/u using the transmission method. Together with previous data at high energy, we deduced the density distribution of 17C by fitting the experimental data using the finite range Glauber model. The analysis shows that a simple harmonic oscillator (HO) density is not adequate to explain consistently the present experimental data and the one at high energy simultaneously. To get a better fit of both the data, the existence of a tail in the density distribution of 17C is proposed. Based on the assumption of a core plus a single neutron, it is found that the valence neutron of 17C is mostly in the d orbital. This is in agreement with the conclusion from the measured momentum distribution. 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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M.Y.H. Farag 《The European Physical Journal A - Hadrons and Nuclei》2001,12(4):405-411
Glauber's theory has been adopted to calculate the total heavy-ion reaction cross-sections at high energies. At relatively
low energies, Glauber's total reaction cross-section has been modified in order to take into account the Coulomb field effect
and is called modified Glauber model I. In addition to the Coulomb field effect, the nuclear effect has also been taken into
account in the Glauber model and is called modified Glauber model II. An analytical expression for the transparency function
for heavy-ion reactions, involving the nuclear densities of the colliding ions and the nucleon-nucleon cross- section, has
been obtained within the framework of the modified Glauber models I and II. The transparency and the total reaction cross-sections
of the 12C + 12C collisions are calculated at different bombarding energies. The obtained results are in good agreement with the experimental
data and with previous theoretical calculations.
Received: 26 January 2001 / Accepted: 15 October 2001 相似文献
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LI Jia-Xing LIU Ping-Ping WANG Jian-Song HU Zheng-Guo MAO Aui-Shi SUN Zhi-Yu LI Chen CHEN Ruo-Fu XU Hu-Shan XIAO Guo-Qing GUO Zhong-Yan 《中国物理C(英文版)》2010,34(4)
The mirror nuclei ~(12)N and ~(12)B are separated by the Radioactive Ion Beam Line in Lanzhou (RIBLL)at HIRFL from the breakup of 78.6 MeV/u ~(14)N on a Be target. The total reaction cross-sections of ~(12)N at 34.9 MeV/u and ~(12)B at 54.4 MeV/u on a Si target have been measured by using the transmission method.Assuming ~(12)N consists of a ~(11)C core plus one halo proton, the excitation function of ~(12)N and ~(12)B on a Si target and a C target were calculated with the Glauber model. It can fit the experimental data very well. The characteristic halo structure for ~(12)N was found with a large diffusion of the protons density distribution. 相似文献
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《中国物理快报》2017,(2)
The thick target neutron yields(TTNYs) of deuteron-induced reaction on Al and Cu isotopes are analyzed by combining the improved nuclear models and particle transport effects. The modified Glauber model is employed mainly to produce the peak of double differential cross section for the breakup process, and the exciton model and the Hauser-Feshbach theory are used for the statistical processes. The thin-layer accumulation method is used to calculate the TTNYs considering the neutron attenuation effects in the target. The calculated results are compared with the existing experimental data, and the analysis method can predict the data well at the deuteron energy of 40 MeV. 相似文献