共查询到8条相似文献,搜索用时 62 毫秒
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测量了200AGeV的~(32)S及其碎片P,si,Al,Mg,Na和Ne与Cu靶作用的电荷改变总截面。观察到次级碎片的电荷改变总截面比相同电荷的初级粒子的要高。导出的电磁散裂截面与弹丸电荷的平方成比例,与理论预言一致。 相似文献
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测量了200A GeV 32S核与Cu作用产生的重碎片P,Si,Al和Mg的角分布,得出它们的横动量分布宽度σpt在130—270MeV/c的范围. 相似文献
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电荷半径是原子核最基本的物理观测量之一,反映了原子核内的质子分布。精确的电荷半径测量是研究奇特原子核结构的重要手段。在相对论能区,通过高精度测量原子核的电荷改变截面来提取电荷半径是近年来发展起来的一种新方法,这种方法尤其适于探索产额很低的奇特原子核。自2013年以来,北京航空航天大学-中国科学院近代物理研究所课题组基于兰州第二条次级束流线(RIBLL2),提出并建成原子核电荷改变截面测量平台,研制了相关的TOF-△E探测器系统,开展了轻核区二十余个原子核的电荷改变截面的实验测量工作。介绍了实验平台研制情况、初步结果以及下一步计划。Charge radius is one of the most fundamental observables of atomic nuclei, reflecting the proton distributions in nuclei. Their precision measurements have severed as a key tool to study nuclear structure. Recently, a novel method to deduce charge radii has been developed via precise measurements of charge-changing cross sections(CCCS) of exotic nuclei at relativistic energies. This method is in particular suitable for investigation of exotic nuclei with low production yield. In 2013, we proposed to make such measurements for exotic nuclei lighter than oxygen based on the RIBLL2 beam line. Since then, the TOF-△E detector system for particleidentification(PID) and the CCCS platform have been constructed, continuously optimized and tested. So far CCCS measurements on a carbon target have been performed for more than 20 isotopes. In this contribution, we will introduce the progress of detector development, the progress in PID, and our experimental progress and plan. 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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