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用790MeV136Xe轰击56Fe靶,测量了类靶碎片的质量数和原子序数。探测且鉴定了四个丰中子同位素54Ti,56V,57V,58Cr。同时提供了55Ti,58V,59Cr存在的可能性。使用西德重离子研究中心的磁谱仪和磁分析一起进行了飞行时间和ΔE-E测量,同位素鉴定是可靠的。 相似文献
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The level schemes of neutron-rich nuclei,141Xe、152Ce、153Nd and 160Sm have been established for the first time through measuring the prompt γ-rays from spontaneous fission of 252Cf.The highest spin state is up to 16+.The collective band structures in these neutron-rich nuclei are discussed. 相似文献
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16O(16O, 12C)20Ne反应微分截面中的振荡结构在核分子轨道理论框架下, 基于由共价道到离子道的α转移机制得到满意的解释. 相似文献
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测量了50MeV的11B束在40Ar上的弹性散射角分布和单质子转移反应40Ar(11B, 10Be)41K的微分截面. 用光学模型拟合了弹性散射截面. 用包含反冲效应的精确有限程扭曲波玻恩近似(EFR-DWBA)分析了微分截面, 提取了谱因子. 相似文献
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YU Yong XIE Yuan-Xiang XU Shu-Wei LI Zhan-Kui PAN Qiang-Yan WANG Chun-Fang XING Jian-Ping ZHANG Tian-Mei 《中国物理C(英文版)》2001,25(2):108-114
Isotopes,130Nd and 140Tb were produced using enriched targets 96Ru and 106Cd, respectively,bombarded by 36Ar ion beam. The two nuclides were identified and studied by a He-jet tape transport system in combination with "X-γ" and "γ-γ" coincidence measure- ments. The half-life of 130Nd was determined to be (13±2)s. The EC/β+ decay scheme of 130Nd was proposed for the first time, and the spins and parties of the ground-state and observed low-lying states in the daughter nucleus 130Pr were speculated tentatively. The previous simple EC/β+ decay scheme of 140Tb was revised, and the spin-parity of its groundstate was assigned to be 7+. 相似文献
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π-核双电荷交换反应的强度与反应过程的两核子转移的核谱振幅直接联系着. 本文讨论了这类反应与它们的核谱因子的关系. 并以26Mg(π+, π-)26Si为例, 用两种核结构讨论了它的激发函数和微分截面. 我们所用的理论方法能够解释实验数据. 相似文献
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XIE YuanXiang XU ShuWei Li ZhanKui YU Yong PAN QiangYan WANG ChunFang ZHANG TianMei LONG GuiLu LI YanSong 《中国物理C(英文版)》2000,24(8):719-724
130Pm and 128 Pr were produced by irradiation of 96Ru with 171MeV 36Ar beam,and a He-jet recoil tape transport system transported radioactivities to shielded reigon. Based on X-γ-t and γ-γ-t coincidence measurements ,the (EC+β+)decay scheme of 130Pm was proposed for the first time and the (EC+β+)decay scheme of 128Pr was revised. 相似文献
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ZHAO You-Xiong GUO Zhong-Yan ZHU Yong-Tai ZHAN Wen-Long HU Xiao-Qing XI Hong-Fei LIU Guan-Hua ZHOU Jian-Qun FENG En-Pu YIN Shu-Zhi WEI Zhi-Yong Fan En-Jie MA Yu-Gang 《中国物理C(英文版)》1992,16(11):1022-1029
The energy spectra and angular distribution of α particles emitted from 12C induced reactions with 58Ni,115In and 197Au have been measured.Three moving sources of emitting α particle are clearly seen from invariant cross section distribution in velocity coordinates.The experimental data were analyzed by using three moving sources.Extracted parameters of the source with half-beam velocity are in agreement with the systematic values from Fermi Gas Model.The energy spectra and the extracted parameters for various targets are discussed.The low energy peak in energy spectra is possibly from the emitted α particle from equilibrium system after pre-equilibrium emission of target-like products.The energetic α particles are mainly from projectile fragmentation and projectile-like fragmentation. 相似文献
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使用VMI模型计算156Er和162Er的转排角动量时, 发现一对核子拆对、转排时两核有不同性质的形状跃迁. 相似文献
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通过对相邻奇A核转动带的回弯行为的分析,无法肯定162,164Er,164,166Yb,168Hf诸核的回弯机制。本文利用HFB推转模型,计算了这些核的排列角动量i(ω)和回弯的临界角频率ωc,探讨了阻塞效应的影响,通过和实验值的比较,确定了它们出现回弯均是由于一对i13/2中子转动排列的结果。 相似文献
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Yin Shuzhi Zhu Yongtai Zhan Wenlong Guo Zhongyan Hu Xiaoqing Xi Hongfei Liu Guanhua Zhou Jianqun Fan Enjie Feng Enpu Wang Xiaoqiu 《中国物理C(英文版)》1994,18(8):673-679
Energy spectra of complex fragments emitted in the reactions of 46.7MeV/u 12C with different targets 197Au,115In and 58Ni have been measured by telescopes,consisting of a gis ionization counter followed by a position Sensitive semiconductor detector.Tha most probable kinematical energies.Ep of complex fragments and temperature parameters of long-live intermediate systems have been deduced by complex fragment ernergy spectra.The experimental values of Ep are lower than the calculated ones by E=Vcoul+2T.The experimental values of complex fragment yields can be reproduced by simple A.Friedman statistical evaporation model satisfactorily. 相似文献
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Spectra and angular distributions of the(α,d)reactions on 56Fe 57Fe and 59Co have been measured with the △E-E telescopic systems and Q3D magnetic spectrometer at a bombarding energy of 35MeV from the HI-13 Tandem,and analyzed with microscopic DWBA.Among the angular distributions of nine levels strongly populated by 56Fe(α,d)58Co reaction, the experimental data of 6.79MeV and 6.4MeV levels in 58Co were analyzed and discussed. The highest stretched configuration (1g9/2,1g9/2)9 was found and Jπ=1+ of 6.4MeV level was determined for the first time. No isolated stretched states were observed by 57Fe 59Co(α,d)reactions.This probably means that the strength of the stretched configuration spreads on a number of states. 相似文献
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THE CROSS-SECTION MEASUREMENTS FOR 59Co(n,p)59Fe,59Co(n,α)56Mn AND 59Co(n,2n)58Co REACTIONS 下载免费PDF全文
LI Ting-Yan SHI Zhao-Min LU Han-Lin ZHAO Wen-Rong YU Wei-Xiang YUAN Xia-Lin 《中国物理C(英文版)》1990,14(6):542-550
The cross sections of 59Co(n,p)59Fe,59Co(n,α)56Mn AND 59Co(n,2n)58Co reactions have been measured at neutron energy region of 12.8MeV—17.8MeV by activation method.The coveriance matrix of measured errors was calculated,and the comparison between the values of measured and calculated using theory model was made.The evaluated excitation functions for the three reactions are given. 相似文献