共查询到20条相似文献,搜索用时 62 毫秒
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16O+16O弹性散射在124MeV能量下最新的全角区的实验角分布,可以被建立在16O的α结构基础上的折叠模型很好地再现. 相似文献
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用电离室△E-E望远镜测量了19F+208Pb体系在88、91.93、96.98、102MeV6个能量点的准弹反应角分布,用ECIS程序拟合弹性散射角分布,得到该体系的光学势参数,观察到明显的“阈异常”现象,对转移反应角分布作了分析,得到了产物为C、N、O的转移反应的激发函数,此外,导出了3个主要转移反应道208Pb(19F、18O、15N、14C)的转移几率和最趋近距离的关系,得到斜率因子κ. 在单核子转移的情况下,κ值与半经典计算基本符合;而对于两核子以上转移的情况,k值小于理论值,存在着“斜率反常”的现象. 同时发现k值明显与能量相关,这无法用半经典理论解释. 相似文献
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应用核分子轨道理论(LCNO)和宇称相关势的折叠模型,研究了16O+12C全熔合截面中所呈现的粗共振结构,该系统的全熔合截面和弹性散射激发函数及角分布的实验数据都得到了较好地解释. 相似文献
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本工作采用在束γ谱学技术,入射能量步长为0.30MeV,测量了41.6—50.0MeV 16O+24Mg反应的全熔合激发函数.实验结果表明,激发函数不是平滑的,似乎呈现较大的起伏,这些起伏的峰值对应于质心系能量为27.6和28.9MeV. 相似文献
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S.E. Koonin 《Physics letters. [Part B]》1976,61(3):227-230
Head-on collisions between 16O nuclei are treated in the Time-Dependent Hartree-Fock (TDHF) approximation. Reactions at center-of-mass bombarding energies of 2 and 8 MeV per nucleon result in fusion-fission processes with strong internal excitation of the fragments. 相似文献
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Using the Landau-Zener approximation, we have calculated probabilities for inelastic processes and fusion for head-on collisions of 16O + 16O. For fusion the results show the importance of reaching a critical distance between the two ions. 相似文献
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Shigeo Ohkubo 《Acta Physica Hungarica A》2003,18(2-4):287-288
The molecular structure with the 16O+16O configuration in 32S and the superdeformed structure in 32S are discussed from the viewpoint of the cluster model. 相似文献
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Taking 16O+16O elastic scattering at 124 MeV as an example, we show that a barrier-wave-internal-wave decomposition of the elastic scattering amplitude provides valuable information on the light heavy-ion interaction and complements the more conventional nearside-farside decomposition. In particular, we show that the Airy minima present in the angular distributions are due to a barrier-wave-internal-wave interference mechanism, which sheds additional light on the exceptional transparency displayed by some light heavy-ion scattering systems. Extension of these ideas to other fields, like atomic and molecular collision physics, could prove rewarding. 相似文献
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The observation of refractive effects in 16O+16O and 16O+12C elastic scattering data has definitively established the fact that the optical potential for some light heavy-ion systems is relatively transparent and that its real part is deep. Most of the interpretations of the rainbow features of these data rely on the so-called nearside-farside decomposition of the scattering amplitude. Starting from recent optical model analyses of 16O+16O and 16O+12C elastic scattering around 100 MeV incident energy as an example, we present an alternative interpretation based on the barrier-wave/internal-wave decomposition first proposed by Brink and Takigawa. This method, which complements the nearside-farside approach, demonstrates clearly the exceptional transparency of the 16O+16O, and to a lesser extent 16O+12C, interactions at the investigated energies and makes possible the extraction of the two contributions whose interference explains the Airy oscillations seen in the farside amplitude. 相似文献
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Rudchik A. T. Zelinskyi R. M. Kemper K. W. Chercas K. A. Rudchik A. A. Pirnak Val. M. Plujko V. A. Ponkratenko O. A. 《The European Physical Journal A - Hadrons and Nuclei》2013,49(6):1-7
The European Physical Journal A - Existing data for the 6Li + 16O elastic scattering at $ E_{c.m.}=3.27$ -36.8MeV were analyzed within the optical model and coupled-reaction-channels method. The... 相似文献
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The partial production cross sections for reaction residues produced by the fusion of 16O with 16O have been measured at Ec.m = 9–30 MeV by detecting the characteristic γ-rays with a Ge(Li) detector. The dominant products are 24Mg and 27A1 corresponding to 2α and αp emission from the compound nucleus, respectively. The total γ-producing cross sections σR were also derived by summing the partial cross sections after correction for the observed (average) γ-ray angular distributions. The trend in the total cross sections is very similar to the trends derived from an optical model or a statistical-evaporation model calculation. The partial production cross sections were compared with other experimental results at 11.9 MeV and 30 MeV and with the results of the statistical-model calculation. It is concluded that the treatment of angular momentum in the calculation is inadequate for describing the partial cross sections. Structure in the partial and total cross section excitation functions is observed with minima occurring at Ec.m. = 27, 24, 20, 17.5, and possibly 15 MeV. Some of this structure is well established by the statistical accuracy of the data and most, but perhaps not all of it, is correlated in the various channels. This structure is compared with that observed in another experiment and some of its implications are discussed. 相似文献
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A barrier-top-resonance model calculation is found adequate to describe the gross structure behavior thus far observed in inelastic scattering excitation functions. 相似文献