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用QMD方法,对20Ne (25MeV/A)+20Ne系统周边碰撞做了仔细的分析,讨论了它的特征,以及深部非弹碰撞与碎裂的共存和竞争,并探索了中间质量碎片的来源. 相似文献
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卢朝晖 吴和宇 胡荣江 诸永泰 张保国 李祖玉 魏志勇 段利敏 王宏伟 肖志刚 王素芳 靳根明 郭忠言 肖国青 朱海东 柳永英 陈克良 陈陶 李湘庆 李智焕 《中国物理 C》2002,26(6):594-599
采用逆运动学方法对放射性核束17F和18Ne与质子进行弹性散射实验,得到了实验测量微分截面.用较准确描述放射性核素性质的CH89参数化的光学势为初始光学势,用扭曲波玻恩近似的理论计算程序DWUCK4和自动参数搜索程序ABOD对实验数据进行光学势参数理论拟合,得到了与实验数据相符合的光学势参数.将得到的光学势参数进行分析,得到了17F和18Ne实势相互作用均方根半径分别为3.239fm和3.317fm. 相似文献
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谢元祥 罗清政 卢俊 B.Kotlinski H.W.Wilschut P.C.N.Crouzen H.Kaper E.E.Koldenhof H.K.W.Leegte R.H.Siemssen 《中国物理 C》1994,18(11):982-989
在294MeV 20Ne轰击159Tb靶的反应中,用△E—E望远镜测量了10°—150°发射的中等质量碎片(290°)这些能谱是钟罩型,峰位接近于出射道的库仑位垒.用运动源模型分析了这些能谱,结果说明这些碎片来自于共同的源—非完全熔合所形成的复合核.用统计模型GEMINI程序拟合了碎片的电荷分布和角分布,计算值和实验值很好的符合证实了中等质量碎片来源于复合核非对称的两体衰变. 相似文献
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本文把用于处理重离子引起的单粒子转移反应的Goldfarb-Buttle方法推广到多粒子转移反应。计算了12C(7Li,t)16O和20Ne(d,6Li)16O反应,用了16O的全相干波函数,考虑了某些反冲因素,并将结果与实验作了比较。 相似文献
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谢元祥 胡晓庆 B.Kotlinski H.W.Wilschut P.C.N.Crouzen H.Kaper E.E.Koldenhof H.K.W.Leegte R.H.Siemssen 《中国物理 C》1993,17(3):283-288
在294MeV Ne束轰击Tb靶的反应中,用ΔE-E望远镜测量了10°—150°发射的α粒子能谱,并用运动源模型拟合了所得的实验能谱,得到与前角度源、中等速度源、熔合蒸发源的有关参数.计算谱很好地复现了实验能谱的形状、峰位信数值,角分布也得到极好的模拟.实验所得的发射α粒子截面为3300mb,运动源模型计算值为3700mb. 相似文献
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A. A. Kurteva V. E. Mitroshin 《Bulletin of the Russian Academy of Sciences: Physics》2011,75(4):580-584
The energies, magnetic dipole and electric quadrupole moments, spectroscopic factors of the ground and excited states of 109Ag and 107Ag, the reduced probabilities of electromagnetic transitions between them, and the reduced probabilities of β transitions
from the ground states of 109Cd and 107Cd to the excited states of 109Ag and 107Ag were calculated on the basis of the dynamic collective model. The vacuum fluctuations of quasiparticles and multiphonon
(up to 10 phonons) states of the main band of the even-even core were taken into account. The calculation results show good
agreement with the experimental data. 相似文献
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In this study,218Ac and 221Th nuclides were produced via the heavy-ion induced fusion evaporation reaction 40Ar+186W.Their decay properties were studied with the help of the gas-filled recoil spectrometer SHANS and a digital data acquisition system.The cross section ratio between 222Pa and 218Ac was extracted experimentally,withmeasured value 0.69(9).Two new possible α decay branches to 221Th are suggested.The valence neutron configurations for the daughter 217Ra are discussed in terms of the hindrance factors. 相似文献
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A.N. Akour A.S. Sandouqa B.R. Joudeh H.B. Ghassib 《Chinese Journal of Physics (Taipei)》2018,56(1):411-422
The many-body phase shifts for 20Ne gas are calculated for low number densities in the temperature-range 27–36?K, using the Galitskii-Migdal-Feynman formalism. These phase shifts are inserted in the Beth-Uhlenbeck formula to determine the quantum second virial coefficient. This is compared to the classical coefficient as well as to the experimental values and other theoretical results. It is used to investigate the pressure-volume-temperature behavior of the gas and to compute other thermodynamic properties – the Helmholtz free energy, total internal energy, entropy, and specific heat capacity – for a number density of 1×?1027 atoms/m3. Our results show that, in cooling and compressing the system, vapor-liquid condensation always occurs. 相似文献
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S. V. Artemov M. K. Baktybayev N. Burtebaev D. T. Burtebaeva A. A. Karakhodzhaev M. A. Kayumov S. B. Kuranov G. K. Nie G. A. Radyuk E. A. Zaparov 《Bulletin of the Russian Academy of Sciences: Physics》2011,75(7):920-924
The differential cross sections of the 10B(d,t)9B and 10B(d,3He)9Be reactions at E
d = 25 MeV were measured to obtain the ratio of asymptotic normalization coefficients for the bound states of the last neutron
and the last proton in the symmetric nucleus 10B. The obtained ratio is shown to be in agreement with the theoretical value. 相似文献
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The resonance states in 16O+16O, 12C+16O, α+16O and α+12C are described using modified Morse potential proposed earlier whose success has already been demonstrated in the case of
12C+12C system. The general validity of such a potential with long range, shallow depth and repulsive soft core determined from
the resonance data itself is being examined through the present study of the resonances in the above four systems. In each
system, the experimental data of a large number of states have been successfully described with a modified Morse potential.
The success points out a common mechanism of the origin of these states, and reaffirms authentically the diatomic-like rotational
and vibrational picture of the nuclear molecular resonances proposed previously. The close resemblance between the physics
of diatomic molecules and nuclear molecular resonances extending to the level of potential which is Morse type in both the
cases — although belong to two different areas of physics — is further strengthened through the present study.
相似文献
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利用能量为170MeV左右的36Ar重离子束轰击96Ru和106Cd浓缩同位素靶,分别生成缺中子同位素130Nd和140Tb.借助氦喷嘴带传输系统,用X–γ和γ–γ符合方法,分离鉴别了这两种核素,并进一步测定了它们的衰变性质.得到130Nd的半衰期为(13±3)s,首次建议了它的EC/β+衰变纲图,推测了其子核130Pr的基态和低位能级的自旋宇称.修订了140Tb的原有极简单的EC/β+衰变纲图并指认140Tb的基态自旋宇称为7+. 相似文献
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E. P. Shabalin 《Physics of Atomic Nuclei》2010,73(11):1908-1915
The unitarization of the amplitude for the decay process K
10 → π+π− and allowance for the rescattering of final-state pions in the decay process K
+ → π+π+π− make it possible to evaluate, by using the parameters extracted from data on K → 2π decays, the K
+ → π+π+π− decay width. The result agrees with the experimental width value at a level of a few percent. Allowance for corrections for
higher order terms of the momentum expansion of the amplitude for the decay process K
+ → π+π+π− leads to the slope-parameter value of g
++−th = 0.2182, which agrees with its experimental counterpart, g
++−exp = 0.2154 ± 0.0035. 相似文献
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