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本文指出, 无质量Bose子和Kerr-Newman黑洞不形成束缚态. 有质量的Bose子, 在0<α<√M2-Q2的情况下, 若E≠am+eQr+/2Mr+-Q2则无束缚态; 若E=am+eQr+/2Mr+-Q2则非束缚态存在的必要条件是(22)和(24)式. 在a=√M2-Q2的情况, 束缚态的能量E=√M2-Q2+eQM/2M2-Q2, 当Q=0或者e=0时, 本文结论与de Felic[1]和章世伟、苏汝铿[2]的结果相符. 相似文献
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用生态坐标方法(GCM)[1]a考虑集体3-态与非集体粒子空穴对(ph)l+耦合模型计算了铅(208)3-集体态的电四极知Q[3-]、电八极约化跃迁几率B(E3)和跃迁密度ρtr3-随核的径向距离r的变化曲线. 结果是:Q[3-]=-0.098eb1),B(E3)=38w.u.2). 计算中没有像通常那样假设一个有效核子电荷而是在GCM框架下考虑核心激发进行微观计算, 其结果与实验符合, 说明GCM能够对核元激发的耦合作微观研究. 相似文献
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本文利用质子存在粲夸克态│uudcc〉, 将它的效应和原有的Buras等人计算的结果迭加起来, 能够使e-p深度非弹性散射中所预言的纵横虚光子吸收截面比R=σL/σT与实验值较好地符合. 相似文献
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采用压力光谱技术在低温下观测到了Mn2+离子的4T1→6A1跃迁,该谱线在Zn0.83Mn0.17Se和ZnSe/Zn0.84Mn0.16Se超晶格样品中有不同的压力行为,体材料中其压力系数为-42.4 peV/Pa,超晶格中为-29.5 peV/Pa。用晶体场理论计算得到体材料Zn0.83Mn0.17Se中Mn2+离子4T1→6A1谱线的压力系数为-38.3 peV/Pa,与实验结果基本一致。结合材料中发光峰积分强度随压力的变化关系进行分析,证实Mn2+离子的发光性质主要与其近邻的晶体场环境有关。 相似文献
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本文半唯象地基于无规独立产生子夸克和相空间考虑的简单图象,计算了S1/2~4—7GeV能区的夸克喷注强子化的强子纵动量和能量分布S/β dσ/dxp和S/β dσ/dxE行为。它们与实验符合得相当好,本文还给出喷注中两个粒子关联截面dσ/(dx1Edx2E),有待实验检验。 相似文献
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The centrality dependence of transverse momentum spectra for identified hadrons at midrapidity in Au+Au collisions at √sNN= 200GeV is systematically studied in a quark combination model. The pT spectra of π±, K±, p(p) and Λ(Λ) in different centrality bins and the nuclear modification factors (RCP) for these hadrons are calculated. The centrality dependence of the average collective transverse velocity 〈β(r)〉 for the hot and dense quark matter is obtained in Au+Au collisions, and it is applied to a relative smaller Cu+Cu collision system. The centrality dependence of pT spectra and the RCP for π0, Ks0 and Λ in Cu+Cu collisions at √sNN= 200GeV are well described. The results show that 〈β(r)〉 is only a function of the number of participants Npart and it is independent of the collision system. 相似文献
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在考虑费米运动修正和核内核子束缚能作用的基础上,进一步引入Q2式x重新标度机制,可以解释EMC效应的主要特性.而且,引入x重新标度可以比Q2重新标度更好地符合实验数据,特别是在0,22式x重新标度参数,结果发现,新的x重新标度机制给出的计算结果可以更好地符合小x区域的实验数据. 相似文献
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Based on the Weinberg-Salam theory, the pair neutrino energy loss rates for nuclei 56Fe are canvassed for the wide range of density and temperature. The results of ours (QLJ) are compared with those of Beaudet G, Petrosian V and Salpeter E. E's (QBPS), and it shows that the pair neutrino energy loss rates of QBPS are always larger than QLJ .The QBPS is 12.57%, 12.86%, 14.99%, 19.80% times higher than QLJ corresponding to the temperature T9=0.385, 1.0, 5.0, 10, respectively. 相似文献
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本文从e+e-湮灭的次级粒子的横动量分布的表示式中, 导出了当m⊥>>T时横质量m⊥的平均无标度性. 相似文献
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Nuclear structure of proton-rich unstable nucleus 28P has been studied by measuring its g-factor for the first time. The g-factor of 28P (Iπ=3+, T1/2=270.3 ms) was measured by means of β-NMR technique combined with the new polarization technique for charge exchange reaction product in the intermediate energy heavy ion collisions. The obtained g-factor of g=0.1028(27) is very much quenched from the Schmidt value, but is well reproduced by the shell model (+0.102). In connection with the magnetic moment of the mirror partner and the β-ray transition probability, the orbital angular momenta and intrinsic spins of protons and neutrons have been determined as 〈lp〉=0.43(29), 〈ln〉=1.85(29), 〈Sp)=0.28(4), and 〈Sn〉=0.44(4). 相似文献