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One of the cluster behaviors observed in light nuclei such as20 Ne and44 Ti is the presence of an alpha particle rotating around a double magic number core. In this work, a theoretical method is used for investigation of rotational spectra of two-particle cluster states. To this end, Deng-Fan potential in addition to Hellman potential is used as the core and cluster potential. Next, given the Wildermuth condition, and proper quantum numbers describing the relative motion of the alpha particle and core, the rotational levels of20 Ne and44 Ti isotopes are calculated. Our studies show that the results are in good agreement with the available data. 相似文献
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运用投影壳模型研究了正常形变丰中子核同位素102,104Nb的低能级能谱, 并指定了它的准粒子组态, 理论计算所得到的能谱曲线与实验给出的能谱曲线非常一致, 说明了投影壳模型对研究重核低能级谱非常有效。 The Projected Shell Model(PSM) is used to study the low energy scheme of the neutron rich normal deformed isotopes of odd odd nuclei 102, 104Nb. The quasiparticle configuration is assigned. The theoretical calculations of the energy band of 102,104Nb could well reproduce the experimental data. It is shown that PSM is a valid method for studying the low energy scheme of heavy nuclei. 相似文献
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XU Chang Zhong-Zhou 《理论物理通讯》2006,46(3):533-537
We investigate the ground-state rotational bands of nuclei with Z 〉 100 using cluster model proposed by Buck et al. [Phys. Rev. Left. 94 (2005) 202501]. The core-duster decomposition of each nucleus is determined by the corresponding electric quadrupole transition strength B(E2 : 2^+ → 0^+). The theoretical spectra of fermium and nobelium isotopes are compared with available experimental data. Good agreement between model and data is obtained. 相似文献
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XU Chang REN Zhong-Zhou 《理论物理通讯》2006,46(9)
We investigate the ground-state rotational bands of nuclei with Z ≥ 100 using cluster model proposed by Buck et al. [Phys. Rev. Lett. 94 (2005) 202501]. The core-cluster decomposition of each nucleus is determined by the corresponding electric quadrupole transition strength B(E2 : 2 → 0 ). The theoretical spectra of fermium and nobelium isotopes are compared with available experimental data. Good agreement between model and data is obtained. 相似文献
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利用在束γ谱学方法,通过反应144Sm(28Si,1p3n)169Re研究了169Re的激发态能级结构.实验进行了X-γ符合、γ-γ符合、DCO系数和带内B(M1)/B(E2)比率测量.基于这些测量,建立了组态为π9/2-[514]的强耦合带和组态为π1/2-[541]的退耦合带.通过比较169Re的转动带与邻近奇质子核已知转动带的结构和B(M1)/B(E2)比率,指定了169Re转动带的组态.实验观测到π9/2-[514]和π1/2-[541]转动带的中子AB带交叉的转动频率分别为0.23和0.27MeV.着重讨论了169Re转动带的中子AB带交叉频率、转动角动量顺排和旋称劈列等,并讨论了奇ARe核转动带结构的系统性 相似文献
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利用在束γ谱学技术和173Yb(18O, 4n)熔合蒸发反应研究了187Pt的高自旋态能级结构. 建立了包括3个转动带的187Pt高自旋态能级纲图. 基于187Pt周围核结构的系统学和比较带内B(M1)/B(E2)比率的实验值和理论值, 建议上述3个转动带的组态
分别为11/2+[615], 7/2-[503]和1/2-[521]. 对各转动带的带交叉频率、顺排增益、旋称劈裂等进行了讨论. 相似文献
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A new formula, which is derived from a deformed rotor model for describing nuclear rotational spectra, is analyzed. The ground band of most even-even rare-earth and actinide nuclei are accurately reproduced using a damped nonlinear least-square fitting procedure for determining parameters of the theory. The results show that energy spectra obtained from a deformed rotor model are more accurate than those from a three-parameter formula based on perturbation theory. 相似文献
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在利用Harris两参数公式研究Bohr-Mottelson转动谱公式参数之间的关系的基础上,改用Harris三参数公式,并由此提出了Bohr-Mottelson转动谱公式参数之间的新关系式,进而用I(I+1)四参数展开式计算了A~60,80,130,140,150,190区超形变偶偶核的基带和锕系和稀土区正常形变核基带,讨论了参数之间的关系,发现新关系式与实验较好地符合. 相似文献
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通过对锕系和稀土偶偶核基带转动谱实验数据的拟合和Mallmann图的研究,系统地分析了量子群Uqp(u2)模型对原子核转动谱的适用性.结果表明,Uqp(u2)模型的理论值与实验值比较接近,明显优于单参数形变量子代数SUq(2)模型.此外,还建立了Uqp(u2)的形变参量q、p与核软度的关系. 相似文献
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系统地考察了稀土核区三轴超形变带的跃迁能量、角动量增量顺排和动力学转动惯量.研究表明这些三轴超形变带为全同带. 相似文献
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简述了超形变原子核全同带的研究进展情况,并以Bohr-Mottelson的I(I+1)展开转动谱公式对部分典型的超形变带进行了分析.发现所谓全同带的确只是两个带的J(2)比较接近,它们的J(1)和J0并不相等,而且signature对偶带更接近全同. 相似文献
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With the supersymmetry scheme including many-body interactions, the global property and the △I = 4bifurcation in the superdeformed (SD) bands of odd-odd nuclei in A ~ 150 mass region are investigated systematically.Good results for the γ-ray energies, the dynamical moments of inertia, and energy differences △ Eγ - △ Erefγ are obtained.It shows that this approach is quite powerful in describing not only the SD bands in even-even and odd-A nuclei butalso those in odd-odd nuclei in the mass region. 相似文献
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简述了若干转动谱理论及其对超形变带的应用 ,并用 Bohr- Mottelson的 I(I+1 )展开公式分析了 A=1 90区超形变带的性质和指定了它们的能级自旋 ,用 Harris的ω2 展开公式 J(1) =2α+(4/3 )βω2 +(6 /5 )γω4分析了 A=1 5 0区 Tb和 Dy同位素 2 0条超形变带的性质 ,指定了它们的能级自旋 .对于首次发现的152 Dy(1 )超形变带 ,带首自旋指定为 2 6 h,与实验结果更加符合. The recent developments of rotational spectral theories and its application to superdeformed bands were briefly reviewed. The superdeformed bands in A ≈190 region were analyzed and the spins of energy level were determined by the least square fitting experimental transition energy with the formula of Bohr Mottelson’s I(I+1) expansions. The superdeformed bands in A ≈150 region were analyzed by using the kinematic moments of inertia formula J (1) =2α+(4/3)βω 2+(6/5)γω 4 in... 相似文献
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首先概述了对A≈150区超形变带的自旋指定的进展情况, 到目前为止, 所提出的各种方法对该区超形变带自旋值的指定并不一致. 发现了该区超形变带的实验能谱特性和动力学转动惯量的特性. 并将此特性用于指定A≈150区超形变带的自旋. 相似文献