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轻核(n,x)反应微分截面的实验测量

张国辉 , 陈金象 , 唐国有 , 施兆民 , 陈泽民 , Yu.M.Gledenov , M.Sedysheva , G.Khuukhenkhuu

原子核物理评论 doi:10.3969/j.issn.1007-4627.2004.04.041

对本课题组十几年来的(n, x)反应实验研究工作进行了评述. 介绍了屏栅电离室的特点、构造与工作原理. 用屏栅电离室在北京大学4.5 MV静电加速器上测量了1-7 MeV中子6Li(n, t)4He和10B(n, α)7Li反应的微分截面与截面, 对实验结果进行了讨论.

关键词: 屏栅电离室 , 轻核 , (n,x)反应 , 微分截面

Investigations of the g factors of Fe+ in MgO and CaO

Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences

The g factors of Fe+ in MgO and CaO are theoretically investigated by the perturbation formula of the g factor of a V ion in cubic octahedral symmetry based on the cluster approach. By considering the partial quenching of the spin-orbit c...

关键词: electron paramagnetic resonance;crystal- and ligand-field theory;Fe+;MgO;CaO;atomic screening constants;electron spin resonance;paramagnetic-resonance;orbit interaction;scf functions;crystals;spectra;oxide;co2+

Investigations of the g factors for Co2+ in fluoroperovskites

Physica B-Condensed Matter

The perturbation formula of g factor for 3d(7) ion in cubic octahedral crystals has been obtained from a cluster approach. In the formula, the parameters related to the configuration interaction and the covalency reduction effect can be obtained from the optical spectr...

关键词: electron paramagnetic resonance;crystal- and ligand-field theory;Co2+;LiBaF3;KMgF3;KZnF3;CsCdF3;perovskite;transition;impurities;crystals

利用(G’/G)展开法求解广义变系数Burgers方程

庞晶 , 靳玲花 , 应孝梅

量子电子学报 doi:10.3969/j.issn.1007-5461.2011.06.005

近年来,变系数非线性发展方程受到越来越多的关注. 2008年王明亮等提出了一种新的方法,即(G’/G)展开法.将(G

关键词: 非线性发展方程 , 精确解 , (G’/G)展开法 , 广义变系数Burgers方程

应用改进的G/G'展开法求ZS方程的精确解

冯庆江 , 杨世玲

量子电子学报 doi:10.3969/j.issn.1007-5461.2013.06.007

应用改进的G/G'展开法构造出Zhiber-Shabat(ZS)方程的20组精确解,这些解的类型主要包含双曲函数通解、三角函数通解和有理函数通解三种形式.对解的性质进行了相应分...

关键词: 非线性方程 , 改进的G/G'展开法 , ZS方程 , 孤立波解 , 周期波解

应用改进的G'/G2展开法求Zakharov方程的精确解

冯庆江 , 肖绍菊

连铸 doi:10.3969/j.issn.1007-5461.2015.01.006

应用改进的G'/G2展开法构造出Zakharov方程的18组精确解,这些解主要包括双曲函数通解、三角函数通解和有理函数通解三种形式.当对双曲函数通解中的参数取特殊值时,可以得到...

关键词: 非线性方程 , 改进的G'/G2展开法 , Zakharov方程 , 孤立波解

Investigations of the EPR g factors for Er3+ in CaMoO4

Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences

The electron paramagnetic resonance (EPR) g factors g(parallel to) and g(perpendicular to) for Er3+ in CaMoO4 are theo retically investigated by using the perturbation formulas of the

关键词: electron paramagnetic resonance (EPR);crystal- and spin Hamiltonians;Er3+;CaMoO4;electron-paramagnetic-resonance;superposition-model;molybdate;crystals;calcium molybdate;ion;spectroscopy;parameters;tungstate;liyf4

A study of the temperature dependence of g factor for MgO:V2+ crystal

Physica B-Condensed Matter

The temperature dependence of EPR g factor for MgO:V2+ crystal has been studied theoretically by considering both the static contribution due to the thermal expansion of crystal and the vibrational contributions due to the electron-phonon interaction of the acoustic an...

关键词: impurities

CALCULATION OF THE SPIN-LATTICE COUPLING-COEFFICIENTS G11 AND G44 FOR GAP-FE(3+) CRYSTAL

Nuovo Cimento Della Societa Italiana Di Fisica D-Condensed Matter Atomic Molecular and Chemical Physics Fluids Plasmas Biophysics

A uniform und simple method suitable to all d(n) ions is established for the calculation of spin-lattice coupling coefficients G11 and G44 in T(d) symmetry. According to the method, the coefficients G11 and ...

关键词: level splitting and interaction;electron paramagnetic resonance and;relaxation;crystal and ligand fields;d-orbital theory;ions