Na（3P）＋Rb（5P）碰撞能量转移截面

置于同一池中的钠原子和铷原子，分别被连续染料激光器和铷光谱灯激发到Ｎａ（３Ｐ），Ｒｂ（５Ｐ），Ｎａ（３Ｐ）原子密度由吸收等效宽度技术测定，利用调制技术分离出了凡异核碰撞产生的荧光光谱，观察到了Ｎａ（３Ｐ）和Ｒｂ（５Ｐ）间的碰撞能量俣并现象，并测定了其碰撞截面。     

Na（4D）＋Na（3S）=Na（4F）＋Na（3S）碰撞能量转移截面

利用双光子吸收，将Ｎａ（３Ｓ）原子激发到４Ｄ态，测量了Ｎａ（４Ｄ）＋Ｎａ（３Ｓ）＝Ｎａ（４Ｆ）＋Ｎａ（３Ｓ）碰撞能量转移截面，因为直接由４Ｆ→３Ｄ的荧光不能探测，所以检测３Ｄ→３Ｐ级联荧光讯号。结合基态钠原子密度的测量，给出了截面值σ４Ｄ→４Ｆ－１．３×１０＾－１４±２８％（ｃｍ＾２）。     

Na（3P）十Rb（5P）碰撞能量转移截面

置于同一池中的钠原子和铷原子，分别被连续染料激光器和铷光谱灯激发到Ｎａ（３Ｐ），Ｒｂ（５Ｐ），Ｎａ（３Ｐ）原子密度由吸收等效宽度技术测定，利用调制技术分离出了由异核碰撞产生的荧光光谱，观察到了Ｎａ（３Ｐ）和Ｒｂ（５Ｐ）问的碰撞能量合并现象，并测定了其碰撞截面。     

YAG晶体中Cr~（3＋）→Tm~（3＋），Er~（3＋）→Tm~（3＋）的能量

研究了加入敏化离子Ｃｒ３＋和Ｅｒ３＋的Ｔｍ：ＹＡＧ晶体的吸收谱和荧光谱，计算了Ｃｒ３＋、Ｅｒ３＋、Ｔｍ３＋离子的２Ｅ、４Ｉ１３／２、３Ｆ４能态的平均寿命及能量；转移效率、转移速率．得出Ｃｒ３＋→Ｔｍ３＋转移效率为８０％，转移速率为２．１×１０３ｓ－１．由（Ｅｒ，Ｔｍ）：ＹＡＧ的荧光谱可见存在Ｅｒ３＋→Ｔｍ３＋的有效的能量转移．讨论了Ｃｒ３＋→Ｔｍ３＋和Ｅｒ３＋→Ｔｍ３＋能量转移的不同．     

Na(3P)+Na(3P)→Na(4F)+Na(3S)碰撞激发能量转移截面

利用激光(调离NaD_2线±20GHz)激发钠蒸汽,测量Na(3P)+Na(3P)→Na(4F)+Na(3S)的碰撞激发转移截面。因4F→3D的荧光位于红外(1.84μm),故检测3~2D_(3/2)→3~2P_(1/2)(818.3nm)和3~2D→3~2P_(3/2)(819.5nm)级联荧光信号。通过测量激光频率的Rayleigh散射光,直接D_2线荧光和敏化D_1线荧光分布,确定了钠原子密度,定出了有效辐射俘获衰变率Γ_(D_1)~e,Γ_(D_2)~e。结合激光功率吸收率的测量得到了Na(3P)的密度,从而给出转移截面σ(4F)=37A~2(±33％)。与其他作者的实验结果和理论值作了比较,进行了讨论。     

掺Ce~（3＋）、Tb~（3＋）的M_3Y_2（BO_3）_4（M＝Ca，Sr）

采用固相反应的方法；经二次灼烧合成了掺Ｃｅ（３＋）、Ｔｂ（３＋）的Ｃａ３Ｙ２（ＢＯ３）４和Ｓｒ３Ｙ２（ＢＯ３）４磷光体；分析了合成过程中铈的还原情况．用Ｘ－射线衍射分析确定了它们的结构均为正交晶系，空间群Ｐ２１ｃｎ测定了Ｃｅ（３＋）和Ｔｂ（３＋）在两种基质中的光谱，得到Ｃｅ（３＋）波长位移的某些规律，观察到Ｃｅ（３＋）对Ｔｂ（３＋）的敏化作用．     

（LaO）3BO3中Eu^3＋和Sm^3＋的光致发光

研究了紫外光激发下，（ＬａＯ）３ＢＯ３基质中Ｅｕ＾３＋和Ｓｍ＾３＋的光谱性质，Ｅｕ＾３＋和Ｓｍ＾３＋的电荷迁移激发带及发光强度随组成和结构变化的规律性，并探讨了Ｅｕ＾３＋和Ｓｍ＾３＋自身浓度猝灭的机理。     

Sr_3Ga_2Ge_4O_（14）晶体中Cr~（3＋）和Cr~（4＋）吸收光谱

采用提拉法生长了掺Ｃｒ的Ｓｒ３Ｇａ２Ｇｅ４Ｏ１４低温石榴石结构型单晶，测量了它的吸收光谱及其偏振特性，系统描述了该晶体在可见和近红外波段各吸收带的特征，指出Ｃｒ在此晶体晶格中主要存在两种价态Ｃｒ３＋和Ｃｒ４＋，Ｃｒ４＋在近红外的吸收将影响到Ｃｒ３＋的发光。     

Vacuum Ultraviolet Excited Photoluminescence Properties of Novel Na3Y9O3（BO3）8：Tb^3＋ Phosphor

The novel vacuum ultraviolet （VUV） excited Na3 Y9O3 （BO3）8：Tb^3＋ （NYOB：Tb^3＋） green phosphor is prepared. Strong VUV photoluminescence and high quenching concentration of Tb^3＋ （20 wt%） are observed in NYOB： Tb^3＋ and the strong emission are correlated with the unique layer-type structure of NYOB. All the characteristic 4 f - 5d transitions of Tb^3＋ and the host absorption band in VUV region are identified in the excitation spectrum. Based on the results, the energy levels scheme of Tb^3＋ in NYOB：Tb^3＋ is first established. This newly developed NYOB：Tb^3＋ phosphor shows excellent optical properties when compared with the commercial Zn2SiO4：Mn^2＋ and would be a potential VUV-excited green phosphor.     

Theoretical study of stereodynamics for the O（3P） ＋ H2 → OH ＋ H reaction

This paper employs the quasi-classical trajectory calculations to study the influence of collision energy on the title reaction on the potential energy surface of the ground ³A' triplet state developed by Rogers et al. (J. Phys. Chem. A 2000 104 2308). It calculates the product angular distribution of P(θ_r), P(φ_r) and P(θ_r, φ_r) which reflects vector correlation. The distribution P(θ_r) shows that product rotational angular momentum vectors j' of the products are strongly aligned along the relative velocity direction k. The distribution of P(φ_r) implies a preference for left-handed product rotation in planes parallel to the scattering plane. Four different polarisation-dependent cross-sections are also presented in the centre-of-mass frame. Results indicate that OH is sensitively affected by collision energies of H₂.     

N^＋（N=Li,Na,K）对发光材料M3（M=Ca,Sr,Ba）Y2（BO3）4：Eu^3＋光谱的影响

采用高温固相反应方法在空气中制备了M3(M=Ca,Sr,Ba)Y2(BO3)4∶Eu3 红色发光材料,测量结果显示,材料的主发射峰均位于613 nm处,监测613 nm发射峰时,所得材料的激发光谱相同。研究了Li ,Na 和K 对M3(M=Ca,Sr,Ba)Y2(BO3)4∶Eu3 材料激发与发射光谱的影响,结果显示,加入Li ,Na 和K 后,M3(M=Ca,Sr,Ba)Y2(BO3)4∶Eu3 材料的激发与发射光谱的峰值位置并不发生变化,但材料的激发与发射光谱的峰值强度均得到了不同程度的增强。在Li ,Na 和K 掺入浓度相同的条件下,研究发现,与加入Na 和K 时相比,加入Li 时,M3(M=Ca,Sr,Ba)Y2(BO3)4∶Eu3 材料的激发与发射光谱的峰值增强效果最明显。进而研究了Sr3Y2(BO3)4∶Eu3 材料发射峰强度随Li 掺杂浓度的变化情况,结果表明,随着Li 掺杂浓度的增大,Sr3Y2(BO3)4∶Eu3 材料发射峰强度先增大后减小,在Li 浓度为5 mol%时到达峰值,约为未掺杂时的两倍。     

2＋1维SU（3）O^＋＋胶球质量

提出变形集团展开法研究２＋１维ＳＵ（３）格点规范场的胶球质量,这种方法采用相边空心图的线性组合作为试探波函数,并引入了Ｗｉｌｓｏｎ圈图的平均值。计算结果表明,变形集团展开的真空能量比普通集团展开法方法的真空能量低,０＾＋＋胶球质量ｍ／ｅ＾２的二阶和三阶结果在耦合常数β＝４．５－８．０区间,表现出较好的标度行为和良好的收敛性。     

Resonant Reaction in Rb-Cs Vapour Mixture Rb（5P1/2） ＋ Cs（6P3/2） → Cs（8S1/2）＋Rb（5S1/2）

We experimentally study energy-pooling collision in the Rb-Cs vapour mixture at low densities in a cell. Atoms are excited to Rb（5P1/2） and Cs（6P3/2） states using two single-mode diode lasers. To isolate the heteronuclear contribution in the fluorescence spectrum, a double-modulation technique is adopted. The excited-atom density and spatial distribution are mapped by monitoring the absorption of a counterpropagating single-mode diode laser beam, tuned to Rb（5P1/2 → 7S1/2） and Cs（6Pa/2 → 8S1/2） transitions, respectively, which could be translated parallel to the pump beams. The excited atom densities are combined with the measured fluorescence ratios to determine cross section for the energy-pooling process [i.e. Rb（5P1/2） ＋Cs （6P3/2） → Cs（8S1/2）＋Rb （5S1/2）]. The cross section is 3.79 × 10^-14 cm^2 ± 45%.     

YAlO3：（Nd^3＋,Lu^3＋）单晶的各向异性吸收光谱

在室温下测量了ＹＡｌＯ３：（Ｎｄ＾３＋，Ｌｕ＾３＋）单昌三个晶轴方向的吸收光谱。其吸收谱带强度明显呈各向异生。将Ｊｕｄｄ－Ｏｆｅｌｔ理论加以修正，并扩展应用于处理各晶轴方向的吸收光谱。     

A typical slow reaction H（2S） ＋ S2（X3∑g） → SH（X2П） ＋S（3P） ona new surface： Quantum dynamics calculations

Quantum dynamics calculations for the title reaction H(2S) + S2(X3-Σg) → SH(X2Π) + S(3P) are performed by using a globally accurate double many-body expansion potential energy surface [J. Phys. Chem. A 115 5274(2011)].The Chebyshev real wave packet propagation method is employed to obtain the dynamical information, such as reaction probability, initial state-specified integral cross section, and thermal rate constant. It is found not only that there is a reaction threshold near 0.7 eV in both reaction probabilities and integral cross section curves, but also that both the probability and cross section increase firstly and then decrease as the collision energy increases. The existence of the resonance structure in both the probability and cross section curves is ascribed to the deep potential well. The calculation of the rate constant reveals that the reaction occurring on the potential energy surface of the ground-state HS2is slow to take place.