∧ BARYONS(S=-1,I=0)∧~0=uds

<正>~~     

∑BARYONS(S=-1,I=1)∑~+=uus,∑~0=uds,∑~-=dds

<正>~~     

≡BARYONS(S=-2,I=1/2)≡~0=uss,≡~-=dss

<正>~~     

关于选择定则“△L=0”的讨论

本文对多电子原子电偶极辐射跃迁的选择定则△Ｌ＝０进行了详细的讨论，从而明确给出△Ｌ＝０的跃迁是否禁戒的判别规则．     

TheC-metric withm = 0,e ≠ 0

TheC-metric with parametersm = 0,e 0 is transformed to Weyl form; the sources then appear as a spherical cap of chargee, and an uncharged semi-infinite line mass. Next, the Weyl metric is enlarged by a further transformation. The enlarged space-time has as its source two uniformly accelerated charged caps. In an appropriate approximation, the electromagnetic field components of this solution are identical to those of the Born solution of classical electrodynamics.     

BOTTOM BARYONS(B=-1)∧_b~0=udb,≡_b~0=usb,≡_b~-=dsb,Ω_b~-=ssb

<正>~~     

38≤Z≤42类钴离子n=3,△n=0跃迁的理论计算

用多组态自洽场方法,结合作提出的半经验拟合公式,首先对３８≤Ｚ≤４２类钴离子３ｐ＾６３ｄ＾９,３ｐ＾５３ｄ＾１０,３ｐ＾６３ｄ＾８４ｐ组态的能级进行计算,然后根据能级值算出相应的电偶极跃迁的谱线波长,并给出各谱线的ＨＦＲ振子强度。     

Ω BARYONS(S=-3,I=0)Ω~-=sss

<正>Ω~-I(J~P)=0(3/2~+)Status:****The unambiguous discovery in both production and decay was by BARNES 64.The quantum numbers follow from the assignment of the particle to the baryon decuplet.DEUTSCHMANN 78 and BAUBILLIER 78 rule out J=1/2 and find consistency with J=3/2.AUBERT.BE 06 finds from the decay angular distributions ofΞ_c~0→Ω~-K~+andΩ_(c~0)→Ω~-K~+that J=3/2;this depends on the spins of theΞ_c~0 andΩ_c~0 being J=1/2,their supposed values.We have omitted some results that have been superseded by later experiments.See our earlier editions.     

BOTTOM MESONS(B=±1)B~+=u,B~0=d,B~0=db,B~-=b,similarly for B~*'s

<正>B-particle organization Many measurements of 8 decays involve admixtures of B hadrons.Previously we arbitrarily included such admixtures in the B~±section,but because of their importance we have created two new sections:B~±/B~0 Admixture"for T(4S)results and"B~±/B~0/B_(s~0)/b-baryon Admixture"for results at higher energies.Most inclusive decay branching fractions and x_b at high energy are found in the Admixture sections.B~0-B~0mixing data are found in the 6°section,while B_(s~0)-B_(S~0)mixing data and B-B mixing data for a B~0/B_(s~0)admixture are found in the B_(s~0)section.CP-violation data are found in the B~±,S~0,and B~±B~0 Admixture sections.b-baryons are found near the end of the Baryon section.Recently,we also created a new section:"V_(cb)and     

关于矢势边值关系n.（△×A2—△×A1）=0的讨论

指出一些献所给出的关于ｎ．（△×Ａ２－△×Ａ２）＝０可以写为其它形式的论证是不妥的。     

Lifetime Measurements for Electric-Dipole △n=0 Transitions in the Beryllium-Like Sulfur

We have measured lifetimes of △n=0 allowed transitions in beryllium-like sulfur using beam foil spectroscopic techniques. The measured values, derived from analysis of arbitrarily normalized decay curves, are presented and compared with theoretical calculations and previous measurements. Accurate probabilities have been determined by the well-known relationship.     

i=0替代i≠0的误差分析

用透射光栅测定光波波长,一般在分光计上进行,常用的方法是使i=0,这时光栅方程 dsinθ=kλ k=±1,±2,… (1) 当入射光束与光栅面法线成i角时,根据相邻光束的光程差计算,光栅方程为 d(sini±sinθ)=kλ (2) k=±l,±2,…式中“+”号表示入射光束与衍射光束在法线的同侧,而“-”号表示入射光束和衍射光束在法线的异侧。通常实验是在调节好分光计后,把透射光栅置于平台上,使汞灯光源通过平行光管垂直照射到光栅上,转动望远镜到一侧衍射     

The characteristics of O＋HD （v = 0, j = 0） reaction dynamics

The analytical potential energy function of HDO is constructed at first using the many-body expansion method.The reaction dynamics of O+HD(v = 0,j = 0) in five product channels are all studied by quasi-classical trajectory(QCT) method.The results show that the long-lived complex compound HDO is the dominant product at low collision energy.With increasing collision energy,O+HD → OH+D and O+HD → OD+H exchange reactions will occur with remarkable characteristics,such as near threshold energies,different reaction probabilities,and different reaction cross sections,implying the isotopic effect between H and D.With further increasing collision energy(e.g.,up to 502.08 kJ/mol),O+HD → O+H+D will occur and induce the complete dissociation into single O,H,and D atoms.     

非晶态超导体的Tc,2△0／kBTc和声子谱参量

分析研究了非过渡金属非晶态超导体的超导参量 T_c、2△_0 和声子谱参量λ、<ω>、<ω~2>与霍耳系数 R_H 之间,以及 T_c 与声子谱参量ω_0 和<ω>/ω_c 之间的关系,发现,在 R_H=-3.5—-4.0×10~(-11)m~3/AS 范围内同时存在着上述超导和声子谱参量的最大值;具有高ω_0 的材料对获得高 T_c 非晶态超导体有利;非晶态超导体的 T_c 与点阵无序度(<ω>/ω_0)近似地成线性关系.在上述结果的基础上,分别提出了一个非晶态超导体的 T_c 公式T_c=Aλ<ω>~(1/2)/(<ω>/ω_0+(1+λ)/20)和一个2△_r/k_BT_c 公式2△_0/k_BT_c=4.95[1-T_c<ω>_(1/2)/A(1/λω_0+1/20<ω>+1/20<ω>)]按照所提出的公式,第一次指出了,非过渡金属非晶态超导体既可以是一个2△_0/k_BT_c 比BCS 理值大得多的典型的强耦合超导体,也可以是一个 2△_0/k_BT_c 比 BCS 理值还要小得多的甚弱耦合超导体.当然,也可以是一个 2△_0/k_BT_c 值与 BCS 理论基本一致的弱耦合超导体.解释了结晶态弱耦合超导体的2△_0/k_BT_c 测量值偏离于 BCS 理论的原.     

氨分子在0_0~0和2_0~1带的选择光离解

本文利用脉冲紫外激光(UV)选择激发氨分子到A~1A″_2电子激发态的两个最低振动能级υ′_2=0和υ′_2=1(ν_2振动),然后检测新生态H原子的飞行谱(TOF),研究了氨分子的光碎片动力学。光谱证实了最近所测的离解能D_0~0(H-NH_2)=4.645eV;绝大多数生成的NH_2(X~2B_1)基处于非振动激发,但是具有围绕a惯性轴的高度转动激发。通过NH_3(A)的υ′_2=1光离解产生的NH_2(X)基具有较高的内部激发,并且显示了在N=K_a转动能级上的反转布居。     

LIGHT UNFLAVORED MESONS(S=C=B=0)For I=1(π,b,ρ,a):ud,(uu-dd)/2~(1/2),du;for I=0(η,η',h,h',ω,Φ,f,f'):c_1(u+dd)+c_2(s)

<正>π~±IG(JP)=l-(O-)We have omitted some results that have been superseded by later experiments.The omitted results may be found in our 1988 edition Physics Letters B204 1(1988).π~±MASS The most accurate charged pion mass measurements are based upon xray wavelength measurements for transitions inπ~-mesonic atoms.The observed line is the blend of three components,corresponding to different K-shell occupancies.JECKELMANN 94 revisits the occupancy question,with the conclusion that two sets of occupancy ratios,resulting in two different pion masses(Solutions A and B),are equally probable.We choose the higher Solution B since only this solution is consistent with a positive mass-squared for the muon neutrino,given the precise muon momentum measurements now available(DAUM 91,ASSAMAGAN 94,and ASSAMAGAN 96)for the decay of pions at rest.Earlier mass determinations with pi-mesonic atoms may have used incorrect K-shell screening corrections.Measurements with an error of0.005 MeV have been omitted from this Listing.     

0.5 eV时H++D2(v=0,j=0) 反应的微分、积分截面

基于ab initio势能面(KBNN PES)[1],用耦合通道超球坐标理论研究了碰撞能等于0.5 eV时H D2(v=0,j=0)的积分,微分截面.对于反应性碰撞,计算的积分截面表明由于深势阱的存在使得这一绝热反应产物的分布表现出一种近似的统计行为.计算的微分截面反映该体系存在着长寿命的中间络合物;对于非反应性碰撞(传能过程),平动—平动传能过程更有效,且其积分截面随着转动量子数的增大而显著减少.通过反应性碰撞和非反应性碰撞积分截面的比较,发现在低能碰撞情况,非反应性碰撞更容易进行.     

NxHy-Fe(x=0～2,y=0～3)配位簇的DFT计算

采用杂化密度泛函（ＤＦＴ）之Ｂ３ＬＹＰ／６－３１１Ｇ＊＊方法研究了ＮｘＨｙ－Ｆｅ（ｘ＝０～２,ｙ＝０～３）配位簇的几何结构和振动光谱,讨论了在纯铁催化剂上,氮分子和氢分子逐步合成氨的反应机理,结果表明,合成氨过程可能经历Ｎ２和Ｎ２Ｈ２物种,在优化结构的基础上,计算了各个模型的振动频率并解释了有关实验结果。     

The effect of collision energy on the stereodynamics of the reaction H(~2S)+NH(X~3∑~-,v = 0,j = 0)→ N(~4S)+H_2

The quasi-classical trajectory(QCT) is calculated to study the stereodynamics properties of the title reaction H(2S)+NH(X3∑-) →N(4S)+H2 on the ground state 4A' potential energy surface(PES) constructed by Zhai and Han [2011 J.Chem.Phys.135 104314].The calculated QCT reaction probabilities and cross sections are in good agreement with the previous theoretical results.The effects of the collision energy on the k-k' distribution and the product polarization of H2 are studied in detail.It is found that the scattering direction of the product is strongly dependent on the collision energy.With the increase in the collision energy,the scattering directions of the products change from backward scattering to forward scattering.The distribution of P(θr) is strongly dependent on the collision energy below the lower collision energy(about 11.53 kcal/mol).In addition,the P(φr) distribution dramatically changes as the collision energy increases.The calculated QCT results indicate that the collision energy plays an important role in determining the stereodynamics of the title reaction.     

T=+0及T=-0状态的涨落特性

本文指出，当 Ｔ→±０时，热力学量的涨落并非都趋于零．特别象温度、能量和熵这样一些重要热力学量的相对涨落，随着Ｔ→±０而迅速地增大．它是由于体系能级的分立性所造成的．这表明了在足够低或足够高的温度下，唯象热力学将失去意义．这个结论具有原则性的意义，尽管目前低温或负温技术还远不能达到这样的温度领域．此外，Ｔ＝±０状态还可能存在非热运动所引起的涨落，如量子力学的描述本身所固有的不确定性等现象．