共查询到20条相似文献,搜索用时 15 毫秒
1.
用分步激发方法及偏振光技术,测定了锶的(5p3/2ns)1(n=13-21)及(5p3/2 nd)3(n=13-24)各自电离谱,在低于5p1/2电离限的(5p3/2ns)1态的实电子激发谱中,出现对应于(5p1/2ns)1及(5p1/2nd)1的畸变峰,畸变峰也出现于(5p3/2nd)3的实电子激发谱中。这说明(5pjns)(5pjnd)自电离系列间存在相互作用。
关键词: 相似文献
2.
3.
We expect that BR(χ_(c2)(2P)→gluongluon) ≥2% if the Particle Data Group as well as the Ba Bar and Belle collaborations have correctly identified the state. In reality, this branching ratio corresponds to the one forχ_(c2)(2P) decaying into light hadrons. We also discuss the detection possibilities of these decays. 相似文献
4.
5.
6.
采用多参考组态相互作用的计算方法和很大的基组构造了Cl+H2反应体系的一组新的三维从头算势能面. 该势能面包含Cl+H2体系的能量最低的三个绝热态,并在非绝热近似下转化为四个非绝热势能面. 另外,旋轨耦合矩阵元也基于Breit-Pauli Hamil-tonian计算得到. 对角化这四个非绝热势能和两个旋轨耦合矩阵元组成的全耦合Hamiltonian,得到了三个考虑旋轨耦合后的绝热势能面.基于这组新势能面的非绝热动力学计算结果与最新的实验符合得很好,很好地解释了 相似文献
7.
采用三台可调谐激光实施孤立实激发,分三步将处于基态的Ba原子激发到6p1/2nd(J=1,3)和6p3/2nd(J=1,3)自电离态上,获得了分别从6snd1D2(n=7—15)和6snd3D2(n=7—12) 激发而得到的6p1/2nd(J=1,3)和6p3/2nd (J=1,3)自电离光谱,重点对主量子数n较低的自电离态进行了实验研究. 通过光谱的线形拟合得到了上述能级的位置和宽度等数据,进而获得了量子亏损和约化宽度等信息. 通过对不同系列的自电离光谱的分析和比较,详细讨论了这些自电离态的光谱特征及其复杂光谱结构的成因.
关键词:
孤立实激发
组态相互作用
自电离态 相似文献
8.
9.
Recently, we have discovered a new type of first order phase transition around 120 K for (n-C3H7)4N[FeIIFeIII(dto)3] (dto=C2O2S2), where the charge transfer transition between FeII and FeIII occurs reversibly. In order to elucidate the origin of this peculiar first order phase transition. Detailed information about the crystal structure is indispensable. We have synthesized the single crystal of (n-C3H7)4N[CoIIFeIII(dto)3] whose crystal structure is isomorphous to that of (n-C3H7)4N[FeIIFeIII(dto)3], and determined its detailed crystal structure. Crystal data: space group P63, a=b=10.044(2) Å, c=15.960(6) Å, α=β=90°, γ=120°, Z=2 (C18H28NS6O6FeCo). In this complex, we found a ferromagnetic transition at Tc=3.5 K. Moreover, on the basis of the crystal data of (n-C3H7)4N[CoIIFeIII(dto)3], we determined the crystal structure of (n-C3H7)4N[FeIIFeIII(dto)3] by simulation of powder X-ray diffraction results. 相似文献
10.
A.N. Shirsat 《Journal of Physics and Chemistry of Solids》2005,66(6):1122-1127
Thermochemistry in the decomposition of gadolinium di-oxycarbonate, Gd2O2CO3(s) and neodymium di-oxycarbonate, Nd2O2CO3(s) was studied over the temperature region of 774-952 K and 775-1105 K, respectively. The equilibrium properties of the decomposition reactions were obtained by tensimetric measurement of the CO2(g) pressure over the biphasic mixture of RE2O2CO3(s) and RE2O3(s) at different temperatures (RE=Gd, Nd) and also by thermogravimetric analysis of the decomposition temperature at different CO2 pressures. The temperature dependence of the equilibrium pressure of CO2 thus measured could be given by
- ln pCO2/Pa (±0.13)=−22599.1/T+35.21 (774≤T (K)≤952) for Gd2O2CO3 decomposition and
- ln pCO2/Pa (±0.19)=−23824.7/T+33.14 (775≤T (K)≤1105) for Nd2O2CO3 decomposition.
11.
MEASUREMENT OF HYPERFINE COUPLING CONSTANTS OF THE EXCITED STATES 4f7(8S07/2)6p3/2(7/2, 3/2) IN 151,153Eu+ 下载免费PDF全文
Hyperfine structure spectra of singly ionized europium have been measured by collinear fast-ion-beam laser spectroscopy. All the spectral lines were resolved and the magnetic dipole and electric quadrupole coupling constants of the metastable and excited levels were determined. 相似文献
12.
13.
The purpose of this paper is to investigate the interplay between the chemical shielding anisotropy and quadrupole interaction in MQMAS spectra.
in the compounds Na3Co(NO2)6 and trans-Co[(en2)(NO2)2]NO3 provides model systems for such an investigation. Furthermore, only few results have been reported on the application of the MQMAS method to a spin I=7/2. The possibilities of the MQMAS spectroscopy for determining the relative orientation of the two tensors and its advantage over previous techniques are discussed. Reported experimental spectra at different spinning speeds of Na3Co(NO2)6 are accurately reproduced by our theoretical simulations. The calculations are based on a recent approach, summarized in the present paper, which allows one to perform efficient simulations of MQMAS spectra including all interactions and their time-dependence throughout the experiment. This is necessary for calculating accurate MQMAS spectra including the spinning sideband pattern. In the case of trans-Co[(en2)(NO2)2]NO3 where the quadrupolar interaction and chemical shielding are stronger and their axes are non-coincident, the MQMAS spectrum is strongly distorted due to the unsufficient spinning speed and RF power. In this case, MAS at different spinning speeds is shown to provide valuable information. 相似文献
14.
We investigate the high resolution absorption spectroscopy of P2 radical, generated in ac glow discharge of PC13 buffered with helium, using optical heterodyne magnetic rotation enhanced concentration modulation spectroscopy in the visible region. The (1, 2), (1, 3) and (2, 3) bands of c^3Ⅱu- b^3Ⅱg in the range 16620-17860cm^-1 are observed and their 3II2 3II2 subbands are rotationally analysed. A set of effective molecular constants for the Ω= 2 component of the states involved are determined. 相似文献
15.
We present the magnetic and thermal properties of a series of compounds RE2Al3Si2 for RE=Dy, Ho, Er, and REAlSi for RE=Pr, Ce. The 2–3–2 family crystallizes with themonoclinic Y2Al3Si2-type structure while the 1–1–1 family crystallizes in the body-centered tetragonal α-ThSi2-type structure. The measurements were done on single crystals, grown using high-temperature flux technique and molten Al as a solvent . Susceptibility and heat capacity data were taken from 1.8 to 200 K, from the heat capacity data, the isothermal magnetic entropy change was obtained. Our results indicate signal oscillations in magnetocaloric properties for those compounds, in particular, Dy2Al3Si2 that shows an anomaly that can be associated with a spin reorientation. Similar results are known for some Dy discilicides and dialluminades. 相似文献
16.
类氖锗基态到n=3精细能级的碰撞激发强度 总被引:1,自引:1,他引:0
使用扭曲波方法计算了Ge ̄(22+)从基态到n=3精细能级的碰撞强度,考察了不同组态以及相对论修正对碰撞强度的影响,并与平面波,库仑波和其它扭曲波方法计算的结果进行了比较。 相似文献
17.
18.
A. Martínez-de la Cruz F.E. Longoria Rodríguez 《Journal of Physics and Chemistry of Solids》2008,69(4):830-834
Electrochemical lithium insertion into (PO2)4(WO3)2m, where m=9 and 10, has allowed the determination of several phases Lix(PO2)4(WO3)2m between 3.4 and 0.01 V vs Li+/Li0. After the first cycle the electrochemical system was unable to maintain the high specific capacity of the cells (540 Ah/kg) due to irreversible processes. Nevertheless at high voltage values, above 1.4 V vs Li+/Li0, the lithium insertion proceeded through a reversible mechanism. By means of X-ray diffraction experiments we have detected the nature of different phases Lix(PO2)4(WO3)2m formed and we have established a correlation with the reversible/irreversible processes detected during the electrochemical insertion. 相似文献
19.
Keishi Kanada Akira Oosawa Takao Suzuki Hirotaka Manaka 《Journal of Physics and Chemistry of Solids》2007,68(11):2191-2194
The ground state of the solid solution of the two spin gap systems (CH3)2CHNH3CuCl3 and (CH3)2CHNH3CuBr3 has been investigated by 1H NMR. The existence of a magnetic ordering in the sample with the Cl-content x=0.85 was clearly demonstrated by a drastic splitting in a resonance line at low temperatures below TN=13.5 K. The observed NMR spectra in the ordered state was qualitatively consistent with the simple antiferromagnetic state. 相似文献
20.
Optical absorption, thermoluminescence, infrared spectra and differential thermal analysis of three different tellurite glass systems viz., ZnF2-As2O3-TeO2, ZnF2-Bi2O3-TeO2 and ZnF2-P2O5-TeO2 containing 0.4% of Cr2O3, have been investigated. Results have been analysed in the light of different oxidation states of chromium ion and the most suitable host for lasing Cr3+ ions has been identified and reported. 相似文献