共查询到20条相似文献,搜索用时 515 毫秒
1.
《Journal of Molecular Spectroscopy》1986,119(1):126-136
Conventional high-resolution photographic spectroscopy has been employed to study the B2Σ-X2Σ emission system of zinc deuteride in the region 280–370 nm. The B-X system of ZnD is reported for the first time and 17 such bands have been rotationally analyzed. Many local rotational perturbations have been found in the B state and are attributable to interactions with the A2Π state. The rotational and vibrational data for ZnH (after Stenvinkel) and ZnD are complementary and enable the RKR curve for the B state to be mapped with reasonable accuracy for almost 10 000 cm−1. B-X Franck-Condon factors for ZnH and ZnD are also reported. 相似文献
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Jacek Szczepkowski Patryk Jasik Anna Grochola Włodzimierz Jastrzȩbski Józef E. Sienkiewicz Paweł Kowalczyk 《The European physical journal. Special topics》2013,222(9):2329-2333
The 41Σ+ state of LiCs molecule is observed experimentally for the first time. The inverted perturbation approach (IPA) method is used to derive the potential energy curve of the state from the measured spectra. The experiment is accompanied by theoretical calculations of adiabatic potentials for excited states in LiCs including 41Σ+, performed with the MOLPRO program package. The irregular shape of the 41Σ+ state potential predicted by theory is confirmed in the experiment. 相似文献
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DANIEL A. STEINHURST JEAN-LUC LE GARREC MICHAEL M. AHERN MARK A. SMITH 《Molecular physics》2013,111(14):1193-1198
The vibrational relaxation of the A 2Σ state of OD has been studied in the low translational temperature environment of an argon free-jet (Ttrans near 5 K). Using laser induced fluorescence (LIF), the absolute vibrational relaxation rate coefficients were measured for OD A2Σ (ν′) to be 7.1 ± 2.6 × 10?11, 5.9 ± 1.4 × 10?11, and 2.7 ± 1.1 × 10?11 cm3 s?1 for the ν = 3, 2 and 1 states, respectively. State-to-state relaxation rate coefficients were also obtained for the ν= 1, ? = 1 level going to ν= 0, ? levels in the A2Σ manifold. The rotational relaxation rate coefficient for ν= 1, ?= 1 in the A state of OD was found to be 9.6 ± 1.0 × 10?11cm3s?1. These values are consistent with values measured for OH A2Σ, and the total loss rates are near the capture rate coefficient value. The vibrational relaxation rate coefficients kν appear to be governed by the vibrational energy of the molecule rather then by interaction with nearby dissociative states such as the a4Σ state. The relative Einstein A factors for the A2σ (ν = 3) state of OD were determined and compared with the available calculated value. 相似文献
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《Journal of Molecular Spectroscopy》1987,122(1):103-112
The A2Πr-X2Σ+ visible spectrum of gas-phase yttrium monoxide has been studied at sub-Doppler resolution to obtain information on the spin-rotation and 89Y nuclear magnetic hyperfine interactions. The observations were fitted to an effective Hamiltonian model that neglected the nuclear magnetic hyperfine interactions in the excited electronic state. An interpretation of the determined parameters in terms of possible electronic configurations is presented. 相似文献
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《Journal of Molecular Spectroscopy》1987,125(1):159-166
Adiabatic corrections have been calculated for a wide range of internuclear distances for the lowest bound triplet state of molecular hydrogen. It is shown that the existing small discrepancy between theoretical and experimental D0 values can be removed if an additional correction to the Born-Oppenheimer energy on the order of 0.4 cm−1 is taken into account. 相似文献
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Coherent vacuum ultraviolet (VUV) radiation was generated by four-wave difference frequency mixing (VUV=21–2) of pulsed dye laser radiation in carbon monoxide (CO). The frequency 1 was tuned to the C
1+(=0)X
1+(=0) two-photon transition, while the dye laser frequency 2 was scaned around 17650 cm–1 which corresponds to the A
1(=7)«C
1+(=0) transition energy. The VUV intensity was found to be strongly wavelength dependent. The analysis of the spectrum revealed (i) that the VUV intensity was enhanced by the rotational levels of the A
1(=7) state and (ii) that the off-resonance excitation in the C
1+(=0)X
1+(=0) two-photon transition greatly contributed to the present four-wave mixing process. The effects of pumping laser detuning, saturation and foreign gases are briefly discussed. 相似文献
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The laser-induced fluorescence excitation spectrum of the A2Σ-X2Π3/2 transition of CuO in the 540-620nm region has been studied, where the CuO molecule was produced by using the technique of dc discharge reaction under a supersonic condition. We have recorded and rotationally analysed the 0-0, 1-0, 2-0 and 3-0 bands. The rotational constants of the upper state A2Σ- were determined and vibrational constants improved. In addition, the lifetime measurement for the A2Σ- state was carried out under the collision-free condition, and the lifetimes obtained are 469±2, 456±2, 488±3 and 490±4ns for v'=0, v'=1, v'=2 and v'=3 levels, respectively. 相似文献
11.
B. T. Baisova S. L. Dolganeva V. I. Strunin N. N. Strunina I. A. Tikhomirov 《Technical Physics》2001,46(5):529-531
Results on determining the population of the A 3Σu electronic state of N2 molecules in a gas discharge using a relatively simple spectroscopic technique are reported. The technique proposed can be used not only in pure N2, but also in nitrogen-containing gas mixtures. The populations of the metastable and nonequilibrium B 3Πg states of nitrogen molecules are determined. It is shown that the electron-impact excitation is a dominant mechanism for populating the B 3Πg state. 相似文献
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Study on wave packet dynamics of E~1Σ_g~+ state of Li_2 with femtosecond-resolved photoelectron spectra
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Wave packet dynamics of the Li2 molecule are investigated
by using the time-dependent quantum wave packet method, and the
time-resolved photoelectron spectra of the Li2 molecule are
calculated. The time-resolved wave packet theory is used to
reasonably interpret the phenomena of the photoelectron spectra for
different parameters. Our calculation shows that the loss of the
wave packets in the shelf state area of E{ }^1\Sigmag^ +
plays a prominent role in the process of photoionization with the
increase of the delay time. Moreover, the oscillation of the wave
packet on the E{ }^1\Sigmag^ + curve symbolizes a
decreasing process of energy. 相似文献
13.
Quantum state sharing of an arbitrary qudit state by using nonmaximally generalized GHZ state
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We present a scheme for quantum state sharing of an arbitrary qudit state by using nonmaximally entangled generalized Greenberger-Horne-Zeilinger (GHZ) states as the quantum channel and generalized Bell-basis states as the joint measurement basis. We show that the probability of successful sharing an unknown qudit state depends on the joint measurements chosen by Alice. We also give an expression for the maximally probability of this scheme. 相似文献
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The coupledΛΛnn-Ξ-pnn system was studied to investigate whether the inclusion of channel coupling is able to bind theΛΛnn system.We use a separable potential three-body model of the coupledΛΛnn-Ξ-pnn system and a variational four-body calculation with realistic interactions.Our results exclude the possibility of aΛΛnn bound state by a large margin.Instead,we found aΞ-t quasibound state above theΛΛnn threshold. 相似文献
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本文应用 Gaussian03 程序包中提供的完全活性空间自洽场 (CASSCF) 方法, 采用标准基组 6-311++G(3d,2p) 对 BH 分子Χ1Σ+ 和 B1Σ+ 态势能曲线进行了单点能计算. 在此基础上, 利用相关理论将计算结果拟合到 Murrell-Sorbie 函数得到了与各电子态相对应的光谱常数和力常数, 并将计算结果与实验和其他理论结果进行了比较. 同时, 我们还利用光谱常数与力常数以及 Murrell-Sorbie 函数之间的关系计算了与实验光谱数据相对应的力常数和 Murrell-Sorbie 函数, 并与 CASSCF 结果进行了比较得出了一些有价值的结论. 最后, 对于具有双极小值的B1Σ+ 态给出了更精确的定量的信息. 相似文献