共查询到20条相似文献,搜索用时 10 毫秒
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理论计算了钾双原子分子2^1∑^+u--X^1∑^+g跃迁所得到的扩散带荧光谱,并与Gondal等和Luh等以及Milosevic等的实验结果进行了比较,计算结果与Luh等和Milosevic等的实验结果符合很好,排除了600nm附近扩散带来自K22^1∑^+u-x^1∑^+g跃迁的可能性。 相似文献
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报道了用单光子激发产生K22^3Пg-x^3∑^+u跃迁扩散带的实验结果,讨论了此扩散带发射增益特性随温度和缓冲气体压力等条件的变化规律,实验测得了1.2%cm^-1的增益系数。 相似文献
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Optical heterodyne magnetic rotation enhanced velocity modulation spectroscopy was employed to observe the visible absorption spectra of the B^2Σ^+_u-X^2Σ^+_g electronic transition of C^-_2. Four hot bands (0,1), (1,2), (2,3) and (3,4) have been observed and the band (3,4) is measured directly for the first time, so far as we know, by absorption. A rotational analysis was carried out to obtain molecular constants. With the Franck-Condon principle and the vibrational Boltzmann distribution, we have estimated the vibrational temperature of C^-_2 to be about 3000K. 相似文献
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用三能级瞬态速率方程,建立了钾分子1ΛAg和23∏g态的碰撞能量转移的模型,实验上测量了不同温度的23∏g→α3∑辐射跃迁的荧光寿命,由此给出了1Λg和23∏g态的碰撞截面,理论与实验结果进行了比较。 相似文献
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制备出确定旋轨态的OCS+(X2∏)离子,在260~325 nm波长范围内研究了OCS+经由B2∑+←X2∏3/2(000)和B2∑+←X2∏1/2(000,001)跃迁的分质量光解离谱.由光解离谱得到OCS+(B2∑+)电子态的光谱常数υ1(CS stretch)=828.9(810.4) cm-1,υ2(bend)=491.3 cm-1和υ3(CO stretch)=1887.2 cm-1.在B2∑+←X2∏跃迁谱中只能观察到B2∑+(010)←X2∏1/2(000)跃迁的谱峰, 而观察不到B2∑+←X2∏3/2(000)跃迁的谱峰. 用X2∏电子态的(000)2∏1/2和(010)2∑+1/2电子振动能级之间的K耦合解释了这种B2∑+的υ2弯曲振动模的激发对X2∏电子态的旋轨分裂分量(Ω=1/2,3/2)的相关性 相似文献
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用脉冲直流放电产生Xe原子亚稳态5p56s[3/2]2和5p56s′[1/2]0.在单光子28000-42000cm-1能量范围内,结合飞行时间质谱技术获得Xe原子共振增强激发光谱.光谱分析表明,所有谱线来源于Xe原子5p56s[3/2]2和5p56s′[1/2]0两个亚稳态吸收单个光子向偶宇称np′、nf′自电离Rydberg态序列的跃迁.实验观测到许多新的自电离能级,并获得更精确和系统的能级位置和量子亏损值数据. 相似文献
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使用对称性匹配簇-组态相互作用方法首次计算了Li2分子自旋一致激发态a3Σ+u和b3Πu的离解能、平衡几何及其谐振频率。使用最小二乘法、利用Murrell-Sorbie函数形式拟合出了Li2分子三重态的第一激发态a3Σ+u 和第二激发态b3Πu的完整势能函数,并计算了这两个态的光谱常数 (Be, αe, ωe 和 ωeχe) 和力常数 (f2, f3和f4)。得到了Murrell-Sorbie函数形式既适用于基态、又适用于激发态的结论。将计算得到的激发态(a3Σ+u和b3Πu)的离解能、平衡几何及其谐振频率与实验结果及其它理论计算结果进行了比较。从比较的结果中可以清楚地看出,本文的计算结果在计算精度方面有很大的改进。 相似文献
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A combined cavity ringdown (CRD) and laser induced fluorescence (LIF) spectroscopic study on the A1∑+-X1∑+ transition of CuH has been presented.The CuH molecule,as well as its deuterated isotopologue CuD,are produced in a supersonic jet expansion by discharging H2(or D2) and Ar gas mixtures using two copper needles.Different profiles of relative line intensities are observed between the measured LIF and CRD spectra,providing an experimental evidence for the predissociation behavior in the A1∑+ state of CuH.The lifetimes of individual upper rotational levels are measured by LIF,in which the J''-dependent predissociation rates are obtained.Based on the previous theoretical calculations,a predissociation mechanism is concluded due to the strong spin-orbit coupling between the A1∑+ state and the lowest-lying triplet 3∑+ state,and a tunneling effect may also be involved in the predissociation.Similar experiments are also performed for CuD,showing that the A1∑+ state of CuD does not undergo a predissociation process. 相似文献
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采用原子分子静力学的基本原理分析了BrF基态X1∑+的离解极限,采用Herzberg同位素理论分析了BrF基态X1∑+光谱数据的同位素效应,并以此为基础,分析了光谱数据的同住素效应对振动能级和分子势能函数(Murrell-Sorbie势即MS势)的影响.结果表明,79BrF和81BrF基态X1∑+的光谱数据的同住素效应是一种弱效应,与Herzberg同住素理论符合得很好,低振动能态的能级对理论预计的偏离很小,高阶力常数f4和高阶展开系数a3与实验结果有较大偏差,但由于a3本身比a1和a2小很多,结果对势能函数整体影响不大. 相似文献
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