首页> 外文期刊>The Journal of Chemical Physics >TUNABLE VACUUM ULTRAVIOLET LASER SPECTROSCOPY OF XEAR AND XENE NEAR 68,000 CM(-1) - INTERATOMIC POTENTIALS MEDIATED BY A 6S RYDBERG ELECTRON
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TUNABLE VACUUM ULTRAVIOLET LASER SPECTROSCOPY OF XEAR AND XENE NEAR 68,000 CM(-1) - INTERATOMIC POTENTIALS MEDIATED BY A 6S RYDBERG ELECTRON

机译:68,000 CM(-1)附近的氙和氙的可调真空紫外激光光谱-6S RYDERBERG电子介导的原子间电位

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The laser induced fluorescence spectra of XeAr and XeNe have been measured near the Xe 6s[3/2](1) degrees - S-1(0) transition at 68 045.663 cm(-1). In XeAr, nine discrete peaks were observed, attributed to excitation to vibrational levels of the excited Omega=0(+) electronic state, merging into a continuum. From a Franck-Condon analysis, the potential for the excited Omega=0(+) state of XeAr was determined. It was found that this potential has a shallow minimum at long range [D-e' = 28(1) cm(-1), r(e)' = 5.44(7) Angstrom] with a shallow repulsive wall. The shallow repulsive wall is attributed to the influence of the XeAr+ ion core at short range. The role of the 6s Rydberg electron of Xe in determining the shape of the interatomic potentials of excited XeRg (Rg = a ran gas atom) is discussed on the basis of a simple model potential, in which the interatomic potential is described as the sum of a diatomic ion core (XeRg(+)) potential term and a term representing the exchange repulsion between the Rydberg electron and the rare gas moiety. For XeNe, only continuum spectra were observed, indicating that the upper states are not bound. (C) 1996 American Institute of Physics. [References: 40]
机译:XeAr和XeNe的激光诱导荧光光谱已在68e.045.663 cm(-1)处的Xe 6s [3/2](1)度-S-1(0)跃迁附近进行了测量。在XeAr中,观察到9个离散峰,这归因于激发Omega = 0(+)电子态的振动能级,并合并成一个连续体。从弗兰克-康登分析,确定了XeAr的Omega = 0(+)激发态的势能。发现该电位在长距离[D-e'= 28(1)cm(-1),r(e)'= 5.44(7)埃)下具有浅的排斥壁,具有最小的最小值。浅排斥壁归因于XeAr +离子核在短距离内的影响。在简单模型势的基础上,讨论了Xe的6s Rydberg电子在确定激发的XeRg原子间势的形状(Rg =气体原子)中的作用,其中原子间势被描述为双原子离子核(XeRg(+))电势项和代表Rydberg电子与稀有气体部分之间交换排斥的项。对于XeNe,仅观察到连续光谱,表明较高的态未结合。 (C)1996年美国物理研究所。 [参考:40]

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