Integrated dipole oscillator strengths and dipole properties for Ne, Ar, Kr, Xe, HF, HCl, and HBr

Abstract

This paper is dedicated to Professor Camille Sandorb on the occasion of his 65fh birfhdayASHOK KUMAR and WILLIAM J. MEATH. Can. J. Chem. 63, 161 6 (1985). Dipole oscillator strength distributions have been constructed, and used to evaluate integrated dipole oscillator strengths and a variety of dipole oscillator strength properties, for ground state Ne, Ar, Kr, Xe, HF, HCI, and HBr. Each distribution has been constructed by using experimental and theoretical photoabsorption cross sections and by subjecting the resulting dipole oscillator strength data to constraints provided by the Thomas-Reiche-Kuhn sum rule and molar refractivity or related data for the relevant dilute gases. The resulting dipole properties are generally the most or only reliable values available for the hydrogen halides, for the rare gases they largely augment reliable results for most of the properties already available in the literature. The results for HCI are used to discuss an interesting molecular effect in the photoabsorption spectrum of this molecule betwen -200 eV and -205 eV.ASHOK KUMAR et WILLIAM J. MEATH. Can. J . Chem. 63, 1616Chem. 63, (1985. On a Ctabli les distributions des forces d'oscillateurs dipolaires et on les a utilisC pour Cvaluer, pour les Ctats fondamentaux de Ne, Ar, Kr, Xe, HF, HCI et HBr, les forces intCgrCes d'oscillateurs dipolaires ainsi qu'une variCtC de propriCtCs associies avec la force d'oscillateurs dipolaires. On a Ctabli chaque distribution en faisant appel aux valeurs expCrimentales et thCoriques des sections droites de photoabsorption et en soumettant les donnCes relatives aux forces d'oscillateurs dipolaires qui en rksultent aux contraintes qui sont fournies par la regle des sommes de Thomas-Reiche-Kuhn et aux rCfractivitCs molaires ou aux donnCes apparentCs pour les gaz diluCs appropriCs. Dans le cas des halogenures d'hydrogene, les propriCtCs dipolaires qui en rksultent sont gCnCralement les seules valeurs disponibles ou les plus fiables; pour les gaz rares, les risultats fiables sont grandement augmentCs pour la plupart des propriCtCs qui sont dCja disponibles dans la litterature. On a utilisC les rCsultats obtenus avec le HCI pour discuter d'un effet molCculaire intkressant dans le spectre de photoabsorption de cette molCcule entre environ 200 et 205 eV.[Traduit par le journal]

Low-energy positron interactions with krypton

“…close to its experimental value of 16.8 a.u. [30]. This potential modifies the dipole term of the positron-electron Coulomb potential and is given by the following expression:…”

Variational calculation of low-energy positron life time in Xe atoms

“…However small fraction of positrons can tunnel to inner electrons region and annihilate with some of them. The annihilation parameter Z e f f have calculated at each shell of the Xe-atom using equation (28). The contribution of them to the annihilation parameter Z e f f are shown in figure (3).…”

“…The experimental value for the dipole polarizability is α d = 27.61 [28], and the cut off parameter rc =1.63 [27].…”

Searching for many-body effects and Efimov states in very weakly bound triatomics: HeNeH−and HeNeH

“…(21), generating the dipole-dipole terms with the polarisability values of Ref. [26]. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 All the results reported by the various columns of 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 From the top panel, referring to the |k = 0 state, we see that the dipole-dipole interaction is mainly attractive for the collinear structures while it is less so (and can even be repulsive)…”