Analysis of autoionizing Rydberg states in the vacuum ultraviolet absorption spectrum of HCl and DCl

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“…However, Lefebvre-Brion et a1 (1988) from their ab initio multichannel quantum defect calculation show that P( 1) does correspond to a d T 'II state. However, to obtain better agreement between their calculated and experimental photoionisation and photoabsorption spectra they lowered the value of the quantum defect from an ab initio value of 0.29 to 0.205 which agrees with the value Terwilliger and Smith (1975) obtained for this series. From thz data in figure 2 a quantum defect of 0.21 (n" = 2.79) is obtained for P(1).…”

“…Ten vibrational progressions have been identified and are labelled P( 1) to P( 10). Their interpretation is, for the most part, in general agreement with the optical work of Terwilliger and Smith (1975). From plausibility arguments Terwilliger and Smith assign the vibrational progression P(2) to a partially resolved p complex with configuration ( 3 ~~) ~( 3 p a ) ( 3 p ~) ~3 p ( u , T ) with a quantum defect of 0.69 (n* =2.31).…”

“…Previous measurements concerning transitions in this region of the spectrum that are relevant to this work include photoionisation (Lefebvre-Brion et a1 1988), photoabsorption (Terwilliger andSmith 1973, 1975) and photoemission spectra (Mohlmann etal 1977, White e t a l 1987, Rodriguez and Campos 1987. Electron impact studies of HCl have been reported by Shaw et a1 (1984), Wang et a1 (1984), York and Comer (1984) and Nasrallah and Marmet (1985).…”

“…The ground state of HCl+ is formed by removing an electron from the 3p7r orbital producing ionic states of symmetry 2111,2 and 2113,2, having adiabatic ionisation poten- 1985), photoionisation mass spectroscopy (Nicholson 1965) and photoabsorption (Terwilliger andSmith 1973, 1975). The excitation functions are seen to contain a large number of transitions whose energies and assignments are given in table 2.…”

Autoionization and neutral dissociation of superexcited HI studied by two-dimensional photoelectron spectroscopy

“…As for HCl and HBr, series of Rydberg states converging to the ionic à 2 ⌺ 1/2 ϩ states appear as extensive vibrational progressions on photoabsorption, photoionization, and fluorescence cross sections. [1][2][3][4][5][6][7][8][9] These cross sections for the vibrational levels show evidence of competition in decay of the Rydberg states between autoionization and predissociation. Characters of the involving states and branching ratios have been well accounted for by theoretical calculations.…”