Rydberg electron transfer to hydrogen iodide: Dissociative and nondissociative electron capture

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.465290· OSTI ID:6487070

Carman, Jr, H S; Klots, C E; Compton, R N ^[1]

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1. Chemical Physics Section, Health and Safety Research Division, Oak Ridge National Laboratory, P.O. Box 2008 Oak Ridge, Tennessee 37831-6125 (United States)

Rydberg electron transfer (RET) to jet-cooled hydrogen iodide (HI) molecules has been studied for alkali atoms excited to [ital ns] and [ital nd] Rydberg levels (9[lt][ital n][lt]40). I[sup [minus]] ions produced by dissociative electron capture are observed for all Rydberg levels studied, even though dissociative RET becomes endothermic for [ital n][lt]52. For [ital n][gt]23, rate constants for I[sup [minus]] formation are in good agreement with previous results for low energy free electron attachment. For lower values of [ital n], the RET results deviate from the free electron results due to electrostatic interactions between the nascent positive (Rydberg core) and negative ions. A simple calculation based upon the free electron model'' agrees quantitatively with the rate constant data for [ital n][gt]13. For Rydberg levels with [ital n][lt]13, long-lived HI[sup [minus]] (and DI[sup [minus]]) ions are observed which appear to be stable with respect to both dissociation and autodetachment. These observations indicate that a bound and stable anion state exists, correlating with the lowest H(D)+I[sup [minus]] limit, with a potential well which supports at least one vibrational level for both HI[sup [minus]] and DI[sup [minus]].

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6487070
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 99:3; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METALS
ANIONS
BOUND STATE
CHARGED PARTICLES
COOLING
COULOMB FIELD
DEUTERIUM COMPOUNDS
DISSOCIATION
ELECTRIC FIELDS
ELECTRON TRANSFER
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
HALOGEN COMPOUNDS
HYDRIODIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IODINE COMPOUNDS
IODINE IONS
IONS
JETS
METALS
PRODUCTION
RYDBERG STATES
STABILITY
VIBRATIONAL STATES