Controlled formation of weakly bound atomic negative ions by electron transfer from state-selected Rydberg atoms

Autor:	M. Reicherts, T. E. Roth, Hartmut Hotop, Ilya I. Fabrikant, M.-W. Ruf, Charles Desfrançois, A. Gopalan
Rok vydání:	1997
Předmět:	Physics Electron transfer Yield (chemistry) Rydberg atom Principal quantum number General Physics and Astronomy Atomic physics Maxima Ground state Adiabatic process Ion
Zdroj:	Europhysics Letters (EPL). 40:129-134
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i1997-00434-8
Popis:	Using crossed atomic beams and mass spectrometric ion detection we have studied the formation of negative Ca ions in slow collisions between laser-excited state-selected Ne** (ns,J = 2) and Ne** (nd,J = 4) Rydberg atoms and ground state Ca atoms. The rate coefficients exhibit resonant behaviour with maxima at an effective principal quantum number n* of about 11.5 and an estimated peak value of about 10−8 cm3 s−1. Two different theoretical calculations, based on a curve-crossing model and on a modified adiabatic theory, respectively, yield n*-dependences of the rate coefficients in good agreement with the experimental results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::53f99a320c7596e551c5a05ce0d4b5db https://doi.org/10.1209/epl/i1997-00434-8 Zobrazit plný text záznamu