eprintid: 1826
rev_number: 7
eprint_status: archive
userid: 1
dir: disk0/00/00/18/26
datestamp: 2001-12-11 00:00:00
lastmod: 2001-12-12 00:00:00
status_changed: 2012-08-14 15:02:53
type: doctoralThesis
metadata_visibility: show
creators_name: Krohn, Sven
title: Inelastic collisions and recombination between electrons and molecular ions
title_de: Inelastische Kollisionen und Rekombination zwischen Elektronen und Molekülionen
ispublished: pub
subjects: 530
divisions: 851340
adv_faculty: af-13
keywords: Superelastische Kollisionensuper-elastic collisions , molecular ions , lithiumhydrid ion , dissociative recombination , heliumhydrid ion , molecular hydrogen ion
cterms_swd: Dissoziative Rekombination
cterms_swd: Molekülionen
cterms_swd: Lithiumhydridion
cterms_swd: Wasserstoffmolekülion
cterms_swd: Heliumhydridion
abstract_translated_text: Inelastic collisions between molecular ions and slow electrons play an important role in naturally occurring ionized media and involve interesting interaction mechanisms which are also under intense theoretical study.     Several experiments focused on the collision of small molecular ions with electrons were carried out at the heavy-ion storage ring TSR, located at the Max-Planck-Institut für Kernphysik, Heidelberg. Using the Coulomb explosion imaging technique it was possible to  monitor vibrational cooling of the stored homonuclear molecular  ions H_2^+ and D_2^+ it could be shown that the cooling is only due to the interaction of electrons with the molecular ions  in super-elastic collisions (SEC) where internal energy is transferred to the scattered electron. This process is closely related to dissociative recombination (DR).  For the DR and SEC of H_2^+ and D_2^+ ions with near-zero kinetic energy electrons absolute vibrational state specific rate coefficients were measured for the first time. Another series of experiments was focused on the investigation of final fragment states in the DR of LiH^+ and HeH^+.  The electronic structure of these ions and the corresponding neutral molecules is such that   DR proceeds via a non-adiabatic coupling of electronic and vibrational motion at short internuclear distances.  The experiments revealed a dominant population of the highest energetically accessible final fragment states in such reactions.  In addition, also the absolute rate coefficient for the DR of LiH^+ molecules with slow electrons was measured.   
abstract_translated_lang: eng
class_scheme: pacs
class_labels: 52.20.Hv, 34.80.Lx, 34.80.Gs, 98.80.Bp, 95.30.Dr
date: 2001
date_type: published
id_scheme: DOI
id_number: 10.11588/heidok.00001826
ppn_swb: 1643256890
own_urn: urn:nbn:de:bsz:16-opus-18262
date_accepted: 2001-11-14
advisor: HASH(0x564e1c45f9b0)
language: eng
bibsort: KROHNSVENINELASTICC2001
full_text_status: public
citation:   Krohn, Sven  (2001) Inelastic collisions and recombination between electrons and molecular ions.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/1826/1/diss.pdf