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2000 (1)
1999 (1)
1Author    P. Kierzkowski, B. Pranszke, A. Kowalski, M. MenzingerRequires cookie*
 Title    Electronic Energy Partitioning in the Reactions of Metastable Mg*( 3 Pj) Atoms with F 2 , Cl 2 , Br 2 ,1 2 , IC1, IBr  
 Abstract    Chemiluminescent reactions of metastable Mg*(3 Pj) atoms with F 2 , Cl 2 , Br 2 , I 2 , IC1, IBr molecules were studied in a beam-gas experiment. For all homonuclear targets the MgX(A 2 FI -X 2 X +) emission was observed, but for IC1 and IBr reactants the Mgl(A-X) emission was absent and only MgCl(A-X) or MgBr(A-X) spectra were found. In addition, for the I 2 , IBr, IC1, Br 2 reactions, broad pseudocontinua extend from above 400 nm into the infrared. These pseudocontinua are ten-tatively attributed to the Mgl, MgBr (B' 2 Z + -X 2 Z +) transition. The total attenuation cross sections, chemiluminescence cross sections and quantum yields were measured. The quantum yields are all below 5%. The results are analyzed using information theory. The low yields for the Mg* + F 2 system are explained by a barrier in the entrance channel. For other reactions the low yields are most probably caused by predissociation of the MgX*(A 2 n) products. 
  Reference    Z. Naturforsch. 55a, 433—140 (2000); received November 26 1999 
  Published    2000 
  Keywords    Chemiluminescence, Energy Transfer, Atomic Collisions, Molecular Collisions, Luminescence 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0433.pdf 
 Identifier    ZNA-2000-55a-0433 
 Volume    55 
2Author    B. Pranszke, P. Kierzkowski, A. KowalskiRequires cookie*
 Title    A Search for Isotope Effects in Chemiluminescent Reactions of Metastable Ca*( 3 Pj, *D 2 ) Atoms with CH 3 I and CD 3 I Molecules  
 Abstract    Chemiluminescent reactions of calcium atoms in the metastable Pj and 'D, states with CH 3 I and CD 3 I were studied in a beam-gas arrangement. Calcium monoiodide spectra associated with transitions from the electronic A IT, B 2 Z + and C 2 n states to the X 2 L + ground state were recorded. Total collision and chemiluminescence cross sections were measured. It was found that isotopic substitution in the methyl group does not change the reaction cross sections and the chemiluminescence spectra. 
  Reference    Z. Naturforsch. 54a, 191—194 (1999); received February 2 1999 
  Published    1999 
  Keywords    Chemiluminescence, Energy Transfer, Atomic Collisions, Molecular Collisions, Isotopic Effect 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0191.pdf 
 Identifier    ZNA-1999-54a-0191 
 Volume    54