화학공학소재연구정보센터
Chemical Physics Letters, Vol.371, No.3-4, 231-237, 2003
Dissociative electron attachment to CHF2Cl
We present results of a crossed electron/molecule beams study concerning dissociative electron attachment (DEA) to CHF2Cl. This study was performed in the electron energy range from about 0-10 eV and at a gas temperature of 300 K. Four fragment negative ions (Cl-, F-, CCIF-and CF2-) were observed. The following partial absolute cross-sections for DEA to CHF2Cl were obtained, 2 x 10(-19) cm(2) at the 1.1 eV resonance for Cl-, 3 x 10(-20) cm(2) at the 3.4 eV resonance for F-,approximate to 2 x 10(-21) at the 3.0 eV resonance for CCIF- and 3 x 10(-21) at the 8.6 eV resonance for CF2-. Using the cross-section functions obtained, total rate coefficients for DEA to CHF2Cl were calculated giving a value of 9.0 x 10(-13) cm(3)s(-1) at room temperature. Present results are compared with previous data allowing thus to clarify existing discrepancies. (C) 2003 Elsevier Science B.V. All rights reserved.