Cyclotron Resonance in Gases. II. Cross Sections for Dipolar Gases and for CO2

摘要: The interaction of dipolar molecules with very low‐energy electrons arises almost entirely from the monopole—dipole interaction. These cross sections have been measured by analyzing widths and shapes cyclotron‐resonance absorption lines in a gaseous mixture N2 gases. electron collision σD for could be reasonably well fitted to relation = 180D2(v0/v)2, where is square angstroms, D dipole moment Debye units, v velocity, v0 velocity 298°K (1.16×107 cm/sec). A Born‐approximation calculation yields same result coefficient equal 130 rather than 180. CO2 has an anomolously large section nonpolar molecule. experimental data compatible that proportional v−1, but it can also D=0.67 which set zero v<5×106 cm/sec. This model corresponds physic...