Ions, electrons, and ionizing radiations / by James Arnold Crowther.

  • James Arnold Crowther
Date:
1919
Catalogue details

Licence: Public Domain Mark

Credit: Ions, electrons, and ionizing radiations / by James Arnold Crowther. Source: Wellcome Collection.

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    e, determination of, by Millikan, 43 by Thomson, 41 by Wilson, 42 » value of, 51 e/m, for a-rays, 180 » for B-rays, 196, 200 », for cathode rays, 92, 95 », from Zeeman effect, 263 », table of values of, 96 », variation of, with velocity, 198, 200 Electrical conductivity, relation of, to thermal conductivity, 267 Electromagnetic mass, 198 Electrometer, Dolezalek, 11 Electron, 1 7. charge on (see e) a electro-magnetic mass of, 198 Ss mass of, 2, 97 a motion of under magnetic field, 87 - radiation emitted by, 143 oh under magnetic and electric forces, 89 Pi variation of mass with speed, 198, 200 Electrons, arrangement of in atom, 256 $5 emitted by ultra-violet light, 126 es » by X-rays, 176 ¥ from hot bodies, 110 (see also Thermions) as number of in an atom, 151, 206, 254 An tracks of, 176 Electroscope, C. T. R. Wilson, 12 Emanation, radium, see Radium em- anation Equilibrium, radio-active, 220 Excited activity, 231 Farapbay, cylinder, 85 a dark space, 74, 78 sg tubes, 143 Flames, conductivity of, 120 a distribution of potential in, 121 FRIEDRICH and KNIPPING, 153 y-rays, 5 » absorption of, 207 » characteristic, 209 » nature of, 206 » production of, from f-rays, 208 » secondary, 207 wave length of, 210 Gaseous conduction, ionization theory of, 9; 17 Gaseous conduction, variation of cur- rent with po- tential difference, 15, 20 a with ionization by collision, 56 Gases, normal conductivity of, 7, 251 GEIGER, 193, 250 Geological age, 243 GOLDSTEIN, 83 Haga and WIinpt, 152 Hauuwacus, 126 Heating effect of radium, 246 Helium, production of, from a-rays, 18] “s content in uranium ores, 245 HuGuHEs, 128 Tonic mobilities, 19 Py calculation of, 28 - effect of pressure on, 30 ee in different gases, 27 is measurement of, by Rutherford, 23 . » by Langevin, 24 Tonium, 245 Ionization by collision, 53 jg » effect of sign of charge, 54 re » positive ions, 63 5 » Lownsend’s experi- ments, 57 ra variation of, with pressure and field, 60 ‘5 velocity required to pro- duce, 62 Ionization, by ultra-violet light, 127 by X-rays, 178 Ionization chamber, 14 Ionization currents, 8, 56 me measurement of, 10 - variation of, with potential, 15 5s with large voltages, Ionizing potential, 63 Ions, gaseous, 9 A condensation on, 36 oy mobility of, 19, 23-27 5 motion of, in a uniform field, 19 6 nature of, 29, 31 ‘ produced by collision, D3; 00, 60 < recombination of, 32 K series of X-radiations, 166, 169 Kanalstrahlen, see Positive rays KAUFMANN, 95, 196