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

  • Crowther, James Arnold, 1883-1950.
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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    vill 19. 20. ak, 22. 23. 24. 25. 26. ai. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42, 43. CONTENTS CHAPTER IV THE CHARGE ON AN ION Condensation of water drops on ions C. T. R. Wilson’s cloud experiments C. T. R. Wilson’s later condensation experiments . Application to the determination of e. Thomson’s mietnel Balancing method : Millikan’s experimental determination of € ; Perrin’s determination of e from the Brownian movement Summary of results CHAPTER V IONIZATION BY COLLISION—THE SPARK DISCHARGE Ionization currents with large voltages : Difference in the effects produced by positive and cee ions Expression for the current through the gas when ionization by collision occurs Townsend’s experiments Variation of a with pressure and field Average velocity required to produce ionization Ionization by collisions with the positive ions . The spark discharge : Sparking potential for parallel pints decreases ‘ Paschen’s law ‘ : Variation of sparking potenti wi iomnpaiatate : The brush discharge The dark discharge CHAPTER VI THE PHENOMENA OF THE DISCHARGE TUBE Phenomena of the discharge in a gas at low pressure . ‘ Investigation of the intensity of the field in various parts of the discharge ‘ : : Number of ions in various ee of “ie aichanne ‘ The cathode fall of potential Theory of the discharge 36 37 4] 4] 43 46 50