INDEX.
The numbers refer to the pages.
α rays
discovery of, 141
nature of, 141
magnetic deviation of, 142 et seq.
electrostatic deviation of, 146
velocity of, 148
value of e/m for, 148
charge carried by, 151 et seq.
number of α particles expelled from one gram of radium, 155
mass and energy of, 156
origin of, in atomic disintegration, 157
scintillations produced by, 158 et seq.
absorption of, by matter, 161 et seq.
increase of absorption with thickness of matter traversed, 163
relative absorption of α rays from radio-elements, 164
absorption of, by gases, 165 et seq.
connection between absorption and density, 169
relation between ionization and absorption, 170
theory of absorption of, 170 et seq.
range of ionization of, 172 et seq.
complexity of α rays from radium, 174 et seq.
effect of thickness of layer of radiating matter on emission of, 195
relative ionization produced by α and β rays, 196 et seq.
phosphorescence by α rays, 202 et seq.
connection of, with radio-active changes, 235, 444 et seq., 455
from the emanations, 263
emission of energy from radio-elements in form of α rays, 419 et seq.
connection of heat emission of radium with α rays, 421 et seq.
number of ions produced by an α particle, 433
absence of, in rayless changes, 454
emission from active products, 454 et seq.
loss of weight due to expulsion of, 473
α particles consist of helium, 479 et seq.
magnetic deflection of, from radium C, 543
velocity and e/m for, from radium C, 543 et seq.
diminution of velocity of, in passing through matter, 545
diminution in velocity of, in passing through aluminium, 545
velocity of, when ionization ceases, 545 et seq.
connection of phosphorescent, photographic, and ionization effects produced by, 546 et seq.
energy required to produce an ion by α rays, 551
Abraham
apparent mass of moving charged body, 71, 127
Absorption
law of, in gases, 64 et seq.
relative absorption of α, β and γ rays by matter, 111
connection between absorption and ionization, 134 et seq., 170 et seq.
of β rays by solids, 134 et seq.
connection between absorption and density for β rays, 137
of β rays in radio-active matter, 140
of α rays by solids, 161 et seq.
of α rays in gases, 167, 170 et seq.
connection between absorption and density for α rays, 169
theory of, 170 et seq.
of γ rays by solids, 179 et seq.
connection between absorption and density for γ rays, 181
of rays from the emanations, 263
of penetrating rays from the earth, 520, 540
Actinium
methods of separation of, 20 et seq.
properties of, 21
similarity to "emanating substance" of Giesel, 21
