486
INDEX
‘
Helical method (cant)
Idiostatic connection, 398
'
__
exper., 38
Ignition method, 258
Helium:
Illumination:
—
—
from a particles, 261
—
denition of, 74
.
—-—
nucleus, 261
Impulse generator, 301
.
-—
purication of, 378
Inactive time, 430
Hertz, 67, 148
‘
Indicator, radioactive, 322
Hess: cosmic rays, 343
Indices, crystal, 208
Heterostaitic connection, 397
Inelastic collision:
—High frequency:
——
denition, 138
-—
e/m method, 26, 29
——
electrons in gases, 144
——
generator, 32, 302
Initial veloci ties:
‘
High voltage:
'
——
thermiohic, 116
——
accelerator tubes, 303
—.photoelectric, 76, 80, 97
—
.
——
belt generators, 299
Insulators:
——_ cascade transformers, 302
-—
cleaning, 393
——
for electron >,, 63
'
——
for high voltage, 447
—for'x-ray tubes, 195, 193
—
for ionization chambers, 411, 419
——
high—frequency machine, 302
Integral range curve, 264, 312
—
impulse geherators, 301
Intensity:
-
..
-
——
insulation problems, 445
—
by counter tubes, 422
——
measurement, 442
——
by electrometer, 398
-
,
——
production, 296—303
——
by electroscopes, 388
‘
——
rectier circuits, 297 (15)
—'— by expansion chambers, 433
“
——
rectier tubes, 299
—
by ionization chambers, 410, 418
——sparking potentials, 461 '
—
by saturation current, 158
.
——
Van de Graal? machine, 300
—
of cosmic rays, 346
Hoffmann: (414)
’
—
of light, 73
.
.»
=
""
electrometer, 405
_
——
VS. wave-length, 71
Holweck molecular pump, 356
"
——
of radioactive substances, 254
Homogeneous'x—rays, 214 (205, 218)
—
of x-rays, 196, 213
'
.
Hot spark, 177
.
’
’
'
—
relative for a, B, 7 rays, 278”
.
,
_
Hughes, 81 ’
'
_
'
Intercepting cross—section:
.
_
1
Hull: (421) '
,
.
—
see effective cross-section.
.,
‘
.
——
magnetron, 30
'
Internal:
.
ffz=’
and Williams, shot effect, 102
-
—
amplication, 423
…
and Duane, 90
-
‘
—Conversion, 278
.
‘Hÿdr9gen2' ‘ “: =“ "
:
=
——
energy, 315
378
'
'
International:
,
309“
—
atomic Weight, 231
,
,
';…
«*
.
srandard, 241:
“hevy232
Ion:
,'
'
f‘ff