‘‘
_
INDEX
Cosmic rays(Com‘.)
'
.
Cross-section (Conf.)
_
—
latitude effect, 350
——
see'eEective—cross—section.
-
'
—Llongitude effect, 350
'
Cross—section
of atoms:
'
'
,
.
—
nature of, 349
—
for electrons, 138
-'
_
-—
penetrating power,
344
_
—
for neutrons, 319, 335
.
_
'
——
positron discovery, 319
——
intercepting, 138
.
—*showers, 351
——
vs. velocity of neutrons, 336
‘
'
——
telescope, 349
Crystal:
Counter circuits:
——
diffraction of x-rays by, 205, 53 (13)
—
Geiger—Müller, 424
—
electron reection by, 51
_
-—
scale-of-eight, 422
_
,
——
grating space, 207, 13, 53
'
-—
scale—of—twO, 421
'
—
planes, 54
Counter-meter, 425
_
——
spectrometer, 205, 210
'
Countertube:
.
-'—— exper., 218
'
'
_'
-—
accidental counts, 428
Crystal structure, 103, 205
_
.
-
——
background count, 427
——
exper., 216
_
'
'
——
coincidence, 427, 348
——
indices, 208
’
-—
efciency, 430
Curie:
_
'
-—
for coSmic rays, 348
"
——
radioactive unit, 241
'
_
.
-
—‘Geiger, 424
'
-
'
Current:
_
_
,
-
-
— Geiger-Müllèr, 422
_
——
absolute, measurement, 403
.
-—
in gamma experiment, 290
'
detection of
.
'
_
_
,
——
ihactivetime,430'
'
'
‘
—
——
ionization, 158
.
_
-
_
'
7
‘
—_ma«nUfacture, 431
’
—
ndrnialdensity,l75 _'
*
'
_
_— plateau 0f,432
_
'
"
——
saturation, 158
'
_
-—.— potential gradients in, 448
_
—-—
to.a pr‘obe, 167, 171_ '
,
'
——_principle of,“422î ' î
—
a:;
,_
Cut-off:
_
*
_
__
,
_
_
'.
375
"_
.
…,
ÏŸ ' _ — sénéiti_iiitÿgÿ429i_:….f-?
'
-—'— of tube
—statlstlcaluctuanons 251
'“Wpes,423 » "«…
"'
,
"
1
*V°1tagecurve428
Ï
DCamp11er5,408
C°“nüngfate Dangerfromxrays,l99
—meter425
Drkspce
—absmPtlonhmït,202avxsson
“'Potenüalsl45—andCalbmkl32
_°XPefaï525154DeBrogheequatlon,49
_table460ebyeScherrer,57,210