12—7.
PRIMARY BETA RAY SPECTRA
”275
,
_
by the primary or gamma rays from S
.
The beta rays With least
veloc1ty are bent the most, reaching the plate near the slit and '
vice versa.
A fogging of the plate is observed which extends
away
from the slit for a denite distance and then ceasès at a,
C
C
C
C
C
'
-
C
&
\
\\
.
B /
‘
P
/
S
_
..
'
_
FIG. 12—12.
Beta ray spectrograph.
_
point characteristic of the emitting materiah This background
'
of unequal intensity along the plate. In addition to this primary -
spectrum, several sharp lines are observed on the plate at positions
_
Which are also characteristic of the emitting substance. The
latter
form the so-called line spectrum.
_
_
_
_
_
_.
"
,
The momentum
of a beta particle, or
proportional to the momèntum,may be determined from‘the—
"
position of the blackenihg on
bhè,tograÿhic°plaœ. It‘f’ma'y
»
-
r' = «/1
-
*
g'
—
1
'
D
—,
,
'
PRIMARY BETA RAY SPECTRA
”275
,
_
by the primary or gamma rays from S
.
The beta rays With least
veloc1ty are bent the most, reaching the plate near the slit and '
vice versa.
A fogging of the plate is observed which extends
away
from the slit for a denite distance and then ceasès at a,
C
C
C
C
C
'
-
C
&
\
\\
.
B /
‘
P
/
S
_
..
'
_
FIG. 12—12.
Beta ray spectrograph.
_
point characteristic of the emitting materiah This background
'
of unequal intensity along the plate. In addition to this primary -
spectrum, several sharp lines are observed on the plate at positions
_
Which are also characteristic of the emitting substance. The
latter
form the so-called line spectrum.
_
_
_
_
_
_.
"
,
The momentum
of a beta particle, or
proportional to the momèntum,may be determined from‘the—
"
position of the blackenihg on
bhè,tograÿhic°plaœ. It‘f’ma'y
»
-
r' = «/1
-
*
g'
—
1
'
D
—,
,
'