Page -1106
212
212
Pb(10.64 hr.)
2-6-1963
NaI: 3” dia. x 3”
1.18 g/cm2 Be
10 cm
Nai 82-212-1
212
Pb (10.64 hr.)
b decay
Bi x-rays
10
5
Pb Decay Chain
212
238
Bi (60.55 min.)
35.94% a decay
208
300
208
103
102
101
100
0
5
10
15
20
25
30
212
Tl (3.053 min.)
b decay
415
Counts/Channel
104
35
40
Channel Number
Table of Contents
64.06% b decay
Po (0.299 m sec.)
a decay
Pb (stable)
Page -2212
Pb (10.64 hr.) Decay Scheme
10.64 hr.
0.0
0+
212
82
Pb
-
Q- =574
100% decay
176.68
123.5
115.183
238.632 (1.0 ps)
238.632
(0-)
2(-)
12.3
300.087
82.5
415.272 (10 ps)
1(-)
415.2
5.17
115.183 (8 ps)
0.0
60.55 min.
1(-)
Based on 5/4/2000
NNDC/BNL Data
212
83
Bi
GAMMA-RAY ENERGIES AND INTENSITIES
Nuclide:
212Pb
Eγ (keV)
42.11
47.91
48.56
52.91
56.72
115.183
123.5
164.2
176.68
238.632
300.087
415.2
Half Life: 10.64(1)
σ Eγ
Q
R
σIγ
Iγ
Level
0.005
0.592
0.007
115.183
238.632
0.05
0.002
0.010
0.052
43.3
3.28
0.143
0.006
0.3
0.03
0.022
415.272
238.632
415.272
415.272
Eγ, σEγ, Iγ, σIγ, Levels from ENSDF Database as of May 4, 2000
Q These Iγ are per 100 Decays of 212Pb.
R Normalization factor is 0.433, and its uncertainty is taken to be 0.0
Table of Contents
hr.
β−
β−
β−
β−
β−
β−
β−
β−
β−
β−
β−
β−