0
50
100
150
200
250
Channel Number
Table of Contents
300
350
59
400
Np Kα2
Ge Escape Peak
Np Lβ1
107
86(237Np)
sum(Lγ1+59)
33
sum(Lβ1+59)
Np Lα2
Np Lα1
Np Lβ(2,15)
Np Lγ1
Np Lγ6
Np Ln
26
sum(Lα1+59)
69
104
43
105
{
103
31
10
Ge Escape Peaks (Lβ)
6
Ge Escape Peak (Lpγ1)
Np Ll
{
Counts/Channel
Page -1241
Am (432 yr.)
12-13-1999
HPGe: 50.5mm dia. X 20.5mm
none
20cm
A1121399001
102
101
100
450
500
Page -2109
241
Am (432 yr.)
source age: 23(2) yr. (ca)
7-6-1999 thru 7-14-1999
HPGe: 50.5mm dia. X 20.5mm
0.3 cm SS
20cm
S1070699001
low energy portion
59
102
191
bkg
175
383
376
332
368
370
500
1500
335
337
400
1400
312
(233Pa)
340/340(233Pa)
139
291
292
bkg
300/300(233Pa)
264/264
267
270
275
246
232
x10
bkg
bkg
221/221
103
322/322
208
102
150
104
sum(59 + 98)
sum(59 + 102)
164
165
169
146
bkg
105
125
123
86(237Np)
69
X-rays
197
Counts/Channel
106
Np Kα2
98
Np Kα1
107
Np Kβ3
Np Kβ1
sum (59 + 59)/Np Kβ2)
108
101
0
1000
100
1100
200
1200
300
1300
Channel Number
Table of Contents
600
1600
700
1700
800
1800
900
1900
1000
2000
Page -3104
241
Am (432 yr.)
source age: 23(2) yr. (ca)
7-6-1999 thru 7-14-1999
HPGe: 50.5mm dia. X 20.5mm
0.3 cm SS
20cm
S1070699001
high energy portion
662
ann. rad.
767
770
755
737
688
693
696/696
641
669
653
619
bkg
847/bkg
101
582/bkg
590/590
597
bkg
bkg
512/514
454/454
415/415(233Pa)
419
426
722/722
102
801
Counts/Channel
390
398/398(233Pa)
103
x10
100
2000
4000
2200
4200
2400
4400
2600
4600
2800
4800
3000
3200
5000
5200
Channel Number
Table of Contents
3400
5400
3600
5600
3800
5800
4000
6000
Page -4106
241
Lβ
8-21-1970
Si(Li) 30mm2 X 3mm
unknown absorber
1.75 cm
95-241-1
26
{
Counts/Channel
104
59
42/43
Ll
{
Np M
x-rays
32/33
Lα
105
In & Sn K x-rays from
fluorescence of detector contact
{
Lα
Am(432 yr.)
103
102
101
100
0
100
200
300
400
500
Channel Number
Table of Contents
600
700
800
900
1000
Page -5107
241
Am(432 yr.)
98
102
59
106
7-16-1970
Ge(Li) 2.5 cm2 x 8 mm
2
1 g/cm Poly + 1.32 g/cm2 Cd
1.5 cm
95-241-2
123
125
454
459
415
419
426
370
368 376
383
389/390
221
191
201
291/292
300
340
146
175
335
332
322
232
246
249
264
267
275
103
139
NP Kα2
NP Kα1
Am Kα1
NP Kβ3
NP Kβ2
NP Kβ1
662
722
786
755
767
770
709
737
688
680
x10
696
641
101
653
619
102
590
597
Counts/Channel
104
208
150
164
169
109
105
100
10-1
0
1500
100
1600
200
1700
300
1800
400
1900
500
2000
600
2100
700
800
900
2200
2300
2400
Channel Number
Table of Contents
1000
2500
1100
2600
1200
2700
1300
2800
1400
2900
1500
3000
Page -6241
241
225
Am (432.2 yr.)
a decay
237
Am Decay Chain
a decay
4.3x10-10% SF
221
Np (2.144 x 106 yr.)
a decay
233
Pa (26.967 day)
b- decay
233
U (1.592 x 105 yr.)
a decay
229
Th (7880 yr.)
Fr (4.9 min.)
>99.90% a decay
217
221
213
217
Bi (4.59 min.)
2.09% a decay
209
a decay
Rn (0.54 msec.)
97.91% b- decay
213
Tl (2.20 min.)
b- decay
209
Ra (14.9 day)
Po (4.2 msec.)
Pb(3.253 hr.)
209
Table of Contents
a decay
a decay
b- decay
Ac (10.0 day)
Ra (28 sec.)
0.012% b- decay
b- decay
225
<0.10% b- decay
At (32.3 msec.)
99.998% a decay
a decay
225
Ac (10.0 day)
Bi (stable)
Page -7241
Am (432.2 yr.) Decay Scheme
432.2 yr.
Part 1 of 4
0.0
5/2-
Q=5637.81
241
95
Am
100% decay
920.9
861.7
853.36
11/2(7/2+,9/2+)
805.8
9/2-
800.00
0.00004
78.1
770.57
7/2-
Based on 9/1/1999 NNDC/BNL Data
454.66
662.40
688.72
563.05
619.01
597.48
5/2+
722.01
696.60
680.10
653.02
722.01
737.34
767.00
729.72
772.4
828.5
806.26
921.5
5/27/2+
862.7
887.3
9/2+
860.7
7/2-
786.00
801.94
11/2+
770.57
9/2-
755.90
676.03
11/2-
573.94
3/2-
696.60
669.83
641.47
627.18
(7/2-)
446.43
529.17
5/2-
756.00
8.6x10-5
721.95
0.0007
324.42
0.0013
267.54
0.0005
225.96
0.015
158.51
1.6
130.00
0.01
102.96
13.0
75.92
<0.04
59.5412
84.5 (67 ns)
33.1964
0.22 4 ns)
0.0
237
93
Np
Table of Contents
2.144x106 yr.
0.34
Page -8241
Am (432.2 yr.) Decay Scheme
432.2 yr.
Part 2 of 4
5/2-
Q =5637.81
666.2
(9/2-)
646.1
11/2+
598.0
13/2+
592.3
(7/2-)
590.28
31.4
(5/2+,7/2-)
545.59
(3/2-)
514.19
17/2-
497.02
666.5
7/2+
135.3
0.0004
434.12
0.0004
395.52
0.0007
359.7
0.0006
324.42
0.0013
305.06
0.0024
281.35
0.0005
0.015
383.81
426.47
158.51
1.6
130.00
0.01
102.96
13.0
75.92
<0.04
59.5412
84.5 (67 ns)
33.1964
0.22 4 ns)
0.0
5/2+
Based on 9/1/1999 NNDC/BNL Data
161.54
246.73
232.81
454.66
487.3
514.0
5/2-
0.0004
267.54
512.5
632.93
9/2+
545.4
7/2-
459.69
452.53
191.46
522.06
11/2+
586.59
590.28
9/2-
0.0001
0.00014
225.96
590.28
13/2+
468.12
487.3
11/2-
Am
100% decay
485.96
459.68
406.35
3/2-
401.3
1/2-
463.22
13/2-
278.04
398.64
(7/2-)
322.52
(5/2-)
264.89
15/2-
191.96
(11/2-)
260.80
197.0
9/2+
154.27
7/2+
159.26
138.5
(9/2-)
139.44
(5/2-)
0.0
241
95
237
93
Np
Table of Contents
2.144x106 yr.
0.34
Page -9241
Am (432.2 yr.) Decay Scheme
432.2 yr.
Part 3 of 4
5/2-
Q =5637.81
9/2+
0.0
241
95
Am
452.53
100% decay
0.0004
444.78
0.0004
434.12
15/2-
395.52
0.0007
3/2+
370.93
0.0003
5/2+
368.59
0.0009
359.7
0.0006
1/2+
38.54
120.36
(5/2-)
109.70
(11/2-)
332.36
(7/2-)
129.2
324.42
316.8
Based on 9/1/1999 NNDC/BNL Data
56.8
51.01
Np
Table of Contents
79.1
249.00
146.55
175.07
165.81
332.35
291.30
264.89
292.77
300.13
309.1
237
93
316.8
5/2+
452.6
7/2+
370.94
5/2-
337.7
419.33
9/2+
368.65
335.37
7/2-
358.25
376.65
11/2+
0.0024
281.35
221.46
304.21
9/2-
305.06
204.06
260.80
322.52
13/2+
275.77
3/2-
64.83
1/2-
92.1
169.56
13/2-
11/2-
0.0013
267.54
0.0005
225.96
0.015
191.46
158.51
1.6
130.00
0.01
102.96
13.0
75.92
<0.04
59.5412
84.5 (67 ns)
33.1964
0.22 (4 ns)
0.0
2.144x106 yr.
0.34
Page -10241
Am (432.2 yr.) Decay Scheme
432.2 yr.
Part 4 of 4
5/2-
13.81
Q=5637.81
1/2-
281.35
0.0
241
95
Am
100% decay
267.54
0.0005
11/2-
225.96
0.015
13/2+
191.46
67.45
3/2-
5/2+
Based on 9/1/1999 NNDC/BNL Data
237
93
Np
Table of Contents
26.3448
33.196
42.73
75.8
102.98
267.58
221.80
7/2+
59.5412
54.0
27.03
43.423
61.46
55.56
69.76
234.33
5/2-
96.7
9/2+
98.97
7/2-
125.30
208.01
11/2+
115.54
164.69
150.04
123.01
9/2-
158.51
1.6
130.00
0.01
102.96
13.0
75.92
<0.04
59.5412
84.5 (67 ns)
33.1964
0.22 4 ns)
0.0
2.144x106 yr.
0.34
Page -11-
GAMMA-RAY ENERGIES AND INTENSITIES (page 1 of 3)
Nuclide: 241Am
Eγ (keV)
13.81
26.344 8
27.03
31.4
32.183
33.196
38.54
42.73
43.423
51.01
54.0
55.56
56.8
57.85
59.541 2
61.46
64.83
67.45
69.76
75.8
78.1
79.1
92.1
96.7
98.97
102.98
106.42
109.70
115.54
120.36
123.01
125.30
128.05
129.2
135.3
136.7
σ Eγ
0.02
0.000 2
Eγ, σEγ, Iγ, σIγ, Levels- from ENSDF Database as of September 1, 1999
Q
R
σ Iγ
Iγ
2.40
0.02
0.001
0.03
0.05
0.010
0.03
0.017 4
0.126
0.000 4
0.003
0.005 5
0.073
0.000 026
0.001 1
0.008
0.000 012
0.02
0.018 1
0.001 8
0.05
0.000 1
0.005 2
35.9
0.001 5
0.4
0.02
0.05
0.03
0.2
0.000 145
0.000 42
0.002 90
0.000 59
0.000 018
0.000 10
0.000 40
≈
0.2
0.02
0.02
0.05
0.07
0.020 3
0.019 5
0.000 015
0.000 004 9
0.08
0.02
0.02
0.000 004 5
0.001 00
0.004 08
241
0.000 4
0.000 4
0.000 03
0.000 09
Level
Eγ (keV)
α
α
α
α
α
33.196 4 α
370.93
α
75.92
α
102.96
α
332.36
α
130
α
158.51
α
324.42
α
α
59.541 2 α
191.46
α
332.36
α
225.96
α
102.96
α
75.92
α
800
α
305.06
α
359.7
α
130
α
158.51
α
102.96
α
α
434.12
α
191.46
α
444.78
α
225.96
α
158.51
α
α
434.12
α
459.69
α
α
138.5
139.44
146.55
150.04
154.27
156.4
159.26
161.54
164.69
165.81
169.56
175.07
190.40
191.96
197.0
201.70
204.06
208.01
221.46
221.80
232.81
234.33
246.73
249.00
260.80
260.80
264.89
264.89
267.58
270.63
275.77
278.04
291.30
292.77
300.13
304.21
281.35
59.541 2
102.96
545.59
σ Eγ
0.08
0.03
0.03
0.20
0.3
0.20
0.10
0.04
0.06
0.03
0.04
0.04
0.2
0.14
0.06
0.03
0.03
0.04
0.05
0.10
0.15
0.15
0.15
0.06
0.06
0.05
0.15
0.08
0.15
0.20
0.06
0.06
0.20
Half Life: 432.2(7) yr.
Q
Iγ
σ Iγ
0.000 005 3
0.000 461
0.000 074 0
0.000 000 54
0.000 001 1
0.000 011
0.000 002 1
0.000 001 4
0.000 001 5
0.000 066 7
0.000 023 2
0.000 173
0.000 018 2
0.000 002 2
0.000 021 6
0.000 000 49
0.000 000 8
0.000 002 90
0.000 791
0.000 042 4
0.000 000 5
0.000 002 4
0.000 001 1
0.000 004
0.000 001 0
0.000 000 5
0.000 001 0
0.000 000 19
0.000 017
0.000 001 0
0.000 004 64
0.000 000 66
0.000 002 42
0.000 000 54
0.000 000 30
0.000 000 27
0.000 000 25
0.000 001 21
0.000 000 19
0.000 009 0
0.000 000 4
0.000 026 3
0.000 000 64
0.000 006 6
0.000 000 44
0.000 003 1
0.000 014 2
0.000 000 8
0.000 000 20
0.000 000 4
0.000 001 01
0.000 000 21
Q These Iγ are per 100 Decays of Am.
R For total uncertainty add systematic component of 1% in quadrature, based on the normalization factor 1.00x10-5(1)
Table of Contents
R
0.000 000 3
0.000 000 5
Level
598
592.3
305.06
225.96
514.19
592.3
485.96
267.54
324.42
395.52
305.06
497.02
592.3
395.52
267.54
324.42
281.35
514.19
267.54
514.19
324.42
452.53
485.96
324.42
545.59
267.54
434.12
545.59
324.42
368.59
359.7
434.12
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
Page -12-
GAMMA-RAY ENERGIES AND INTENSITIES (page 2 of 3)
Nuclide: 241Am
Eγ (keV)
309.1
316.8
322.52
322.52
332.35
335.37
337.7
340.56
358.25
368.65
370.94
376.65
383.81
389.0
390.62
398.64
401.3
406.35
415.88
419.33
426.47
429.94
442.81
446.43
452.6
454.66
454.66
459.68
463.22
468.12
485.91
487.3
487.3
512.5
514.0
522.06
σ Eγ
0.3
0.2
0.03
0.03
0.03
0.03
0.2
0.08
0.20
0.03
0.03
0.03
0.03
0.3
0.10
0.15
3.0
0.15
0.10
0.04
0.04
0.10
0.07
0.15
0.2
0.08
0.08
0.10
0.20
0.15
0.20
0.3
0.3
0.3
0.5
0.15
Eγ, σEγ, Iγ, σIγ, Levels- from ENSDF Database as of September 1, 1999
Q
R
σ Iγ
Iγ
0.000 001 4
0.000 000 05
≤
0.000 151 8
0.000 003 2
0.000 149
0.000 496
0.000 004 29
0.000 004 3
0.000 001 20
0.000 217
0.000 052 3
0.000 138 3
0.000 028 2
0.000 000 49
0.000 005 90
0.000 002 0
0.000 000 49
0.000 001 45
0.000 003 1
0.000 028 7
0.000 024 6
0.000 001 15
0.000 003 5
0.000 000 49
0.000 002 40
0.000 003
0.000 010
0.000 000 23
368.59
316.8
452.53
590.28
332.36
368.59
370.93
0.000 000 24
0.000 005
0.000 001 2
0.000 003 0
0.000 000 7
434.12
368.59
370.93
452.53
459.69
0.000 000 27
0.000 000 22
0.000 000 8
0.000 000 7
0.000 000 23
0.000 000 3
0.000 000 25
0.000 009 7
0.000 000 4
0.000 003 63
0.000 001
0.000 002 88
0.000 001 0
0.000 000 27
0.000 000 21
0.000 000 3
0.000 000 44
0.000 001 15
0.000 002 58
0.000 000 95
0.000 000 23
0.000 000 27
0.000 000 29
Eγ (keV)
Level
666.2
592.3
598
452.53
459.69
770.57
452.53
721.95
514.19
459.69
592.3
598
590.28
646.1
545.59
514.19
598
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
529.17
545.4
563.05
573.94
582.6
586.59
590.28
590.28
597.48
619.01
627.18
632.93
641.47
653.02
662.40
666.5
669.83
676.03
680.10
688.72
693.62
696.60
696.60
709.45
722.01
722.01
729.72
731.5
737.34
742.9
755.90
759.38
763.9
767.00
770.57
772.4
σ Eγ
0.20
0.3
0.30
0.20
0.20
0.15
0.15
0.08
0.02
0.20
0.15
0.05
0.04
0.02
0.3
0.20
0.30
0.10
0.04
0.08
0.05
0.05
0.05
0.03
0.03
0.15
0.05
0.3
0.05
0.10
0.3
0.10
0.10
0.3
Half Life: 432.2(7) yr.
Q
Iγ
0.000 000 46
0.000 000 74
0.000 000 74
0.000 001 25
0.000 000 23
0.000 001 31
0.000 002 86
σ Iγ
0.000 000 19
0.000 000 12
0.000 000 20
0.000 000 21
0.000 007 41
0.000 059 4
0.000 000 56
0.000 001 26
0.000 007 1
0.000 037 7
0.000 364
0.000 000 49
0.000 000 38
0.000 000 64
0.000 003 13
0.000 032 5
0.000 003 68
0.000 000 33
0.000 000 6
0.000 000 17
0.000 000 19
0.000 000 3
0.000 001 1
0.000 008
0.000 005 34
0.000 000 20
0.000 006 41
0.000 000 18
0.000 196
0.000 004
0.000 001 33
0.000 000 47
0.000 008 00
0.000 000 35
0.000 007 60
0.000 001 67
0.000 000 20
0.000 005 00
0.000 004 74
0.000 002 66
0.000 000 14
0.000 000 15
0.000 000 24
Q These Iγ are per 100 Decays of 241Am.
R For total uncertainty add systematic component of 1% in quadrature, based on the normalization factor 1.00x10-5(1)
Table of Contents
R
0.000 000 12
0.000 000 13
0.000 000 17
0.000 000 8
0.000 000 17
0.000 000 28
0.000 000 09
0.000 000 06
0.000 000 18
0.000 000 21
0.000 000 15
Level
853.36
545.59
721.95
800
646.1
590.28
666.2
756
721.95
853.36
666.2
800
756
721.95
666.2
800
805.8
756
721.95
756
800
721.95
756
805.8
770.57
756
800
770.57
805.8
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
Page -13-
GAMMA-RAY ENERGIES AND INTENSITIES (page 3 of 3)
Nuclide: 241Am
Eγ (keV)
777.2
780.7
782.2
786.00
789.17
794.92
801.94
806.26
812.01
819.0
819.0
822.6
822.6
828.5
835.6
841.5
σ Eγ
0.2
0.5
0.15
0.25
0.20
0.20
0.30
0.30
1.0
1.0
1.0
1.0
Q
Iγ
0.000 000 061
0.000 000 25
0.000 000 15
0.000 000 62
0.000 000 39
0.000 000 94
0.000 001 36
0.000 000 31
0.000 000 61
0.000 000 40
0.000 000 40
0.000 000 22
0.000 000 22
0.000 000 24
0.000 000 21
0.000 000 04
Eγ, σEγ, Iγ, σIγ, Levels- from ENSDF Database as of September 1, 1999
R
σ Iγ
0.000 000 031
0.000 000 05
861.7
0.000 000 06
0.000 000 14
0.000 000 08
0.000 000 06
0.000 000 06
0.000 000 06
0.000 000 06
0.000 000 06
0.000 000 01
Eγ (keV)
Level
861.7
805.8
861.7
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α
847.4
851.6
854.7
860.7
862.7
870.7
887.3
898.4
902.5
912.4
921.5
928.8
945.7
955.7
1,014.7
σ Eγ
0.5
1.0
0.5
0.5
0.3
0.3
0.3
0.5
Half Life: 432.2(7) yr.
Q
Iγ
0.000 000 27
0.000 000 38
0.000 000 20
0.000 000 082
0.000 000 53
0.000 000 46
0.000 000 22
0.000 000 072
0.000 000 30
0.000 000 25
0.000 000 19
0.000 000 055
0.000 000 056
0.000 000 58
0.000 000 064
Q These Iγ are per 100 Decays of 241Am.
R For total uncertainty add systematic component of 1% in quadrature, based on the normalization factor 1.00x10-5(1)
Table of Contents
R
σ Iγ
0.000 000 03
0.000 000 06
0.000 000 04
0.000 000 025
0.000 000 06
0.000 000 05
0.000 000 029
0.000 000 05
0.000 000 05
0.000 000 04
0.000 000 028
0.000 000 028
0.000 000 06
0.000 000 010
Level
920.9
861.7
920.9
920.9
α
α
α
α
α
α
α
α
α
α
α
α
α
α
α