| |
|
|---|
| Half life: | 34.4 h 3 | |
|---|
| E(level): | 254.29 5 keV |
|---|
| Jp: | 11/2- |
|---|
| Sn (keV): | 7480.7 4 |
|---|
| Sp (keV): | 7171 85 |
|---|
| Prod. mode: |
Fast neutron activation
Thermal neutron activation
|
|---|
| | |
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| ENSDF citation: | NDS 72,355 (1994) |
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| Literature cut-off date: | 1-Oct-1993 |
|---|
| Author(s): | J.K. Tuli |
|---|
| References since cut-off: |
137Ce decay from 1993-98 (NSR)
|
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| |
|---|
Decay properties:
|
|---|
| Mode | Branching (%) | Q-value (keV) |
|
|---|
| IT | 99.22 3 | |
|
| e+b+ | 0.78 3 | 1222.1 16 |
|
| |
|---|
Most Recent ENSDF Data (12/2002)
|
|---|
| Mode | Data set name | Display data |
|---|
|
|---|
| TORI Data (1999)
Gammas from 137mCe (34.4 h 3)
|
|---|
| Eg (keV) |
Ig (%) | Decay mode |
|---|
|
| 10.6 5 |
|
e+b+ |
| 54 |
|
e+b+ |
| 87.2 2 |
0.0088 13 |
e+b+ |
| 169.26 4 |
0.44 3 |
e+b+ |
| 254.29 5 |
11.0 4 |
IT |
| 762.3 1 |
0.192 9 |
e+b+ |
| 770.97 10 |
|
e+b+ |
| 781.57 13 |
|
e+b+ |
| 824.82 12 |
0.44 |
e+b+ |
| 835.38 12 |
0.103 4 |
e+b+ |
| 906.84 16 |
0.0028 5 |
e+b+ |
| 917.45 17 |
0.0128 22 |
e+b+ |
| 993.81 21 |
0.0020 3 |
e+b+ |
| 1004.49 20 |
0.022 3 |
e+b+ |
|
X-rays from 137mCe (34.4 h 3)
|
|---|
| E (keV) |
I (%) | Assignment |
|---|
|
| 4.121 |
6.0E-05 8 |
La Ll |
| 4.289 |
0.152 21 |
Ce Ll |
| 4.529 |
2.5E-05 3 |
La Lh |
| 4.634 |
1.63E-04 19 |
La La2 |
| 4.651 |
0.00147 17 |
La La1 |
| 4.730 |
0.059 7 |
Ce Lh |
| 4.822 |
0.41 5 |
Ce La2 |
| 4.840 |
3.7 4 |
Ce La1 |
| 5.042 |
0.00091 10 |
La Lb1 |
| 5.062 |
8.1E-05 17 |
La Lb4 |
| 5.143 |
1.4E-04 3 |
La Lb3 |
| 5.212 |
1.24E-05 14 |
La Lb6 |
| 5.263 |
2.18 24 |
Ce Lb1 |
| 5.276 |
0.26 5 |
Ce Lb4 |
| 5.363 |
0.43 9 |
Ce Lb3 |
| 5.384 |
0.00031 4 |
La Lb2 |
| 5.434 |
0.032 4 |
Ce Lb6 |
| 5.483 |
3.1E-06 4 |
La Lb5 |
| 5.613 |
0.78 9 |
Ce Lb2 |
| 5.792 |
1.35E-04 15 |
La Lg1 |
| 5.891 |
1.45E-06 20 |
La Lg6 |
| 6.054 |
0.33 4 |
Ce Lg1 |
| 6.061 |
2.3E-05 5 |
La Lg2 |
| 6.075 |
3.3E-05 7 |
La Lg3 |
| 6.326 |
0.075 16 |
Ce Lg2 |
| 6.342 |
0.106 23 |
Ce Lg3 |
| 32.658 |
1.16E-06 7 |
La Ka3 |
| 33.034 |
0.0081 4 |
La Ka2 |
| 33.442 |
0.0149 8 |
La Ka1 |
| 33.894 |
0.00256 13 |
Ce Ka3 |
| 34.279 |
15.9 7 |
Ce Ka2 |
| 34.720 |
29.1 13 |
Ce Ka1 |
| 37.720 |
0.00140 7 |
La Kb3 |
| 37.801 |
0.00271 14 |
La Kb1 |
| 38.084 |
3.28E-05 20 |
La Kb5 |
| 38.726 |
0.00088 5 |
La Kb2 |
| 38.826 |
2.12E-04 13 |
La Kb4 |
| 39.170 |
2.78 13 |
Ce Kb3 |
| 39.258 |
5.36 25 |
Ce Kb1 |
| 39.551 |
0.067 4 |
Ce Kb5 |
| 40.228 |
1.72 8 |
Ce Kb2 |
| 40.333 |
0.49 3 |
Ce Kb4 |
Betas from 137mCe (34.4 h 3)
|
|---|
| Eb endpoint (keV) |
Ib (%) | Decay mode |
|---|
|
| 471.95 |
0.00 4 |
e |
| 558.97 |
0.000 3 |
e |
| 641.09 |
0.00 5 |
e |
| 714.09 |
0.002 13 |
e |
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