| |
|
|---|
| Half life: | 25.52 h 1 | |
|---|
| Jp: | 5/2+ |
|---|
| Sn (keV): | 5118.04 20 |
|---|
| Sp (keV): | 7.04E3 10 |
|---|
| Prod. mode: |
Naturally occurring
|
|---|
| | |
|---|
| ENSDF citation: | NDS 70,387 (1993) |
|---|
| Literature cut-off date: | 1-Aug-1993 |
|---|
| Author(s): | M.R. Schmorak |
|---|
| References since cut-off: |
231Th decay from 1993-98 (NSR)
|
|---|
| |
|---|
Decay properties:
|
|---|
| Mode | Branching (%) | Q-value (keV) |
References |
|---|
| b- | 100 | 389.5 17 |
75Ho14 |
| a | ~1E-8 | 4213.3 15 |
|
| |
|---|
Most Recent ENSDF Data (12/2002)
|
|---|
| Mode | Data set name | Display data |
|---|
|
|---|
| TORI Data (1999)
Gammas from 231Th (25.52 h 1)
|
|---|
| Eg (keV) |
Ig (%) | Decay mode |
|---|
|
| 9.21 3 |
|
b- |
| 10.25 |
|
b- |
| 17.193 4 |
|
b- |
| 18.053 4 |
0.33 |
b- |
| 19.1 |
|
b- |
| 25.646 4 |
14.5 3 |
b- |
| 26.55 5 |
0.54 3 |
b- |
| 29.30 5 |
0.035 2 |
b- |
| 32.73 5 |
0.073 4 |
b- |
| 33.32 5 |
0.030 2 |
b- |
| 38.90 5 |
0.110 6 |
b- |
| 41.55 5 |
0.016 1 |
b- |
| 42.22 5 |
0.052 3 |
b- |
| 42.838 5 |
0.058 4 |
b- |
| 44.080 13 |
0.0007 2 |
b- |
| 45.34 5 |
0.034 2 |
b- |
| 58.570 3 |
0.48 2 |
b- |
| 63.825 6 |
0.023 2 |
b- |
| 68.48 3 |
0.0057 14 |
b- |
| 72.751 3 |
0.251 15 |
b- |
| 77.685 17 |
|
b- |
| 81.227 3 |
0.89 5 |
b- |
| 82.087 3 |
0.40 3 |
b- |
| 84.216 3 |
6.6 3 |
b- |
| 85.80 5 |
0.0058 6 |
b- |
| 89.944 5 |
0.94 6 |
b- |
| 93.063 25 |
0.045 5 |
b- |
| 97.55 5 |
0.023 1 |
b- |
| 99.279 3 |
0.120 7 |
b- |
| 102.268 3 |
0.41 3 |
b- |
| 105.810 17 |
0.0071 7 |
b- |
| 106.587 16 |
0.017 1 |
b- |
| 106.85 10 |
0.03 |
b- |
| 115.590 6 |
0.0010 2 |
b- |
| 116.823 13 |
0.0207 13 |
b- |
| 124.925 4 |
0.056 3 |
b- |
| 134.025 13 |
0.024 1 |
b- |
| 135.667 11 |
0.078 5 |
b- |
| 136.714 18 |
0.0042 2 |
b- |
| 140.555 20 |
0.00071 7 |
b- |
| 145.052 6 |
0.0058 4 |
b- |
| 145.912 6 |
0.032 2 |
b- |
| 163.105 5 |
0.155 9 |
b- |
| 164.95 3 |
0.0039 4 |
b- |
| 169.635 17 |
0.0012 1 |
b- |
| 173.0 1 |
0.04 |
b- |
| 174.160 5 |
0.0181 11 |
b- |
| 183.495 3 |
0.0329 13 |
b- |
| 188.750 6 |
0.0032 2 |
b- |
| 217.940 18 |
0.040 3 |
b- |
| 224.1 1 |
0.0089 8 |
b- |
| 235.993 18 |
0.0092 6 |
b- |
| 237.8 1 |
0.09 |
b- |
| 240.26 4 |
0.00028 3 |
b- |
| 242.524 22 |
0.00084 8 |
b- |
| 249.57 4 |
0.00078 8 |
b- |
| 250.43 4 |
0.00065 7 |
b- |
| 267.62 4 |
0.00116 13 |
b- |
| 274.15 4 |
3E-5 1 |
b- |
| 308.74 5 |
0.00039 4 |
b- |
| 311.00 3 |
0.0029 2 |
b- |
| 317.95 4 |
8E-5 1 |
b- |
| 320.209 18 |
0.00011 1 |
b- |
| 351.84 4 |
7E-5 1 |
b- |
|
X-rays from 231Th (25.52 h 1)
|
|---|
| E (keV) |
I (%) | Assignment |
|---|
|
| 11.372 |
3.5 18 |
Pa Ll |
| 13.127 |
6 3 |
Pa La2 |
| 13.291 |
53 30 |
Pa La1 |
| 14.953 |
0.57 10 |
Pa Lh |
| 15.350 |
1.0 5 |
Pa Lb6 |
| 16.007 |
14 7 |
Pa Lb2 |
| 16.104 |
4.2 25 |
Pa Lb4 |
| 16.639 |
2.9 14 |
Pa Lb5 |
| 16.708 |
22 4 |
Pa Lb1 |
| 16.931 |
3.9 24 |
Pa Lb3 |
| 19.571 |
5.2 9 |
Pa Lg1 |
| 19.888 |
1.7 10 |
Pa Lg2 |
| 20.101 |
1.6 10 |
Pa Lg3 |
| 20.217 |
1.10 21 |
Pa Lg6 |
| 91.491 |
0.00137 14 |
Pa Ka3 |
| 92.282 |
0.42 4 |
Pa Ka2 |
| 95.863 |
0.69 7 |
Pa Ka1 |
| 107.595 |
0.084 9 |
Pa Kb3 |
| 108.422 |
0.160 17 |
Pa Kb1 |
| 109.072 |
0.0058 6 |
Pa Kb5 |
| 111.486 |
0.062 6 |
Pa Kb2 |
| 111.870 |
0.0216 24 |
Pa Kb4 |
Betas from 231Th (25.52 h 1)
|
|---|
| Eb endpoint (keV) |
Ib (%) | Decay mode |
|---|
|
| 37.66 |
0.0029 2 |
b- |
| 69.29 |
0.065 1 |
b- |
| 71.55 |
0.00078 6 |
b- |
| 142.18 |
2.7 5 |
b- |
| 171.26 |
0.32 20 |
b- |
| 206 |
12.8 11 |
b- |
| 215.34 |
1.3 2 |
b- |
| 287.23 |
12 7 |
b- |
| 288.09 |
37 15 |
b- |
| 305.28 |
35 15 |
b- |
| 311.81 |
0.33 |
b- |
| 330.93 |
0.33 |
b- |
| 389.5 |
0.022 7 |
b- |
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