|
Natural tungsten contains five stable isotopes. Twenty one other unstable isotopes are recognized.
|
Natural
Abun. (%) |
Atomic
Mass |
Half-
life |
Decay Mode
/Energy (/MeV) |
Part. En.
/Intensity
(MeV/%) |
Cross-sect.
Ther. Neut.
(b) |
Spin
(h/2 pi) |
Magnetic
Dipl.Mom.
(nm) |
Electric
Quad. Mom.
(b) |
Gamma En.
/Intensity
(MeV/%) |
158W |
|
157.97383 |
0.9ms |
alpha |
|
|
|
|
|
|
159W |
|
158.97239 |
7ms |
alpha |
|
|
|
|
|
|
160W |
|
159.94848 |
0.08s |
alpha |
5.92 |
|
0+ |
|
|
|
161W |
|
160.94714 |
0.41s |
ß+,E.C./ 8.4
alpha |
5.78 |
|
|
|
|
|
162W |
|
161.96329 |
1.39s |
ß+,E.C./ 5.8
alpha |
5.54 |
|
0+ |
|
|
|
163W |
|
162.96227 |
2.8s |
ß+,E.C./ 7.5
alpha |
5.38 |
|
|
|
|
|
164W |
|
163.95882 |
6s |
ß+,E.C./ 4.9
alpha |
5.15 |
|
0+ |
|
|
rad. an. |
165W |
|
164.95811 |
5.1s |
ß+,E.C./ 6.8
alpha |
4.91 |
|
|
|
|
rad. an. |
166W |
|
165.95502 |
16s |
ß+,E.C./ 4.4
alpha |
4.74 |
|
0+ |
|
|
rad. an. |
167W |
|
166.95454 |
20s |
E.C./ 6.1 |
|
|
|
|
|
|
168W |
|
167.95186 |
53s |
E.C./ 3.7 |
|
|
|
|
|
|
169W |
|
168.95175 |
1.3m |
E.C./ 5.4 |
|
|
|
|
|
|
170W |
|
169.94929 |
2.4m |
E.C./ 3 |
|
|
|
|
|
|
171W |
|
170.94946 |
2.4m |
E.C./ 4.6 |
|
|
|
|
|
|
172W |
|
171.94743 |
6.6m |
ß+,E.C./ 2.5 |
|
|
|
|
|
0.0359
0.1302
0.4576
0.6236 |
173W |
|
172.94771 |
6.3m |
E.C./ 3.8 |
|
|
|
|
|
0.0499
0.1057
0.3652
0.707 |
174W |
|
173.94616 |
35m |
E.C./ 1.7 |
|
|
0+ |
|
|
0.0354
0.3287
0.4288 |
175W |
|
174.94677 |
35m |
E.C./ 2.9 |
|
|
1/2- |
|
|
0.015 - 0.27 |
176W |
|
175.94559 |
2.5h |
ß+,E.C./ 0.8 |
|
|
0+ |
|
|
0.03358
0.06129
0.09487
0.1002 |
177W |
|
176.94661 |
2.21h |
E.C./ 2 |
|
|
1/2- |
|
|
Ta k x rays
0.15505
0.18569
0.42694 |
178W |
|
177.94584 |
21.6d |
E.C./ 0.09 |
|
|
0+ |
|
|
Ta k x rays |
179mW |
|
|
6.4m |
I.T./ 0.222
E.C. |
|
|
1/2- |
|
|
W k x rays
0.222 |
179W |
|
178.947067 |
38m |
E.C./ 1.06 |
|
|
7/2- |
|
|
Ta k x rays
0.0307 |
180W |
0.12 % |
179.946701 |
|
|
|
4 b |
0+ |
|
|
|
181W |
|
180.948192 |
121.2d |
E.C./ 0.19 |
|
|
9/2+ |
|
|
Ta k x rays
0.13617
0.15221 |
182W |
26.3 % |
181.948202 |
|
|
|
20 b |
0+ |
|
|
|
183mW |
|
|
5.15s |
I.T. |
|
|
11/2+ |
|
|
W k x rays
0.0465
0.0526
0.0991
0.1605 |
183W |
14.28 % |
182.95022 |
|
|
|
10.5 b |
1/2- |
0.11778 nm |
|
|
184W |
30.7 % |
183.950928 |
|
|
|
2 b |
0+ |
|
|
|
185mW |
|
|
1.6m |
I.T./ 0.1974 |
|
|
11/2+ |
|
|
W k x rays
0.0659
0.1315
0.1737 |
185W |
|
184.953416 |
74.8d |
ß-/ 0.433 |
0.433/ 99.9 |
3.3 b |
3/2- |
|
|
0.12536 |
186W |
28.6 % |
185.954357 |
|
|
|
36 b |
0+ |
|
|
|
187W |
|
186.957153 |
23.9h |
ß-/ 1.312 |
0.624
1.315 |
70 b |
3/2- |
0.62 nm |
|
Re k x rays
0.0725
0.47951
0.68572 |
188W |
|
187.95848 |
69.4d |
ß-/ 0.349 |
0.349/ 99 |
|
0+ |
|
|
0.0636
0.2271
0.2907 |
189W |
|
188.9619 |
11.5m |
ß-/ 2.5 |
1.4
2.5 |
|
3/2- |
|
|
0.258
0.417
0.55 |
190W |
|
189.96321 |
30m |
ß-/ 1.3 |
0.95 |
|
0+ |
|
|
Re k x rays
0.1576
0.1621 |
|
