Description & History
pro·me·thi·um (1948):
a radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium
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|
Element
| Symbol | Pm |
| Z | 61 |
| Atomic Weight | 147. |
|---|
| Density | 6.78200006 |
|
Edge Energies
(keV)
| K | 45.1839981 |
|---|
| L1 | 7.42799997 |
|---|
| L2 | 7.01300001 |
|---|
| L3 | 6.46000004 |
|---|
| M | 1.65100002 |
|---|
| K-alpha | 38.6489983 |
|---|
| K-beta | 43.9449997 |
|---|
| L-alpha | 5.63600016 |
|---|
| L-beta | 6.20599985 |
|---|
|
Edge jumps
| K | 5.91229582 |
|---|
| L1 | 1.15958512 |
|---|
| L2 | 1.40999997 |
|---|
| L3 | 2.7019999 |
|---|
|
Fluorescence
yield
| K | 0.925000012 |
|---|
| L1 | 0.0659999996 |
|---|
| L2 | 1.65100002 |
|---|
| L3 | 38.6489983 |
|---|
|
