Description & History
fran·ci·um (1946):
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium and obtained artificially by the bombardment of thorium with protons
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Element
| Symbol | Fr |
| Z | 0 |
| Atomic Weight | -1.99985075 |
|---|
| Density | 0. |
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Edge Energies
(keV)
| K | 2.10053062 |
|---|
| L1 | 2.33094978 |
|---|
| L2 | 2.00911665 |
|---|
| L3 | 2.33094978 |
|---|
| M | 2.0189085 |
|---|
| K-alpha | -1.99987841 |
|---|
| K-beta | 3.8406992 |
|---|
| L-alpha | -1.99986362 |
|---|
| L-beta | 2.10064292 |
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|
Edge jumps
| Edge jumps can not be calculated for z < 10 |
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|
Fluorescence
yield
| K | 2.01948357 |
|---|
| L1 | 1.40129846E-45 |
|---|
| L2 | 2.0189085 |
|---|
| L3 | -1.99987841 |
|---|
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