| Autor: |
Santala, M. I. K., Daavittila, A. S., Lauranto, H. M., Salomaa, R. R. E. |
| Předmět: |
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| Zdroj: |
Applied Physics B: Lasers & Optics; 1997, Vol. 64 Issue 3, p339, 9p |
| Abstrakt: |
Because of its large neutron capture cross-section, gadolinium (Gd) is widely used as burnable poison in nuclear reactors. Only two of its naturally occurring seven isotopes are strong neutron absorbers; hence, it would be desirable to enrich Gd in those isotopes. We demonstrate experimentally that significant enrichment can be achieved by two-step laser-ionization by relatively broad-band (bandwidth 1–2 GHz) lasers and by utilizing the isotope shifts only. Our results indicate that the content of the strong absorbers can be raised from the natural 30% to nearly 70%. We also compare the performance of this partially enriched Gd to natural Gd and to pure [sup 157] Gd, the most strongly absorbing isotope, as burnable poison. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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