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Alt 17.02.2010, 22:37   #4   Druckbare Version zeigen
Rosentod Männlich
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AW: Überwachungspflichtige Chemikalien

Zitat:
Boron consists of two naturally-occurring isotopes, B-10 and B-11, with abundances of approximately 19.9% and 80.1%, respectively. The lighter isotope is used in the nuclear power industry, since B-10 is an efficient neutron absorber and can therefore be used to control the neutron flux in pressurized water reactors. In practice, boric acid is added to the reactor cooling water, neutron absorption converting B-10 to tritium (H-3) and alfa-particles via the B-10(n, 2 alpha)H-3 reaction [1]. During reactor operation, the concentration of B-10 in the cooling water changes, a process that can be monitored by measurements of boron isotope ratios.
aus http://www.isotope-analysis.com/applications.asp
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