Mo-99 Production: Difference between revisions
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3.) single neutron emissions makes up about 60% of the photofission X-section <math>\Rightarrow</math> <math>^{100}Mo(\gamma, n)</math> X-sect is about 96 mbarns when photon energy is 15 MeV | 3.) single neutron emissions makes up about 60% of the photofission X-section <math>\Rightarrow</math> <math>^{100}Mo(\gamma, n)</math> X-sect is about 96 mbarns when photon energy is 15 MeV | ||
4.) 40 million nuclear medicine procedures are performed each year, 20 million in the US. 80% of those procedures use Mo-99. | |||
5.) The U.S. uses 6,000 - 7,000 6-day curies per week. 6-day curies = amount of Mo-99 left after 6 days ( half life is 66 hours < 3 days). | |||
Revision as of 03:35, 11 January 2009
The above report suggests that
1.) you get about [math]\displaystyle{ 10^{12} \frac{neutrons}{s \cdot kW} }[/math] when a 30 MeV electron beam hits a converter like Tungsten producing photons which hit a 5 cm thick Moly target. A 100 kW electron beam could make about 800 Ci/s of Mo-99.
2.) The [math]\displaystyle{ ^{100}Mo(\gamma, f) }[/math] X-sect peaks at 160 mbarns when the photon energy is 15 MeV:(photofission of Mo-100 and U-238 have similar X-sections)
3.) single neutron emissions makes up about 60% of the photofission X-section [math]\displaystyle{ \Rightarrow }[/math] [math]\displaystyle{ ^{100}Mo(\gamma, n) }[/math] X-sect is about 96 mbarns when photon energy is 15 MeV
4.) 40 million nuclear medicine procedures are performed each year, 20 million in the US. 80% of those procedures use Mo-99.
5.) The U.S. uses 6,000 - 7,000 6-day curies per week. 6-day curies = amount of Mo-99 left after 6 days ( half life is 66 hours < 3 days).