SeRun 02-13-17
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Simulations
Selenium Irradiation Setup for MCNP simulations:
Flux
MCNP results for photon flux through the samples (electron beam energy is 21 MeV, energy bins are 100 keV, selenium density is 4.2 g/cc, selenium sample is cylindrical, 2 cm in diameter, 2 cm in height):
The selenium disk has a diameter of 0.5 cm and a thickness of about 2 mm
Cross-sections for various reactions (adopted from TALYS):
Production rate (1/sec) in 1 gram of natural Se (or natural Ni) assuming 22 MeV 1 microA current
| Tube 1 | Tube 2 | Tube 3 | Tube 4 | |
| Ni-57 | 1.8x10^5 | 3.4x10^4 | 5.5x10^3 | 6.0x10^3 |
| Se-79 | 1.5x10^6 | 2.7x10^5 | 6.2x10^4 | 6.0x10^4 |
| Se-75 | 1.2x10^6 | 2.3x10^5 | 4.6x10^4 | 4.6x10^4 |
| Se-80 | 1.4x10^6 | 2.4x10^5 | 5.9x10^4 | 5.6x10^4 |
Yields of Ni-57 and some selenium isotopes assuming 22 MeV 1 microA current:
