The numerical simulation of a nuclear pumped 3He–Ne–Ar gas laser (λ=585.3 nm)
has been made to estimate the optimal gas mixtures. The calculation shows that
the optimization is established under a condition of He pressure of 2280 Torr, Ne
pressure of 24 Torr, and Ar pressure of 8 Torr. The oscillation is expected to occur at a
thermal neutron flux density of 3.3×1014 cm-2 s-1 when the cavity length is 50 cm and
the mirror reflection coefficient is 99%. On the other hands, the energy efficiency
does not exceed 0.33% under the same condition.