Table 1.

Nuclear reaction types for the various proposals

		Reaction	Cross section
			10-24 cm2 (=barn)
Reactor	Current, alternative 3, 4	n + 235U → 99Mo + xx + 2n	(586 × 6% =) 35
	Alternative 1	n + 98Mo → 99Mo	0.14
Accelerator	Alternative 2	γ + 238U → 99Mo + xx + 2n	0.16 × 6%
		γ + 100Mo → 99Mo + n	0.16
		p + 100Mo → 99Mo + p + n	0.15
		p + 100Mo → 99mTc + 2n	0.20

n neutron, γ photon, p proton, xx other fission products