Ff. Karpeshin et al., OPTICAL-PUMPING TH-229M THROUGH NEET AS A NEW EFFECTIVE WAY OF PRODUCING NUCLEAR ISOMERS, Physics letters. Section B, 372(1-2), 1996, pp. 1-7
A new highly effective way of optical pumping of the 3.5 eV isomeric s
tate in Th-229m is proposed, allowing one to reach the inverse populat
ion of the ground and isomeric state. The way is based on Nuclear Exci
tation in the nonradiative 8p-8s Electronic Transition (NEET). For thi
s purpose, NEET theory is revised to take energy conservation into acc
ount.