Abstract: A method is, herein, disclosed for separating a specific isotope from a mixture of isotopes by first irradiating the isotope mixture with a highly monochromatic laser light that resonates only with the energy level of the specific isotope so as to increase its chemical activity and then bombarding said specific isotope with a molecule containing highly reactive atoms so as to form a spatially separated compound rich in the specific isotope.

Abstract: There is herein, disclosed a dye laser including a container for a dye solution and a pumping energy source coupled thereto, said dye solution containing a perimidone dye formula (I): ##STR1## wherein R.sup.1 is a hydrogen atom, an alkyl group, a trifluoromethyl group, an alkoxycarbonyl group, an alkoxycarbonylalkyl group, an aralkyl group or a phenyl group; R.sup.2 is an optionally substituted alkoxycarbonyl group, a cyclohexyloxycarbonyl group, tetrahydrofurfuryloxycarbonyl group, an aryloxycarbonyl group, a benzyloxycarbonyl group, an acyl group, a cyano group or an optionally substituted carbamoyl group; R.sup.3 and R.sup.4 which may be the same or different are each a hydrogen atom, an alkyl group, an alkoxyalkyl group, an aralkyl group or an aryl group.

Abstract: A process and an apparatus are, herein, disclosed for producing microspheres of fissile and/or fertile materials with a high degree of sphericity from a feed solution starter containing at least one metal salt selected from among thorium, uranium and plutonium by using as a gelling medium an organic solvent that has a higher density and a greater interfacial tension with water than the feed solution and which is capable of dissolving ammonia.

Abstract: A method of lithium isotope separation by using a cryptand resin as an adsorbent is herein disclosed.