Abstract: An optically pumped laser which includes a laser diode array for generating optically pumped radiation having a uniform intensity distributed over a broad band-width, and a lasant material with an absorption band for receiving radiation within such bandwidth.

Abstract: An indirect hydrogen sulfide conversion process for the production of elemental hydrogen and sulfur. The process is based upon the electrochemical oxidation of iodide in an aqueous solution with a pH in the range of 0 to 1 at high current densities and current efficiencies. Hydrogen gas is produced concurrently with soluble triiodide. Treatment of a gaseous or non-aqueous liquid stream with electrolyte solutions containing triiodide yields a sulfur product in plastic form. The sulfur product can be recrystallized from a solvent to yield sulfur of comparable purity to that presently produced.

Abstract: Novel compositions of matter are disclosed having the general formula UO.sub.2 AA'L.sub.n, in which A and A' are anions whose conjugate acids have boiling points less than about 200.degree. C. and pK.sub.a values of 4.8 or less, L is a neutral ligand (1) having a boiling point of greater than about 200.degree. C. and an equilibrium constant for its exchange reaction with complexed tetrahydrofuran of greater than about 10.sup.-3, or (2) having an equilibrium constant for its exchange reaction with complexed tetrahydrofuran of greater than about 10.sup.3, and n is an integer of from 1 to 4.

Abstract: Processes are disclosed for the separation of isotopes of an element comprising vaporizing uranyl compounds having the formula (UO.sub.2 A.sub.2).sub.n, where A is a monovalent anion and n is an integer from 2 to 4, the compounds having an isotopically shifted infrared absorption spectrum associated with uranyl ions containing said element which is to be separated, and then irradiating the uranyl compound with infrared radiation which is preferentially absorbed by a molecular vibration of uranyl ions of the compound containing a predetermined isotope of that element so that excited molecules of the compound are provided which are enriched in the molecules of the compound containing that predetermined isotope, thus enabling separation of these excited molecules. The processes disclosed include separation of the excited molecules by irradiating under conditions such that the excited molecules dissociate, and also separating the excited molecules by a discrete separation step.

Abstract: A process for producing relatively pure metal phosphorus trisulfides of the formula MPS.sub.3 wherein M is a metal selected from the group consisting of Mg, Ca, Sr, V, Mn, Fe, Co, Ni, Pd, Zn, Cd, Hg, Sn, Pb, Sm, Eu, Yb and mixtures thereof, said process comprising contacting in a reaction zone, phosphides of said metals of the formula M.sub.x P.sub.y, wherein the ratio of y/x ranges between 1/8 to 5/1, with one or more compounds of the formula PS.sub.z wherein z ranges from 1-3 and is preferably 2, said PS.sub.z being present in the reaction zone in an amount sufficient to exceed the amount of P and S stoichiometrically required to form the desired MPS.sub.3, at a temperature ranging from about 300.degree.-600.degree. C. and confined so as to maintain the PS.sub.z present in the reaction zone as a gas in equilibrium with its liquid for a time sufficient to produce said relatively pure metal phosphorus trisulfide.

Abstract: UO.sub.2 for nuclear fuel is made from UF.sub.6. The method involves injecting UF.sub.6, with or without a nitrogen carrier, into a solution containing 1) an inert reaction medium, 2) water, 3) a Lewis base. The precipitate from the above reaction is then reduced in H.sub.2 at a temperature below 750.degree. C. to give ceramic grade UO.sub.2.

Abstract: Compositions of matter are described comprising the intercalation of Lewis bases into the layer lattice structure of UO.sub.2 F.sub.2 or by formation of directed chemical bonds between an electron donor atom of the Lewis base and the uranium ions in UO.sub.2 F.sub.2. Thermal treatment of these compositions results in the release of the Lewis base unchanged and the recovery of the uranyl fluoride.

Abstract: A process for producing UO.sub.2 F.sub.2 from a soluble uranyl salt. The uranyl salt is combined with a soluble fluoride salt in a solvent to form a reaction solution. The solvent exhibits Lewis base characteristics. The reaction product is a crystalline solid which is separated from the reaction solution. The UO.sub.2 F.sub.2 may then be obtained from the crystalline solid.

Abstract: A process for increasing the average reaction rate of reduction of UO.sub.2 F.sub.2. The UO.sub.2 F.sub.2 is treated with an organic compound which interacts with the UO.sub.2 F.sub.2. The combination is decomposed to yield UO.sub.2 F.sub.2 in a kinetically reactive state.

Abstract: The present invention is directed to compositions of matter having the formula M.sub.2 UO.sub.2 F.sub.2 where each M is any alkali metal ion or mixtures thereof. The present invention is also directed to electrochemical cells having anodes containing anode-active alkali metal, electrolytes capable of conducting ions of said alkali metal, and cathodes containing cathode-active material having the formula M.sub.2 UO.sub.2 F.sub.2 where each M is any alkali metal ion or mixtures thereof. In another embodiment the cathode-active material has the formula UO.sub.2 F.sub.2.

Abstract: Radioactive ruthenium, molybdenum and technetium which are by-products of the fission of U.sup.235 are prevented from contaminating the environment during nuclear fuel reprocessing procedures by passing the radioactive ruthenium, molybdenum and/or technetium oxides over a trapping agent selected from the group consisting of alkaline earth compounds, lanthanide compounds and lead compounds at a temperature of over 500.degree. C. leading to the formation of nonvolatile ruthenates, molybdates and technetates. By this process volatile radioactive RuO.sub.4, MoO.sub.3 and Tc.sub.2 O.sub.7 are kept from escaping into the atmosphere during nuclear fuel reprocessing. The stable ruthenates, molybdates and technetates thus formed can then be easily isolated and contained during the period of maximum radioactive decay.