RESEARCH IN NUCLEAR AND RADIOCHEMISTRY. Progress Report for Year Ending January 31, 1961

Technical Report · Tue Oct 31 00:00:00 EST 1961

OSTI ID:4025066

Sugihara, T T

Products in Alpha-induced Reactions. The recoil rsnges of cobalt nuclides formed in alpha-irradiated manganese were measured for alpha energies of 19, 23, and 27 Mev and normalized to that of Co/sup 57/. Product recoil ranges are also reported for the reactions Ni/sup 58/( alpha , alpha p) and ( alpha , alpha n), Ni/sup 6 / 0>s ( alpha ,2n), Cu/sup 65/( alpha 2n) Cu/sup 63/( alpha 2n) and ( alpha ,pn), and Cu ( alpha , an) at alpha energies of 25 to 30 Mev; Zn/ sup 62/ was found to have a shorter average range than Ni/sup 57/ and Co/sup 57/. The results are discussed with reference to rsnge ratios, compound-nucleus theory, and evaporation effects. Products in Bombardment of Niobium. Isomeric ratios were measured for the ( alpha ,2p), ( alpha ,n), and ( alpha ,2n) reactions of Nb/sup 93/. HaIf Life of In/sup 117/< sg>s. Cadmium metal was irradiated by 14- and 5-Mev deuterons and subjected to radiochemical separation. (amma spectrum decay analysis gave a half life of in/sup 117//sup m/ as 1.93 plus or minus 0.04 hr and of In/sup 117//sup g/ as 38.0 plus or minus 0.5 min, in agreement with Nuclear Data Sheets but in disagreement with McGinnis' 1.1-hr value for the half life of ln/sup 117//sup g/. Studies of the In/sup 1> / 5>s ( alpha ,2p)In/sup 117/ Reaction. lsomeric ratios were measured for the In/sup 115/ ( alpha ,2p) reaction at alpha energies of 23 to 27 Mev. The cross section for In/sup 117//sup g/ is approximately 0.5 mb at 27 Mev and decreases somewhat with decreasing energy, while that for In/sup 117//sup m/ is -0.15 mb at 27 Mev and nearly independent of energy. The results indicate that a compound-nucleus mechanism is not involved. Recoil Studies of Uranium Fission Fragments. Nuclear recoils from U/sup 238/ fission induced by 150-Mev protons were studied, and calculated recoil parameters and kinetic energies are presented for Cu/sup 64/, Cu/sup 64/, Ga/sup 72/, Sr/sup 91/, P d/sup 112/, Ag/sup 111/ Ag/sup 112/, Ag/sup 112/, Ag/sup 1/1/sup >/s3>s, In/sup 117//sup m/ Ba/sup 139/, and Ba/sup 140/ together with momentum transferred and deposition energies. Some preliminary results for 45-Mev proton bombardments are discussed. Szilard-Chalmers Reactions in Metal Porphines, The Szilard-Chalmers reaction was investigated in tetraphenylporphines of Co, Ni, Cu, Zn, Pd, and Ft. The effects of various irradiation and extraction conditions and thermal annealing on the organic retentions were studied. There is no correlation between the retention values and the mass of the recoil atom, and variations in irradiation conditions have little influence on retention values for Pd, Cu, and Zn, while the results for Ni indicate it may be sensitive to radiation annealing. Large isotope effects were found in Zn sad Pd- the Zn/sup 69//Zn/sup 65/ and Pd/sup 109//Pd/sup 103/ retent ion ratios are 2.8 and 1.5, respectively. Analytical Chemistry of Cesium and Rubidium. Thallium phosphotungstate was foumd to be an excellent ion exchanger for cesium and absorbs cesium and rubidium quantitatively from large volumes of sea water. Elution of cesium and rubidium from the ion exchanger was studied; a 0.4M HNO/sub 3/ solution containing 5 x 10/sup -3/M TlNO/sub 3/ removes rubidium quantitatively and cesium not at all, while solutions of higher TlNO/sub 3/ concentrations remove cesium as well. Analytical Radiochemistry of Actinium. A chemical separation method for separating actinium from lanthanum is outlined which involves chromatographic and counting steps. lon Exchange Studies of Alkaline Earths. Distribution coefficients between Oowex A-1 resin and solution were determined for Mg, Ca, Sr, and Ra as a function of pH, and the order of affinity was found to be Ra> Ca> Sr> Mg. Separation of Ca snd Sr in a Dowex A-1 column was studied, and it is concluded that the separation is not satisfactory due to the large band-widths. (D.L.C.)

• Research Organization: Clark Univ., Worcester, Mass.
• DOE Contract Number: AT(30-1)-1930
• NSA Number: NSA-15-016969
• OSTI ID: 4025066
• Report Number(s): TID-11815
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-61
• Country of Publication: United States
• Language: English

Related Subjects

CHEMISTRY
ACIDITY
ALKALI METALS
ALKALINE EARTH METALS
ALPHA PARTICLES
ANNEALING
ATOMS
BARIUM 139
BARIUM 140
CADMIUM
CALCIUM
CESIUM
COBALT
COBALT 57
COBALT ISOTOPES
COMPOUND NUCLEI
COPPER
COPPER 63
COPPER 64
COPPER 65
COPPER 67
CROSS SECTIONS
DECAY
DEUTERON BEAMS
DISTRIBUTION
ENERGY
EVAPORATION
EXCITATION
FISSION PRODUCTS
GALLIUM 72
GAMMA RADIATION
HALF-LIFE
HEATING
INDIUM 115
INDIUM 117
INDUCTION
ION EXCHANGE
ION EXCHANGE MATERIALS
IRRADIATION
ISOMERS
ISOTOPE EFFECTS
LANTHANUM
MAGNESIUM
MANGANESE
MEASURED VALUES
METALS
NICKEL
NICKEL 57
NICKEL 58
NICKEL 60
NIOBIUM
NIOBIUM 93
NITRIC ACID
NUCLEAR REACTIO