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Gamma-ray tables for neutron fast neutron and photon activation analysis

I. List of all the nuclides with their associated gamma-rays in order of increasing atomic number and mass

Journal of Radioanalytical and Nuclear Chemistry
Authors:
S. Lis
,
Ph. Hopke
, and
J. Fasching

Abstract  

In the past several years, a number of gamma-ray tables have been published. All of the tables limit themselves to those nuclides formed in (n, γ) reactions or at most to a few of the more prominent (n, 2n) products. A number of investigators are developing activation analysis methods using fast neutrons or photons. These investigations have been hampered by the lack of tables of gamma-rays of those nuclides that can be formed by (n, 2n), (n, p), (n, α), (n, n′) and (n, d) reactions. Since (γ, n) yields the same product as (n, 2n) the table would also be useful to photon activation studies. The authors have compiled such a table. Section II: list of the gamma-rays for all isotopes in order of increasing energy will be published in the J. Radioanal. Chem., 25 (1975) No. 2.

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Gamma-ray tables for neutron, fast-neutron and photon activation analysis

II. List of all the gamma-rays for all isotopes in order of increasing energy

Journal of Radioanalytical and Nuclear Chemistry
Authors:
S. Lis
,
Ph. Hopke
, and
J. Fasching
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Investigation of extraction of actinyl ions with inorganic ligands

I. Extraction of U(VI), Np(VI) and Pu(VI) by the TBP-HNO3 system

Journal of Radioanalytical and Nuclear Chemistry
Authors:
L. Fuks
,
S. Lis
, and
I. Fidelis

Abstract  

Extraction coefficients of hexavalent actinide ions have been determined by extraction chromatography, utilizing its selectivity towards oxidation states.

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Abstract  

The preparation, spectroscopic characterization and thermal stability of neutral complexes of uranyl ion, UO2 2+, with phosphonate ligands, such as diphenylphosphonic acid (DPhP), diphenyl phosphate (DPhPO) and phenylphosphonic acid (PhP) are described. The complexes were prepared by a reaction of hydrated uranyl nitrate with appropriate ligands in methanolic solution. The ligands studied and their uranyl complexes were characterized using thermogravimetric and elemental analyses, ESI-MS, IR and UV–Vis absorption and luminescence spectroscopy as well as luminescence lifetime measurements. Compositions of the products obtained dependent on the ligands used: DPhP and DPhPO form UO2L2 type of complexes, whereas PhP forms UO2L complex. Based on TG and DTG curves a thermal stability of the complexes was determined. The complexes UO2PhP·2H2O and UO2(DPhPO)2 undergo one-step decomposition, while UO2PhP · 2H2O is decomposed in a two-step process. The thermal stability of anhydrous uranyl complexes increases in the series: DPhPO < PhP < DPhP. Obtained IR spectra indicate bonding of P–OH groups with uranyl ion. The main fluorescence emission bands and the lifetimes of these complexes were determined. The complex of DPhP shows a green uranyl luminescence, while the uranyl emission of the UO2PhP and UO2(DPhPO)2 complexes is considerably weaker.

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