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Article
Interaction of elemental mercury with selenium surfaces: model experiments for investigations of superheavy elements copernicium and flerovium
The adsorption behavior of 197Hg and 183–185Hg on red amorphous selenium (red a-Se) and trigonal selenium (t-Se) was investigated experimentally by off-line and on-line gas chromatographic methods, in preparation...
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Article
Production of isotopes and isomers with irradiation of Z = 47–50 targets by 23-MeV bremsstrahlung
The irradiations of Ag to Sn targets by bremsstrahlung generated with 23-MeV electron beams are performed at the MT-25 microtron. Gamma spectra of the induced activities have been measured and the yields of al...
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Article
Methods for producing 195m Pt isomer
Among nuclides, 195m Pt isomer is characterized by a number of properties that make it suitable for use in nuclear medicine. Effective ways of optimizing the Pt isomer yield at low impurity conten...
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Article
Isolation of radionuclides from thorium targets irradiated with 300-MeV protons
Procedures were developed for isolation and separation of radionuclides from a thorium target irradiated with 300-MeV protons. A large set of radionuclides, including those of heavy elements (225,226Ac, 223,224,2...
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Article
Coprecipitation of Ti, Zr, and Hf as Rf homologs with La fluoride from solutions of hydrofluoric acid
The discovery of relatively longer half-lives of transactinides 104 267 Rf (T 1/2 ∼ 1.3 h) and 105 ...
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Article
Production of the (I = 19/2) high-spin isomer 135Cs in photonuclear reactions
The yields of 135Cs nuclei in a high-spin (19/2) isomeric state and of nuclei neighboring it were measured for photonuclear reactions of the (γ, f) and (γ, α) types. The experiments in question were performed by ...
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Article
Use of a nanostructured material for separation of 238U and 237U produced by the photonuclear reaction 238U(γ, n)237U
237U was produced by the reaction 238U(γ, n) on an electron accelerator, MT-25 microtron, at the Flerov Laboratory of Nuclear Reactions. For the separation of 237U and [238U, the recoil nuclei were collected by a...
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Article
Sorption of U(VI) with soil from the region of location of the Novi Khan radioactive waste repository in Bulgaria
Sorption of U(VI) with soil from the region of location of the radioactive waste repository was studied. The radionuclide 237U produced by the photonuclear reaction 238U(γ, n)237U on an electron accelerator, MT-2...
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Article
A simple and quick method for the preparation of radionuclide 87Y/87mSr generator using the natRb(α,xn)87Y reaction
A rapid method for the preparation of 87Y/87mSr radionuclide generator from a rubidium chloride target irradiated with 35 MeV α-particles is described. A simple two-step procedure is used to obtain a carrier-free...
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Article
Ion-exchange separation of Zr and Hf microamounts in dilute HCl/HF solutions: A model system for chemical identification of Rf and study of its properties
A procedure was developed for selective separation of Group IV elements from Sr and Lu, followed by rapid separation of Zr and Hf by cation-exchange chromatography in dilute HCl/HF solutions. The possibility o...
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Article
Cation-exchange separation of Group V elements: Model experiments on isolation and chemical identification of Db
A cation-exchange procedure was developed for separating Nb from Ta, Pa from Ta, and Nb, Pa, and Ta from Zr, Hf, and lanthanides in dilute HC1/HF solutions. The stability of the fluoride complexes of Group IV ...
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Article
Separation of group five elements by reversed-phase chromatography
A chemical separation method based on reversed-phase chromatography has been developed to separate the group five elements from the reaction products produced in the bombardment of 243Am with 48Ca ions. Decontami...
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Article
Chemical characterization of element 112
Element 112 was discovered at the Heavy Ion Research Laboratory in Darmstadt, Germany in 1996. A decade on, and some of its chemical properties have now been determined. Irradiation of plutonium-242 with inten...
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Article
Electrophoretic method for the determination of diffusion coefficients of ions in aqueous solutions*
The electrophoretic method was recently developed for the determination of diffusion coefficients of ions in aqueous solution. By solving the Fick's second law in the presence of unlimited media and constant q...