54 Result(s)
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Article
Precise simultaneous determination of zirconium and hafnium in silicate rocks, meteorites and lunar samples
A precise, sensitive and rapid analytical technique has been developed for the simultaneous determination of Zr and Hf in natural silicate matrices. The technique is based on radiochemical neutron activation a...
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Article
Effect of outer cations and water of crystallization on the radiolytic decomposition of nitrates
The γ-ray induced decomposition of several inorganic nitrates CsNO3, TlNO3, Mg/NO3/2.6H2O, Ca/NO3/2.4H2O, Hg/NO3/2, Hg/NO3/2.2H2O, Pb/NO3/2 and Al/NO3/3.9H2O has been studied at an absorbed dose of {5 Mrads. G/NO
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Article
Correlation of isomer shift and quadrupole splitting and the sign of EFG
Mössbauer isomer shift /δ/ and quadrupole splitting /ΔEQ/ values in a series of isostructural compounds correlate well to give linear relationship provided the sign of electric field gradient /EFG/ is assigned to...
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Article
Simultaneous determination of Rb and Cs by RNAA method
A RNAA method has been developed for the simultaneous determination of Rb and Cs in geological samples. The method is based on precipitation with sodium tetraphenylborate followed by NaI(Tl) gamma spectrometry...
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Article
NAA determiantion of iron and silicon in USGS standards and bauxites using fast neutrons from241Am-Be source
Fast neutron-activation methods have been developed for the determination of iron and silicon in USGS and Indian standards and bauxites. Nuclear reactions56Fe/n, p/56Mn and28Si/n, p/28Al were carried out using241
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Article
Gamma-ray induced decomposition of some divalent and trivalent nitrates
Gamma-ray induced decomposition of some divalent nitrates, viz. Mg(NO3)2·6H2O, Ca(NO3)2·4H2O, Sr(NO3)2, Ba(NO3)2, Zn(NO3)2·6H2O, Cd(NO3)2·4H2O, Hg(NO3)2·2H2O, Mn(NO3)2·4H2O, Cu(NO3)2·3H2O and trivalent nitrates, ...
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Article
Isotopic sources in neutron activation analysis
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Neutron activation analysis of geological and biological samples using short-term reactor irradiation and successive counting
Short-term reactor irradiation followed by successive counting over long periods has been used for the nondestructive determination of more the 20 elements in geological and biological samples. The samples, al...
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Article
INAA of human and animal whole blood samples by short term reactor irradiation
Instrumental Neutron Activation Analysis /INAA/ has been employed for the determination of 15 major, minor and trace elements in human and animal blood samples. Dry whole blood samples along with NBS and IAEA ...
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Article
Half life alteration in56Mn and128I by chemical environment
Half life of56Mn in Mn, MnCl2.4H2O, KMnO4, MnO2, MnSO4.4H2O and that of128I in I2, NaI, KI, KIO4, HIO4, KIO3 was measured. The nuclides were produced by thermal neutron bomabardment in241Am-Be neutron source and ...
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Article
Determination of Fe and Zn in biological samples by radiochemical neutron activation analysis
Radiochemical NAA methods have been developed for the simultaneous determination of Fe and Zn in biological samples. The method involves reactor irradiation, dissolution in 3M HCl and solvent extraction follow...
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Article
Radiochemical solvent extraction of molybdenum/VI/ using99Mo tracer
A radiochemical solvent extraction method has been developed for the micro determination of Mo/VI/ using99Mo tracer. It involves removal of99mTc by ethyl methyl ketone /EMK/ and extraction of Mo with tri-n-butyl ...
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Article
Multielemental analysis of IAEA intercomparison standard Hay Powder, V-10 and some edible plant leaves by neutron activation
Instrumental Neutron Activation Analysis (INAA) has been employed for the multielemental determination of an IAEA intercomparison standard Hay Powder, V-10 and some edible plant leaves consumed in India. The s...
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Article
Quadrupole hyperfine interaction in iron(III) dicarboxylic acid complexes
Mössbauer and infrared spectroscopic studies of a series of iron(III) complexes of dicarboxylic acids, maleic, malonic, succinic, glutaric, adipic, pimelic, suberic, azealic and sebacic have been carried out a...
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Article
Gamma radiolytic decomposition of solid binary mixtures of potassium nitrate with halides
Gamma-ray induced decomposition of solid binary mixtures of KNO3 with halides viz. KCl, KBr and KI has been studied at room temperature. G(NO 2 − ) values were ...
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Article
Thermal neutron activation analysis of Cu in its ores by using an241Am−Be neutron source
A thermal neutron activation method has been developed for the determination of Cu in Cu−Pb−Zn ores and chalcopyrite ore concentrates using the reaction63Cu(N, γ)64Cu. The samples were irradiated with thermal neu...
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Article
Radiochemical solvent extraction of Mn(II) using54Mn tracer
A radiochemical solvent extraction method has been developed for the determination of Mn(II) using54Mn tracer. Mn(II) is complexed with 2-thenoyltrifluoroacetone (TTA) at pH 8.5 and extracted in isobutyl methyl k...
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Article
Determination of phosphorus in biological samples by thermal neutron activation followed by β--counting
Phosphorus has been determined using the β- emitter32P by instrumental neutron activation analysis (INAA) in several NBS and IAEA standards and samples of biological origin such as human and animal blood, cancero...
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Article
Radiochemical solvent extraction of Au(III) using thionalide in ethyl methyl ketone/iso buthyl methyl ketone
A radiochemical method for the determination of gold using198Au, has been developed. It is based on the synergistic extraction of Au(III) with thionalide (TA) in ethyl methyl ketone (EMK) or isobuthyl methyl keto...
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Article
Gamma-radiolysis of solid zirconium nitrate and its binary mixtures with potassium halides
Gamma-radiolytic decomposition of zirconium nitrate and its binary mixtures with potassium halides viz. KCl, KBr and KI has been studied at different compositions up to an absorbed dose of 550 kGy. Radiolytic ...
