Polarography of divalent manganese in sodium formate solution

Summary A well defined wave for manganese in 1 M sodium formate solution is reported and its use for the determination of microquantities of the element is indicated. Several foreign ions studied do not cause any interferences.

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Zusammenfassung Die polarographische Bestimmung von Mikromengen Mangan kann mit gutem Erfolg in einer Grundlösung aus 1 m Natriumformiat durchgeführt werden. Eine Anzahl untersuchter Anionen verursacht keine Störungen.

     

On the Re-function of the A-X system of No+

The band intensity factors, and r-centroids are reported, for bands of the A-X system of NO⁺, a stable molecular ion of astrophysical and aeronomical interest. The need for further laboratory band intensity measurements, is indicated, in order to resolve the existing ambiguity of the R_e-function of the system.     

Studies on the extraction of vanadium (IV) in the presence of some anions and neutral oxygen donors

Extraction of vanadium (IV) in the presence of perchlorate, nitrate, halides, and thiocyanate and neutral oxygen donors liken-butanol, TBP and antipyrine into various solvents is studied. Composition of the extracting species and the stability constants are determined. The effectiveness of the three neutral oxygen donors studied in the extraction of vanadium (IV)-anion systems is found to follow the order: antipyrine > TBP >n-butanol.     

Internal Bremsstrahlung from14C and36Cl

The Internal Bremsstrahlung (IB) spectra emitted in the beta decays of¹⁴C and³⁶Cl are measured with a HPGe detector and a multichannel analyser along with a standard geometrical set up. The experimental results are compared with the corresponding theoretical distributions due to Knipp and Uhlenbeck and Bloch (KUB), Lewis and Ford, Nilsson and also due to Chang and Falkoff. The total IB yields of intensity and of energy from each of the isotopes in the investigated energy regions are also determined and compared with the corresponding theoretical values. The present results of IB from¹⁴C are found to be in excess over all the corresponding theoretical distributions throughout the investigated photon energy region from 60 keV to 130 keV. It may also be pointed out that the IB from this isotope has not been studied earlier and as such the results in this case are considered new and important. In the case of³⁶Cl the experimental results are found to be above KUB theory but corresponding closely to the theory of Chang and Falkoff, except below 150 keV where there is experimental excess over theory.