Summary
An investigation of the radiations from181W was made by means of a high transmissionβ-spectrometer, a proportional counter spectrometer and a scintillation spectrometer.181W was found to emit onlyL X- andK X-radiations, characteristic of Ta, arising fromL- andK-capture. The decay energy was found to be:E 0=92 keV, and the transition was classified as once forbidden (AI=0, 1; yes). The pairing effect in the region aroundA = 181 from the Suess-Jensen plot is briefly discussed.
Riassunto
Vengono studiate le radiazioni emesse dal181W per mezzo di uno spettrometro β ad alta trasmissione, uno spettrometro a contatore proporzionale ed uno spettrometro a scintillazione. Si trova che il181W emette soltanto radiazioniL X eK X caratteristiche del Ta provenienti da catturaL e da catturaK. Per l’energia di decadimento si ottieneE 0=92 keV. La transizione è classificata 10 proibita (ΔI=0, 1; si). Si segnala infine l’effetto di accoppiamento per protoni e neutroni dispari, nella regione intorno adA = 181, ricavabile dal diagramma di Suess e Jensen.
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Bisi, A., Terrani, S. & Zappa, L. On the total decay energy in the orbital electron capture of181W. Nuovo Cim 1, 651–656 (1955). https://doi.org/10.1007/BF02855223
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DOI: https://doi.org/10.1007/BF02855223