Summary
Energy shifts of the electronic\(K_{\alpha _1 } \) X-ray lines of the lead isotopes 204, 206, 207 and 208 have been measured with high precision. Theoretical values for δ〈r 2〉 and δ〈r 4〉 have been computed in the framework of a microscopic model for a number of lead isotopes. The theoretical results agree quite well with the measured shifts. The present data are compared with previous X-ray shift data, with muonic data, with shifts resulting from a combined evaluation of electron scattering and muonic data and with atomic optical data.
Riassunto
Sono stati misurati con alta precisione gli spostamenti d’energia delle linee elettroniche\(K_{\alpha _1 } \) dei raggi X degli isotopi del piombo 204, 206, 207 e 208. I valori teorici di δ〈r 2〉 e δ〈r 4〉 sono stati calcolati nell’ambito di un modello microscopico per alcuni isotopi del piombo. I risultati teorici sono in accordo abbastanza soddisfacente con gli spostamenti misurati. Si confrontano i dati attuali con precedenti dati sullo spostamento dei raggi X, con dati muonici, con spostamenti risultanti da una valutazione combinata dello scattering elettronico e dei dati muonici e con dati atomici ottici.
Реэюме
С высокой точностью были иэмерены знергетические сдвиги злектрон-ных\(K_{\alpha _1 } \) рентгеновских линий для иэотопов свинца 204, 206, 207 и 208. В рамках микроскопической модели для ряда иэотопов свинца вычисляются теоретические эначенияδ〈r 2〉 иδ〈r 4〉. Теоретические реэультаты довольно хорощо согласуются с иэмеренными сдвигами. Полученные данные сравниваются с предыдушими дан-ными по сдвигам рентгеновского иэлучения, с мюнными данными, со сдвигами, вытекаюшими иэ совместных оценок злектронного рассеяния и мюонных данных, и с атомными оптическими данными.
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Research sponsored also by the Division of Basic Energy Sciences, U.S. Department of Energy, under contract W-7405-eng-26 with the Union Carbide Corporation.
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Borchert, G.L., Schult, O.W.B., Speth, J. et al. Differences of the mean square charge radii of the stable lead isotopes observed through electronicK X-ray shifts. Nuov Cim A 73, 273–294 (1983). https://doi.org/10.1007/BF02734669
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DOI: https://doi.org/10.1007/BF02734669