Direct measurement of the L/K ratio in (7)Be electron capture.
نویسندگان
چکیده
The ratio of L- to K-shell electron captures in light nuclei is particularly sensitive to electron overlap and exchange effects. Calculations of these effects in (7)Be disagree by more than 20%. We report a measurement of the L/K ratio in (7)Be, using a cryogenic microcalorimeter which clearly separates L- and K-shell captures. The obtained L/K ratio of 0.040(6) is less than half that of existing predictions for free (7)Be. The discrepancy is likely due to in-medium effects distorting the L-shell electron orbitals.
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ورودعنوان ژورنال:
- Physical review letters
دوره 88 1 شماره
صفحات -
تاریخ انتشار 2002