The sievert (symbol Sv) is an SI derived unit of radiation dose. It is defined as the dose received in one hour at a distance of 1 cm from a point source of 1 mg of radium in a 0.5 mm thick platinum enclosure. It is approximately equivalent to 8.4 röntgens or 21.6 curie/kilogram.
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... density is 943.4/km² (2,444.3/mi²). There are 5,418 housing units at an average density of 300.6/km² (778.8/mi²). The racial makeup of the town ...