title: The temporal variations of (7)Be, (210)Pb and (210)Po in air in England.
abstract: We have conducted measurements of naturally occurring radionuclides (7)Be, (210)Pb and (210)Po in air at ground level at Chilton, Oxfordshire, England. The sampling and analysis regime for the latter two isotopes has been optimised to minimise uncertainties in measurement due to decay of (210)Po and in-growth of (210)Pb during the sampling and analysis period. Analysis times were reduced by using Cerenkov counting to assay the (210)Bi daughter of (210)Pb. Monthly data collected over a four-year period are presented and discussed. (7)Be activity concentrations appear to peak in spring. (210)Pb activity concentrations also follow a seasonal trend reflecting different (222)Rn emanation rates from soil during winter and summer. Data for (210)Po show no such trend.
authors.affiliation: NNC Limited, UKAEA Site, Winfrith Newburgh, Dorchester, England DT2 8WQ, UK.
authors.forename: S R
authors.initials: SR
authors.lastname: Daish
authors.forename: A A
authors.initials: AA
authors.lastname: Dale
authors.forename: C J
authors.initials: CJ
authors.lastname: Dale
authors.forename: R
authors.initials: R
authors.lastname: May
authors.forename: J E
authors.initials: JE
authors.lastname: Rowe
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001608:Beryllium / Q000032:analysis*; D001729:Bismuth / Q000032:analysis; D004739:England; D007856:Lead Radioisotopes / Q000032:analysis*; D011059:Polonium / Q000032:analysis*; D011834:Radiation Monitoring; D011868:Radioisotopes / Q000032:analysis*; D012621:Seasons
chemical_list: D000396:Air Pollutants, Radioactive; D007856:Lead Radioisotopes; D011868:Radioisotopes; D011059:Polonium; D001608:Beryllium; D001729:Bismuth