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dc.contributor.authorKoolwijk AC
dc.contributor.authorMattern FCM
dc.contributor.authorDrost RMS
dc.date.accessioned2012-12-12T21:30:32Z
dc.date.available2012-12-12T21:30:32Z
dc.date.issued1990-09-30
dc.identifier243301002
dc.identifier.urihttp://hdl.handle.net/10029/260924
dc.description.abstractAbstract niet beschikbaar
dc.description.abstractIn 1989 airborne particles were daily sampled, using a sampling-period of 24 hours. After 5 days decay of the short-lived daughters of radon and thoron gross-alpha, gross-beta and gross-gamma activities were measured. The yearly average of gross-alpha activity was 0.04 mBq/m3, of gross-beta activity 0.18 mBq/m3, and of gross-gamma activity 0.19 mBq/m3. These mean levels are quite similar to those of 1988. Applying gamma-spectroscopy no artificial radionuclides could be detected in airborne particles. Only the natural activationproduct Be-7 was detectable. The yearly average was 1.2 mBq/m3 and the contribution to the gross-gamma activity was estimated at approximately 0.12 mBq/m3. The major contributions to gross-alpha and gross-beta activity in airborne particles are most likely explained by natural Po-210 resp. Pb-210/Bi-210.
dc.description.sponsorshipHIMH/TK
dc.format.extent33 p
dc.language.isonl
dc.relation.ispartofRIVM Rapport 243301002
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/243301002.html
dc.subject16nl
dc.subjectluchtstofnl
dc.subjectairborne particlesnl
dc.subjectradioactiviteitnl
dc.subjectradioactivity; totaal alphanl
dc.subjectgross-alphanl
dc.subjecttotaal betanl
dc.subjectgross-betanl
dc.titleOnderzoek naar radioactiviteit in luchtstof te De Bilt. Resultaten over 1989nl
dc.title.alternativeThe radioactivity of airdust-samples. Results for De Bilt for 1989.en
dc.typeReport
dc.date.updated2012-12-12T21:30:33Z
html.description.abstractAbstract niet beschikbaar
html.description.abstractIn 1989 airborne particles were daily sampled, using a sampling-period of 24 hours. After 5 days decay of the short-lived daughters of radon and thoron gross-alpha, gross-beta and gross-gamma activities were measured. The yearly average of gross-alpha activity was 0.04 mBq/m3, of gross-beta activity 0.18 mBq/m3, and of gross-gamma activity 0.19 mBq/m3. These mean levels are quite similar to those of 1988. Applying gamma-spectroscopy no artificial radionuclides could be detected in airborne particles. Only the natural activationproduct Be-7 was detectable. The yearly average was 1.2 mBq/m3 and the contribution to the gross-gamma activity was estimated at approximately 0.12 mBq/m3. The major contributions to gross-alpha and gross-beta activity in airborne particles are most likely explained by natural Po-210 resp. Pb-210/Bi-210.


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