title: A note on the half-life of 209Po.
abstract: The widely adopted value of (102+/-5)a for the (209)Po half-life, which is based on a single determination reported in 1956, appears to be in error by a large factor. Decay data from two separate primary standardizations of a (209)Po solution standard, conducted approximately 12 years apart, are inconsistent with the adopted value and its assigned uncertainty. An estimated half-life, larger than the adopted value by about 25%, is more consistent with the standardization data. A longer half-life is also supported by measurements on a recently standardized (210)Pb solution standard.
authors.affiliation: Ionizing Radiation Division, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8462, USA. rcolle@nist.gov
authors.forename: R
authors.initials: R
authors.lastname: Collé
authors.forename: Lizbeth
authors.initials: L
authors.lastname: Laureano-Perez
authors.forename: Iisa
authors.initials: I
authors.lastname: Outola