title: Neutron-activation analysis for thorium in zircon.
abstract: The thorium content of zircons and standard rock samples was determined by neutron-activation analysis. The 310-keV photopeak activity of (233)Pa was enhanced by a prior chemical separation which removed interfering induced activities.
authors.affiliation: Analytical Division Bhabha Atomic Research Centre Modular Laboratories Trombay, Bombay-85 (AS), India.
authors.forename: H B
authors.initials: HB
authors.lastname: Desai
authors.forename: R
authors.initials: R
authors.lastname: Parthasarathy
authors.forename: M S
authors.initials: MS
authors.lastname: Das