title: Magnesium-28 in rain: produced by cosmic rays.
abstract: Existence of magnesium-28 (half-life, 21.3 hours) produced by cosmic rays in rain at concentrations of 1.7 and 6.1 x 10(-1) atoms per milliliter was established radiochemically by isolating this nuclide from several hundred liters of rain samples collected at Fayetteville, Arkansas.
authors.forename: L
authors.initials: L
authors.lastname: Husain
authors.forename: P K
authors.initials: PK
authors.lastname: Kuroda