title: Solid state studies of the radiation history of lunar samples.
abstract: Particle track densities up to > 3 x 10(9) per square centimeter have been measured in different samples. Rocks 17, 47, 57, and 58 have VH (Z >22) galactic cosmic ray ages of 11, 14, 28, and 13 x 10(6) years, respectively. Rock 57 has a calculated erosion rate of 10(-7) centimeter per year. Near-surface track versus depth data in rock 17 can be fit with solar flare particles that have a differential energy spectrum aE(-3); lunar samples can be used to study the history of solar activity. The uranium in the crystalline rocks occurs principally in small regions <10 to approximately 100 micrometers in size. The (low) thermoluminescence of the fines increases with depth in core 10004. With one possible exception, x-ray studies have not shown pronounced radiation damage effects. The total energy release upon heating is small up to 900 degrees C and occurs in three broad regions.
authors.forename: G
authors.initials: G
authors.lastname: Crozaz
authors.forename: U
authors.initials: U
authors.lastname: Haack
authors.forename: M
authors.initials: M
authors.lastname: Hair
authors.forename: H
authors.initials: H
authors.lastname: Hoyt
authors.forename: J
authors.initials: J
authors.lastname: Kardos
authors.forename: M
authors.initials: M
authors.lastname: Maurette
authors.forename: M
authors.initials: M
authors.lastname: Miyajima
authors.forename: M
authors.initials: M
authors.lastname: Seitz
authors.forename: S
authors.initials: S
authors.lastname: Sun
authors.forename: R
authors.initials: R
authors.lastname: Walker
authors.forename: M
authors.initials: M
authors.lastname: Wittels
authors.forename: D
authors.initials: D
authors.lastname: Woolum