title: Pressure measurement made by the utilization of ruby sharp-line luminescence.
abstract: A rapid, convenient technique for precision pressure measurement in the diamond-anvil high-pressure cell, which makes use of the sharp-line (R-line) luminescence of ruby, has been developed. The observed shift is -0.77 +/-0.03 reciprocal centimeters per kilobar for R(1) and -0.84+/- 0.03 reciprocal centimeters per kilobar for R(2) to lower energy and is approximately linear in the range studied (to 22 kilobars). Line-broadening has been observed in some instances and has been tentatively identified with nonhydrostatic conditions surrounding the ruby sample.
authors.forename: R A
authors.initials: RA
authors.lastname: Forman
authors.forename: G J
authors.initials: GJ
authors.lastname: Piermarini
authors.forename: J D
authors.initials: JD
authors.lastname: Barnett
authors.forename: S
authors.initials: S
authors.lastname: Block