Showing papers by "H. G. Berry published in 1990"
TL;DR: Electron-polarized N{sup 4+} ions were produced via electron capture by a beam of N* ions in an optically pumped polarized sodium target to point to the feasibility of a general method for the production of polarized multicharged heavy-ion beams.
Abstract: Electron-polarized N{sup 4+} ions were produced via electron capture by a beam of N{sup 5+} ions in an optically pumped polarized sodium target. The polarization of the ions was detected by measuring the circular polarization of the N V 1{ital s} {sup 2}2{ital s} {sup 2}{ital S}--1{ital s} {sup 2}2{ital p} {sup 2}{ital P} (124 nm) transition taking place after the electron capture. These studies point to the feasibility of a general method for the production of polarized multicharged heavy-ion beams.
13 citations
TL;DR: In this article, the authors reported a measurement of the lifetime of 2.1(7.1) ps in helium-like Br{sup 33+ +, which is the upper bound of the theoretical error due to long-lived cascades from highly excited states.
Abstract: We report a measurement of the lifetime of the 2{sup 3}{ital S}{sub 1} level in heliumlike {sup 79}Br{sup 33+}. Our result is {tau}{sup exp}(2 {sup 3}{ital S}{sub 1})=224.1(7.1) ps. This agrees with the theoretical calculation of 230(2) ps and provides a test of {ital O}({ital Z}{sup 2}{alpha}{sup 2}) corrections to the lifetime. The experimental error is dominated by uncertainties in the correction required to account for long-lived cascades from highly excited states.
12 citations
12 citations