@article{1c25b158778347d7a80267c6a7fb5a7d,
title = "Heavy ion separation with a gas-filled magnetic spectrograph",
abstract = "Heavy ions passing through a magnetic field region filled with gas experience atomic charge-changing collisions and follow trajectories approximately determined by the mean charge state in the gas. The properties of a gas-filled Enge magnetic spectrograph are studied in detail by measuring focal-plane position spectra of fast heavy ions and their evolution as a function of gas pressure. The method allows physical separation of pairs of isobaric ions in the focal plane. Applications in accelerator mass spectrometry 0experiments are described. At intermediate low pressures, single atomic charge-changing processes can be identified. A Monte Carlo simulation program of the ion transport through the gas-filled magnet is developed and reproduces closely the experimental behavior.",
author = "Michael Paul and Glagola, {Bruce G.} and Walter Henning and Keller, {J{\"o}rg G.} and Walter Kutschera and Zenhao Liu and Rehm, {Karl Ernst} and Bernhard Schneck and Siemssen, {Rolf H.}",
note = "Funding Information: We should like to thank E. Kanter for helpful discussions an atomic physics problems. This work was supported in part by the USA-Israel Binational Science Foundation. Funding Information: Magnetic spectrographs have been widely utilized for the detection and identification of light and heavy ions. The magnetic rigidity, given by the momentum of the ion divided by its electric charge, governs the trajectory of the ion in a magnetic field region and is normally a constant throughout the path of the ion in vacuum. The dispersion for ions with different magnetic rigidities results in a spatial distribution in the focal plane of the apparatus, which can be measured often with high resolution. Together with other parameters like energy or velocity, it can be used for the identification of the ion. The situation is complicated for heavy ions by the fact that, after passage through matter (e.g. target, absorber, foil window), the ions emerge with a distribution of ionic charge states; these ions follow different trajectories in the magnetic field, as determined by their charge state. On the other hand, for ions with the same mass numbers (isobaric nuclei), * Permanent address: Racah Institute of Physics, Hebrew University, Jerusalem 91904, Israel. * * Permanent address: GSI Darmstadt, D-6100 Darmstadt, FRG. + On leave from Institute of Modern Physics, Lanzhou, People's Republic of China. ++ On leave from Physics Department, Technical University of Munich, D-8046 Garching, FRG. § Permanent address: Rijksuniversiteit, Groningen, The Netherlands. §§ Work supported by the US Department of Energy, Nuclear Physics Division, under Contract W-31-109-ENG-38.",
year = "1989",
month = may,
day = "1",
doi = "10.1016/0168-9002(89)90771-7",
language = "English",
volume = "277",
pages = "418--430",
journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
issn = "0168-9002",
publisher = "Elsevier B.V.",
number = "2-3",
}