A study of on-line gas cell processes at IGISOL

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:268

Article

Moore, I. D.¹  Kessler, T.¹  Sonoda, T.¹  Kudryavstev, Y.²  Perajarvi, K.^1,3  Popov, A.⁴  Wendt, K. D. A.⁵  Aysto, J.¹ 

[1] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland

[2] Univ Louvain, Inst Kern En Stralingsfys, B-3001 Louvain, Belgium

[3] STUK Radiat & Nucl Safety Author, FI-00881 Helsinki, Finland

[4] Petersburg Nucl Phys Inst, St Petersburg 188350, Russia

[5] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

关键词: Gas cell;    Laser resonance ionization;    Ion-electron recombination;    Molecular formation;    Ion guide;   

DOI  :  10.1016/j.nimb.2009.12.001

来源: Elsevier

【 摘 要 】

The laser ion source at the IGISOL facility, Jyvaskyla, has been used to study the effects of the passage of a primary beam through an ion guide via the dynamic time profiles of yttrium and related molecular compounds. The accessibility of a neutral fraction for laser ionization is shown to be restricted to the nozzle region in the presence of a weak plasma. The survival of this neutral fraction cannot be explained by recombination of the buffer gas alone and perhaps indicates a suppression of the transport of ions due to a plasma-generated electric field. The concept of a competition between the processes that create and destroy the ion of interest is used to explain the different trends in the ratio of yttrium to yttrium oxide following the extraction of a stopped primary beam of Y-89(21+) both helium and argon buffer gases. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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