Developments towards in-gas-jet laser spectroscopy studies of actinium isotopes at LISOL

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

卷:376

Article; Proceedings Paper

Raeder, S.^1,2,3  Bastin, B.⁴  Block, M.^2,3,6  Creemers, P.¹  Delahaye, P.⁴  Ferrer, R.¹  Flechard, X.⁵  Franchoo, S.⁷  Ghys, L.^1,12  Gaffney, L. P.^1,13  Granados, C.¹  Heinke, R.⁸  Hijazi, L.⁴  Huyse, M.¹  Kron, T.⁸  Kudryavtsev, Yu.¹  Laatiaoui, M.^2,3  Lecesne, N.⁴  Luton, F.⁴  Moore, I. D.⁹  Martinez, Y.¹  Mogilevskiy, E.^1,10  Naubereit, P.⁸  Piot, J.⁴  Rothe, S.¹¹  Savajols, H.⁴  Sels, S.¹  Sonnenschein, V.⁹  Traykov, E.⁴  Van Beveren, C.¹  Van den Bergh, P.¹  Van Duppen, P.¹  Wendt, K.⁸  Zadvornaya, A.¹ 

[1] Katholieke Univ Leuven, Inst Kern & Stralingsfys, Celestijnenlaan 200D, B-3001 Leuven, Belgium

[2] Helmholtz Inst Mainz, D-55128 Mainz, Germany

[3] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany

[4] CEA, GANIL, CNRS, DSM,IN2P3, BP 55027, F-14076 Caen, France

[5] Univ Caen, LPC Caen, ENSICAEN, CNRS,IN2P3, F-14032 Caen, France

[6] Johannes Gutenberg Univ Mainz, Inst Kernchem, D-55128 Mainz, Germany

[7] Inst Phys Nucl IPN Orsay, F-91406 Orsay, France

[8] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[9] Univ Jyvaskyla, Dept Phys, POB 35 YFL, FI-40014 Jyvaskyla, Finland

[10] Moscow MV Lomonosov State Univ, Fac Mech & Math, Leninskie Gory 1, Moscow 119992, Russia

[11] CERN, CH-1211 Geneva, Switzerland

[12] Belgian Nucl Res Ctr, SCK CEN, Boeretang 200, B-2400 Mol, Belgium

[13] Univ West Scotland, Sch Engn, Paisley PA1 2BE, Renfrew, Scotland

关键词: Resonance ionization spectroscopy;    Gas cell;    Gas jet;    Actinium;   

DOI  :  10.1016/j.nimb.2015.12.014

来源: Elsevier

【 摘 要 】

To study exotic nuclides at the borders of stability with laser ionization and spectroscopy techniques, highest efficiencies in combination with a high spectral resolution are required. These usually opposing requirements are reconciled by applying the in-gas-laser ionization and spectroscopy (IGLIS) technique in the supersonic gas jet produced by a de Laval nozzle installed at the exit of the stopping gas cell. Carrying out laser ionization in the low-temperature and low density supersonic gas jet eliminates pressure broadening, which will significantly improve the spectral resolution. This article presents the required modifications at the Leuven Isotope Separator On-Line (LISOL) facility that are needed for the first on-line studies of in-gas-jet laser spectroscopy. Different geometries for the gas outlet and extraction ion guides have been tested for their performance regarding the acceptance of laser ionized species as well as for their differential pumping capacities. The specifications and performance of the temporarily installed high repetition rate laser system, including a narrow bandwidth injection-locked Ti:sapphire laser, are discussed and first preliminary results on neutron-deficient actinium isotopes are presented indicating the high capability of this novel technique. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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