The in-gas-jet laser ion source: Resonance ionization spectroscopy of radioactive atoms in supersonic gas jets

详细信息    查看全文

• 作者：Yu. Kudryavtsev ; ^{Yuri.Kudryavtsev@fys.kuleuven.be} ; R. Ferrer ; M. Huyse ; P. Van den Bergh ; P. Van Duppen
• 关键词：Resonance ionization spectroscopy ; Laser ion source ; Gas jet ; de Laval nozzle ; Spike nozzle
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2013
• 出版时间：15 February, 2013
• 年：2013
• 卷：297
• 期：Complete
• 页码：7-22
• 全文大小：1803 K

文摘

New approaches to perform efficient and selective step-wise resonance ionization spectroscopy (RIS) of radioactive atoms in different types of supersonic gas jets are proposed. This novel application results in a major expansion of the in-gas laser ionization and spectroscopy (IGLIS) method developed at KU Leuven. Implementation of resonance ionization in the supersonic gas jet allows to increase the spectral resolution by one order of magnitude in comparison with the currently performed in-gas-cell ionization spectroscopy. Properties of supersonic beams, obtained from the de Laval-, the spike-, and the free jet nozzles that are important for the reduction of the spectral line broadening mechanisms in cold and low density environments are discussed. Requirements for the laser radiation and for the vacuum pumping system are also examined. Finally, first results of high-resolution spectroscopy in the supersonic free jet are presented for the 327.4 nm 3d¹⁰4s ²S_1/2¡ú 3d¹⁰4p ²P_1/2 transition in the stable ⁶³Cu isotope using an amplified single mode laser radiation.