Use of a Continuous Wave Laser and Pockels Cell for Sensitive High-Resolution Collinear Resonance Ionization Spectroscopy.
Use of a Continuous Wave Laser and Pockels Cell for Sensitive High-Resolution Collinear Resonance Ionization Spectroscopy.
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DOI：
10.1103/physrevlett.115.132501
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发表时间：
2015-09
影响因子：
8.6
通讯作者：
R. de Groote;I. Budincevic;J. Billowes;M. Bissell;T. Cocolios;G. Farooq-Smith;V. Fedosseev;K. Flanagan;S. Franchoo;R. F. Garcia Ruiz;H. Heylen;R. Li;K. Lynch;B. Marsh;G. Neyens;R. Rossel;S. Rothe;H. H. Stroke-H.;K. Wendt;S. Wilkins;X. Yang
中科院分区：
文献类型：
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作者：
R. de Groote;I. Budincevic;J. Billowes;M. Bissell;T. Cocolios;G. Farooq-Smith;V. Fedosseev;K. Flanagan;S. Franchoo;R. F. Garcia Ruiz;H. Heylen;R. Li;K. Lynch;B. Marsh;G. Neyens;R. Rossel;S. Rothe;H. H. Stroke-H.;K. Wendt;S. Wilkins;X. Yang
新技术的发展使欧洲核子研究中心ISOLDE共线共振电离光谱（CRIS）实验的分辨率提高了2个数量级，同时又不牺牲CRIS技术的高效率。在放射性的钫束流上获得了20(1)MHz的实验线宽，使我们第一次确定了短寿命的电四极矩[t_{1/2}=22.0(5) ms] ^{219}Fr Q_{s}=-1.21(2) eb，如果没有新方法提供的优势，这是不可能的。该方法依靠连续波激光器和外部波克尔斯电池产生窄带光脉冲，以达到两步共振电离的高分辨率。以几百个离子/秒的速率产生的奇异核现在可以用高分辨率进行研究，从而可以对核理论的锚点进行详细的研究。
New technical developments have led to a 2 orders of magnitude improvement of the resolution of the collinear resonance ionization spectroscopy (CRIS) experiment at ISOLDE, CERN, without sacrificing the high efficiency of the CRIS technique. Experimental linewidths of 20(1) MHz were obtained on radioactive beams of francium, allowing us for the first time to determine the electric quadrupole moment of the short lived [t_{1/2}=22.0(5) ms] ^{219}Fr Q_{s}=-1.21(2) eb, which would not have been possible without the advantages offered by the new method. This method relies on a continuous-wave laser and an external Pockels cell to produce narrow-band light pulses, required to reach the high resolution in two-step resonance ionization. Exotic nuclei produced at rates of a few hundred ions/s can now be studied with high resolution, allowing detailed studies of the anchor points for nuclear theories.