In-source laser spectroscopy with the Laser Ion Source and Trap: first direct study of the ground-state properties of 217,219Po
In-source laser spectroscopy with the Laser Ion Source and Trap: first direct study of the ground-state properties of 217,219Po
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使用激光离子源和离子阱进行源内激光光谱分析：首次直接研究 217,219Po 的基态特性
DOI：
10.1103/physrevx.5.011018
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发表时间：
2015
影响因子：
12.5
通讯作者：
K. Wendt
中科院分区：
文献类型：
--
作者：
D. Fink;T. Cocolios;A. Andreyev;S. Antalic;A. Barzakh;B. Bastin;D. Fedorov;V. Fedosseev;K. Flanagan;L. Ghys;A. Gottberg;M. Huyse;N. Imai;T. Kron;N. Lecesne;K. Lynch;B. Marsh;D. Pauwels;E. Rapisarda;S. Richter;R. Rossel;S. Rothe;M. Seliverstov;A. Sjoedin;C. Beveren;P. Duppen;K. Wendt
在欧洲核子研究中心Isolde安装了用于厚靶、同位素分离在线设施的激光离子源和陷阱(LIST)，用于生产纯的、激光电离的放射性离子束。它提供两种工作模式，一种是离子导向器，其工作原理类似于标准的Isolde共振电离激光离子源(RILIS)；另一种是选择性更强的离子源，来自热离子源腔的表面电离离子被电极排斥，而激光电离则在射频四极离子导向器内进行。LIST的首次物理应用使Isolde富含中子的钚同位素的离子束中的Fr污染被抑制了1000多次，而激光电离效率仅降低了20%。共振电离光谱直接在LIST设备内进行，使人们能够首次研究217Po的超精细结构和同位素位移。首次进行了~(219Po)Po的核衰变谱测量，揭示了它的半衰期、衰变分支比和粒子能量。这项实验证明了该清单在放射性离子束设施生产和研究稀有同位素纯束方面的适用性。
A Laser Ion Source and Trap (LIST) for a thick-target, isotope-separation on-line facility has been implemented at CERN ISOLDE for the production of pure, laser-ionized, radioactive ion beams. It offers two modes of operation, either as an ion guide, which performs similarly to the standard ISOLDE resonance ionization laser ion source (RILIS), or as a more selective ion source, where surface-ionized ions from the hot ion-source cavity are repelled by an electrode, while laser ionization is done within a radiofrequency quadrupole ion guide. The first physics application of the LIST enables the suppression of francium contamination in ion beams of neutron-rich polonium isotopes at ISOLDE by more than 1000 with a reduction in laser-ionization efficiency of only 20. Resonance ionization spectroscopy is performed directly inside the LIST device, allowing the study of the hyperfine structure and isotope shift of 217Po for the first time. Nuclear decay spectroscopy of 219Po is performed for the first time, revealing its half-life, ?- to-?-decay branching ratio, and ?-particle energy. This experiment demonstrates the applicability of the LIST at radioactive ion-beam facilities for the production and study of pure beams of exotic isotopes.
影响因子：
3.1
作者：
I. Budinvcevi'c;J. Billowes;M. Bissell;T. Cocolios;R. P. Groote;S. Schepper;V. Fedosseev;K. Flanagan;S. Franchoo;R. Ruiz;H. Heylen;K. Lynch;B. Marsh;G. Neyens;T. Procter;R. Rossel;S. Rothe;I. Strashnov;H. H. Stroke-H.;K. Wendt
通讯作者：
I. Budinvcevi'c;J. Billowes;M. Bissell;T. Cocolios;R. P. Groote;S. Schepper;V. Fedosseev;K. Flanagan;S. Franchoo;R. Ruiz;H. Heylen;K. Lynch;B. Marsh;G. Neyens;T. Procter;R. Rossel;S. Rothe;I. Strashnov;H. H. Stroke-H.;K. Wendt
影响因子：
2.9
作者：
Cheal, B.;Cocolios, T. E.;Fritzsche, S.
通讯作者：
Fritzsche, S.
影响因子：
8.6
作者：
P. Goddard;P. Stevenson;Arnau Rios
通讯作者：
P. Goddard;P. Stevenson;Arnau Rios