A new beamline for laser spin-polarization at ISOLDE-猫眼课题宝

DOI：

10.1016/j.nima.2019.01.082

发表时间：

2018-09

期刊：

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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中科院分区：

其他

文献类型：

作者：

W. Gins;R. Harding;M. Baranowski;M. Bissell;R. Ruiz;M. Kowalska;G. Neyens;S. Pallada;N. Severijns;P. Velten;F. Wienholtz;Z. Xu;X. Yang;D. Z. K. Leuven;Instituut voor Kern- en Stralingsfysica;Leuven;Belgium;Epa department;Cern;Switzerland.;U. York;York;United Kingdom.;F. O. Physics;Adam Mickiewicz University;Poznán;Poland;S. O. Physics;Astronomy;The University of Manchester;Manchester;Pozna'n University of Technology;Npi;Czech Academy of Sciences;Rez;Czech Republic

在欧洲核子研究中心的ISOLDE，已经建造了一条专门用于生产激光偏振放射性光束的光束线。我们在这里提出了不同的模拟导致它的设计和建设，以及完整设置的技术细节和几个放射性同位素的实现极化的例子。波束线模拟结果表明，整条波束线传输良好，与观测结果一致。本文研究了26、28 Na和35 Ar原子与激光相互作用长度对诱导核自旋极化的影响。原子的自旋极化系综的绝热自旋旋转计算，以及这如何影响观察到的核系综极化，也进行了相同的核。对于35ar，我们发现多频泵浦将系综极化提高了1.85倍，这与速率方程模型的预测一致。

A beamline dedicated to the production of laser-polarized radioactive beams has been constructed at ISOLDE, CERN. We present here different simulations leading to the design and construction of it, as well as technical details of the full setup and examples of the achieved polarizations for several radioisotopes. Beamline simulations show a good transmission through the entire line, in agreement with observations. Simulations of the induced nuclear spin-polarization as a function of atom–laser interaction length are presented for 26, 28 Na, and for 35 Ar, which is studied in this work. Adiabatic spin rotation calculations of the spin-polarized ensemble of atoms, and how this influences the observed nuclear ensemble polarization, are also performed for the same nuclei. For 35 Ar, we show that multiple-frequency pumping enhances the ensemble polarization by a factor 1.85, in agreement with predictions from a rate equations model.

A new beamline for laser spin-polarization at ISOLDE

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