ISOLDE上用于laser自旋极化的新光束线
A new beamline for laser spin-polarization at ISOLDE
摘要：
在欧洲核子研究中心的ISOLDE建立了一条专门用于产生激光偏振放射性核束的光束线。我们在这里提出了不同的模拟导致的设置的设计和建设，以及完整的设置和实现几个放射性同位素的偏振的例子的技术细节。光束线模拟显示了良好的传输通过整个线，与观察。模拟了$^{26,28}$ Na [1]和本文研究的$^{35}$ Ar的诱导核自旋极化随原子-激光相互作用长度的变化。绝热自旋旋转的自旋极化的原子系综，以及这如何影响所观察到的核系综极化，也进行了相同的核。对于$^{35}$ Ar，我们表明，多频泵浦增强了合奏极化的一个因素1.85，从速率方程模型的预测一致。[1]J. Phys. G：Nucl. Part.物理/ 1744084005
英文摘要：
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 the setup, 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, [1] and for $^{35}$Ar, which is studied in this work. Adiabatic spin rotation 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. [1] J. Phys. G: Nucl. Part. Phys./1744084005
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