论文标题
珠子的偏振依赖性激光共振电离电离
Polarization-dependent laser resonance ionization of beryllium
论文作者
论文摘要
使用TriumF的离线激光离子源测试架和可调钛蓝宝石激光器系统，已经使用铍进行了激光共振电离的极化依赖性。对激发路径$^1 $ s $ _0 $ _0 $ _0 $$^1 $ p $^{\ circ} _1 $$ \ rightArrow $ s $ s $ _0 $观察到了显着的两极化依赖性，这是碱性和碱性元素的典型过渡。这种极化依赖性在Triumf同位素分离器和加速器设施（ISAC）的放射性同位素上得到了进一步验证。事实证明，激光极化是工作共振电离激光离子源（RILIS）的重要参数。 两极分化光谱均在2p $^2 $ $^1 $ s $ _0 $自动授权（AI）状态和高$ N $ rydberg状态的2p $^2 $^1 $^1 $^1 $^1 $^1 $^1 $^1 $^1 $ n $ rydberg州的状态下，$ 2SNS $ $^1S_0 $和$ 2SND $ $^1d_2 $系列都在脱离线。 2p $^2 $ $^1 $ S $ _0 $ ai状态和铍的电离电位（IP）的能量被提取为76167（6）〜cm $ $^{ - 1} $和75192.59（3）〜cm $^{ - 1} $。极化光谱可用于确定复合/放射性碱性元素（例如RA，SM，SM，YB，PU和No.）中新发现状态的$ J $值。
Using TRIUMF's off-line laser ion source test stand with a system of tunable titanium sapphire lasers, the polarization dependence of laser resonance ionization has been investigated using beryllium. A significant polarization dependence was observed for the excitation path $^1$S$_0$$\rightarrow$$^1$P$^{\circ}_1$$\rightarrow$$^1$S$_0$, which are typical transitions for alkaline and alkaline-like elements. This polarization dependence was further verified on Be radioactive isotopes at TRIUMF's isotope separator and accelerator facility (ISAC). Laser polarization was proven to be an important parameter in operating resonance ionization laser ion sources (RILIS). The polarization spectroscopy was preformed off-line both on the 2p$^2$ $^1$S$_0$ autoionizing (AI) state and high-$n$ Rydberg states of the $2sns$ $^1S_0$ and $2snd$ $^1D_2$ series. The energy of the 2p$^2$ $^1$S$_0$ AI state and ionization potential (IP) of beryllium were extracted as 76167(6)~cm$^{-1}$ and 75192.59(3)~cm$^{-1}$. Polarization spectroscopy can be used to determine the $J$ values of newly found states in in-source spectroscopy of the complex/radioactive alkaline-like elements such as Ra, Sm, Yb, Pu and No.
