碘化氘的UV解离产生的高自旋极化氘原子
Highly spin-polarized deuterium atoms from the UV dissociation of Deuterium Iodide
摘要：
我们报道了碘化氘在270 nm处的光解产生高自旋极化的氘原子。氘和碘的光解产物的速度分布是通过速度映射切片成像。此外，角动量极化的碘产品进行了研究，使用偏振敏感电离计划。结果与$A^1Π_1$态的激发和随后的绝热解离一致。该过程在解离时产生$\sim$ 100\%电子极化氘原子，然后在$\sim 1.6$ ns后转化为$\sim 60\%$核D极化。超极化氘的这些生产时间允许$\sim 10^{18}$ cm $^{-3}$的碰撞限制密度，其比常规（Stern-Gerlach分离）方法高$\sim 10^6$倍。我们讨论了如何将这种高密度超极化氘原子与激光聚变相结合来测量极化D-D聚变截面。
英文摘要：
We report the production of highly spin-polarized Deuterium atoms via photodissociation of deuterium iodide at 270 nm. The velocity distribution of both the deuterium and iodine photodissociation products is performed via velocity mapping slice-imaging. Additionally, the angular momentum polarization of the iodine products is studied using polarization-sensitive ionization schemes. The results are consistent with excitation of the $A^1Π_1$ state followed by adiabatic dissociation. The process produces $\sim$100\% electronically polarized deuterium atoms at the time of dissociation, which is then converted to $\sim 60\%$ nuclear D polarization after $\sim 1.6$ ns. These production times for hyperpolarized deuterium allow collision-limited densities of $\sim 10^{18}$ cm$^{-3}$, which is $\sim 10^6$ times higher than conventional (Stern-Gerlach separation) methods. We discuss how such high-density hyperpolarized deuterium atoms can be combined with laser fusion to measure polarized D-D fusion cross sections.
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