Institute of Electronic Structure and Lasers, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece.
Department of Physics, University of Crete, 70013 Heraklion-Crete, Greece.
Phys Rev Lett. 2018 Aug 24;121(8):083001. doi: 10.1103/PhysRevLett.121.083001.
We measure nuclear and electron spin-polarized H and D densities of at least 10^{19} cm^{-3} with ∼10 ns lifetimes, from the photodissociation of HBr and DI with circularly polarized UV light pulses. This density is ∼6 orders of magnitude higher than that produced by conventional continuous-production methods and, surprisingly, at least 100 times higher than expected densities for this photodissociation method. We observe the hyperfine quantum beating of the H and D magnetization with a pickup coil, i.e., the respective 0.7 and 3 ns periodic transfer of polarization from the electrons to the nuclei and back. The 10^{19} cm^{-3} spin-polarized H and D density is sufficient for laser-driven ion acceleration of spin-polarized electrons, protons, or deuterons, the preparation of nuclear-spin-polarized molecules, and the demonstration of spin-polarized D-T or D-^{3}He laser fusion, for which a reactivity enhancement of ∼50% is expected.
我们使用圆偏振紫外光脉冲，从 HBr 和 DI 的光解作用中测量到至少 10^{19} cm^{-3}、具有 ∼10 ns 寿命的核自旋和电子自旋极化 H 和 D 密度，其密度比传统连续产生方法高约 6 个数量级，令人惊讶的是，其密度比这种光解方法预期的密度至少高 100 倍。我们使用拾波线圈观察 H 和 D 磁化强度的超精细量子拍频，即电子到原子核和再回到原子核的极化分别以 0.7 和 3 ns 的周期进行转移。10^{19} cm^{-3}的自旋极化 H 和 D 密度足以进行激光驱动的自旋极化电子、质子或氘离子的离子加速、核自旋极化分子的制备以及自旋极化 D-T 或 D-^{3}He 激光聚变的演示，预计其反应性增强约 50%。
