Establishment of the New Nuclear Quadrupole Resonance Technique (by Means of Asymmetric β Decay)

我们将新的核四极共振技术（由不对称β衰变的含义）引入实际用途，并将核自旋的人工操作引入核磁性共振技术（由自旋极化的短寿命存活的核）。（1）我们开发了许多相对光β-核磁共振探测器核。The nuclear spins of y D18，12 y D1B，y D19 y D1C，y D112，16 y D1N，y D113 y D1O，y D120，21 y D1F，y D123 y D1Mg，y D127 y D1Si，y D135 y D1Ar，y D139 y D1Ca， were successfully polarized in high energy projectile fragmentation process， by selecting emission angle of the fragments。在添加中，我们研究了在低能量核反应中的核自旋极化机制，在D120中的核核自旋极化机制，在D119中，D1 O，在D18中的核D1 Li，在低能量核反应中确定了这些极化探针的最佳条件。（2）我们为实际使用提供了新的核四极共振技术。我们开发了一种高效的核四极R。 ... More 共振和核自旋的人工操纵，通过应用射频磁场在核磁共振频率下分裂在四极相互作用下。为了验证这一技术，我们推出了一个高速调谐系统，由真空电容器的开关。我们将此技术应用于D112-D1 B（nuclear spin I = 1），イイD123イエD1Mg，イイD135イエD1Ar，イイD139イエD1Ca （I = 3/2），イイD18イエD1B，イイD116イエD1N （I = 2），イイD119イエD1O，イイD121イエD1F，イD127イエD1Si （I = 5/2），D141 D1Sc （I = 7/2）。（3）我们选择了晶体内部的电场梯度和电子结构。比较实验性电场梯度和电子带结构的第一原则计算，我们找到了对不理想和地方晶格放松的电荷状态的重要性。（4）开发的核自旋操纵技术已应用于核自旋极化和对齐之间的相互转换。We succeeded in the production of nuclear spin alignment in y D18 y D1B，y D120 y D1F， and y D141 y D1Sc， and Observed the alignment correlation terms in β-ray angular distributions precisely。Less（低）

We put the new nuclear quadrupole resonance technique (by means of asymmetric β decay) to practical use, introducing artificial manipulation of the nuclear spin into the nuclear magnetic resonance technique by means of asymmetric β decay (β-NMR) on the spin polarized short lived nuclei.(1) We developed many kinds of relatively light β-NMR probe nuclei. The nuclear spins of ィイD18,12ィエD1B, ィイD19ィエD1C, ィイD112,16ィエD1N, ィイD113ィエD1O, ィイD120,21ィエD1F, ィイD123ィエD1Mg, ィイD127ィエD1Si, ィイD135ィエD1Ar, ィイD139ィエD1Ca, were successfully polarized in high energy projectile fragmentation process, by selecting emission angle of the fragments. In addition, we investigated the nuclear spin polarization mechanism of ィイD120ィエD1F, ィイD119ィエD1O, ィイD18ィエD1Li, ィイD116ィエD1N in low energy nuclear reactions, and determined the optimum condition of the production of these polarized probe nuclei.(2) We put the new nuclear quadrupole resonance technique to practical use. We developed the highly efficient nuclear quadrupole r … More esonance and the artificial manipulation of nuclear spin, by applying rf magnetic fields on the NMR resonance frequencies split under the quadrupole interaction. To realize this technique, we introduced the high speed tuning system by the switching of the vacuum capacitors. We applied this technique to the ィイD112ィエD1B (nuclear spin I = 1), ィイD123ィエD1Mg, ィイD135ィエD1Ar, ィイD139ィエD1Ca (I = 3/2), ィイD18ィエD1B, ィイD116ィエD1N (I = 2), ィイD119ィエD1O, ィイD121ィエD1F, ィイD127ィエD1Si (I = 5/2), and ィイD141ィエD1Sc (I = 7/2).(3) We elucidated the electric field gradients and the electronic structures inside crystals. Comparing experimental electric field gradients and the first principle calculations of the electron band structure, we found the importance of the charge state of the impurities and local lattice relaxation.(4) Thus developed nuclear spin manipulation technique was applied to the mutual conversion between nuclear spin polarization and alignment. We succeeded in the production of nuclear spin alignment in ィイD18ィエD1B, ィイD120ィエD1F, and ィイD141ィエD1Sc, and observed the alignment correlation terms in β-ray angular distributions precisely. Less