Nuclear Matter Density Dependences of Non-Nucleonic Degrees of Freedom

我们建立了不稳定核的产生技术，发展了自旋控制技术，确定了不稳定核的磁矩和四极矩，相互作用截面，最终确定了镜像β衰变中弱核子流中的感生张量项和轴向电荷。1.系统地研究了高能重离子碰撞中由射弹碎裂过程产生的^&lt;8，12&gt;B、^&lt;12，16&gt;N、^&lt;13，19&gt;O、^&lt;20，21&gt;F、^<23>Mg、^<27>Si、^<35>Ar和^<39>Ca的核自旋极化。这些研究阐明了重离子碰撞中的极化机制，有助于我们建立极化放射性核束技术。2我们测定了^&lt;12，16&gt;N，^&lt;13，19&gt;O，^<21>F，^<27>Si，^<39>Ca和^<41>Sc的电四极矩，并得到了这些核中核子密度分布的信息。 关于我们 研究所需的电场梯度（EFG）已通过电子能带结构计算的框架中的KKR方法。从富质子的Ti^O_2中的^ O等核的FT-NMR实验上确定了TiO_2晶体中的EFG<17><17>。3通过对极富质子核^9 C和^ O的磁矩的精确测量，发现了^9 C中异常大的自旋期望值<13>。这可能暗示了核中g因子的重要重整化，这与夸克禁闭机制有关。4相互作用截面和^8B、^<12>N、^9 C、^<13>O和^<17>Ne的碎片动量分布已经被精确测量。从这些实验数据中，确定了这些核中的核子密度分布。[5]发展了一种新的自旋控制技术，并精确地测量了质量为A = 12的镜像β衰变（^<12>B和^<12>N）的核排列项。通过测量，确定了G宇称非正则诱导张量项的精确上限。同样的数据揭示了弱核子流中异常大的轴向电荷，这是核中核子质量重整化（核子质量淬灭）的可靠证据。少

We established the technique of the production of unstable nuclei, developed the spin control technique, determined the magnetic moments and the quadrupole moments of unstable nuclei, the interaction cross-sections, and finally determined the induced tensor term and the axial charge in the weak nucleon currents in the mirror beta decays. From these results,of the present stydy can be summarized as follows.1 Nuclear spin polarizations of ^<8, 12>B, ^9C, ^<12, 16>N, ^<13, 19>O, ^<20, 21>F, ^<23>Mg, ^<27>Si, ^<35>Ar and ^<39>Ca produced through the projectile fragmentation process in hegh energy heavy ion collisions have been studied systematically. These studies made clear the polarization mechanism in heavy ion collisions and helped us to establish the polarized radioactive nuclear beam techniques.2 We have determined the electric quadrupole moments of ^<12, 16>N, ^<13, 19>O, ^<21>F, ^<27>Si, ^<39>Ca and ^<41>Sc, and got information on the nucleon density distributions in these nuclei. … More The electric field gradients (EFG) necessary for the studies have been given through electron band structure calculations in the framework of the KKR method. EFGs in the TiO_2crystal have been determined experimentally from the FT-NMR of the nuclei such as ^<17>O in the enriched Ti^<17>O_2.3 Abnormally large spin expectation value in ^9C has been found, from the precise measurement of the magnetic moments of the extremely proton-rich nuclei ^9C and ^<13>O. This may suggest the signigicant renormalization of the g-factors in the nucleus, which is connected with the quark confinement mechanism.4 Interaction cross-sections and the fragment momentum distributions of ^8B, ^<12>N, ^9C, ^<13>O and ^<17>Ne have been precisely measured. From these experimental data, nucleon density distributions in these nuclei were determined.5 A new technique of spin control has been developed, and the nuclear alignment terms have been precisely measured for mass A = 12 mirror beta decays )^<12>B and ^<12>N). From the measurement, precise upper limit of the G-parity irregular induced tensor term was determined. The same data revealed the abnormally large axial charge in the weak nucleon currents, which is the reliable evidence of the renormalization of the nucleon mass (quenching of the nucleon mass) in the nucleus. Less