Space and time reversal symmetry violation in neutron optics

中子光学中的空间和时间反演对称性破坏

• 批准号: 09044105
• 负责人: ADACHI T.
• 金额: $ 3.46万
• 依托单位: High Energy Accelerator Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09044105/
• 关键词: parity violation; time reversal; weak interaction; neutron polarization; nuclear polarization; laser optical pumping; NMR; 空間反転; 中性子; 時間反転対称性; 超伝導; ヘリウム3偏極

We established the experimental method of T-violating polarized neutron transmission through a polarized nuclear target. We found systematic errors are cancelled, if we apply the reciprocity theorem of Goldberger and Watson. We developed a new method for 3He polarization as neutron spin polarizer and analyzer, namely we developed 3He polarization in a birefringence sapphire cell.We developed neutron polarimetty by using 3He neutron spin polarizer and analyzer and a Meisner sheet. We carried out an experiment on parity violating neutron spin rotation by applying the neutron polarimeter at Los Alamos. We also carried out the study of parity violation on polarized neutron transmission through nuclear targets.We developed an experiment on parity violating neutron radiative capture of proton for the study of the weak interaction between nucleons. We developed a 3He neutron-polarizer of large aperture, a new radio-frequency neutron-spin flipper, a low neutron absorption vessel of liquid hydrogen made from zirconium and a high magnetic-resistant photo multiplier for this experiment. We carried out a preliminary experiment at Los Alamos.

建立了极化中子穿透极化核靶的T破坏实验方法。我们发现，如果我们应用Goldberger和沃森的互易定理，系统误差被抵消。我们发展了一种新的3 He极化方法，即在双折射蓝宝石盒中进行3 He极化，用3 He中子自旋极化器和中子自旋分析器以及迈斯纳片进行中子极化。我们在洛斯阿拉莫斯实验室用中子偏振计进行了中子自旋宇称破坏实验。我们还开展了极化中子穿过核靶的宇称破缺研究，并为研究核子间弱相互作用发展了质子辐射俘获宇称破缺中子实验。我们研制了大口径~ 3 He中子极化器、新型射频中子自旋翻转器、锆液氢低中子吸收容器和高磁阻光电倍增管。我们在洛斯阿拉莫斯进行了初步实验。

项目成果

E.I. Sharapov et.al.: "Search for parity violation in ^<93>Nb neutron ressonances" Phys.Rev.C. C59. 1131-1135 (1999)

E.I.

Y.Masuda: "P,T violating neutron-nucleus interaction and 3He polarization" Nucl.Instr.Meth.A402. (1998)

Y.Masuda：“P、T 破坏中子-核相互作用和 3He 极化”Nucl.Instr.Meth.A402。

L.Y.Lowie et al.: "Parity violation in neutron resonance in 107,109Ag" Phus.Rev.C59. (1999)

L.Y.Lowie 等人：“107,109Ag 中子共振中的宇称不守恒”Phus.Rev.C59。

増田康博: "T Violation in Neutron Induced Reaction and Reciprocity Theorem" Nuclear Physics. A629. 479c-483c (1998)

Yasuhiro Masuda：“中子诱发反应中的 T 违反和互易定理”核物理 A629c-483c (1998)。

Y.Masuda: "T Vidation in Neutron Induced Reaction and Reciprocity Theorem" Nuelear Physics. A629. 479c-483c (1998)

Y.Masuda：“中子诱发反应中的 T Vidation 和互易定理”核物理。