Development of in-beam Mossbauer spectroscopy without utilizing the Doppler effect

不利用多普勒效应开发束内穆斯堡尔光谱

• 批准号: 13640376
• 负责人: KOBOYASHI Yoshio
• 金额: $ 2.18万
• 依托单位: RIKEN (The Institute of Physical and Chemical Research)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640376/
• 关键词: materials science; Mossbauer spectroscopy; Doppler effect; Zeeman splitting; magnetic modulation; in-beam Mossbauer spectroscopy; giant magnetic moment; short-lived unstable nuclei; 物資科学研究; 磁気モーメント; インビーム・メスバウアー分光

All of the Mossbauer spectra have been measured by using the Doppler modulation since the discovery of the Mossbauer effect. The Doppler moduration technique has contributed to the establishment of the Mossbauer spectoscopy as one of the most valuable experimental tools in the fields of not only the nuclear physics but also solid state chemistry. However, we should observe the Mossbauer resonance, if the Mossbauer energy level of source unclide is made to hyperfine split under applied external magnetic field and the energy of the emitted gamma-ray is equivalent to one of the energy difference between the excited and ground states of an absorber. In this research, we have developed the new measuring system under strong magnetic field without utilizing the Doppler effect in order to apply to the in-beam Mossbauer spectroscopy for magnetism investigations.(1) Production of the Mossbauer gamma-rays detector (parallel Plate Avalanche Counter) and evaluation of the performance(2) Evaluation of the cryostat with a superconducting solenoid magnet(3)Measurement of the Mossbauer spectrum with magnetic modulation

自从穆斯堡尔效应被发现以来，所有的穆斯堡尔谱都是用多普勒调制测量的。穆斯堡尔谱学的发展，使穆斯堡尔谱成为核物理和固体化学领域中最有价值的实验工具之一。但如果在外加磁场作用下，使源能级发生超精细分裂，发射出的γ射线能量相当于吸收体激发态与基态能量之差，则应观察到穆斯堡尔共振。在本研究中，我们开发了一种不利用多普勒效应的强磁场下的新测量系统，以应用于在束穆斯堡尔谱的磁性研究。(1)穆斯堡尔γ射线探测器（平行板雪崩计数器）的制作和性能评价（2）超导螺线管磁体低温恒温器的评价（3）磁调制穆斯堡尔谱的测量

项目成果

Y. Kobayashi et al.: "In-beam Mossbauer Study of ^<57>Fe Spesies Arising From ^<57>Mn Implanted into KMnO_4"Hyperfine Interactions. (in press).

Y. Kobayashi 等人：“来自 ^<57>Mn 植入 KMnO_4 中的 ^<57>Fe 物种的束内穆斯堡尔研究”超精细相互作用。

T.Saito et al.: "Development and Application of Parallel-Plate Avalanche Counter for In-beam Mossbauer Spectroscopy"Journal of Radioanalytical and Nuclear Chemistry. (in press). (2003)

T.Saito 等人：“束内穆斯堡尔光谱的平行板雪崩计数器的开发和应用”放射分析与核化学杂志。

Y.Kobayashi et al.: "In-beam Mossbauer Study of ^<57>Fe Using a Secondary ^<57>Mn Beam and Ion Implantation"The European Physical Journal. A13. 243-246 (2002)

Y.Kobayashi等人：“使用二次^ 57 > Mn束和离子注入对^ 57 > Fe的束内穆斯堡尔研究”欧洲物理杂志。

Y. Kobayashi et al.: "In-beam Mossbauer Study of ^<57>Fe Using a Secondary ^<57>Mn Beam and Ion Implantation"The European Physical Journal. A13. 243-246 (2002)

Y. Kobayashi等人：“使用二次^ 57 > Mn束和离子注入对^ 57 > Fe的束内穆斯堡尔研究”，欧洲物理杂志。

T.Saito et al.: "Development and Application of Parallel-Plate Avalanche Counter for In-beam Mossbauer Spectroscopy"Journal of Radioanalytical and Nuclear Chemistry. 255・3. 519-522 (2003)

T. Saito 等：“束内穆斯堡尔光谱的平行板雪崩计数器的开发和应用”《放射分析与核化学杂志》255・3（2003 年）。