High-Field-Cryostat for Mössbauer Spectroscopy

申请人小组的科学重点是通过Mössbauer光谱学研究自然界铁中心（铁蛋白）和配位化学（仿生铁配合物，自旋交叉化合物和分子磁体）的功能以及电子和动力学性质。对于生物系统中特别复杂的多核铁中心，如血红素、非血红素和铁硫蛋白的鉴定，高磁场Mössbauer光谱是最合适的方法之一。Mössbauer高磁场中的光谱学在确定铁中心的电子和磁性能方面也起着重要作用。由于2005年4月批准的具有高场低温恒温器的Mössbauer光谱仪，申请人在凯泽斯劳滕工业大学的研究小组使用了这种特殊类型的Mössbauer光谱仪。在装有超导线圈的闭循环He低温恒温器的采购阶段和相应的设置阶段之后，Mössbauer光谱实验可以从2008年开始进行。经过14年的成功运行，该设施已超过其使用寿命。该应用程序的目的是能够在未来更换采购的框架内继续在凯泽斯劳滕工业大学的高磁场中进行Mössbauer光谱分析。

The scientific focus of the applicant's group is the study of the function as well as the electronic and dynamic properties of iron centers in nature (iron proteins) and coordination chemistry (biomimetic iron complexes, spincrossover compounds and molecular magnets) by Mössbauer spectroscopy. For the identification of especially complex polynuclear iron centers in biological systems such as heme, non-heme, and iron-sulfur proteins, Mössbauer spectroscopy in high magnetic fields is one of the most suitable methods. Mössbauer spectroscopy in high magnetic fields also plays an important role in determining electronic and magnetic properties of iron centers. This special type of Mössbauer spectroscopy is operated in the applicant's research group at the TU Kaiserslautern thanks to a Mössbauer spectrometer with high-field cryostat approved in April 2005. After the procurement phase of a closed-cycle He cryostat equipped with a superconducting coil and a corresponding set-up phase, Mössbauer spectroscopic experiments could thus be performed since 2008. After 14 years of successful operation, the facility has exceeded its life time. The purpose of this application is to be able to continue Mössbauer spectroscopy in high magnetic fields at the TU Kaiserslautern in the future within the framework of a replacement procurement.