High-Field-Cryostat for Mössbauer Spectroscopy

申请者小组的科学重点是利用穆斯堡尔光谱学研究自然界(铁蛋白质)和配位化学(仿生铁配合物、自旋交叉化合物和分子磁体)中铁中心的功能以及电子和动力学性质。强磁场下的穆斯堡尔谱学是鉴定生物体系中特别复杂的多核铁中心的最合适的方法之一。强磁场下的穆斯堡尔谱学在确定铁中心的电子和磁性方面也起着重要作用。这一特殊类型的穆斯堡尔光谱学是在2005年4月获得批准的高场低温穆斯堡尔光谱仪的帮助下，在申请者位于德国凯泽斯劳滕大学的研究小组中运行的。在配备了超导线圈和相应设置阶段的闭合循环He低温恒温器的采购阶段之后，可以从2008年开始进行穆斯堡尔光谱实验。经过14年的成功运营，该设施已经超过了其使用寿命。这项应用的目的是能够在未来更换采购的框架内继续在TU Kaiserslautern的高磁场下进行穆斯堡尔光谱分析。

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.