[The decomposition of the EPR spectra of multicomponent systems irradiated at 77 K into paramagnetic center signals of different natures].

D A Svistunenko
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Abstract

Main principles of the way to decompose an EPR spectrum of a multicomponent system, irradiated at 77 K, into separate radiation-induced paramagnetic centre signals are given. The decomposition is possible due to the computer assistant spectra processing, and is based on different properties of different paramagnetic centres, namely, on different thermostability of the centres, on different rate of relaxation, and on different photosensitivity. Concrete examples of the EPR spectrum decomposition into different free radical signals are given for cases of murine liver and spleen irradiated at 77 K. Radiochemical yields of different free radicals, induced by gamma radiation at 77 K in whole biological tissues, were defined. The data on nature and properties of the paramagnetic centres induced by radiation in biological tissues are shortly reviewed.

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[77 K辐照下多组分体系的EPR谱分解成不同性质的顺磁中心信号]。
给出了将77 K辐照下多组分系统的EPR谱分解为单独的辐射诱导顺磁中心信号的主要原理。由于计算机辅助光谱处理,分解是可能的,并且是基于不同顺磁中心的不同性质,即不同的中心的热稳定性,不同的弛豫速率和不同的光敏性。给出了小鼠肝脏和脾脏在77 K辐照下EPR谱分解为不同自由基信号的具体例子。测定了77 K γ辐射诱导的全生物组织中不同自由基的放射化学产率。简要回顾了辐射在生物组织中诱导的顺磁中心的性质和性质。
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