Measuring the nuclear charge of fission fragments using a large ionization chamber¡ªpart of the double-arm time-of-flight spectrometer

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• 作者：A. N. Tyukavkin ; Yu. V. Pyatkov ; D. V. Kamanin ; Yu. N. Kopatch ; A. A. Alexandrov ; I. A. Alexandrova ; S. B. Borzakov ; Yu. N. Voronov ; S. V. Denisov and G. L. Efimov ; et al.
• 关键词：PACS numbers 29.85. ; c ; 29.40.Cs ; 25.85.Ec
• 刊名：Instruments and Experimental Techniques
• 出版年：2009
• 出版时间：July, 2009
• 年：2009
• 卷：52
• 期：4
• 页码：508-518
• 全文大小：280.0 KB

文摘

Identification of decay products is a relevant task in studying rare collinear decays of low excited heavy nuclei. A technique for measuring the nuclear charge of decay products detected by a wide-aperture ionization chamber—a part of the double-arm time-of-flight spectrometer—is described. Two versions of nuclear charge calibration using data of the reaction 235U(n <sub>thsub>, f) have been developed to determine the charge of the decay products. Testing with simulation data shows that the use of charge parameterization based on the Bohr-Willer empirical equation in the calibration procedure makes it possible to determine the nuclear charge of the fission fragments over a wide energy range. The charges of light ions from He to C, predicted on the basis of this approach, appear to be overestimated by two charge units.