Abstract
The modelling of γ heating and neutron damage inside a nuclear reactor is essential to design the next generation of nuclear reactors. The determination of the fission fragment momentum is a key element to perform accurate calculations of the γ heating. One way to assess this information is to look at the isomeric ratio of different nuclei. According to the lifetime of the isomeric state, different experimental techniques were developed at the LOHENGRIN spectrometer. A focus on the measurement of isomeric ratios of 136I in neutron induced fission of 241Pu is presented. A discussion with the current assumptions used in the evaluation process for isomeric ratio is also shown.
Highlights
Seven decades ago, nuclear fission was discovered [1, 2]
This quantity is major for the determination of the prompt γ spectra which are essential in the calculation of γ heating and damage of nuclear reactor components [3]
One probe to study fission fragment angular momentum is to look at isomeric ratio (IR) [4,5,6]
Summary
Even though the understanding of fission has improved over all these decades, some aspects such as the fission fragment angular momentum were barely studied. Today, this quantity is major for the determination of the prompt γ spectra which are essential in the calculation of γ heating and damage of nuclear reactor components [3]. One probe to study fission fragment angular momentum is to look at isomeric ratio (IR) [4,5,6]. The validation of the assumptions used in the modelling of fission fragment angular momentum in the evaluation process is discussed
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