https://doi.org/10.1140/epjp/s13360-024-05644-8
Regular Article
Thermal cross section of poly(2-hydroxyethyl methacrylate) hydrogels for neutron dose calculation
1
Department of Physics and NAST Centre, Universitá degli Studi di Roma Tor Vergata, 00133, Rome, Italy
2
National Research Council, Institute of Polymers, Composites and Biomaterials (IPCB), 80078, Naples, Italy
3
Department of Chemistry “Ugo Schiff” & Center for Colloid and Surface Science (CSGI), University of Florence, Via Della Lastruccia, 3, 50019, Firenze, Italy
4
ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, OX110QX, Chilton, UK
5
CNR-ISM, Via del Fosso del Cavaliere 100, 00133, Rome, Italy
j
giovanni.romanelli@uniroma2.it
Received:
25
March
2024
Accepted:
11
September
2024
Published online:
17
October
2024
Phantom materials are used to design radiation safety and protection strategies by means of numerical dose calculation. In the case of thermal neutrons, the radiation transport in the phantom relies on mass attenuation coefficients and total cross sections which are dependent on the physical and chemical properties of the material. Specifically for medical applications, such as neutron capture therapy, the neutron-induced dose is mainly related to the neutron absorption by hydrogen and nitrogen in the human tissue and body. Here, we investigate the use of poly(2-hydroxyethyl methacrylate) as a phantom material by experimental measurement and modeling of its total neutron scattering cross section and mass attenuation coefficient. We show that by varying the hydration level from 10 to 40 w%, one can obtain a neutron attenuation coefficient similar to polymethyl methacrylate or more representative of the human body, respectively. By benchmarking our phenomenological model on the experimental data, we provide a new example of how to use the average functional group approximation to accurately model total neutron cross sections in the framework of personalized medicine approaches.
Guest editors: A. Malizia, M. D’Arienzo, G. M. Contessa, F. d’Errico, S. De Souza Lalic, F. Duschek, V. Vasiliou, T. Hooker, P. Gaudio.
© The Author(s) 2024
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