2026-06-28T20:34:35Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1245582025-10-07T00:04:08Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Caballero Rodríguez, Miriam author Sánchez Tembleque Verbo, Víctor author Fraile Prieto, Luis Mario author Fonseca Vargas, C. author Gaitán Domínguez, Sara author Kim, H.J. author Martínez Nouvilas, Víctor author Martínez Roig, M. author Nácher, E. author Udías Moinelo, José Manuel author Vuong, P.Q. author 2026-02 We have characterized a detector equipped with an undoped LaCl truncated cone crystal with dimensions of 22.5 mm in the largest diameter, 16 mm in the smallest diameter, and 16 mm in height, coupled to a fast Photonis XP2020/URQ photomultiplier tube (PMT). Its time response at 511 keV (22Na) and 60Co photon energies has been measured against a reference detector using a fast digitizer module by digital signal processing methods based on a genetic algorithm. The time resolution was optimized by the choice of the photomultiplier bias voltage and the fine-tuning of the digital parameters of the time pickup algorithm. The de-convoluted full width at half maximum (FWHM) time resolution is found to be 250 ± 10 ps at 60Co energies, and 444 ± 8 ps using positron annihilation -rays from 22Na, providing good prospects for the use of the crystal in applications requiring a fast time response. Caballero, M., Sánchez-Tembleque, V., Fraile, L.M., Fonseca-Vargas, C., Gaitán, S., Kim, H.J., Martínez-Nouvilas, V., Martínez-Roig, M., Nácher, E., Udías, J.M., Vuong, P.Q., 2026. Time response of an undoped LaCl 3 crystal. Radiation Physics and Chemistry 239, 113239. https://doi.org/10.1016/j.radphyschem.2025.113239 0969-806X 10.1016/j.radphyschem.2025.113239 https://hdl.handle.net/20.500.14352/124558 1879-0895 https://doi.org/10.1016/j.radphyschem.2025.113239 https://www.sciencedirect.com/science/article/pii/S0969806X25007315?via%3Dihub Time response of an undoped LaCl3 crystal