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Ultra-trace analysis of U and Th in organic liquid scintillators with high sensitivity

Fuente: arXiv

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Bibliographic Details
Main Authors:	Barresi, A., Chiesa, D., Merli, D., Nastasi, M., Nisi, S., Previtali, E., Sisti, M., Borghesi, M., Cammi, A., Coletta, C., Ferrante, G., Loi, L., Andronico, G., Antonelli, V., Basilico, D., Beretta, M., Bergnoli, A., Brigatti, A., Brugnera, R., Bruno, R., Budano, A., Caccianiga, B., Cerrone, V., Caruso, R., Clementi, C., D'Auria, L. V., Dusini, S., Fabbri, A., Felici, G., Garfagnini, A., Giammarchi, M. G., Giudice, N., Gavrikov, A., Grassi, M., Guardone, N., Houria, F., Landini, C., Lastrucci, L., Lippi, I., Lombardi, P., Mantovani, F., Mari, S. M., Martini, A., Miramonti, L., Montuschi, M., Orestano, D., Ortica, F., Paoloni, A., Pelicci, L., Percalli, E., Petrucci, F., Ranucci, G., Re, A. C., Ricci, B., Romani, A., Saggese, P., Serafini, A., Sirignano, C., Stanco, L., Farilla, E. Stanescu, Strati, V., Torri, M. D. C, Tuve', C., Venettacci, C., Verde, G., Votano, L.
Format:	Preprint
Published:	2025
Subjects:	Instrumentation and Detectors
Online Access:	Acceder al recurso
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_version_	1866917135783034880
author	Barresi, A. Chiesa, D. Merli, D. Nastasi, M. Nisi, S. Previtali, E. Sisti, M. Borghesi, M. Cammi, A. Coletta, C. Ferrante, G. Loi, L. Andronico, G. Antonelli, V. Basilico, D. Beretta, M. Bergnoli, A. Brigatti, A. Brugnera, R. Bruno, R. Budano, A. Caccianiga, B. Cerrone, V. Caruso, R. Clementi, C. D'Auria, L. V. Dusini, S. Fabbri, A. Felici, G. Garfagnini, A. Giammarchi, M. G. Giudice, N. Gavrikov, A. Grassi, M. Guardone, N. Houria, F. Landini, C. Lastrucci, L. Lippi, I. Lombardi, P. Mantovani, F. Mari, S. M. Martini, A. Miramonti, L. Montuschi, M. Orestano, D. Ortica, F. Paoloni, A. Pelicci, L. Percalli, E. Petrucci, F. Ranucci, G. Re, A. C. Ricci, B. Romani, A. Saggese, P. Serafini, A. Sirignano, C. Stanco, L. Farilla, E. Stanescu Strati, V. Torri, M. D. C Tuve', C. Venettacci, C. Verde, G. Votano, L.
author_facet	Barresi, A. Chiesa, D. Merli, D. Nastasi, M. Nisi, S. Previtali, E. Sisti, M. Borghesi, M. Cammi, A. Coletta, C. Ferrante, G. Loi, L. Andronico, G. Antonelli, V. Basilico, D. Beretta, M. Bergnoli, A. Brigatti, A. Brugnera, R. Bruno, R. Budano, A. Caccianiga, B. Cerrone, V. Caruso, R. Clementi, C. D'Auria, L. V. Dusini, S. Fabbri, A. Felici, G. Garfagnini, A. Giammarchi, M. G. Giudice, N. Gavrikov, A. Grassi, M. Guardone, N. Houria, F. Landini, C. Lastrucci, L. Lippi, I. Lombardi, P. Mantovani, F. Mari, S. M. Martini, A. Miramonti, L. Montuschi, M. Orestano, D. Ortica, F. Paoloni, A. Pelicci, L. Percalli, E. Petrucci, F. Ranucci, G. Re, A. C. Ricci, B. Romani, A. Saggese, P. Serafini, A. Sirignano, C. Stanco, L. Farilla, E. Stanescu Strati, V. Torri, M. D. C Tuve', C. Venettacci, C. Verde, G. Votano, L.
contents	Rare event searches demand extremely low background levels, necessitating ever-advancing screening techniques to enhance sensitivity. Liquid scintillators are highly attractive as detector media due to their inherent radiopurity and scalability in mass. In this work, we present a screening procedure to measure ultra-trace concentrations of natural contaminants -- $^{238}$U and $^{232}$Th -- with sensitivities at the \qty{E-15}{g/g} level. Our method combines neutron activation analysis with radiochemical techniques, followed by \bg\ coincidence spectroscopy to minimize interference backgrounds. This approach achieves sensitivities of \qty{0.65E-15}{g/g} for $^{238}$U and \qty{2.3E-15}{g/g} for $^{232}$Th, among the best reported worldwide. Potential pathways for further sensitivity improvements are outlined in the conclusions.
format	Preprint
id	arxiv_https___arxiv_org_abs_2512_08988
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Ultra-trace analysis of U and Th in organic liquid scintillators with high sensitivity Barresi, A. Chiesa, D. Merli, D. Nastasi, M. Nisi, S. Previtali, E. Sisti, M. Borghesi, M. Cammi, A. Coletta, C. Ferrante, G. Loi, L. Andronico, G. Antonelli, V. Basilico, D. Beretta, M. Bergnoli, A. Brigatti, A. Brugnera, R. Bruno, R. Budano, A. Caccianiga, B. Cerrone, V. Caruso, R. Clementi, C. D'Auria, L. V. Dusini, S. Fabbri, A. Felici, G. Garfagnini, A. Giammarchi, M. G. Giudice, N. Gavrikov, A. Grassi, M. Guardone, N. Houria, F. Landini, C. Lastrucci, L. Lippi, I. Lombardi, P. Mantovani, F. Mari, S. M. Martini, A. Miramonti, L. Montuschi, M. Orestano, D. Ortica, F. Paoloni, A. Pelicci, L. Percalli, E. Petrucci, F. Ranucci, G. Re, A. C. Ricci, B. Romani, A. Saggese, P. Serafini, A. Sirignano, C. Stanco, L. Farilla, E. Stanescu Strati, V. Torri, M. D. C Tuve', C. Venettacci, C. Verde, G. Votano, L. Instrumentation and Detectors Rare event searches demand extremely low background levels, necessitating ever-advancing screening techniques to enhance sensitivity. Liquid scintillators are highly attractive as detector media due to their inherent radiopurity and scalability in mass. In this work, we present a screening procedure to measure ultra-trace concentrations of natural contaminants -- $^{238}$U and $^{232}$Th -- with sensitivities at the \qty{E-15}{g/g} level. Our method combines neutron activation analysis with radiochemical techniques, followed by \bg\ coincidence spectroscopy to minimize interference backgrounds. This approach achieves sensitivities of \qty{0.65E-15}{g/g} for $^{238}$U and \qty{2.3E-15}{g/g} for $^{232}$Th, among the best reported worldwide. Potential pathways for further sensitivity improvements are outlined in the conclusions.
title	Ultra-trace analysis of U and Th in organic liquid scintillators with high sensitivity
topic	Instrumentation and Detectors
url	https://arxiv.org/abs/2512.08988