Determination of X- and gamma-ray emission intensities in the decay of $^{123}$I and $^{177}$Lu
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| Názov: | Determination of X- and gamma-ray emission intensities in the decay of $^{123}$I and $^{177}$Lu |
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| Autori: | Lépy, Marie-Christine, Boyer, Bruno, Pierre, Sylvie, Utepov, Ablaihan, Bobin, Christophe, Chambon, Lucille |
| Prispievatelia: | Laboratoire National Henri Becquerel (CEA, LIST) (LNHB (CEA, LIST)), Département d'instrumentation Numérique (CEA, LIST) (DIN (CEA, LIST)), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire national de métrologie et d'essais |
| Zdroj: | ISSN: 0969-8043. |
| Informácie o vydavateľovi: | CCSD Elsevier |
| Rok vydania: | 2025 |
| Predmety: | gamma-rays, X-rays, beta particles, Hf-177, instrumentation, nuclear instrumentation, detector, germanium detector, gamma spectrometry, electron capture, I-123, Decay data measurement, ionizing radiation, radioactivity, Lu-177, calibration, reference source, photons, liquid scintillation counting, triple to double coincidence ratio (TDCR), spectrometry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] |
| Popis: | International audience ; I-123 (T1/2 = 13.2234(37) h) decays by electron capture mainly via the 159 keV level of Te-123 (97 %) and is characterized by strong gamma-ray emission at 159.0 keV, as well as intense tellurium K X-rays and numerous low-intensity gamma-rays with energies up to 1 MeV. Lu-177 (T1/2 = 6.647(4) d) decays by beta-emission to the ground state and to three excited levels of Hf-177. Its main photon emissions are the hafnium K X-rays and gamma-rays at 112.9 keV and 208.4 keV; four minor gamma-rays are also emitted. The measurement of photon emission intensities was performed using four N-type high-purity germanium detectors accurately calibrated using standard point sources, in complementary energy ranges. For each radionuclide, several point sources were prepared and checked for homogeneity. For 123I, the study was carried out in two stages.Here, only relative photon emission intensities for about 30 energies could be measured, with relative combined standard uncertainties of about 1 % for the largest ones and of about 2 %–2.5 % for ten minor lines. For 177Lu, the sources were measured in the calibration conditions (at the reference distance) to derive absolute photon emission intensities, thanks to accurate sources activity, obtained by a primary method (4π β-γ coincidences using a liquid scintillation detector in the β channel). The six absolute gamma-ray emission intensities are obtained with relative combined standard uncertainties between 0.7 % and 1.9 %. The whole measurement procedure is presented and the resulting photon emission intensities are compared with previously published values. |
| Druh dokumentu: | article in journal/newspaper |
| Jazyk: | English |
| DOI: | 10.1016/j.apradiso.2025.112212 |
| Dostupnosť: | https://cea.hal.science/cea-05352219 https://cea.hal.science/cea-05352219v1/document https://cea.hal.science/cea-05352219v1/file/article_MCLepy_ARI2025.pdf https://doi.org/10.1016/j.apradiso.2025.112212 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Prístupové číslo: | edsbas.829E8950 |
| Databáza: | BASE |
Nájsť tento článok vo Web of Science | Abstrakt: | International audience ; I-123 (T1/2 = 13.2234(37) h) decays by electron capture mainly via the 159 keV level of Te-123 (97 %) and is characterized by strong gamma-ray emission at 159.0 keV, as well as intense tellurium K X-rays and numerous low-intensity gamma-rays with energies up to 1 MeV. Lu-177 (T1/2 = 6.647(4) d) decays by beta-emission to the ground state and to three excited levels of Hf-177. Its main photon emissions are the hafnium K X-rays and gamma-rays at 112.9 keV and 208.4 keV; four minor gamma-rays are also emitted. The measurement of photon emission intensities was performed using four N-type high-purity germanium detectors accurately calibrated using standard point sources, in complementary energy ranges. For each radionuclide, several point sources were prepared and checked for homogeneity. For 123I, the study was carried out in two stages.Here, only relative photon emission intensities for about 30 energies could be measured, with relative combined standard uncertainties of about 1 % for the largest ones and of about 2 %–2.5 % for ten minor lines. For 177Lu, the sources were measured in the calibration conditions (at the reference distance) to derive absolute photon emission intensities, thanks to accurate sources activity, obtained by a primary method (4π β-γ coincidences using a liquid scintillation detector in the β channel). The six absolute gamma-ray emission intensities are obtained with relative combined standard uncertainties between 0.7 % and 1.9 %. The whole measurement procedure is presented and the resulting photon emission intensities are compared with previously published values. |
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| DOI: | 10.1016/j.apradiso.2025.112212 |