High-precision measurement of $^{215}$Po half-life via delayed-coincidence analysis
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866915800319787008 |
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| author | Ascenzo, Lorenzo Baiocchi, Melissa Hoda Benato, Giovanni Chu, Yingjie Di Carlo, Giuseppe Molinario, Andrea Vernetto, Silvia |
| author_facet | Ascenzo, Lorenzo Baiocchi, Melissa Hoda Benato, Giovanni Chu, Yingjie Di Carlo, Giuseppe Molinario, Andrea Vernetto, Silvia |
| contents | We performed a high-precision study of the $^{215}$ Po $α$-decay using a LaBr$_3$ scintillating detector in a low-background environment. The $^{227}$Ac intrinsic contamination in the LaBr$_3$ crystal undergoes a decay chain, producing the intermediate pair of $^{219}$Rn$\rightarrow^{215}$Po$\rightarrow^{211}$Pb decays. The fast time response and good energy resolution of the detector allow for extracting the short half-life of $^{215}$Po from the time correlation of the two subsequent $α$-decays by using the delayed coincidence method. Thanks to high statistics and a comprehensive uncertainty assessment, we obtain the most precise half-life value to date of $^{215}$Po, corresponding to $1.77804\pm0.00091$(stat.)$\pm0.00067$(syst.) ms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_14829 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-precision measurement of $^{215}$Po half-life via delayed-coincidence analysis Ascenzo, Lorenzo Baiocchi, Melissa Hoda Benato, Giovanni Chu, Yingjie Di Carlo, Giuseppe Molinario, Andrea Vernetto, Silvia Nuclear Experiment We performed a high-precision study of the $^{215}$ Po $α$-decay using a LaBr$_3$ scintillating detector in a low-background environment. The $^{227}$Ac intrinsic contamination in the LaBr$_3$ crystal undergoes a decay chain, producing the intermediate pair of $^{219}$Rn$\rightarrow^{215}$Po$\rightarrow^{211}$Pb decays. The fast time response and good energy resolution of the detector allow for extracting the short half-life of $^{215}$Po from the time correlation of the two subsequent $α$-decays by using the delayed coincidence method. Thanks to high statistics and a comprehensive uncertainty assessment, we obtain the most precise half-life value to date of $^{215}$Po, corresponding to $1.77804\pm0.00091$(stat.)$\pm0.00067$(syst.) ms. |
| title | High-precision measurement of $^{215}$Po half-life via delayed-coincidence analysis |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2602.14829 |