Performance evaluation of GYGAG crystals for neutrinoless double beta decay search
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2026
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| _version_ | 1866911724671598592 |
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| author | Hayasaki, Hibiki Hosokawa, Keishi Ichimura, Koichi Kurosawa, Shunsuke Masaki, Yuta Mizuno, Yusuke Nakajima, Yasuhiro Sekiya, Hiroyuki Yamaji, Akihiro |
| author_facet | Hayasaki, Hibiki Hosokawa, Keishi Ichimura, Koichi Kurosawa, Shunsuke Masaki, Yuta Mizuno, Yusuke Nakajima, Yasuhiro Sekiya, Hiroyuki Yamaji, Akihiro |
| contents | Neutrinoless double beta decay (0$νββ$) is a crucial for confirming neutrinos' Majorana characteristics. Previous searches for 0$νββ$ decay of $^{160}$Gd using GSO crystals was conducted, but the sensitivity was limited by background $α$-rays from radioactive impurities. To distinguish the backgrounds, PSD (Pulse Shape Discrimination) and energy resolution are essential. GAGG (Gd$_{3}$(Al, Ga)$_5$O$_{12}$) is a $^{160}$Gd-containing crystal that exhibits a higher light yield than GSO and excellent PSD capabilities. GYGAG (Gd$_{3-x}$Y$_x$(Al, Ga)$_5$O$_{12}$) is a variant crystal where a portion of Gd is substituted with Yttrium and can have enhanced light yield, motivating its investigation for 0$νββ$ decay searches. In this study, GYGAG crystals with different Yttrium concentrations were fabricated and their energy resolution, pulse shape discrimination capability between $α$ and $γ$ rays, and scintillation timing characteristics were evaluated for applications in 0$νββ$ decay searches. Y substitution enhanced the light yield, and the best energy resolution was achieved for Gd$_{2.5}$Y$_{0.5}$Al$_2$Ga$_3$O$_{12}$. GYGAG exhibited high pulse shape discrimination performance across various yttrium concentrations. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_28414 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Performance evaluation of GYGAG crystals for neutrinoless double beta decay search Hayasaki, Hibiki Hosokawa, Keishi Ichimura, Koichi Kurosawa, Shunsuke Masaki, Yuta Mizuno, Yusuke Nakajima, Yasuhiro Sekiya, Hiroyuki Yamaji, Akihiro Instrumentation and Detectors Nuclear Experiment Neutrinoless double beta decay (0$νββ$) is a crucial for confirming neutrinos' Majorana characteristics. Previous searches for 0$νββ$ decay of $^{160}$Gd using GSO crystals was conducted, but the sensitivity was limited by background $α$-rays from radioactive impurities. To distinguish the backgrounds, PSD (Pulse Shape Discrimination) and energy resolution are essential. GAGG (Gd$_{3}$(Al, Ga)$_5$O$_{12}$) is a $^{160}$Gd-containing crystal that exhibits a higher light yield than GSO and excellent PSD capabilities. GYGAG (Gd$_{3-x}$Y$_x$(Al, Ga)$_5$O$_{12}$) is a variant crystal where a portion of Gd is substituted with Yttrium and can have enhanced light yield, motivating its investigation for 0$νββ$ decay searches. In this study, GYGAG crystals with different Yttrium concentrations were fabricated and their energy resolution, pulse shape discrimination capability between $α$ and $γ$ rays, and scintillation timing characteristics were evaluated for applications in 0$νββ$ decay searches. Y substitution enhanced the light yield, and the best energy resolution was achieved for Gd$_{2.5}$Y$_{0.5}$Al$_2$Ga$_3$O$_{12}$. GYGAG exhibited high pulse shape discrimination performance across various yttrium concentrations. |
| title | Performance evaluation of GYGAG crystals for neutrinoless double beta decay search |
| topic | Instrumentation and Detectors Nuclear Experiment |
| url | https://arxiv.org/abs/2605.28414 |