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Measurement of the cosmic muon flux at the Stawell Underground Physics Laboratory.

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Title: Measurement of the cosmic muon flux at the Stawell Underground Physics Laboratory.
Authors: Fu, G.1,2 (AUTHOR), Mews, M.1,2 (AUTHOR), Scutti, F.1,3 (AUTHOR) fscutti@swin.edu.au, Urquijo, P.1,2 (AUTHOR), Barberio, E.1,2 (AUTHOR), Bashu, V.1,4 (AUTHOR), Bignell, L.J.1,4 (AUTHOR), Bolognino, I.1,5,6 (AUTHOR), Cools, A.1,2 (AUTHOR), Dastgiri, F.1,4 (AUTHOR), Duffy, A.R.1,3,7 (AUTHOR), Einfalt, L.1,2 (AUTHOR), Froehlich, M.1,4 (AUTHOR), Fruth, T.1,8 (AUTHOR), Gerathy, M.1,2 (AUTHOR), Hancock, M.1,5 (AUTHOR), James, R.1,2 (AUTHOR), Kapoor, S.1,8 (AUTHOR), Krishnan, S.1,3 (AUTHOR), Lane, G.J.1,4 (AUTHOR)
Source: Astroparticle Physics. Jul2026, Vol. 179, pN.PAG-N.PAG. 1p.
Subjects: Cosmic ray muons, Scintillation counters, Particle detectors, Laboratories, Physics experiments
Geographic Terms: Australia
Abstract: We report the first measurement of the underground cosmic muon flux at the Stawell Underground Physics Laboratory. The measurement uses eight EJ200 plastic scintillator panels, equipped with Hamamatsu R13089 PMT pairs at the ends, which are the primary components of the muon veto system for the upcoming SABRE South experiment. This study uses approximately 236 days of data collected between 2024 and 2025, with the muon veto system arranged in a telescopic configuration. SUPL, located 1025 metres below ground at the Stawell Gold Mine in Victoria, Australia, has a flat overburden of approximately 2.8 km of water equivalent, which significantly reduces the muon flux. The overburden is well characterised through data collected by the mining company, allowing tight constraints on systematic uncertainties. The measured muon flux is f = (6. 33 ± 0. 0 4 stat ± 0. 3 5 sys) × 1 0 − 8 [ s − 1 × cm − 2 ]. This measurement is in excellent agreement with simulations, with a relative uncertainty an order of magnitude smaller than the modelling uncertainty. • First muon flux measurement at the Stawell Underground Physics Laboratory (SUPL). • SABRE South muon veto system has been used in telescopic configuration. • Based on 236 days of underground data collected between 2024 and 2025. • Measured muon flux is (6. 33 ± 0. 0 4 stat ± 0. 3 5 sys) × 1 0 − 8 s − 1 cm − 2 . • Results agree with expectation while being an order of magnitude more precise. [ABSTRACT FROM AUTHOR]
Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
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  Data: Measurement of the cosmic muon flux at the Stawell Underground Physics Laboratory.
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  Data: We report the first measurement of the underground cosmic muon flux at the Stawell Underground Physics Laboratory. The measurement uses eight EJ200 plastic scintillator panels, equipped with Hamamatsu R13089 PMT pairs at the ends, which are the primary components of the muon veto system for the upcoming SABRE South experiment. This study uses approximately 236 days of data collected between 2024 and 2025, with the muon veto system arranged in a telescopic configuration. SUPL, located 1025 metres below ground at the Stawell Gold Mine in Victoria, Australia, has a flat overburden of approximately 2.8 km of water equivalent, which significantly reduces the muon flux. The overburden is well characterised through data collected by the mining company, allowing tight constraints on systematic uncertainties. The measured muon flux is f = (6. 33 ± 0. 0 4 stat ± 0. 3 5 sys) × 1 0 − 8 [ s − 1 × cm − 2 ]. This measurement is in excellent agreement with simulations, with a relative uncertainty an order of magnitude smaller than the modelling uncertainty. • First muon flux measurement at the Stawell Underground Physics Laboratory (SUPL). • SABRE South muon veto system has been used in telescopic configuration. • Based on 236 days of underground data collected between 2024 and 2025. • Measured muon flux is (6. 33 ± 0. 0 4 stat ± 0. 3 5 sys) × 1 0 − 8 s − 1 cm − 2 . • Results agree with expectation while being an order of magnitude more precise. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.astropartphys.2026.103240
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      – SubjectFull: Scintillation counters
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