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arXiv · 2511.04185

Two-exponential decay of Acridine Orange

Francesco Giacosa·Anna Kolbus·Krzysztof Kyziol·Magdalena Plodowska·Milena Piotrowska·Karol Szary·Arthur Vereijken
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Abstract

In this work, we experimentally study the fluorescence decay of Acridine Orange at late times, in order to test whether a late-time power-law behaviour emerges, a feature expected to be very small but consistent with quantum mechanical and quantum field theoretical predictions. Using two distinct photon detectors, we find that the data are well described by a sum of two exponential functions with lifetimes $\tau_1 = 1.7331 \pm 0.001$ ns and $\tau_2 = 5.948 \pm 0.012$ ns, in agreement with values reported in the literature. While no deviation from the exponential decay law is observed, this study serves as a reliable test for the experimental setup and enables a precise determination of the sample lifetimes.

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Francesco Giacosa, Anna Kolbus, Krzysztof Kyziol, Magdalena Plodowska, Milena Piotrowska, Karol Szary, Arthur Vereijken. 2025-11-06. Two-exponential decay of Acridine Orange. https://doi.org/10.12693/aphyspola.148.s110

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