Randomness from radiation: evaluation and analysis of radiation-based random number generators Roohi Zafar, Muhammad Kamran, Tahir Malik, Kashish Karera, Muhammad Humayon, Ghulam Mustafa and Muhammad Mubashir Khan Eur. Phys. J. Plus, 140 5 (2025) 463 Published online: 30 May 2025 DOI: 10.1140/epjp/s13360-025-06428-4