RETRACTED: Measurement of Etching rate and determination of radon concentration using LR 115 SSNTD filmsGaneshprasad T. Kalgal, Kaliprasad C S, M.M. Prakash, Y. Narayana, R.S. Madhukeswara and Y. RaghuEPJ Web Conf., 359 (2026) 02011DOI: https://doi.org/10.1051/epjconf/202635902011