Photoneutron Flux Measurement via Neutron Activation Analysis in a Radiotherapy Bunker with an 18 MV Linear AcceleratorYiğit Çeçen, Tuğçe Gülümser, Çağrı Yazgan, Haris Dapo, Mahmut Üstün and Ismail BoztosunEPJ Web Conf., 153 (2017) 07006DOI: https://doi.org/10.1051/epjconf/201715307006