Identification of Activation Isotopes in a CS-30 Cyclotron Vault.

Alhussain A Abuhoza, Hamoud A Kassim, Ahmed A Alghamdi, Faisal M Alrumayan, Mehenna Arib, Ibrahim J Aljammaz, Meshari ALQahtani

Sensors (Basel, Switzerland) 2022 Mar 28

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A CS-30 cyclotron has been in operation at King Faisal Specialist Hospital and Research Center (KFSHRC) since 1982. The CS-30 cyclotron has been used to produce medical radioisotopes for positron emission tomography (PET) and single-photon emission computed tomography (SPECT). Some of the nuclear reactions of radionuclide production are associated with the intense release of a wide range of fast neutrons. In this work, we investigated the radionuclides produced from neutron interactions with the cyclotron facility walls. Activation isotopes were determined by performing gamma ray spectrometry utilizing a high-purity germanium (HPGe) detector. The major radionuclides found were 152Eu, 154Eu, 134Cs, 65Zn and 60Co. Activation isotope accumulation had increased the dose rate inside the facility. The surface dose rates were measured at all of the surrounding walls. The maximum surface dose rate was found to be 1.2 µSv/h, which is much lower than the permissible occupational exposure of 15 µSv/h based daily 5 work hours.

Citation

Alhussain A Abuhoza, Hamoud A Kassim, Ahmed A Alghamdi, Faisal M Alrumayan, Mehenna Arib, Ibrahim J Aljammaz, Meshari ALQahtani. Identification of Activation Isotopes in a CS-30 Cyclotron Vault. Sensors (Basel, Switzerland). 2022 Mar 28;22(7)