Radioisotopes of caesium require special precautions: the improper handling of caesium-137 gamma ray sources can lead to release of this radioisotope and radiation injuries.
ɹˌeɪdɪoʊˈaɪsətˌoʊps ʌv sˈiːsiəm ɹᵻkwˈaɪɚ spˈɛʃəl pɹɪkˈɔːʃənz: ðɪ ɪmpɹˈɑːpɚ hˈændlɪŋ ʌv sˈiːsiəm wˈʌnhˈʌndɹɪd θˈɜːɾi sˈɛvən ɡˈæmɚ ɹˈeɪ sˈoːɹsᵻz kæn lˈiːd tə ɹᵻlˈiːs ʌv ðɪs ɹˌeɪdɪoʊˈaɪsətˌoʊp ænd ɹˌeɪdɪˈeɪʃən ˈɪndʒɚɹiz.