ɐ plˈæstɪk sˈɪntɪlˌeɪɾɚ mˈeɪ biː jˈuːzd əkɹˌɑːs ðə fɹˈʌnt wˌɪtʃ ɪz ɹˈiːzənəbli tɹænspˈæɹənt tə ɡˈæmɚ ɹˈeɪz, bˌʌt ɪfˈɪʃəntli ɹᵻdʒˈɛkts ðə hˈaɪ flˈʌksᵻz ʌv kˈɑːzmɪkɹˈeɪ pɹˈoʊtɑːnz pɹˈɛzənt ɪn spˈeɪs.
A plastic scintillator may be used across the front which is reasonably transparent to gamma rays, but  efficiently rejects the high fluxes of cosmic-ray protons present in space.