Scintillation counter and composite phosphor therefor

Claim 1

IN A SCINTILLATION COUNTER COMPRISING A LIGHTTIGHT HOUSING PERMEABLE TO GAMMA AND X-RAY RADIATION, THE IMPROVEMENT COMPRISING A PHOSPHOR MEMBER DISPOSED IN THE HOUSING COMPRISING A MAIN BODY OF AT LEAST ONE CRYSTAL OF AN ORGANIC POLYCYCLIC PHOSPHOR PRODUCING LIGHT WHEN EXCITED BY GAMMA AND X-RAY RADIATION THE CRYSTAL BEING OF SUBSTANTIAL SIZE AND, DISPOSED IN CONTACT WITH THE ORGANIC PHOSPHOR, AN INORGANIC PHOSPHOR ALSO PRODUCING LIGHT WHEN EXCITED BY GAMMA AND X-RAY RADIATION, THE WEIGHT OF THE INORGANIC PHOSPHOR BEING PRESENT FROM SIGNIFICANT AMOUNTS UP TO 100% OF THE WEIGHT OF THE ORGANIC PHOSPHOR, THE COMBINED PHOSPHORS HAVING SUBSTANTIALLY NON-DIRECTIONAL SCINTILLATION CHARACTERISTICS IN RESPONSE TO GAMMA RADIATION AND HAVING A MORE UNFORM CORRELATION BETWEEN LIGHT OUTPUT ROENTGEN-RATE WHEN EXPOSED TO GAMMA AND X-RAY RADIATION THAN EITHER ALONE.