Scintillation optical fibre device for collecting ionizing radiation

A device (1) for collecting ionizing radiation, the device being of the type comprising an opaque sheath (3) provided with first and second ends (10, 15) and a scintillating element (4) housed inside the opaque sheath, having a first end (7) suitable for receiving ionizing radiation and a second end (14) opposite its first end, the element being arranged to convert the ionizing radiation received via its first end into light signals and to deliver said signals through its second end,

• the device being characterized in that it further comprises filter means (9) placed at the first end (10) of the sheath (3) to prevent at least external photons (ν) gaining access to the first end (7) of the scintillating element (4), and in that it further comprises first connection means (16;
• 22) at the second end (14) of the scintillating element (4) and suitable for connection to light guide means (2) to enable said second end (14) of the scintillating element to be coupled to the end (17) of a light guide (18) of said light guide means.