| 摘要 |
The system according to the invention comprises at least one sensor 1 including two test bodies C1, C2 each including an ionisation chamber 8, 8' fitted with an electrometer and at least one transparent zone 6, 6' allowing viewing of the moving part of the electrometer, one of the test bodies C2 essentially responding to the gamma -radiation, whereas the other C1 is sensitive both to gamma -radiation and to neutrons in determined proportions, and a reading device 13 common to the two sensors C1, C2 comprising at least one optical assembly L1, L'2 capable of projecting the image of the moving part 12, 12' of the two test bodies C1, C2 onto the sensitive part 19, 19' of at least one photoelectric detector 18, 18'. The invention allows selective individual measurement of doses of gamma -radiation and neutrons in a mixed field. <IMAGE>
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