Covering of scintillation detector with a reflective coating

Abstract

The present invention discloses a scintillation detectorcomprising a scintillation crystalcovered by an inner coating layer, said inner coating layerbeing reflective to light spectrum, and said inner coating layerbeing stuck directly to said crystal by a chemical and/or a physical binding. According to further aspect of the invention, a method is disclosed to measure radiation from an wellbore environment with the aforementioned scintillation detector. According to a still further aspect of the invention, a method is disclosed to manufacture a scintillation detector, comprising the steps of: defining two surface parts in a scintillation crystal: first and second part, covering said first part of said scintillation crystalwith an inner coating layer, said inner coating layerbeing reflective to light spectrum and said inner coating layerbeing stuck directly to said crystalby a chemical and/or a physical binding, leaving said second part without coating, positioning said scintillation crystaland said inner coating layerin a shock absorbing member, positioning said second part in front of an optical windowtransmissive to scintillation light given by said scintillation crystal, positioning said shock absorbing memberand said optical windowin a protective housing