초록 ▼

The present invention discloses a scintillation detector 10 comprising a scintillation crystal 12 covered by an inner coating layer 14, said inner coating layer 14 being reflective to light spectrum, and said inner coating layer 14 being stuck directly to said crystal by a chemical and/or a physical

The present invention discloses a scintillation detector 10 comprising a scintillation crystal 12 covered by an inner coating layer 14, said inner coating layer 14 being reflective to light spectrum, and said inner coating layer 14 being 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 10. According to a still further aspect of the invention, a method is disclosed to manufacture a scintillation detector 10, comprising the steps of: defining two surface parts in a scintillation crystal 12: first and second part, covering said first part of said scintillation crystal 12 with an inner coating layer 14, said inner coating layer 14 being reflective to light spectrum and said inner coating layer 14 being stuck directly to said crystal 12 by a chemical and/or a physical binding, leaving said second part without coating, positioning said scintillation crystal 12 and said inner coating layer 14 in a shock absorbing member 18, positioning said second part in front of an optical window 24 transmissive to scintillation light given by said scintillation crystal 12, positioning said shock absorbing member 18 and said optical window 24 in a protective housing 20.

대표청구항 ▼

The invention claimed is: 1. A scintillation detector (10) comprising:a scintillation crystal (12) comprised of a sodium iodide crystal activated with thallium, and covered by an inner coating layer (14) reflective to light spectrum, andan outer coating layer (16) comprised of platinum or gold;where

The invention claimed is: 1. A scintillation detector (10) comprising:a scintillation crystal (12) comprised of a sodium iodide crystal activated with thallium, and covered by an inner coating layer (14) reflective to light spectrum, andan outer coating layer (16) comprised of platinum or gold;wherein said inner coating layer (14) being stuck directly to said outer coating layer (16) by a chemical and/or physical vapor deposition process for ensuring a perfect contact with inhomogeneities on the scintillation crystal (12), andwherein the inner coating layer (14) is grown on a surface of the scintillation crystal (12) for ensuring a uniform thickness of said inner coating layer (14).