Matches in SemOpenAlex for { <https://semopenalex.org/work/W2390902479> ?p ?o ?g. }
Showing items 1 to 75 of
75
with 100 items per page.
- W2390902479 abstract "Background: In nuclear monitoring applications, a gamma-ray imager based on coded aperture(CA) technology can get a 2-D source intensity distribution map, which is superimposed on a corresponding video camera image, to visualize an object scene indicating the location, activity and even the type of radionuclide of radioactive sources. Though the CA imager has some advantages, it is still limited to imaging sources at large standoff distance or with high energy photon emission. There are two main barriers. One is that increasing the area of position-sensitive detector brings unacceptable additional system complexity and cost. Another is that thicker detector induces image blurring. Purpose: In order to overcome the disadvantages of CA imager, a novel gamma-ray imager prototype based on rotating modulator(RM) technique is built in our laboratory. Methods: The laboratory prototype consists of a rotating collimator, a NaI(Tl) detectors array, readout and control circuit, a stepping motor, and their supporting frame. Experimental tests were carried out. Results: The field of view(FOV) of this prototype is ±14.6°. An angular resolution of 2° is achieved. The energy resolution of the NaI(Tl) detectors is 7%@662 keV and their average detection efficiency to 662-keV gamma-rays is 22.2%. Conclusion: A RM imager is capable of imaging gamma-rays and measuring the incident photon spectrum simultaneously. Thus it can form radioactive map of different radionuclide. Through temporal modulation and image reconstruction, the angular resolution of RM imager is comparable to that of a CA imager. Using non-position-sensitive detectors, the detector area and thickness can be increased to improve the detection efficiency with relatively low cost. The study is still in progress and the performance of the RM imager is expected to be improved for further development." @default.
- W2390902479 created "2016-06-24" @default.
- W2390902479 creator A5005815730 @default.
- W2390902479 date "2014-01-01" @default.
- W2390902479 modified "2023-09-24" @default.
- W2390902479 title "Development of a rotating modulator gamma-ray imager" @default.
- W2390902479 hasPublicationYear "2014" @default.
- W2390902479 type Work @default.
- W2390902479 sameAs 2390902479 @default.
- W2390902479 citedByCount "0" @default.
- W2390902479 crossrefType "journal-article" @default.
- W2390902479 hasAuthorship W2390902479A5005815730 @default.
- W2390902479 hasConcept C114614502 @default.
- W2390902479 hasConcept C120665830 @default.
- W2390902479 hasConcept C121332964 @default.
- W2390902479 hasConcept C133848361 @default.
- W2390902479 hasConcept C150627866 @default.
- W2390902479 hasConcept C185544564 @default.
- W2390902479 hasConcept C186370098 @default.
- W2390902479 hasConcept C205372480 @default.
- W2390902479 hasConcept C24890656 @default.
- W2390902479 hasConcept C2777962739 @default.
- W2390902479 hasConcept C2779200277 @default.
- W2390902479 hasConcept C2779464207 @default.
- W2390902479 hasConcept C2779610220 @default.
- W2390902479 hasConcept C33923547 @default.
- W2390902479 hasConcept C62520636 @default.
- W2390902479 hasConcept C78336883 @default.
- W2390902479 hasConcept C7910260 @default.
- W2390902479 hasConcept C94915269 @default.
- W2390902479 hasConceptScore W2390902479C114614502 @default.
- W2390902479 hasConceptScore W2390902479C120665830 @default.
- W2390902479 hasConceptScore W2390902479C121332964 @default.
- W2390902479 hasConceptScore W2390902479C133848361 @default.
- W2390902479 hasConceptScore W2390902479C150627866 @default.
- W2390902479 hasConceptScore W2390902479C185544564 @default.
- W2390902479 hasConceptScore W2390902479C186370098 @default.
- W2390902479 hasConceptScore W2390902479C205372480 @default.
- W2390902479 hasConceptScore W2390902479C24890656 @default.
- W2390902479 hasConceptScore W2390902479C2777962739 @default.
- W2390902479 hasConceptScore W2390902479C2779200277 @default.
- W2390902479 hasConceptScore W2390902479C2779464207 @default.
- W2390902479 hasConceptScore W2390902479C2779610220 @default.
- W2390902479 hasConceptScore W2390902479C33923547 @default.
- W2390902479 hasConceptScore W2390902479C62520636 @default.
- W2390902479 hasConceptScore W2390902479C78336883 @default.
- W2390902479 hasConceptScore W2390902479C7910260 @default.
- W2390902479 hasConceptScore W2390902479C94915269 @default.
- W2390902479 hasLocation W23909024791 @default.
- W2390902479 hasOpenAccess W2390902479 @default.
- W2390902479 hasPrimaryLocation W23909024791 @default.
- W2390902479 hasRelatedWork W185994126 @default.
- W2390902479 hasRelatedWork W1977377056 @default.
- W2390902479 hasRelatedWork W1988470714 @default.
- W2390902479 hasRelatedWork W2024411334 @default.
- W2390902479 hasRelatedWork W2035605003 @default.
- W2390902479 hasRelatedWork W2036859114 @default.
- W2390902479 hasRelatedWork W2038628347 @default.
- W2390902479 hasRelatedWork W2039349178 @default.
- W2390902479 hasRelatedWork W2042236148 @default.
- W2390902479 hasRelatedWork W2054925713 @default.
- W2390902479 hasRelatedWork W2070297228 @default.
- W2390902479 hasRelatedWork W2088965801 @default.
- W2390902479 hasRelatedWork W2103021570 @default.
- W2390902479 hasRelatedWork W2156809086 @default.
- W2390902479 hasRelatedWork W2166858594 @default.
- W2390902479 hasRelatedWork W2362369831 @default.
- W2390902479 hasRelatedWork W2536620500 @default.
- W2390902479 hasRelatedWork W2542123405 @default.
- W2390902479 hasRelatedWork W2543974084 @default.
- W2390902479 hasRelatedWork W2570680486 @default.
- W2390902479 isParatext "false" @default.
- W2390902479 isRetracted "false" @default.
- W2390902479 magId "2390902479" @default.
- W2390902479 workType "article" @default.