ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The luminescence-response of ZnS/Ag and CaWO4 to ion-bombardement and the deterioration of luminescence under prolonged irradiation was determined as a function of ion-energyE, ion-massM i and beam-densityI. The variation of lightoutput with ion-energy is of the formJ 0=C. (E-E 0) n withn=2 (ZnS/Ag) or lower values (CaWO4). The luminescence-response to ions of various mass was found to decrease generally with growing mass, but to be nearly constant to ions of middle atomic weight (ZnS/Ag). The luminescence-efficiency, caused by ions of energy greater than 5 keV, is independent of beam-density within the whole range studied here (maximum 3 · 10−7 A · cm−2), but it diminishes in the caseE=5 keV for values ofI above 6 · 10−8 A · cm−2. The deterioration-effect grows, except in the case of He+-ions, the lightest ions used here, with ion-energy. It also increases by substituting Ne+- for He+-ions, but remains nearly independent of mass (CaWO4) or diminishes with growing ion-mass (ZnS/Ag), if the ions are heavier than Ne+-ions. Increasing beam-density leads to a reduced deterioration of ZnS/Ag-luminescence, yet has no influence to that of CaWO4.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01341419
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