Light emission via surface plasmon excitation can be used as a sensitive detector for hot electrons in metal-insulator-metal structures. Ballistic and electron-electron scattering mean free path values obtained for silver with this method in the 2.19 to 2.44 eV energy range are in good agreement with theoretical predictions. CBeT, IIOJlJWeHHbIfi npH PaCIIaEe IIOBePXHOCTHbIX HJIa3MOHOB MOXWT CJIYXWlTb 9YBCTBH-TenbHbIM AeTeKTOpOM rOPR9EIX BJIBIETPOHOB B TOHKOILTeH09HbIX CTPYKTYPaX TMna Me-Tanz-oKmen-MeTann. IIonyqeHHare c noMombm 3~01-0 MeTona B TOHKUX nnemax ce-pe6pa ~~J I~U C T H~~C K U~ cpenme ~J I E I H H CBO60~HOrO npo6era BJI~KTPOHOB EI cpemnie I[nUHbI CBO60~HOrO npo6era 3neKTpOH-3neKTpOHHOrO paCCeRHHR HaXOAFITCR B XOpOIueM COrJIaCEIA C TeOpeTEIgeCKUMH OUeHKaMEI B EIHTepBane 3HePrHII 2,19 A0 2,44 e v . l ) Konkoly Thege ut. 29-33, Budapest XII, Hungary. 15'

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The dispersion relation of surface plasma oscillations of the Au-vacuum interface was determined from the light emission of Al-Al_03-Au tunnel diodes. The comparison of results with previous data obtained on Ag^indicate that the mechanism of light generation is qualitatively the same for all MOM structures if the anode is one of the noble metals. АННОТАЦИЯДисперсионный закон ПЭВ на разделе золото-вакуум был определён в AI-AI2 O3 -AU туннельных диодах измеряя спектральное и угловое распределения из лучаемого света. Сравнение результатов измерений с данными, полученными раньше для Ад показало, что механизм генерации света является качественно тождествен ным во всех МОМ структурах с анодом из драгоценных металлов. KIVONATAl-A^O^-Au MOM tunnel diódákból kilépő fény spektrális és szögeloszlá sának mérésével meghatároztuk az arany-vákuum felülethez tartozó felületi plazmonok diszperziós összefüggését. A kisérleti eredményeket az ezüstre vo natkozó korábbi adatokhoz hasonlítva megállapítható, hogy mindazokban a MOM szerkezetekben, ahol az anód nemes-fém, a fénykibocsátás mechanizmusa lénye gében azonos.

The study may inform about the electron microscopic investigation of the sand layers in seven core drillings in the Danube-Tisza Interfluve region. The primary aim of the investigations was to obtain exact data about the blown sand layers under the surface. In five out of six drillings on the alluvial fan of the Danube blown sand layers were explored (the number of layers varied between 2 and 7). There were apparently phases in the formation of the alluvial fan when on certain parts flooding was replaced by eolian processes. The blown sand layers under the surface, however, are only several metres thick at the most. The seventh drilling (at J~noshalma) proves that this region constitutes the continuation of Transdanubia and does not belong to the alluvial fan of the Danube. At J~noshalma the driller bored through 26 loess, sandy loess, and loessy sand layers, and more than 10 blown sand layers under the surface in the Quaternary sequence.

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