PRESENTACIÓN A EVENTOS

URI permanente para esta colección

https://nuclea.cnea.gob.ar//handle/20.500.12553/1289

Examinar

Examinando PRESENTACIÓN A EVENTOS por Autor "Achterberg, Erhard O. J."

Mostrando 1 - 4 de 4
  • Miniatura
    ÍtemAcceso Abierto
    Levels of 66 Kr Fed in the decay of 86 Br
    (Comisión Nacional de Energía Atómica. Departamento de Física Nuclear (Argentina), 1972) Achterberg, Erhard O. J.; Iglesias, F. C.; Jech, Alberto Estanislao; Moragues, Jaime Baudilio A.; Pérez, M. L.; Rossi, J. J.; Scheuer, Walter; Suárez, J. F.
    La desintegración de 86 Br se ha estudiado con detectores de Ge (Li) de alta resolución aplicando técnicas de separación de masas en línea a productos de fisión de 235 U. Se asignaron positivamente 19 transiciones a este decaimiento a través de comparaciones de vida media, y para 10 de ellas se realizaron mediciones directas de la vida media, arrojando un valor promedio de 59 ± 4 segundos. Los niveles para 86 Kr se proponen en (Jr entre paréntesis)….
  • Miniatura
    ÍtemAcceso Abierto
    Nuclear spectroscopy of iodine isotopes with A>134
    (European Organization for Nuclear Research (CERN), 1970) Achterberg, Erhard O. J.; De Aisenberg, E. Y.; Iglesias, F. C.; Jech, Alberto Estanislao; Moragues, Jaime Baudilio A.; Otero, D.; Pérez, M. L.; Proto-Otero, A. N.; Rossi, J. J.; Scheuer, W.; Suárez, J. F.
    During our exploration of the heavy fission peak o£ 235U in search of iodine isotopes at the Buenos Aires ISOL xx) we were able to record significant activity from mass numbers 134, 135 and 136.The available information for I34i at that time 1)2)3)4) included the observation by Erten and Coryell 1) of a 273 keV gamma ray with a half-life of 3.8 +0.5 min, and we decided to investígate the nature of this transition and of the associated isomeric state. Erten and Coryell had concluded that this isomeric level belonged to the I level scheme on the basis of their observations of the growth and decay of the activity due to low-lying transitions in 134Xe. Once our measurements had started, Erten, Coryell and Walters 5) suggested that the 273 keV ray itself belonged to I and that it was the transition which depopulated the isomeric level.
  • Miniatura
    ÍtemAcceso Abierto
    On line separation of short-lived iodine isotopes
    (Herausgeber: H. Wagner, W. Walcher. Physikalisches Instituí der Universitat Marburg, 1970) Achterberg, Erhard O. J.; De Aisenberg, E. Y.; Iglesias, F. C.; Jech, Alberto Estanislao; Moragues, Jaime Baudilio A.; Otero, O.; Pérez, K .L.; Proto-Otero, A. N.; Rossi, J. J.; Scheuer, W.; Suárez, J. F.
    The Buenos Aires ISOL set-up was designed primarily to study short lived fission products, if possible without being restricted to gases, i. e. Kr and Xe, but having also a reasonable chance to detect non-gaseous but volatile elements, such as Br and I. To this end the following design was adopted: a) a fission-product generating system coupled through a short ( 50 cm) transport line to b) an electromagnetic mass separator o£ high resolving power and efficiency, with double focussing, which delivers the mass to be studied to c) the- collecting device with its detection system, which includes a moving-tape collector and Ge(Li) and Si(Li) detectors.
  • Miniatura
    ÍtemAcceso Abierto
    The Development of the TANDAR project
    (Oak Ridge National Laboratory. Holifield Heavy Ion Research Facility, 1981) Mariscotti, Mario A. J.; Ventura, Edgardo; Cevallos, A. E.; Fazzini, N. A.; Filevich, Alberto; González, Hipólito; Requejo, Ricardo; Ribarich, R. B.; Rossi, J. J.; Achterberg, Erhard O. J.; Camín, D. V.; Milber, Jorge; Nicolai, J. A.; Tau, Sergio
    Progrese on the installation of the Buenos Aires 20 MV Electrostatic Accelerator is proceeding at a rate consistent with its completion by 1982. About 90% of the civil engineering work on the accelerator Loweis completed. The vessel has successfully passed pressure test up to 18 atm. Installation of the accelerator is due to start by the end of April 81. An outlineof the research programme is also presented.