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574 results on '"Hildebrand, R."'

202. Revisão do gênero Berecynthus Stal, 1862 (Heteroptera, Pentatomidae, Pentatomini)

Author

Grazia, J., Hildebrand, R., and Plazi

Abstract

The genus Berecynthus Stal, 1862 and B. delirator (Fabricius, 1787) are redescribed based on the external morphology, as well as on the morphological characteres of genitalia of both sexes. B. imitator Jensen-Haarup, 1937 is considered a synonym of B. delirator. B. monrosi Piran, 1963 is transferred to the genus Euschistus Dallas, 1851. A study of the genitalia of E. monrosi is added.

Published
1982
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207. Character of the Radiation Field and Shielding at the 184-Inch Cyclotron.

Author

TECHNICAL INFORMATION SERVICE (AEC) OAK RIDGE TN, Moyer, B. J., Hildebrand, R., Knable, N., Parmley, T. J., York, H., TECHNICAL INFORMATION SERVICE (AEC) OAK RIDGE TN, Moyer, B. J., Hildebrand, R., Knable, N., Parmley, T. J., and York, H.

Abstract

The beam of 200 Mev deuterons in the 184-inch cyclotron gives rise to a conical spray of fast neutrons. (Refer to papers A 10 and A 11 of this meeting) with an upper limit of neutron energy somewhat above 100 Mev. The angle of the cone from axis to half-height is about 5.5 for a target of high atomic number, as measured by Helmholz, MacMillan, and Sewell with carbon detectors. In planning for final shielding of the cyclotron It was necessary to study the attenuation of the neutron beam in concrete. Due to the nature of the information desired the experimental arrangement employed was that shown in Figure 1. The monitor and detector employed were aluminum-walled ionization chambers, with DC Amplification, indicating on microammeters placed outside the magnetic field of the cyclotron. With this same arrangement data were also obtained with water as an absorber, contained in steel tanks made to fit Into the cavity and in front of it. Results of these measurements are given in Figure 2(a). The data for water have been corrected for the absorbing contribution of the tank walls. The displacements of the linear portions of the absorption plots are evidence of transition effects to be discussed later in this paper. In Figure 2(b) are shown concrete absorption data obtained with carbon disc detectors using the C 12 (n,2n) C 11 reaction whose threshold is about 20 Mev., Prepared in cooperation with California Univ. Mercury, NV.

Published
1947

235. Submillimeter observations of evolved stars

Author

Sopka, R. J., primary, Hildebrand, R., additional, Jaffe, D. T., additional, Gatley, I., additional, Roellig, T., additional, Werner, M., additional, Jura, M., additional, and Zuckerman, B., additional

Published
1985
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249. Asymmetry of Low-Energy Positrons from Muon Decay

Author

Pless, I. A., primary, Brenner, A. E., additional, Williams, R. W., additional, Bizzarri, R., additional, Hildebrand, R. H., additional, Milburn, R. H., additional, Shapiro, A. M., additional, Strauch, K., additional, Street, J. C., additional, and Young, L. A., additional

Published
1957
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