The gamma-ray background at balloon altitudes

dc.contributor.advisorHaymes, Robert C.en_US
dc.creatorDjuth, Frank T. (Frank Thomas)en_US
dc.date.accessioned2018-12-18T21:16:03Zen_US
dc.date.available2018-12-18T21:16:03Zen_US
dc.date.issued1977en_US
dc.description.abstractOn April 2, 1974, a balloon-borne observation of the gamma-ray background at 4 mbar pressure was conducted in the energy band .3-12.27 MeV. The measurements were made at a geomagnetic cutoff rigidity of 11.9 GV. Cosmicray-induced activation of the Nal(Tl) detector was discovered to be a major source of the background count rate in the energy region .15-2.5 MeV. The cosmic diffuse gamma radiation makes a sizable contribution to the background count rate in the low energy region .3 - .15 MeV. At these energies lower limits for the diffuse gamma-ray flux were determined. A search of the detector data for evidence of cosmic gamma-ray bursts proved inconclusive. The conclusions drawn from the background study can be utilized in order to design a very low background gammaray detector for celestial observations.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent241 ppen_US
dc.identifier.callnoThesis Sp. Sci. 1977 Djuthen_US
dc.identifier.citationDjuth, Frank T. (Frank Thomas). "The gamma-ray background at balloon altitudes." (1977) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/103998">https://hdl.handle.net/1911/103998</a>.en_US
dc.identifier.digitalRICE1624en_US
dc.identifier.urihttps://hdl.handle.net/1911/103998en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleThe gamma-ray background at balloon altitudesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentSpace Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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