The gamma-ray background at balloon altitudes

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dc.contributor.advisorHaymes, Robert C.
dc.creatorDjuth, Frank T. (Frank Thomas)
dc.date.accessioned2018-12-18T21:16:03Z
dc.date.available2018-12-18T21:16:03Z
dc.date.issued1977
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.
dc.format.digitalOriginreformatted digital
dc.format.extent241 pp
dc.identifier.callnoThesis Sp. Sci. 1977 Djuth
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>.
dc.identifier.digitalRICE1624
dc.identifier.urihttps://hdl.handle.net/1911/103998
dc.language.isoeng
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.
dc.titleThe gamma-ray background at balloon altitudes
dc.typeThesis
dc.type.materialText
thesis.degree.departmentSpace Science
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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