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dc.contributor.authorHwu, Yeu-Pyngen
dc.date.accessioned2017-01-30T21:03:02Zen
dc.date.available2017-01-30T21:03:02Zen
dc.date.issued1963en
dc.identifier.urihttp://hdl.handle.net/10919/74554en
dc.description.abstractThe buckling constant for neutron moderators in the shape of an elliptic cylinder, hemisphere, and"piggy-back" cylinder has been determined by experimental measurements using paraffin as a moderator. The pulsed neutron sources technique was used throughout the work; a fast neutron burst of short duration was injected into regular paraffin shapes (cylinders with diameter and height ratio equal approximately to one). An empirical curve of decay constant of the neutron population versus the buckling was obtained. The measured decay constant, λ, was fitted by the method of least square to a parabola in B² of the form: λ=Σav+ B²D - CB⁴ where λ= the decay constant B² = the buckling constant Σa = the macroscopic absorption cross section v = the neutron velocity D = diffusion coefficient C = diffusion cooling coefficient The resulting values of the diffusion parameters are: Σa v = 4858 ± 162 sec⁻¹ D = 25911 ± 202 sec⁻¹ cm² C = 1186 ± 2558 sec⁻¹ cm⁴ By measuring the decay constant, the buckling of the moderators with irregular shapes were determined from the above parameters. The result was in general accord with the theoretical approximations for such shapes.en
dc.format.extent35 leavesen
dc.format.mimetypeapplication/pdfen
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Instituteen
dc.relation.isformatofOCLC# 20950531en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1963.H88en
dc.subject.lcshBuckling (Mechanics)en
dc.subject.lcshAlkanesen
dc.titleExperimental determination of the buckling for unusual geometrical shapes using paraffinen
dc.typeThesisen
dc.contributor.departmentPhysicsen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Instituteen
thesis.degree.disciplinePhysicsen
dc.type.dcmitypeTexten


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