A self-powered neutron detector (SPND) is a device that, coupled with a current meter, provides a readout proportional to neutron population. This thesis discusses the design parameters of an array of such devices, their characteristics, and the use of these devices as a self-powered neutron spectrometer (SPNS) to provide information about the energy distribution in a neutron radiation field. Neutron absorption in an appropriate material produces subsequent beta emissions. In a SPND, some of these beta particles will cross a non-conducting region and stop in a collector material. A net exchange of charge between these regions can be read as a current flowing between the emission region and the collector region. One potential SPNS design was modeled using a Monte Carlo simulation of the device's interaction with a radiation field. The Monte Carlo program used predicts the beta flux which is proportional to the current that would be produced by an actual device. Various beta emitting materials were considered for this device, and a sensitivity study of each was included. The design considered is comprised of a concentric set of these cylindrical SPND detector elements which, in themselves, are currently available technology. / Graduation date: 1999

Thesis (Ph.D.)--University of Nebraska-Lincoln, 2006. / Title from title screen (site viewed on Mar. 13, 2007). PDF text: xiii, 159 p. : ill. (some col.) UMI publication number: AAT 3223008. Includes bibliographical references. Also available in microfilm, microfiche and paper format.

Thesis (M. Sc.)--University of Hong Kong, 1965. / Mimeographed.

Thesis (M. Sc.)--University of Hong Kong, 1967. / Mimeographed.

published_or_final_version / abstract / Physics / Master / Master of Philosophy

No description available.

No description available.

No description available.

The inclusive production of the neutral strange particles, Λ, Λ and K0S , has been studied with the ZEUS detector at HERA. The measurement provides a way to understand the fragmentation process in ep collisions and to check the universality of this process. The strangeness cross sections have been measured and compared with Monte Carlo (MC) predictions. Over the kinematic regions of interest, no Λ to Λ asymmetry was observed. The relative yield of Λ and K0S was determined and the result was compared with MC calculations and results from other experiments. A good agreement was found except for the enhancement in the photoproduction process. Clear rapidity correlation was observed for particle pairs where either quark flavor or baryon number compensation occurs. The K0SK0S Bose-Einstein correlation measurement gives a result consistent with those from LEP measurements. The Λ polarizations were measured to be consistent with zero for HERA I data.

Thesis (M.Sc.)--University of Hong Kong, 1965. / Also available in print.