Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"gamma spectrum"”.
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Search for the eta c
… in the reaction pi minus p -> X n, X -> gamma gamma at 13 Gev. We used a double arm spectrometer with lead glass and scintillation elements. No resonances were observed above mass 2.8 in the gamma gamma spectrum. The upper limit for the eta c cross section tines branching ratio is 23 pb.
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Particles produced in association with psi (3098)
… Particular attention has. been paid to the PSI Gamma spectrum which shows an excess of events in the region 3.5 Gev. Attributing this to the presence of the X (~3. 5) states implies that 94±50% of psis are produced via radiative chi decay.
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Gamma and neutron dose profiles near a Cf-252 brachytherapy source
… calibration experiment showed that the measured gamma dose rates near the new source are slightly greater than the neutron dose rates; contradicting the well established neutron-to-gamma dose ratio of approximately 2:1 at locations near a Cf-252 brachytherapy source. Specifically, the …
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The decay scheme of Kr⁸⁷
… minutes in agreement with other investigators. Gamma spectra and gamma-gamma coincidence measurements employed two integral line NaI(Tl) detectors with 3 in. diameter by 3 in. long crystals. Beta measurements were made using a 2 in. diameter by 1/2 in. long CaF₂(Eu) integral line detector. Both …
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Development of a Bayesian linear regression model for the detection of a weak radiological source from gamma spectra measurements
… and tested that uses the entirety of the gamma spectrum. Specifically, several Bayesian linear regressions are developed and tested which compared different energy ranges in the spectrum. The parameters generated from these linear regressions are tested for their efficacy as decision …
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Automated wavelet analysis of low resolution gamma-ray spectra and peak area uncertainty
… isotope identification from low resolution gamma-ray spectra can be significantly improved with better algorithms. The method based on the wavelet transform and non-negative least squares (NNLS) are discussed in this thesis. Several improvements are made for the wavelet algorithm itself and …