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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 20 of 22 for “"internal conversion"”.
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Measurement of Internal-Conversion Cascading in Uranium-235 Fission Fragments
Made available in DSpace on 2014-12-11T17:26:10Z (GMT). No. of bitstreams: 1 7412254.pdf: 4687198 bytes, checksum: e55f6bdfe0aaa8da4444e18d56a68a86 (MD5) Previous issue date: 1973
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A Study of the Internal Conversion Electrons Emitted by Different Elements Produced in the Fission of Californium-252
Made available in DSpace on 2014-12-09T19:52:29Z (GMT). No. of bitstreams: 1 7021059.pdf: 3998381 bytes, checksum: 4605bb6cdf185f83a37c1e4473bb90df (MD5) Previous issue date: 1970
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Part I: Magnetic Internal Conversion Coefficient. Part Ii: Electrostatic Scattering of Neutrons. Part Iii: Anomalous Magnetic Moments of Nucleons
Made available in DSpace on 2015-05-12T17:11:32Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0001390.PDF: 3622659 bytes, checksum: 48eedcf1ba03f148a963f92fa76e0dad (MD5) Previous issue date: 1949
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The O+ 1 -> O+ g monopole transition in 112Cd
Internal conversion is a nuclear electromagnetic deexcitation process by which an electron is emitted from an atomic elec¬tron shell. This process competes with the emission of gam¬ma-rays from the nucleus- Recently a mini-orange electron spectrometer, for the recording of internal electron …
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Four-Wave Mixing Techniques Applied to the Investigation of Non-Adiabatic Dynamics in Polyatomic Molecules
… S0 potential are repopulated subsequent to the internal conversion process could be postulated. Most importantly, the form of nuclear motion that primarily funnels the population between the two electronic states could be identified as the C=C symmetric symmetric stretch mode in the polyene …
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Chlorine dioxide photochemistry in solution: time-resolved resonance Raman and femtosecond pump-probe studies
… recombination, vibrational relaxation, and internal conversion is investigated. Following OClO photoexcitation, subpicosecond geminate recombination of the primary ClO and O photofragments resulting in the reformation of ground-state OClO is observed. The quantum yield for this process is …
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A comparison of three gadolinium based approaches to cancer therapy
… the element gadolinium (Gd), which produces internal conversion and Auger cascade electrons upon absorbing thermal neutrons. The low energy, nanometer-range, Auger electrons are absorbed locally and significantly increase cell killing when Gd binds to DNA. Two other methods induce Auger …
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The Automated Nuclear Spectroscopy of 194Pb.
… recent UNISOR studies of 192Pb and 196Pb decays, internal conversion coefficients of the 194Pb decay, and properties of other muclei in this mass region are used to deduce properties of several levels of the 194Tl daughter. 
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Electronic Structure Methods for the Investigation of Nonadiabatic Dynamics
… transfer, charge transfer, or other types of internal conversion in chemical systems for which Marcus theory is insufficient. These methods are then used to couplings and rates for triplet-triplet energy transfer and singlet fission systems.
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The spectroscopy and the photophysics of 1,2-benzazulene, a derivative of azulene.
… to azulene, 1,2-benzazulene also undergo rapid internal conversion from S1 to S0 bypassing T1. Also, 1,2-benzazulene and azulene have been subjected to aggregation studies for comparison. This study is to explore the differences and similarities in their spectroscopy and photophysics at higher …
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Which way did it go? Revisiting the time-resolved study of bromine atom and iodine molecule
… with the above mentioned complex undergoing an internal conversion to either the ground or 1$\rm\sp {st}$ excited state. The second transient may contain a contribution from the ground state reaction, Br+I$\sb 2$, but interference from other channels makes this transient difficult to assign. …
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Modeling non-radiative processes in solar materials
… is also investigated. They are found to undergo internal conversion gated by an excited-state conformational change, suggesting this may be a common motif. The fourth and fifth chapters investigate different interfacial effects and their impacts on the energy levels of electrons and holes in …
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Gamma-Ray Optical Studies of ⁷³Ge and ⁵⁷Fe
… time-filtering effect was investigated using the internal conversion channel. This led to the realization that the currently accepted theory explaining time-filtering is incomplete, and requires further study and experimentation.</p>
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Dynamics and mechanism of spin-state interconversion in transition metal complexes. (Volumes I and II)
The kinetics of the $\Delta$S = 2 spin-state interconversion in d$\sp6$ transition metal complexes are examined. A series of compounds having a polypyridyl-based ligand framework are described which allow for systematic modification of molecular geometry. A nanosecond time-resolved laser …
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Development and Construction of a new Photoelectron Imaging Spectrometer for Studying the Spectroscopy and Ultrafast Dynamics of Molecular Anions
… excited 1 2B3u state, which we show undergoes internal conversion back to the 2B2g ground state on a timescale of 650 fs. Results also provide evidence of a wave packet motion on the excited state, which exhibits a characteristic frequency of 30 cm–1. Finally, we describe, for the first time, a …
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Design, synthesis and characterization of photocage molecules for light-activated release: Applications in polymer chemistry and phototherapeutics
… were synthesized to minimize energy loss via internal conversion pathways like cis-trans isomerization, and charge transfer. Similarly, aryl groups with or without substitutions were introduced at proximity to trap the formed carbocation intermediate and prevent ion-pair recombination. This …
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Simulating and controlling non-adiabatic effects in ultrafast photochemistry
… We observe ultrafast decay which is a result of internal conversion occurring at the S\(_1\)/S\(_0\) conical intersection at a prefulvene geometry. These results are able to describe most of the dynamical features seen experimentally. Spin orbit coupling is generally a small, but sometimes a …
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System-on-chip-based radiation imaging system with pulse shape discrimination capability
… setup. The new method utilized a collimated internal conversion source emitting mono-energetic electrons instead of relying on the traditional method of using the photons emitted from positron annihilation to geometrically collimate the beam size on the DOI crystal. For the polished LYSO …
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