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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Generator Matrix Elements for Noncompact Sp(6) in a Sp(2) X 0(3) Basis

Niculescu-Sanielevici, Mihaela 02 1900 (has links)
No description available.
22

Non-eikonal corrections to nuclear few-body scattering models

Brooke, J. M. January 1999 (has links)
No description available.
23

[Part] I. Beta-spectroscopic studies in the promethium region.

Marshall, Thomas V. January 1960 (has links)
Thesis--University of California, Berkeley, 1960. / "Chemistry General" -t.p. Includes bibliographical references (p. 70-73).
24

Evolucao do combustivel nuclear em reatores do tipo HTGR

OLIVEIRA FILHO, JOSE M. de 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:23:33Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:57:22Z (GMT). No. of bitstreams: 1 00324.pdf: 3506156 bytes, checksum: 9eb6171d89823f121dea681a04c09c5a (MD5) / Dissertacao (Mestrado) / IEA/D / Instituto de Fisica, Universidade de Sao Paulo - IF/USP
25

Evolucao do combustivel nuclear em reatores do tipo HTGR

OLIVEIRA FILHO, JOSE M. de 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:23:33Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:57:22Z (GMT). No. of bitstreams: 1 00324.pdf: 3506156 bytes, checksum: 9eb6171d89823f121dea681a04c09c5a (MD5) / Dissertacao (Mestrado) / IEA/D / Instituto de Fisica, Universidade de Sao Paulo - IF/USP
26

Thermal and chemical aspects of the thermonuclear blanket problem.

January 1965 (has links)
Bibliography: p. 111-114.
27

Correlacoes angulares gama-gama no nucleo sup(84) Kr

JAHNEL, LUCIA C. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:29:11Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:02:41Z (GMT). No. of bitstreams: 1 00973.pdf: 3680396 bytes, checksum: 62f3f85a25ae91726723f130884f9345 (MD5) / Dissertacao (Mestrado) / IEA/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
28

Correlacoes angulares gama-gama no nucleo sup(84) Kr

JAHNEL, LUCIA C. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:29:11Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:02:41Z (GMT). No. of bitstreams: 1 00973.pdf: 3680396 bytes, checksum: 62f3f85a25ae91726723f130884f9345 (MD5) / Dissertacao (Mestrado) / IEA/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
29

Etude de la fragmentation du ¹²C pour la hadronthérapie / Study of¹²C fragmentation for hadrontherapy

Divay, Clovis 04 October 2017 (has links)
Lors du traitement d'une tumeur par radiothérapie utilisant des ions comme le 12C, le faisceau peut subir des réactions nucléaires avec les noyaux des tissus menant à la création de particules secondaires plus légères. Cela a pour conséquences de délocaliser une partie de la dose dans les tissus sains et de créer un champ d'irradiation mixte. Afin d'améliorer les connaissances sur la fragmentation du projectile, une expérience a été réalisée par notre collaboration en Mars 2015 au GANIL avec un faisceau de 12C à 50 MeV/n. Cette expérience a permis de mesurer les sections efficaces doublement différentielles en angle et en énergie pour tous les isotopes créés, et ce, sur différentes cibles d'intérêt médical (C, H, O et Ca). Les distributions angulaires et les taux de production ont également été obtenus pour chaque fragment et pour chaque cible. Les résultats ont ensuite été comparés à différents modèles de réactions nucléaire disponibles dans les outils de simulation Monte Carlo GEANT4 et PHITS. Des écarts importants ont été observés avec les résultats expérimentaux, mais aussi entre les différents modèles. Ces conclusions avaient déjà poussé notre collaboration à créer un nouveau modèle, appelé SLIIPIE, spécialisé dans les réactions d'ions légers aux énergies intermédiaires. Les paramètres de ce modèle ont ainsi été ajustés de façon à reproduire au mieux les données expérimentales obtenues. / During the treatment of cancerous diseases using ions such as 12C, the beam will undergo nuclear reactions with the tissues leading to the production of lighter secondary fragments. This tends to delocate a part of the dose into healthy tissues and create a mixed radiation field. In order to improve the knowledge on the projectile fragmentation, an experiment was performed by our collaboration in March 2015 with a 50 MeV/n 12C beam at GANIL. This led to the measurement of double differential cross sections in angle and energy of every isotope created by the fragmentation of carbon on targets of medical interest (C, H, O and Ca). Energy and angular distributions, as well as production rates have also been obtained for every fragment and every target. Experimental data were then compared with nuclear reaction models included in the Monte-Carlo (MC) simulation codes, GEANT4 and PHITS. Important discrepancies were observed with our data, as well as between models. These observations had already led our collaboration in creating a new MC model called SLIIPIE, specialized in intermediate energies reactions with light ions. The parameters of this model were then adjusted in order to best fit the experimental data.
30

Alpha cluster structure and scattering in 20Ne, 44Ti, 94Mo, 136Te and 212Po

Ndayishimye, Joram 03 1900 (has links)
Thesis (MSc)--University of Stellenbosch, 2011. / ENGLISH ABSTRACT: We investigate the nuclei 20Ne, 44Ti, 94Mo, 136Te and 212Po using a model of an α-cluster orbiting a closed shell core. A purely phenomenological cluster-core potential is found to provide a successful description of the spectra, B(E2↓) transition strengths, and α-decay rates of the low-lying positive parity states of these nuclei. We then use the same potential as the real part of an optical model potential to describe the α elastic scattering by 16O, 40Ca, 90Zr and 208Pb. The experimental differential cross-section data are reasonably well reproduced with the imaginary potential depth as the only free parameter. The special case of the 8Be system is also analysed. / AFRIKAANSE OPSOMMING: Ons ondersoek die kerne 20Ne, 44Ti, 94Mo, 136Te en 212Po deur gebruik te maak van ’n model waar ’n α-bondel om ’n kern met ’n geslote skil wentel. ’n Suiwer fenomenologiese bondelkern potentiaal is gevind wat die energie spektra, B(E2 ↓) oorgangs sterktes, en α-verval tempo vir laagliggende positiewe pariteitstoestande vir hierdie kerne beskryf. Ons gebruik dieselfde potentiaal as die reele deel van die optiese potentiaal om die alpha elastiese verstrooiing deur die kerne 16O, 40Ca, 90Zr en 208Pb te beskryf. Die eksperimentele differensiele kansvlak data word redelik goed gereprodukseer met slegs die imaginere potensiaal diepte as die enigste vrye parameter. Die spesiale geval van 8Be is ook ondersoek.

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