Probing single-particle and collective states in atomic nuclei with Coulomb excitation

Douglas DiJulio

Research output: ThesisDoctoral Thesis (compilation)

Abstract

A series of experiments and developments, related to stable and radioactive isotopes, have been carried out. These studies have focused on measuring the low-lying excitations of spherical and deformed nuclei using electromagnetic (Coulomb) excitation and also on developments in detector technology for upcoming radioactive ion beams facilities.

The low-lying excitations in the nuclei 107,109Sn and 107In have been investigated using low-energy Coulomb excitation at the REX-ISOLDE facility at CERN. The measured reduced transition probabilities were compared to predictions of nuclear structure models. In addition, a relativistic Coulomb excitation experiment was carried out using the FRS at GSI with the nucleus 104Sn. These radioactive ion beam experiments provide important constraints for large-scale-shell-model calculations in the region of the doubly magic nucleus 100Sn.

A stable Coulomb excitation experiment was also carried out in order to explore the properties of low-lying structures in the nucleus 170Er. These measurements resulted in new data for the reduced transition matrix elements in this nucleus. The results were compared to predictions of models of deformed nuclei.

The last study contained in this work is related to the design of a new detector system, to be deployed at the upcoming radioactive ion beam facility FAIR. A prototype of the detector was tested with a 180 MeV proton beam and the results were compared to Geant4 simulations. The results highlight important constraints for the design of the full detector system.
Original languageEnglish
QualificationDoctor
Awarding Institution
  • Nuclear physics
Supervisors/Advisors
  • Cederkäll, Joakim, Supervisor
Award date2013 Feb 15
Publisher
Publication statusPublished - 2013

Bibliographical note

Defence details

Date: 2013-02-15
Time: 10:15
Place: Lecture Hall B, Department of Physics, Sölvegatan 14C, Lund

External reviewer(s)

Name: Fynbo, Hans
Title: [unknown]
Affiliation: Department of Physics and Astronomy, Aarhus University

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Subject classification (UKÄ)

  • Subatomic Physics

Keywords

  • reduced matrix elements
  • radioactive ion beams
  • Coulomb excitation
  • Fysicumarkivet A:2013:Di Julio
  • detector development

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  • Coulomb Excitation of 104Sn and the Strength of the 100Sn Shell Closure

    Guastalla, G., DiJulio, D., Gorska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Sieja, K., Algora, A., Ameil, F., Arici, T., Atac, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F. & 46 others, Dombradi, Z., Domingo Pardo, C., Estrade, A., Farinon, F., Gerl, J., Goel, N., Grebosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalovic, N., Merchan, E., Moschner, K., Naqvi, F., Singh, B. S. N., Nyberg, J., Nociforo, C., Obertelli, A., Pfuetzner, M., Pietralla, N., Podolyak, Z., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Sohler, D., Swaleh, T., Taprogge, J., Vajta, Z., Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S. & Wollersheim, H. J., 2013, In: Physical Review Letters. 110, 17, 172501.

    Research output: Contribution to journalArticlepeer-review

    52 Citations (SciVal)
  • Electromagnetic Properties of Vibrational Bands in 170Er

    DiJulio, D., Cederkäll, J., Fahlander, C., Ekström, A., Golubev, P., Mattsson, K., Rudolph, D., de Angelis, G., Aydin, S., Deo, A. Y., Farnea, E., Farrelly, G., Geibel, K., He, C., Iwanicki, J., Kempley, R., Marginean, N., Menegazzo, R., Mengoni, D., Orlandi, R. & 12 others, Podolyak, Z., Recchia, F., Reiter, P., Sahin, E., Smith, J., Soderstrom, P. A., Torres, D. A., Tveten, G. M., Ur, C. A., Valiente-Dobon, J. J., Wendt, A. & Zielinska, M., 2011, In: European Physical Journal A. Hadrons and Nuclei. 47, 2, p. 25-31

    Research output: Contribution to journalArticlepeer-review

    Open Access

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