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Title: A particle-γ coincidence study of 26Na using the transfer reaction 25Na(d,pγ)26Na
Author: Celik, Ilker Can
ISNI:       0000 0004 8509 7787
Awarding Body: University of Surrey
Current Institution: University of Surrey
Date of Award: 2014
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In this thesis, the radioactive beam (RIB) 25Na at 5 MeV/u with an intensity of up to 3 x 107 pps is exploited to study states in 26Na using a 0.5mg/cm2 deuterated polyethylene (CD2) target via the highly selective (d, pγ) transfer reaction. The reaction products are recorded by using both SHARC (the Silicon Highly-segmented Array for Reactions and Coulex) and TIGRESS (The TRIUMF-ISAC Gamma-Ray Escape-Suppressed Spectrometer). The SHARC array is installed at the ISAC-2 facility in TRIUMF (Canada) to study a variety of reactions, but single-particle transfer with a radioactive ion beam is the reaction mechanism of interest here. This experimental study was the first radioactive beam experiment making use of the TIGRESS/SHARC detector set-up in 2009. This work significantly extends an earlier analysis. The motivation of this work is to combine the information extracted from the particle and the y detection in 25Na(d, pγ)26Na reaction data to compare the experimentally observed results and the shell model predictions. A total of 24 states were studied, of which 10 had not been reported previously, and detailed new information was extracted for most of these. Properties measured and discussed include: (1) the observed 7-ray decay branching ratios, (2) the observed spectroscopic factors (population strength) in the (d, p) reaction, (3) the observed angular momentum transfer in the (d, p) reaction, (4) a comparison between experimental and the predicted excitation energies from shell model calculations, (5) spin assignments based on the predicted reaction strengths and observed γ-ray decay scheme, and (6) analogies with the experimentally observed gamma-decay properties of the isotone 28 Al. An extra new feature of this work, for the important interpretation of similar future experiments, is a detailed study of the γ-ray angular distributions and their dependence upon the scattered proton angles in (d,p).
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available