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A particle-gamma coincidence study of 26Na using the transfer reaction 25Na(d,p gamma) 26Na

Celik, Ilker C. (2014) A particle-gamma coincidence study of 26Na using the transfer reaction 25Na(d,p gamma) 26Na University of Surrey.

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Abstract

In this thesis, the radioactive beam (RIB) 25Na at 5 MeV/u with an intensity of up to 3 times 107 pps is exploited to study states in 26Na using a 0.5 mg/cm2 deuterated polyethylene (CD2) target via the highly selective (d,p gamma) 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 gamma detection in 25Na(d,p gamma) 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 gamma-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 gamma-ray decay scheme, and (6) analogies with the experimentally observed gamma-decay properties of the isotone 28Al. An extra new feature of this work, for the important interpretation of similar future experiments, is a detailed study of the gamma-ray angular distributions and their dependence upon the scattered proton angles in (d,p).

Item Type: Other
Divisions : Theses
Authors :
AuthorsEmailORCID
Celik, Ilker C.ilkercan0066@gmail.comUNSPECIFIED
Date : 1 September 2014
Funders : The Republic of Turkey Ministry of National Education
Contributors :
ContributionNameEmailORCID
Thesis supervisorCatford, Wiltonw.catford@surrey.ac.ukUNSPECIFIED
Depositing User : Ilker Celik
Date Deposited : 04 Feb 2015 17:01
Last Modified : 04 Feb 2015 17:05
URI: http://epubs.surrey.ac.uk/id/eprint/807156

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