12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone
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Fine structure of the Isoscalar Giant Quadrupole Resonance and 2+ level densities in spherical to deformed nuclei across the isotope chain 142,144,146,148,150Nd using the (p,p') reaction

Presented by Mr. Chamunorwa Oscar KUREBA on 15 Jul 2011 from 08:45 to 09:00
Type: Oral Presentation
Session: NPRP
Track: Track B - Nuclear, Particle and Radiation Physics


<p>A systematic experimental investigation of the phenomenon of fine structure, with emphasis on the region of the Isoscalar Giant Quadrupole Resonance (ISGQR), in nuclei across stable even-even neodymium isotopes has been performed. Measurements were made using the K600 Magnetic Spectrometer of iThemba Laboratory for Accelerator Based Sciences, a facility which is situated at Faure near Cape Town, South Africa. Unique high energy-resolution inelastic proton scattering experiments were performed at an incident proton energy of E<sub>p</sub> = 200 MeV on targets <sup>142,144,146,148,150</sup>Nd. Nuclei with mass number A ≈ 150 and neutron number N ≈ 90 are of special interest since they occupy that region of the nuclide chart wherein the onset of permanent prolate deformation occurs. The stable neodymium (Z = 60) isotopes have been chosen in the present study, in order to investigate the effects accompanying the onset of deformation, on the excitation energy spectra in the ISGQR region (10 ≤ E<sub>x</sub> ≤ 25 MeV), since they extend from the semi-magic N = 82 nucleus (<sup>142</sup>Nd) to the permanently deformed N = 90 (<sup>150</sup>Nd) nucleus. An important further step is to test the effect that the transition from spherical to deformed nuclei has on level densities. Experimental details, data extraction and analysis techniques, together with preliminary results will be presented.

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Room: Acro8

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