from 28 June 2015 to 3 July 2015 (Africa/Johannesburg)
SAIP2015 Proceeding published on 17 July 2016
Fine structure of the isovector Giant Dipole Resonance in neutron-rich calcium isotopes using the (p,p') reaction at 200 MeV
Presented by Mr. Mouftahou LATIF on 3 Jul 2015 from 11:10 to 11:30
Type: Oral Presentation
Track: Track B - Nuclear, Particle and Radiation Physics
Proton inelastic-scattering experiments have been carried out on the neutron-rich isotopes of calcium, 42,44,48Ca at zero-degrees using the high-energy resolution K600 Magnetic Spectrometer of iThemba LABS with a view to investigating the fine structure in the region of the Isovector Giant Dipole Resonance (IVGDR). Excellent energy resolutions were achieved with ∆E(FWHM)≈ 30 KeV for 44Ca and ∆E(FWHM)≈ 40 KeV for 42,48Ca leading to clear observation of fine structure thus allowing for an understanding of the damping of the resonance by comparison with state-of-the-art microscopic theoretical calculations. Double differential cross-sections have been extracted from the data obtained for each of the isotopes. Equivalent photo-absorption cross-sections were obtained from the measured data using virtual-photon production rates which agree well with those photo-absorption cross-sections already reported in the literature. In addition, preliminary results of the extracted characteristic energy scales are presented and future prospects are discussed.
Iyabo Usman (Iyabo.Usman@wits.ac.za
- Dr. Iyabo USMAN University of the Witwatersrand, Johannesburg.
- Mr. Jacobus SWARTZ Stellenbosch University
- Dr. Paul PAPKA Stellenbosch University
- Dr. Vladimir PONOMAREV Institut für kernphysik Technische Universitat, Darmstadt D-64289, Germany