SAIP2016

Disentangling second-order effects in Coulomb Excitation Theory: (Reorientation and Nuclear Polarizability Effects)

5 Jul 2016, 16:10

1h 50m

Kramer Law building

Board: B.179

Poster Presentation Track B - Nuclear, Particle and Radiation Physics Poster Session (1)

Speaker

Mr Elijah Akakpo (University of the Western Cape)

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

We aim at disentangling the second order-effects in Coulomb Excitation (Reorientation Effect and Nuclear Polarizability). A safe coulomb excitation experiment was performed to study the nuclear polarizability and reorientation effects through measuring the spectroscopic quadrupole moment Q_s for the first 2₁⁺ in ⁴⁰ Ar. A beam of ⁴⁰Ar⁶⁺ at 134 MeV with typical currents of ≈ 0.5 to 1 nA was provided by the Cyclotron accelerator facility at iThemba Labs, which was Coulomb excited on a ≈ 1 mg ⁄ cm^{2 194}Pt target. A double sided CD-type S3 silicon detector was used to detect particles at forward angels in coincidence with γ-rays. The dexcited γ-rays from the residual nuclei were detected using the AFRODITE array (5 clover detectors at 90° and 3 at 135°). A semi-classical couple channel Coulomb Excitation code, GOSIA, will be utilized to extract the matrix element for the Q_s (2⁺) from the experimental data.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Main supervisor (name and email)<br>and his / her institution

Prof. Nico Orce
jnorce@uwc.ac.za