4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

Investigating the Gamma-Ray Strength Function in 74Ge using the Ratio Method

5 Jul 2016, 16:10
1h 50m
Kramer Law building

Kramer Law building

UCT Middle Campus Cape Town
Board: B.063
Poster Presentation Track B - Nuclear, Particle and Radiation Physics Poster Session (1)

Speaker

Mr Khanyisa Sowazi (University of the Western Cape)

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

MSc

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (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>

As excitation energy increases from the ground state towards the separation energy, the density of nuclear states increases exponentially. In this region of high level density, called the quasi-continuum, it is impossible to distinguish between individual states, since the level spacing becomes very small and in some cases the levels can even overlap. This is the regime where nuclear properties are best described by statistical quantities. As such, the gamma-ray strength function, which is the ability of atomic nuclei to emit and absorb photons with energy Eγ, is a measure of the probability for an excited nucleus to decay to low-lying states. These gamma-ray strength functions are input parameters to calculate cross sections such as (n,γ) and (p,γ) which are vital to improve our understanding on how elements are generated in astrophysical processes. I will present preliminary results of our research focusing on 74Ge, populated in the 74Ge(p,p’) reaction at a beam energy of 18MeV. The data was collected with the STARS-LIBERACE array at Lawrence Berkeley National Laboratory. Silicon detector telescopes were used for particle identification and gamma rays in coincidence were detected in 5 Clover-type high-purity germanium detectors. The gamma-ray strength function of 74Ge is extracted through the recently established Ratio Method [1] and will be discussed in the context of other work done in 74Ge using the (γ,γ’) [2], (3He,3He’) [3] and (α,α’) [4] reactions.

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

Yes

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

Yes

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

Mathis Wiedeking2
wiedeking@tlabs.ac.za
iThemba LABS

Primary authors

Mr Khanyisa Sowazi (University of the Western Cape) Dr Mathis Wiedeking (iThemba LABS)

Co-authors

Dr Aaron Hurst (Lawrence Berkeley National Laboratory, USA) Dr Andreas Gorgen (University of Oslo, Norway) Dr Bethany Goldblum (University of Califonia, USA) Dr Bongani Kheswa (University of Oslo, Norway) Dr Darren Bleuel (Lawrence Livermore National Laboratory, USA) Dr Jason Burke (Lawrence Livermore National Laboratory, USA) Dr Jo Ressler (Lawrence Livermore National Laboratory, USA) Dr John Koglin (Lawrence Livermore National Laboratory, USA) Dr Lee Bernstein (Lawrence Livermore National Laboratory, USA) Dr Lily Crabtree (University of Tennessee, USA) Dr Maria Petri (Lawrence Berkeley National Laboratory, USA) Prof. Nico Orce (University of the Western Cape) Dr Paul Papka (Stellenbosch University) Dr Robert Hatarik (Lawrence Livermore National Laboratory, USA) Dr Scielzo Nick (Lawrence Livermore National Laboratory, USA) Dr Stefanos Paschalis (Lawrence Berkeley National Laboratory, USA) Dr Sunniva Siem (University of Oslo, Norway) Dr Tim Reed (University of Tennessee, USA)

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