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SAIP2025

7–11 Jul 2025
University of the Witwatersrand, Johannesburg
Africa/Johannesburg timezone
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SAIP2025 Conference

INVESTIGATING THE PHOTON STRENGTH FUNCTION FOR 61Cu USING 60Ni (p, γ) REACTION AT iTHEMBA LABS

10 Jul 2025, 10:50
20m
Solomon Mahlangu House (University of the Witwatersrand, Johannesburg)

Solomon Mahlangu House

University of the Witwatersrand, Johannesburg
Oral Presentation Track B - Nuclear, Particle and Radiation Physics Nuclear, Particle and Radiation Physics-1

Speaker

Mr Tshegofatso Goitseone Modise (UNIVERSITY OF BOTSWANA)

Description

INVESTIGATING THE PHOTON STRENGTH FUNCTION FOR 61Cu USING 60Ni (p, γ) REACTION AT iTHEMBA LABS

The Brink-Axel hypothesis assumes that photo-de-excitation only depends on the emitted γ-ray energy Eγ and not the detailed structure of the initial and final states (spin and parity) involved in the transition as it is the case for photo-excitation process. While the hypothesis is widely used for all PSF energy regions such as the giant dipole resonance (GDR), it remains under investigation for the low energy region [1]. In the present work, this hypothesis will be tested below the neutron separation energy, using for the first time radiative proton capture. An experiment to indirectly measure the photon strength function (PSF) took place at iThemba LABS’s Tandetron facility, to populate excited states in 61Cu utilizing 60Ni(p, γ)61Cu reaction. The model independent ratio method [2] and the shape method [3] will be used to investigate the statistical γ-ray decay to individual well established discrete states. With the neutron separation energy at 11.7 MeV, populated states with beam energies in the range 2.32-4.32 MeV will confine the study below the particle separation energy.

Data analysis is ongoing, and preliminary results will be presented.

References

  1. S. Goriely et al., Eur. Phys. J. A 55, 172 (2019).

  2. M. Wiedeking et al. Phys. Rev. Lett. 108, 162503 (2012).

  3. M. Wiedeking et al. Phys. Rev.C 104, 014311 (2021).

This research work is supported in part by the National Research Foundation (Grant No:118846, 92600, 90741, 92789 and REPSARC180529336567). It is also based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC02-05CH11231.

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Primary authors

Mr Adivhaho A Netshiya (IThemba LABS, University of Witwatersrand, Walter Sisulu University, South Africa) Dr Armand Bahini (IThemba LABS) Prof. Folurunso Ogundare (UNIVERSITY OF BOTSWANA) Jacob Bekker (University of the Witwatersrand, iThemba LABS, South Africa) Dr Kgashane Leroy Malatji (University of Califonia, Berkeley, Califonia, USA) Mr Lesedi Jafta (Physics Department, University of the Western Cape, Bellville, South Africa) Dr Lindsay Michelle Donaldson (IThemba LABS) Luna Pellegri (University of the Witwatersrand and iThemba LABS) Prof. Mathis Wiedeking (Lawrence Berkeley National Laboratory,Berkeley, Califonia, USA) Dr Nyaladzi Palalani (UNIVERSITY OF BOTSWANA) Pete Jones (iThemba LABS) Dr Philip Adsley (Department of Physics and Astronomy, Texas A&M University, College Station, Texas, USA) Ms Refilwe Emily Molaeng (School of Physics, University of the Witwatersrand, Johannesburg, South Africa) Retief Neveling (iThemba LABS) Dr Sandile Jongile (IThemba LABS) Ms Sebenzile P.E Magagula (IThemba LABS, School of Physics, University of the Witwatersrand, Johannesburg, South Africa) Shanyn Hart (University of Cape Town and iThemba LABS) Mr Sifundo D Binda (School of Physics, University of the Witwatersrand, Johannesburg, South Africa) Dr Thuthukile Khumalo (NRF-iThemba LABS) Mr Tshegofatso Goitseone Modise (UNIVERSITY OF BOTSWANA) Dr Vincent. B Kheswa (IThemba LABS, Department of Applied Physics and Engineering Mathematics, University of Johannesburg, South Africa)

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