Speaker
Description
The Oslo Cyclotron Laboratory (OCL) at the University of Oslo is developing a comprehensive experimental program focused on advancing our understanding of nuclear fission. Leveraging the existing cyclotron infrastructure and state-of-the-art detection systems such as OSCAR [1, 2], this program aims to investigate prompt fission gamma emission and the interplay between nuclear structure and fission mechanisms in the actinide systems.
A central component of the program is the development of a fission chamber setup equipped with newly developed scintillation-based fission fragment detectors [3, 4] and the detection of gamma rays in coincidence with fission fragments. The available beams of p, d, and alpha particles at the OCL provide the opportunity to perform particle-induced fission reactions. A study performed with conventional fission gas detectors in the past highlighted the capability to study structural features in PFGS and their evolution with excitation energy [5], which was possible to measure using the charged particle setup SiRi [6]. In a significant advancement, the highly segmented S2 detectors will be used to detect charged particles with even better precision, enabling further enhancement in the resolution of the excitation energy of the fissioning system. By combining multi-detector arrays with advanced data acquisition and analysis frameworks, we aim to constrain theoretical models of fission and improve predictive capabilities relevant for both fundamental nuclear science and applied domains.
This presentation will outline the scientific goals of the OCL fission program, describe the experimental setups under commissioning, and discuss preliminary results from pilot studies. In addition, we will highlight planned collaborations within the Nordic research community and opportunities for joint activities that can enhance the collective research impact on emerging questions in fission.
References
[1] F. Zeiser, et al., Nucl. Instrum.Meth. A 985, (2021) 164678.
[2] V. W., Ingeberg et al., Under production and soon to be submitted.
[3] M. Hunyadi et al., Adv. Photonics Res. 2025, 2400217.
[4] M. Hunyadi et al., Adv. Funct. Mater. 2022, 32, 2206645
[5] D. Gjestvang et al., Phys. Rev. C 103, (2021) 034609.
[6] M. Guttormsen et al., Nucl. Instrum. Methods Phys. Res. A 648, (2011) 168–173.