Effects of the continuum on nuclear structure

Joshua Wylie (MSU, USA)

With improvements in accelerator systems and the opening of new facilities like FRIB, new exotic nuclei will be increasingly accessible and beam rates for known exotic nuclei will allow for their better study. Exotic nuclei, characterized by their unique structures and short half-lives, are examples of Open Quantum Systems manifesting in nuclear physics. Their study requires careful respect of many physical phenomena including the continuum. This talk will focus on outlining the effect of the continuum on nuclear structure features like Spectroscopic Factors [1] and the classification of states above particle-emission threshold like those found in 9N and 9He [2]. We will also explore methods being developed to extract continuum coupling strength directly from the Gamow Shell Model to better quantify the exact strength of the continuum in various states.

[1] J. Wylie, J. Oko lowicz, W. Nazarewicz, M. P loszajczak, S. M. Wang, X. Mao, and N. Michel. Spectroscopic factors in dripline nuclei. Physical Review C, 104(6):L061301, 2021. ISSN 24699993. doi: 10.1103/PhysRevC.104.L061301. URL https://doi.org/10.1103/PhysRevC.104.L061301.
[2] R. J. Charity, J. Wylie, S. M. Wang, T. B. Webb, K. W. Brown, G. Cerizza, Z. Chajecki, J. M. Elson, J. Estee, D. E. M Hoff, et al. Strong evidence for 9N and the limits of existence of atomic nuclei. Physical Review Letters, 131(17):172501, sep 2023. doi: https://doi.org/10.1103/PhysRevLett.131.172501. URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.172501.