Programme

P.30 -- Posters, VCTP-50

Date: Tuesday, 5 August 2025

Time: 08:30 - 10:00

Collective excited states at small amplitude in neutron elastic scattering at low-energies

Do Quang Tam (1,2,3), Nguyen Hoang Tung (4), Nguyen Hoang Phuc (5,6), T. V. Nhan Hao (2,3)

(1) Faculty of Basic Sciences, University of Medicine and Pharmacy, Hue University, Hue City 52000, Vietnam; (2) Department of Physics, University of Education, Hue University, Hue City 52000, Vietnam; (3) Center for Theoretical and Computational Physics, University of Education, Hue University, Hue City 52000, Vietnam; (4) Interdisciplinary Research Center for Industrial Nuclear Energy (IRC-INE), KFUPM, Dhahran, Saudi Arabia; (5) Department of Applied Physics, Faculty of Applied Science, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam; (6) Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam.

We investigate the contributions of isoscalar and isovector collective excitations in the neutron elastic scattering of 16O, 40Ca, 48Ca, and 208Pb nuclei by using a microscopic optical potential (MOP) derived from nuclear structure models based on self-consistent mean-field approaches. Particular attention is given to the role of these collective modes in shaping the imaginary part of the MOP and the resulting angular distributions. Our analysis indicates that both isoscalar and isovector contributions are significant for all considered targets, especially for light and medium targets. Furthermore, the Coulomb interaction is found to play an important role in describing absorption mechanisms and reproducing the experimental angular distributions [1]. [1] submitted to Physical Review C (2025).

Presenter: Do Quang Tam