Study of nonlocality effects in direct capture reactions with Lagrange-mesh R-matrix method

World Scientific Pub Co Pte Lt - Tập 30 Số 09 - 2021
Nguyen Hoang Phuc1,2,3, Nguyen Tri Toan Phuc1,2,3, Do Cong Cuong1,2,3
1Department of Nuclear Physics, Faculty of Physics and Engineering Physics, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Viet Nam
2Institute for Nuclear Science and Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Viet Nam
3Vietnam National University Ho Chi Minh City, Viet Nam

Tóm tắt

We apply the Lagrange-mesh [Formula: see text]-matrix method to calculate the [Formula: see text]-factor for the [Formula: see text]C[Formula: see text]N and [Formula: see text]O[Formula: see text]F direct radiative capture reactions. By comparing the astrophysical [Formula: see text]-factors calculated with nonlocal and local potentials, we investigate the nonlocality effects coming from the nuclear potentials in the direct capture reactions. Our calculations are in good agreement with the experimental data and indicate a nonnegligible difference in the results of local and nonlocal potentials. The use of small diffuseness narrow potentials also provides a remarkably good fit in the case with multiple broad resonances. Our findings suggest that the nonlocal potential improves the calculated results although the difference between the local and nonlocal potentials is smaller than uncertainties from other sources. We propose the nonlocality potential should be used in the potential model calculation of future astrophysics rates evaluation.

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World Scientific Pub Co Pte Lt

Tập 30 Số 09

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