Theoretical study of the deuteron + deuteron radiative capture

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In the present work, the d + d radiative capture process is studied. This process is of significant interest for astrophysical applications. The theoretical framework of the study is based on the microscopic cluster approach in the oscillator representation. The total and partial cross sections for the reaction in terms of the astrophysical S factor are calculated. A good agreement with experimental data is achieved. The tensor force of the nuclear interaction is shown to play a key role in describing the low-energy dependence of the total cross section (astrophysical S factor).

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A. Solovyev

Dukhov Automatics Research Institute (VNIIA)

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Email: solovyev@mail.ru
俄罗斯联邦, Moscow

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2. Fig. 1. Total astrophysical S-factor of the radiative capture reaction 2H(d, γ)4He. Dashed, dash-dotted with one dot, solid and dash-dotted with two dots curves are calculations within the framework of the MCPOF with tensor force intensity values ​​of 0, 1.21, 1.39 and 1.5, respectively. Experimental data: ▲ — [2], ■ — [3], ○ — [4], △ — [5], ● — [6].

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3. Fig. 2. Contributions of partial E2 transitions to the energy dependence of the total astrophysical S-factor of the 2H(d, γ)4He reaction in the MCPOF with gt = 1.39. Dashed, dash-dotted with one dot, and dash-dotted with two dots curves are transitions from the input channels 5S2, 5D2, and 5G2, respectively, to the final channel 5D0. The dotted curve is the transition from the input channel 1D2 to the final channel 1S0. The solid curve is the total astrophysical S-factor.

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