Three-body vs. dineutron approach to two-neutron radiative capture in He
| Autor: | Grigorenko, L.V., Shulgina, N.B., Zhukov, M.V. |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Zdroj: | Physics Letters |
| Popis: | The low-energy behavior of the strength function for the 1− soft dipole excitation in $^{6}$He is studied theoretically. Use of very large basis sizes and well-grounded extrapolation procedures allows to move to energies as small as 1 keV, at which the low-energy asymptotic behavior of the E1 strength function seems to be achieved. It is found that the low-energy behavior of the strength function is well described in the effective three-body “dynamical dineutron model”. The astrophysical rate for the α+n+n→6He+γ is calculated. Comparison with the previous calculations is performed. |
| Databáze: | OpenAIRE |
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