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pro vyhledávání: '"Deltuva, A."'
The $^{12}$C(p,2p)$^{11}$B reaction at $E_p =98.7$ MeV proton beam energy is analyzed using a rigorous three-particle scattering formalism extended to include the internal excitation of the nuclear core or residual nucleus. The excitation proceeds vi
Externí odkaz:
http://arxiv.org/abs/2407.03800
Autor:
Deltuva, A.
Proton-deuteron elastic scattering is considered in the framework of momentum-space Faddeev equations with the screening method for the Coulomb interaction. It is shown how the interplay of the proton-proton Coulomb potential and the deuteron pole in
Externí odkaz:
http://arxiv.org/abs/2311.14605
Autor:
Deltuva, A., Jurčiukonis, D.
Nonlocal nucleon-nucleus optical potential with rotational quadrupole deformation enabling the excitation of the ${}^{24}\mathrm{Mg}(2^+)$ state is developed; it fits well the proton-${}^{24}\mathrm{Mg}$ elastic and inelastic differential cross secti
Externí odkaz:
http://arxiv.org/abs/2305.13890
Autor:
Deltuva, A., Jurčiukonis, D.
Publikováno v:
Physics Letters B 840, 137867 (2023)
We propose a new nonlocal form of the nucleon-nucleus optical potential and demonstrate its reliability. We extend the nonlocal potential to include the excitation of the nuclear core and develop energy-independent roton-${}^{10}\mathrm{Be}$ potentia
Externí odkaz:
http://arxiv.org/abs/2302.04837
Autor:
Deltuva, A.
Publikováno v:
Physics Letters B 835 (2022) 137552
The electrodisintegration of ${}^3\mathrm{He}$ is considered focusing on the effects of the $\Delta$ isobar excitation which is treated dynamically on the same footing as nucleons. In the region beyond the quasi-elastic peak the predicted transverse
Externí odkaz:
http://arxiv.org/abs/2211.12413
Autor:
Deltuva, A., Sauer, P. U.
Publikováno v:
Physical Review C 91, 034002 (2015)
The three-nucleon bound and scattering equations are solved in momentum space for a coupled-channel Hamiltonian. The Hamiltonian couples the purely nucleonic sector of Hilbert space with a sector in which one nucleon is excited to a $\Delta$ isobar.
Externí odkaz:
http://arxiv.org/abs/2209.04855
Autor:
Deltuva, A.
The strong short-range repulsion, characteristic to realistic interatomic potentials, complicates the description of weakly-bound few-body systems such as those of \He atoms. The present work proposes an approach for solving this problem and applies
Externí odkaz:
http://arxiv.org/abs/2202.12629
Autor:
Deltuva, A.
Four-boson Efimov physics is well known in the negative energy regime but far less above the four-body breakup threshold. The part of this region with negative two-boson scattering length is studied solving rigorous four-particle scattering equations
Externí odkaz:
http://arxiv.org/abs/2106.01458
Autor:
Deltuva, A.
Publikováno v:
Physics Letters B 820 (2021) 136599
In the systems of spin $\frac12$ fermions with resonant $S$-wave interactions supporting only weakly bound dimers the antisymmetry forbids recombination of three (or more) fermions at zero energy. However, the fermion-fermion-dimer recombination is o
Externí odkaz:
http://arxiv.org/abs/2105.09033
Publikováno v:
Phys. Rev. A 104, 023306 (2021)
We consider the system of three ${}^4$He atoms to assess whether a pure van der Waals potential can be used as a starting point for an effective field theory to describe three-body processes in ultracold atomic systems. Using a long-range van der Waa
Externí odkaz:
http://arxiv.org/abs/2105.03442