Resolution of resonances with the Lorentz integral transform
1 Dipartimento di Fisica, Università di Trento, I-38123 Trento, Italy
2 Istituto Nazionale di Fisica Nucleare, TIFPA, I-38123 Trento, Italy
a e-mail: firstname.lastname@example.org
Published online: 25 March 2016
The energy resolution of cross sections calculated with the Lorentz integral transform (LIT) method is investigated. It is shown that a crucial role is played by the density of LIT states obtained in the calculation. The situation is illustrated for the simple case of deuteron photodisintegration in unretarded dipole approximation. In a next step the 4He isoscalar monopole resonance is considered. It is pointed out that in a specific energy interval the density of LIT states may depend on the A-body basis chosen for the solution of the LIT equation. Using a central NN potential and choosing a proper A-body basis set it is shown that the width of the 4He isoscalar monopole resonance can be determined. A value of 180(70) keV is obtained, which is close to the experimental value of 270(50) keV.
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