Coupled-channels calculations for nuclear reactions: From exotic nuclei to superheavy elements

Hagino, K.; Ogata, Kazuyuki; Moro, A. M.

doi:10.1016/j.ppnp.2022.103951

Cited by 36 publications

(9 citation statements)

References 356 publications

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“…In an alternative approach, one may treat the reaction in an extended three-body model, comprising of the two-body projectile (α+ 3 He) plus the target, similar to that used in the continuum discretized coupled-channels (CDCC) calculations [30]. In this model, target excitations are included by means of deformed 3 He+ 12 C and 4 He+ 12 C potentials.…”

Section: Resultsmentioning

confidence: 99%

Study of elastic and inelastic scattering of $^7$Be + $^{12}$C at 35 MeV

Kundalia,

Gupta,

Ali

et al. 2022

Preprint

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The elastic and inelastic scattering of 7 Be from 12 C have been measured at an incident energy of 35 MeV. The inelastic scattering leading to the 4.439 MeV excited state of 12 C has been measured for the first time. The experimental data cover an angular range of θcm = 15 • -120 • . Optical model analyses were carried out with Woods-Saxon and double-folding potential using the density dependent M3Y (DDM3Y) effective interaction. The microscopic analysis of the elastic data indicates breakup channel coupling effect. A coupled-channel analysis of the inelastic scattering, based on collective form factors, show that mutual excitation of both 7 Be and 12 C is significantly smaller than the single excitation of 12 C. The larger deformation length obtained from the DWBA analysis could be explained by including the excitation of 7 Be in a coupled-channel analysis. The breakup cross section of 7 Be is estimated to be less than 10% of the reaction cross section. The intrinsic deformation length obtained for the 12 C * (4.439 MeV) state is δ2 = 1.37 fm. The total reaction cross section deduced from the analysis agrees very well with Wong's calculations for similar weakly bound light nuclei on 12 C target.

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Section: Resultsmentioning

confidence: 99%

Study of elastic and inelastic scattering of $^7$Be + $^{12}$C at 35 MeV

Kundalia,

Gupta,

Ali

et al. 2022

Preprint

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“…We contemplate a sequential two neutron transfer for the formation of 6 He via the reaction 18 O( 4 He, 6 He) 16 O. The first step is a one neutron transfer reaction forming 5 He and leaving an intermediary 17 O nucleus.…”

Section: One-neutron Transfermentioning

confidence: 99%

“…As a consequence, the existence of diffused halos and the possibility of Cooper pairs scattering into the continuum can affect the character of short-range correlations [11]. As the particles gain energy and excite to higher energy levels due to the introduction of additional correlations to simple mean field models, the role and inclusion of the continuum then becomes indispensable [12,13,14,15,16,17], especially if breakup or transfer channels are dominant. However, the wave functions of these continuum states are not square integrable and hence, one loses the convergence and orthonormality conditions in most cases, making the continuum considerations a non-trivial task for most investigations.…”

Section: Introductionmentioning

confidence: 99%

Pairing enhancement in a two-neutron transfer process through the continuum

Singh¹,

Fortunato²,

Vitturi³

2022

Preprint

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Enhancement, due to constructive interference through the many possible reaction channels, occurs in two-neutron transfer reactions from a bound system A to a weakly-bound system (A+2), whenever the intermediate system is unbound and consists of a continuum with a resonant state. We elucidate this phenomenon in the case of 6 He, modeled as two neutrons in the orbitals of an intermediate 5 He nucleus, comparing the realistic case of an unbound (A+1) system with an artificially bound case. A properly modeled continuum in these calculations is found to be crucial and leads to significant enhancement due to pairing correlations.

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“…The corresponding paradigm shift in the theory of nuclear structure has to be complemented by a revision of nuclear reaction theory, needed for the description of the experiments in which radioactive ions are involved. Within this context, a considerable effort has been devoted recently to the description of reactions with weakly-bound nuclei [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Green's Function Knockout Formalism

Hebborn¹,

Potel²

2022

Preprint

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Knockout nuclear reactions, in which a nucleon is removed from a nucleus as a result of the collision with another nucleus, have been widely used as an experimental tool, both to populate isotopes further removed from stability, and to obtain information about the single-particle nature of the nuclear spectrum. In order to fully exploit the experimental information, theory is needed for the description of both the structure of the nuclei involved, and the dynamics associated with the nucleon removal mechanisms. The standard approach, using theoretical shell-model spectroscopic factors for the structure description coupled with an eikonal model of reaction, has been successful when used in the context of the removal of valence nucleons in nuclei close to stability. However, it has been argued that the reaction theory might need to be revisited in the case of exotic nuclei, more specifically for highly asymmetric nuclei in which the deficient species (neutrons or protons) is being removed. We present here a new formalism for the nucleon-removal and -addition reaction through knockout and transfer reactions, that treats consistently structure and reaction properties using dispersive optical potentials. In particular, our formalism includes the dynamical effects associated with the removal of a neutron from the projectile, which might explain the long standing puzzle of the quenching of spectroscopic factors in nuclei with extreme neutrons-to-protons ratios.

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Coupled-channels calculations for nuclear reactions: From exotic nuclei to superheavy elements

Cited by 36 publications

References 356 publications

Study of elastic and inelastic scattering of $^7$Be + $^{12}$C at 35 MeV

Study of elastic and inelastic scattering of $^7$Be + $^{12}$C at 35 MeV

Pairing enhancement in a two-neutron transfer process through the continuum

Green's Function Knockout Formalism

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