<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">O</mml:mi><mml:mprescripts/><mml:none/><mml:mn>18</mml:mn></mml:mmultiscripts><mml:mo>+</mml:mo><mml:mmultiscripts><mml:mi>Se</mml:mi><mml:mprescripts/><mml:none/><mml:mn>76</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>
 elastic and inelastic scattering at 275 MeV

Fauci, L. La; Spatafora, A.; Cappuzzello, F.; Agodi, C.; Carbone, D.; Cavallaro, M.; Lubián, J.; Acosta, L.; Amador-Valenzuela, P.; Borello‐Lewin, T.; Brischetto, G. A.; Calabrese, Salvatore; Calvo, D.; Capirossi, V.; Lomelí, E.R. Chávez; Ciraldo, I.; Cutuli, M.; Delaunay, F.; Djapo, H.; Eke, Canel; Finocchiaro, P.; Firat, S.; Fisichella, M.; Foti, A.; Guazzelli, Marcilei A.; Hacisalihoglu, A.; Iazzi, F.; Linares, R.; Ma, J.; Medina, N. H.; Moralles, M.; Oliveira, J. R. B.; Pakou, A.; Pandola, L.; Petrascu, H.; Pinna, F.; Ries, P.; Russo, G.; Sgouros, O.; Solakcı, S. O.; Soukeras, V.; Souliotis, G. A.; Torresi, D.; Tudisco, S.; Wang, J.; Yang, Y. Y.; Yildirin, A.; Zagatto, V. A. B.

doi:10.1103/physrevc.104.054610

Cited by 19 publications

(4 citation statements)

References 60 publications

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“…For the initial partition, the Coulomb and nuclear deformations for 18 O and 76 Se are obtained from reduced transition probabilities B(E2) taken from experimental data [91], as described in Ref. [80]. They are similar to those obtained from shell-model calculations, as given in Table V.…”

Section: Reaction Calculationsmentioning

confidence: 99%

“…The optical potentials for the ingoing and outgoing partitions were chosen according to the elastic and inelastic scattering analysis of the 18 O + 76 Se collision at the same energy described in Ref. [80]. The distorted waves at the entrance and exit channels were generated adopting the double-folding São Paulo potential for the description of both the real and imaginary parts of the optical potential.…”

Section: Reaction Calculationsmentioning

confidence: 99%

“…Thus, the couplings to inelastic states are introduced through the reduced matrix elements M(E2) together with the corresponding deformation lengths δ 2 defined in Refs. [23,80,85], calculated by shell model and listed in Table VIII (appendix A). Final partition couplings are introduced only for the transitions characterized by the largest cross section.…”

Section: Reaction Calculationsmentioning

confidence: 99%

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Analysis of one-neutron transfer reaction in $^{18}$O + $^{76}$Se collision at 275 MeV

Ciraldo,

Cappuzzello,

Cavallaro

et al. 2022

Preprint

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Background: Heavy-ion one-nucleon transfer reactions are promising tools to investigate single-particle configurations in nuclear states, with and without the excitation of the core degrees of freedom. A careful determination of the spectroscopic amplitudes of these configurations is essential for the accurate study of other direct reactions as well as beta-decays. In nucleon transfer reactions core excitations, for both target and projectile systems, are best approached via coupled channel reaction schemes. Despite being notoriously demanding in terms of computing resources, coupled channel analyses are progressively becoming more affordable even within model spaces large enough for tackling medium mass nuclei. In this context, the 76 Se( 18 O, 17 O) 77 Se reaction, here under study, gives a quantitative access to the relevant single particle orbitals and core polarization configurations built on 76 Se. This is particularly relevant, since it provides data-driven information to constrain nuclear structure models for 76 Se, which is the daughter nucleus in the 76 Ge double beta decay. This reaction is one of the systems studied in the frame of the NUMEN project.Purpose: We want to analyze transitions to low-lying excited states of the residual and ejectile nuclei in the 76 Se( 18 O, 17 O) 77 Se one-neutron stripping reaction at 275 MeV incident energy and determine the role of singleparticle and core-excitation in the description of the measured cross sections. In addition, we explore the sensitivity of the calculated cross section to different nuclear structure models. Methods:The excitation energy spectrum and the differential cross section angular distributions are measured using the MAGNEX large acceptance magnetic spectrometer for the detection of the ejectiles and the missing mass technique for the reconstruction of the reaction kinematics. The data are compared with calculations based on distorted wave Born approximation, coupled channel Born approximation and coupled reaction channels adopting spectroscopic amplitudes for the projectile and target overlaps derived by large-scale shell model calculations and interacting boson-fermion model.Results: Peaks in the energy spectra corresponding to groups of unresolved transitions to 77 Se and 17 O are identified. The experimental cross sections are extracted and compared to theoretical calculations. A remarkable agreement is found, without using any scaling factors, demonstrating that the adopted models for nuclear structure and reaction take into account the relevant aspects of the studied processes. The main transitions which contribute to the cross section of each peak are identified. Conclusions: The coupling with the inelastic channels feeding states in entrance and exit partitions is important in the one-neutron transfer reaction and should be accounted for in future analyses of other direct reactions such as single and double charge exchange processes involving 76 Se isotope. The description of 77 Se indicates the need of a large model space, in the view...

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Section: Reaction Calculationsmentioning

confidence: 99%

Section: Reaction Calculationsmentioning

confidence: 99%

Section: Reaction Calculationsmentioning

confidence: 99%

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Analysis of one-neutron transfer reaction in $^{18}$O + $^{76}$Se collision at 275 MeV

Ciraldo,

Cappuzzello,

Cavallaro

et al. 2022

Preprint

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“…For instance, the nucleus-nucleus potential should be in principle specifically modeled for the projectile-target system under investigation. However, recent studies have shown that, in the energy region of our interest, a satisfactory reproduction of the scattering cross sections is achieved for a wide range of masses under suitable general prescriptions [23,[36][37][38][39]. It is nonetheless important to validate this strategy for each system under investigation and, in this context, the experimental measurement and analysis of the elastic and inelastic scattering is thus crucial to constrain the SCE and DCE calculations.…”

Section: Introductionmentioning

confidence: 99%

Multichannel experimental and theoretical constraints for the Cd116(Ne20,F20
Burrello¹,
Calabrese²,
Cappuzzello³
et al. 2022
Phys. Rev. C
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Background: Charge-exchange (CE) reactions offer a major opportunity to excite nuclear isovector modes, providing important clues about the nuclear interaction in the medium. Moreover, double charge-exchange reactions are proving to be a tempting tool to access nuclear transition matrix elements (NMEs) related to double beta-decay processes. The latter are also of crucial importance to extract neutrino properties from the half-life of the hypothetical neutrinoless double beta decay and to search for physics beyond the standard model. Purpose: Through a multichannel experimental analysis and a consistent theoretical approach of the 116 Cd( 20 Ne, 20 F) 116 In single charge-exchange (SCE) reaction at 306 MeV, we aim at disentangling from the experimental cross section the contribution of the competing mechanisms associated with second-or higherorder sequential transfer and/or inelastic processes. Methods: We measured excitation energy spectra and absolute cross sections for elastic + inelastic, one-proton transfer and SCE channels by using the MAGNEX large acceptance magnetic spectrometer to detect the ejectiles. For the first two channels, we also extracted the experimental cross-section angular distributions. The experimental data are compared with theoretical predictions obtained by performing two-step distortedwave Born approximation and coupled reaction channel calculations. We employ spectroscopic amplitudes for single-particle transitions derived within a large-scale shell-model approach and different optical potentials for modeling the initial-and the final-state interactions. Results: The present study significantly mitigates the possible model dependence existing in the description of these complex reaction mechanisms thanks to the satisfactory reproduction of several channels at once. In particular, our work demonstrates that the two-step transfer mechanisms produce a non-negligible contribution to the total cross section of the 116 Cd( 20 Ne, 20 F) 116 In reaction channel, although a relevant fraction is still missing, being ascribable to the direct SCE mechanism, which is not addressed here.

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Modeling Double Charge Exchange processes occurring in Heavy Ion Reactions

Bellone,

Colonna,

Gambacurta

et al. 2024

EPJ Web Conf.

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Heavy ion induced double charge exchange reactions are treated as an incoherent sequence of two reactions driven by the exchange of charged mesons (double single charge exchange, DSCE). The process is described within a fully quantum mechanical distorted wave 2-step theory (2nd order DWBA). The DSCE reaction amplitudes are shown to be separable into superpositions of distortion factors, accounting for initial and final state ion-ion elastic interactions, and nuclear matrix elements (NMEs). Explicit expressions of projectile and target NMEs are derived within the QRPA theory. Reduction schemes for the DSCE transition form factors are described, analizing their momentum structure within the closure approximation. Formal analogies between the NMEs involved in DSCE reactions and in double beta decays are also pointed out. Results, obtained within this theoretical framework, are illustrated for the reaction 40Ca (18O, 18Ne)40Ar at 15.3 AMeV and compared to the data measured at INFN-LNS by the NUMEN Collaboration. Furthermore, preliminary results for reactions involving heavier systems, such as 76Se (18O, 18Ne)76Ge, are shown.

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O18+Se76 elastic and inelastic scattering at 275 MeV

Cited by 19 publications

References 60 publications

Analysis of one-neutron transfer reaction in $^{18}$O + $^{76}$Se collision at 275 MeV

Analysis of one-neutron transfer reaction in $^{18}$O + $^{76}$Se collision at 275 MeV

Multichannel experimental and theoretical constraints for the Cd116(Ne20,F20
Burrello¹,
Calabrese²,
Cappuzzello³
et al. 2022
Phys. Rev. C
Self Cite
26
0
2
0
View full text Add to dashboard Cite

Modeling Double Charge Exchange processes occurring in Heavy Ion Reactions

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O18+Se76 elastic and inelastic scattering at 275 MeV

Cited by 19 publications

References 60 publications

Analysis of one-neutron transfer reaction in $^{18}$O + $^{76}$Se collision at 275 MeV

Analysis of one-neutron transfer reaction in $^{18}$O + $^{76}$Se collision at 275 MeV

Multichannel experimental and theoretical constraints for the Cd116(Ne20,F20Burrello1, Calabrese2, Cappuzzello3 et al. 2022Phys. Rev. CSelf Cite26020View full textAdd to dashboardCite

Modeling Double Charge Exchange processes occurring in Heavy Ion Reactions

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About

Multichannel experimental and theoretical constraints for the Cd116(Ne20,F20
Burrello¹,
Calabrese²,
Cappuzzello³
et al. 2022
Phys. Rev. C
Self Cite
26
0
2
0
View full text Add to dashboard Cite