Simultaneous Determination of Neutron-Induced Fission and Radiative Capture Cross Sections from Decay Probabilities Obtained with a Surrogate Reaction

Sánchez, R. Pérez; Jurado, B.; Méot, V.; Roig, O.; Dupuis, Marc; Bouland, O.; Denis-Petit, D.; Marini, P.; Mathieu, L.; Tsekhanovich, I.; Aïche, M.; Audouin, L.; Cannes, Céline; Czájkowski, S.; Delpech, Sylvie; Görgen, A.; Guttormsen, M.; Henriques, A.; Kessedjian, G.; Nishio, K.; Ramos, D.; Siem, S.; Zeiser, F.

doi:10.1103/physrevlett.125.122502

Cited by 18 publications

(29 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experiment was performed at GSI, Darmstadt in Germany, where the isotopes 29,30 Na and 33 Mg and 35 Al were produced by fragmentation of a 40 Ar beam with an energy of 540A MeV using the FRS-ALADIN-LAND setup. The fragments were separated by the fragment separator (FRS) [37] and the secondary beams were transported to the experimental site for complete kinematic measurements using 208 Pb, 12 C, and empty secondary targets.…”

Section: Methodsmentioning

confidence: 99%

“…In the simulation, the decay scheme of various excited states of 28,29 Na, 34 Al, 32 Mg [42,48,49] were considered according to the reported values [55]. The partial exclusive Coulomb breakup cross sections of 29,30 Na, 35 Al, 33 Mg for populating various excited states of 28,29 Na, 34 Al, 32 Mg, respectively, have been extracted from the invariant mass spectra in coincidence with the sum energy of γ rays with the different energy ranges. The detection efficiencies and feeding corrections from higher states of γ rays have been obtained from detailed simulations.…”

Section: Methodsmentioning

confidence: 99%

“…These indirect measurements are Coulomb dissociation (CD) [18][19][20], the ANC method (asymptomatic normalization coefficient) [21,22] and the Trojan-horse method [23,24]. Another popular indirect measurement technique is the surrogate method [25][26][27][28][29][30]. In this case, a different "surrogate" reaction is considered in which the same compound nucleus as of the desired reaction is formed and its decay products are observed in order to extract the neutron capture cross section.…”

Section: Introductionmentioning

confidence: 99%

“…Until recently, (n, γ ) capture cross sections measured using this method have been reported only for lower sd-shell neutron-rich nuclei [32,33]. In this work, we shall report the measurements of the neutron capture cross sections for the upper sd and p f shell neutron-rich nuclei, 28 Na(n, γ ) 29 Na, 29 Na(n, γ ) 30 Na, 32 Mg(n, γ ) 33 Mg, and 34 Al(n, γ ) 35 Al that were considered as seed nuclei in the neutrino-driven wind model. We utilized the indirect CD method to study the time-reversed reactions 29 Na(γ , n) 28 Na, 30 Na(γ , n) 29 Na, and 33 Mg(γ , n) 32 Mg in inverse kinematics.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we shall report the measurements of the neutron capture cross sections for the upper sd and p f shell neutron-rich nuclei, 28 Na(n, γ ) 29 Na, 29 Na(n, γ ) 30 Na, 32 Mg(n, γ ) 33 Mg, and 34 Al(n, γ ) 35 Al that were considered as seed nuclei in the neutrino-driven wind model. We utilized the indirect CD method to study the time-reversed reactions 29 Na(γ , n) 28 Na, 30 Na(γ , n) 29 Na, and 33 Mg(γ , n) 32 Mg in inverse kinematics. The CD cross sections were measured through kinematically complete measurements using a 208 Pb target and the FRS-LAND setup at GSI, Darmstadt, Germany.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Neutron capture cross sections of light neutron-rich nuclei relevant for r -process nucleosynthesis

Bhattacharyya¹,

Pramanik²,

Rahaman³

et al. 2021

Phys. Rev. C

View full text Add to dashboard Cite

The measurements of neutron capture cross sections of neutron-rich nuclei are challenging but essential for understanding nucleosynthesis and stellar evolution processes in the explosive burning scenario. In the quest of r-process abundances, according to the neutrino-driven-wind model, light neutron-rich unstable nuclei may play a significant role as seed nuclei that influence the abundance pattern. Hence, experimental data for neutron capture cross sections of neutron-rich nuclei are needed. Coulomb dissociation of radioactive ion beams at intermediate energy is a powerful indirect method for inferring capture cross section. As a test case for validation of the indirect method, the neutron capture cross section (n, γ ) for 14 C was inferred from the Coulomb dissociation of 15 C at intermediate energy (600A MeV). A comparison between different theoretical approaches and experimental results for the reaction is discussed. We report for the first time experimental reaction cross sections of 28 Na(n, γ ) 29 Na, 29 Na(n, γ ) 30 Na, 32 Mg(n, γ ) 33 Mg, and 34 Al(n, γ ) 35 Al. The reaction cross sections were inferred indirectly through Coulomb dissociation of 29,30 Na, 33 Mg, and 35 Al at incident projectile energies around 400-430 A MeV using the FRS-LAND setup at GSI, Darmstadt. The neutron capture cross sections were obtained from the photoabsorption cross sections with the aid of the detailed balance theorem. The reaction rates for the neutron-rich Na, Mg, Al nuclei at typical r-process temperatures were obtained from the measured (n, γ ) capture cross sections. The measured neutron capture reaction rates of the neutron-rich nuclei, 28 Na, 29 Na, and 34 Al are significantly lower than those predicted by the Hauser-Feshbach decay model. A similar trend was observed earlier for 17 C and 19 N but in the case of 14 C(n, γ ) 15 C the trend is opposite. The situation is more complicated when the ground state has a multi-particle-hole configuration. For 32 Mg, the measured cross section is about 40-90 % higher than the Hauser-Feshbach prediction.

show abstract