Reaction of the halo nucleus be on heavy targets at energies around the coulomb barrier

Presented at the XXXIII Mazurian Lakes Conference on Physics, Piaski, Poland, September 1–7, 2013.-- et al.New data for the reaction 11Be on 197Au at E lab = 31:9 MeV are presented. The angular distributions of the inelastically scattered 11Be and the 10Be fragments coming from the 11Be dissociation have been extracted and compared with semiclassical and coupled-channels calculations in an angular range θlab = 13deg;-46deg; for the detected Be fragment.This work was supported by the Spanish Government under the projects FPA2009-07387, FPA2009-07653, FPA2009-08848, FPA2012-32443 and Consolider CPAN CSD2007-00042; the Helmholtz Association (HGT) through the Nuclear Astrophysics Virtual Institute (VH-VI-417); ATI Sistemas; a Natural Sciences and Engineering Research Council of Canada grant. TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada.Peer Reviewe

Scattering of light halo nuclei on heavy target at energies around the Coulomb barrier

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0.-- et al. and the E1104 S1202 collaborations at TRIUMF.-- Trabajo presentado a la: "25th International Nuclear Physics Conference" (INPC), celebrada en Firenze (Italia) del 2 al 7 de junio de 2013.We report here on experiments performed at TRIUMF to study the scattering of the light halo nuclei 11Li on lead at energies below and around the Coulomb barrier. The the elastic and break-up differential cross section are interpreted in the framework of Continuum-Discretized Coupled-Channel calculations. The departure from Rutherford scattering at energies below the barrier is well beyond the behavior of normal nuclei.This work was supported by the Spanish CICYT under the project numbers FPA2009-07387, FPA2012-32443, FPA2009-08848, FPA2009-07653, and FPA2010-22131-C02-01 and by the Consolider Ingenio 2010 Program CPAN (CSD2007- 00042).Peer Reviewe

Li-11 structural information from inclusive break-up measurements

IWM-EC 2014 – International Workshop on Multi facets of EoS and Clustering.-- et al.Structure information of 11Li halo nucleus has been obtained from the inclusive break-up measurements of the 11Li+208Pb reactions at energies around the Coulomb barrier (Elab = 24.3 and 29.8 MeV). The effective break-up energy and the slope of B(E1) distribution close to the threshold have been extracted from the experimental data.Peer Reviewe

Positron-neutrino correlation in the 0^+ \to 0^+ decay of ^{32}Ar

The positron-neutrino correlation in the $0^+ \to 0^+ \beta$ decay of $^{32}$Ar was measured at ISOLDE by analyzing the effect of lepton recoil on the shape of the narrow proton group following the superallowed decay. Our result is consistent with the Standard Model prediction. For vanishing Fierz interference we find $a=0.9989 \pm 0.0052 \pm 0.0036$, which yields improved constraints on scalar weak interactions

Precise measurement of near-barrier He 8 + Pb 208 elastic scattering: Comparison with He 6

et al.Dramatic differences in the elastic scattering of the neutron rich nuclei He6 and He8 are found when new high quality data for the He8+Pb208 system are compared with previously published He6+Pb208 data at the same laboratory frame incident energy. The new He8 data are of the same level of detail as for stable beams. When comparing them with those previously obtained for He6+Pb208 at the same energy, it is possible to determine from the data alone that He6 has a much longer range absorption than He8. However, both nuclei show significant absorption beyond their strong absorption radii. While it has been known for a long time that elastic scattering at energies around the barrier only determines the optical potential over a small distance in radial space, typically ±0.5 fm or so, both the He6 and the He8 imaginary potentials obtained from various optical model fits to these data are the same over a much wider range of ±1.5 fm. ©2016 American Physical SocietyThis work was supported in part by Grant No. FPA2010-22131- C02-01 (FINURA) and Grant No. FPA2013-47327-C2-1-R from the Spanish Ministry of Economy and Competitiveness, UNAM-PAPIIT IA101616 (Mexico), Grant No. N202 033637 from the Ministry of Science and Higher Education of Poland, and Contract No. EUI2009-04163 (EUROGENESIS) from the European Science Foundation.Peer Reviewe

Scattering of the halo nucleus 11Li and its core 9Li on 208Pb at energies around the Coulomb barrier

The first measurement of the elastic scattering of the halo nucleus 11Li and its core 9Li on 208Pb at energies around the Coulomb barrier is presented. The 11Li reaction showed a large cross section for the breakup channel, even at energies well below the barrier. The analysis of the 11Li + 208Pb scattering data in terms of the continuum-discretized coupled-channel calculations indicates that the effect of the coupling to the breakup channels produces a strong suppression of the elastic cross section at energies above and below the barrier. This effect is mainly due to the strong Coulomb coupling to the dipole states in the low-lying continuum of 11Li