Crossing the Dripline to 11N Using Elastic Resonance Scattering

The level structure of the unbound nucleus 11N has been studied by 10C+p elastic resonance scattering in inverse geometry with the LISE3 spectrometer at GANIL, using a 10C beam with an energy of 9.0 MeV/u. An additional measurement was done at the A1200 spectrometer at MSU. The excitation function above the 10C+p threshold has been determined up to 5 MeV. A potential-model analysis revealed three resonance states at energies 1.27 (+0.18-0.05) MeV (Gamma=1.44 +-0.2 MeV), 2.01(+0.15-0.05) MeV, (Gamma=0.84 +-$0.2 MeV) and 3.75(+-0.05) MeV, (Gamma=0.60 +-0.05 MeV) with the spin-parity assignments I(pi) =1/2+, 1/2- and 5/2+, respectively. Hence, 11N is shown to have a ground state parity inversion completely analogous to its mirror partner, 11Be. A narrow resonance in the excitation function at 4.33 (+-0.05) MeV was also observed and assigned spin-parity 3/2-.Comment: 14 pages, 9 figures, twocolumn Accepted for publication in PR

Charged-Particle Thermonuclear Reaction Rates: III. Nuclear Physics Input

The nuclear physics input used to compute the Monte Carlo reaction rates and probability density functions that are tabulated in the second paper of this series (Paper II) is presented. Specifically, we publish the input files to the Monte Carlo reaction rate code RatesMC, which is based on the formalism presented in the first paper of this series (Paper I). This data base contains overwhelmingly experimental nuclear physics information. The survey of literature for this review was concluded in November 2009.Comment: 132 page

Nuclear astrophysics experiments: Reactions and elastic scattering

Experimental methods in nuclear astrophysics experiments with radioactive beams are described, and evaluated. The importance of performing the (p, p) elastic scattering in parallel to a (p, $\alpha$) or a (p, $\gamma$) reaction is emphasized

Degradation and recovery of Ge detectors: tests prior to a space mission

Ge detectors onboard the future INTEGRAL mission of ESA will be deteriorated by secondary neutrons. In the present work, flight model Ge detectors were degraded by accelerator-produced neutrons, and then annealed. The detector recovery was found very sensitive to the annealing temperature. Transients following a high-voltage cut-off were studied as well. (C) 2002 Elsevier Science B.V. All rights reserved

Measurement of the Pb-208(n,p) Tl-208 reaction cross section between 30 and 70 MeV neutron energy

The Pb-208(n,p)(208)T1 reaction cross section has been measured between 30 and 70 MeV neutron energy by the activation method. The results are compared with the predictions of a schematic model which includes contributions from direct reactions and compound nucleus formation

Influence of temperature on the behaviour of INTEGRAL n-type HPGe detectors irradiated with fast neutrons

Several INTEGRAL n-type HPGe detectors have been irradiated by fast neutrons at different temperatures and their performances have been evaluated. Their behaviour during warm-up and cool-down cycles following the irradiations show evidence for irreversible temperature effects above 100 K. The detectors recovery after annealing was also studied. (C) 1999 Elsevier Science B.V. All rights reserved

Neutron-induced reactions contributing to the background in γ-ray astrophysics missions

Nuclear reactions induced by neutrons lead to the delayed emission of γ rays contributing to the instrumental background in γ-ray astrophysics missions in space. The cross sections for the reactions 27Al(n,2p)26Na, 27Al(n,α)24Na, and 56Fe(n,p)56Mn were measured up to a neutron energy of 50 or 65 MeV. A simple model was developed that allows one to extrapolate cross sections to higher energies. The magnitude of the instrumental background lines induced in the detectors of ESA's future INTEGRAL mission is deduced from our measurements.SCOPUS: ar.jinfo:eu-repo/semantics/publishe