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Your search keyword '"Drake, G.W.F."' showing total 3 results
Start Over Author "Drake, G.W.F." Publisher hal ccsd
3 results on '"Drake, G.W.F."'

1. First Penning-trap mass measurement in the millisecond half-life range: The exotic halo nucleus Li-11

Author

Smith, M., Brodeur, M., Brunner, T., Ettenauer, S., Lapierre, A, Ringle, R., Ryjkov, V.L., Ames, F., Bricault, P., Drake, G.W.F., Delheij, P., Lunney, D., Dilling, J., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, ISOTOPES, Physics::Atomic Physics, ELECTRON, ION, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, HIGH-PRECISION
Abstract

Perched precariously on the brink of nuclear stability, 11Li has the lowest two-neutron binding energy of all nuclei. This gives rise to the exotic phenomena of a nuclear halo that has a wavefunction extending beyond the range normally allowed for by the strong interaction. The most accurate mass measurements are achieved using Penning traps. In this letter, we report a new mass for 11Li using the TITAN trapping experiment at TRIUMF's ISAC facility where 'designer atomic nuclei' can be produced and studied in detail. This is by far the shortest-lived nuclide, t1/2 = 8.8 ms, for which a mass measurement has ever been performed with a Penning trap. We derive a new two-neutron separation energy of 369.15(65) keV: seven times more precise than the best previous value. We also report results from state-of-the-art atomic-physics calculations using the new mass and extract a new charge radius for 11Li from recent isotope shift measurements

Published
2008
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2. Nuclear charge radius of $^8$He

Author

Mueller, P., Sulai, I.A., Villari, A.C.C., Alcantara-Nunez, J.A., Alves Condé , R., Bailey, K., Drake, G.W.F., Dubois, M., Eléon, C., Gaubert, G., Holt, R. J., Janssens, R. V. F., Lecesne, N., Lu, Z.T., O'Connor, T.P., Saint-Laurent, M.G., Thomas, J.C., Wang, L.B., Physics Division, Argonne National Laboratory, Argonne National Laboratory [Lemont] (ANL), Department of Physics and Enrico Fermi Institute, University of Chicago, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Physics Department, University of Windsor [Ca], Los Alamos National Laboratory (LANL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
FOS: Physical sciences, Physics::Atomic Physics, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Expérience GANIL; International audience; The root-mean-square (rms) nuclear charge radius of ^8He, the most neutron-rich of all particle-stable nuclei, has been determined for the first time to be 1.93(3) fm. In addition, the rms charge radius of ^6He was measured to be 2.068(11) fm, in excellent agreement with a previous result. The significant reduction in charge radius from ^6He to ^8He is an indication of the change in the correlations of the excess neutrons and is consistent with the ^8He neutron halo structure. The experiment was based on laser spectroscopy of individual helium atoms cooled and confined in a magneto-optical trap. Charge radii were extracted from the measured isotope shifts with the help of precision atomic theory calculations.

Published
2007
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3. Nonreactive Scattering

Author

Alexandre Faure, Francois Lique, David R. Flower, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Durham University, and Drake, G.W.F.

Subjects
[PHYS]Physics [physics], quasi-classical and semi-classical scattering, centrifugal potential, relative collision, classical trajectory, Wigner coefficient, Molecular physics, Coriolis coupling, Feshbach resonances
Abstract

International audience; The basic formulations of nonreactive scattering are presented in the sections to follow. The quantal approach to this problem is outlined. Specific symmetries, and their closely related conservation laws, which reduce the complexity of computation, are discussed, along with the usual coordinate systems used to express the necessary scattering equations. The derivation of the matrix elements needed for a given calculation is provided in the case of a diatom-diatom collision. Semiclassical and quasi-classical methods are also briefly introduced. The chapter ends with a comparison between theory and experiment for the benchmark CO–H2 system and an outline of future directions in the field. © 2023, Springer Nature Switzerland AG.

Published
2023
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