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C W Dejager - One of the best experts on this subject based on the ideXlab platform.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ({open_quotes}project{close_quotes}) here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis. 51 refs., 11 figs, 1 tab.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ("projected") here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis.
Peter Moller - One of the best experts on this subject based on the ideXlab platform.
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Nuclear Ground State masses and deformations frdm 2012
Atomic Data and Nuclear Data Tables, 2016Co-Authors: Peter Moller, Takatoshi Ichikawa, Arnold J Sierk, H SagawaAbstract:Abstract We tabulate the atomic mass excesses and binding energies, Ground-State shell-plus-pairing corrections, Ground-State microscopic corrections, and Nuclear Ground-State deformations of 9318 nuclei ranging from 16O to A = 339 . The calculations are based on the finite-range droplet macroscopic and the folded-Yukawa single-particle microscopic Nuclear-structure models, which are completely specified. Relative to our FRDM(1992) mass table in Moller et al. (1995), the results are obtained in the same model, but with considerably improved treatment of deformation and fewer of the approximations that were necessary earlier, due to limitations in computer power. The more accurate execution of the model and the more extensive and more accurate experimental mass data base now available allow us to determine one additional macroscopic-model parameter, the density-symmetry coefficient L , which was not varied in the previous calculation, but set to zero. Because we now realize that the FRDM is inaccurate for some highly deformed shapes occurring in fission, because some effects are derived in terms of perturbations around a sphere, we only adjust its macroscopic parameters to Ground-State masses. The values of ten constants are determined directly from an optimization to fit Ground-State masses of 2149 nuclei ranging from 16O to 106 265 Sg and 108 264 Hs. The error of the mass model is 0.5595 MeV for the entire region of nuclei included in the adjustment, but is only 0.3549 MeV for the region N ≥ 65 . We also provide masses in the FRLDM, which in the more accurate treatments now has an error of 0.6618 MeV, with 0.5181 MeV for nuclei with N ≥ 65 , both somewhat larger than in the FRDM. But in contrast to the FRDM, it is suitable for studies of fission and has been extensively so applied elsewhere, with FRLDM(2002) constants. The FRLDM(2012) fits 31 fission-barrier heights from 70Se to 252Cf with a root-mean-square deviation of 1.052 MeV.
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Nuclear Ground State masses and deformations frdm 2012
arXiv: Nuclear Theory, 2015Co-Authors: Peter Moller, Takatoshi Ichikawa, Arnold J Sierk, H SagawaAbstract:We tabulate the atomic mass excesses and binding energies, Ground-State shell-plus-pairing corrections, Ground-State microscopic corrections, and Nuclear Ground-State deformations of 9318 nuclei ranging from $^{16}$O to $A=339$. The calculations are based on the finite-range droplet macroscopic model and the folded-Yukawa single-particle microscopic model. Relative to our FRDM(1992) mass table in {\sc Atomic Data and Nuclear Data Tables} [{\bf 59} 185 (1995)], the results are obtained in the same model, but with considerably improved treatment of deformation and fewer of the approximations that were necessary earlier, due to limitations in computer power. The more accurate execution of the model and the more extensive and more accurate experimental mass data base now available allows us to determine one additional macroscopic-model parameter, the density-symmetry coefficient $L$, which was not varied in the previous calculation, but set to zero. Because we now realize that the FRDM is inaccurate for some highly deformed shapes occurring in fission, because some effects are derived in terms of perturbations around a sphere, we only adjust its macroscopic parameters to Ground-State masses. The values of ten constants are determined directly from an optimization to fit Ground-State masses of 2149 nuclei ranging from $^{16}$O to $^{265}_{106}$Sg and $^{264}_{108}$Hs. The error of the mass model is 0.5595~MeV. We also provide masses in the FRLDM, which in the more accurate treatments now has an error of 0.6618 MeV. But in contrast to the FRDM, it is suitable for studies of fission and has been extensively so applied elsewhere, with FRLDM(2002) constants. The FRLDM(2012) fits 31 fission barrier heights from $^{70}$Se to $^{252}$Cf with a root-mean-square deviation of 1.052 MeV.
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axial and reflection asymmetry of the Nuclear Ground State
Atomic Data and Nuclear Data Tables, 2008Co-Authors: Peter Moller, R Bengtsson, B G Carlsson, Peter Olivius, Takatoshi Ichikawa, H Sagawa, Akira IwamotoAbstract:More than a decade ago we published a calculation of Nuclear Ground-State masses and deformations in Atomic Data and Nuclear Data Tables [P. Moller, J.R. Nix, W.D. Myers, W.J. Swiatecki, At. Data Nucl. Data Tables 59 (1995) 185]. In this study, triaxial Nuclear shapes were not considered. We have now enhanced our model and studied the influence of triaxial shape degrees of freedom on the Nuclear Ground-State potential-energy (mass) and Ground-State shape. It turns out that a few hundred nuclei are affected to a varying degree with the largest effect, about 0.7 MeV, occurring near Ru-108. We provide here a table of the calculated effects of triaxial shape degrees of freedom. Although axial-asymmetry effects were not considered in the 1995 mass calculation, it did study the effects of reflection-asymmetric shape degrees of freedom (epsilon(3)) on Nuclear masses. However, the magnitude of the effect was not tabulated. Here, we provide such a table. In addition we calculate the effect in a much improved fashion: we search a four-dimensional deformation space (epsilon(2), epsilon(3), epsilon(4), and epsilon(6)). This is now possible because the computational resources available to us today are more than 100,000 times better than at the time we calculated the mass table published in 1995. (C) 2008 Elsevier Inc. All rights reserved. (Less)
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particle number projection in the macroscopic microscopic approach
Nuclear Physics, 2007Co-Authors: H Olofsson, R Bengtsson, Peter MollerAbstract:We perform Nuclear Ground-State pairing calculations with the monopole pairing interaction. The particle number fluctuations are taken into account by the particle number projection method, with variation after projection. The pairing-correction energies obtained in this approach are compared to the BCS-model results. We discuss extensively how to properly incorporate different pairing models in global macroscopic-microscopic Nuclear mass calculations. A method to calculate the smoothly changing part of the particle number projected energy is developed based on the Strutinsky procedure, making it possible to extract a pairing-shell energy. The behavior of the different pairing models is investigated in detail in the nuclei Er-164 and Tm-165. Calculations are then performed along the beta-stability line and for several isotope and isotone chains from the proton drip-line to the neutron drip-line. The single-particle energy levels used are obtained from two different single-particle potentials: the folded-Yukawa and the modified-harmonic oscillator potentials. The pairing calculations in the two potentials differ slightly in the fine-structure but the overall results are very similar. When comparing the particle number projected model and the BCS model it is found that the pairing-shell energy is quite insensitive to which microscopic pairing model is used. (c) 2006 Elsevier B.V. All rights reserved. (Less)
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Nuclear properties for astrophysical and radioactive ion beam applications
Atomic Data and Nuclear Data Tables, 1997Co-Authors: Peter Moller, J R Nix, K L KratzAbstract:Abstract We tabulate the Ground-State odd-proton and odd-neutron spins and parities, proton and neutron pairing gaps, one- and two-neutron separation energies, quantities related to β -delayed one- and two-neutron emission probabilities, average energy and average number of emitted neutrons, β -decay energy release and half-life with respect to Gamow–Teller decay with a phenomenological treatment of first-forbidden decays, one- and two-proton separation energies, and α -decay energy release and half-life for 9318 nuclei ranging from 16O to 339136 and extending from the proton drip line to the neutron drip line. This paper is a new and improved version of Atomic Data And Nuclear Data Tables [66 131 (1997)]. The starting point of our present work is the new study (FRDM(2012)) of Nuclear Ground-State masses and deformations based on the finite-range droplet model and folded-Yukawa single-particle potential published in a previous issue of Atomic Data And Nuclear Data Tables [109–110, 1 (2016)]. The β -delayed neutron-emission probabilities and Gamow–Teller β -decay rates are obtained from a quasi-particle random-phase approximation with single-particle levels and wave functions at the calculated Nuclear Ground-State shapes as input quantities. A development since 1997 is we now use a Hauser–Feshbach approach to account for (n, γ ) competition and treat first-forbidden decay in a phenomenological approach.
G Fricke - One of the best experts on this subject based on the ideXlab platform.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ({open_quotes}project{close_quotes}) here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis. 51 refs., 11 figs, 1 tab.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ("projected") here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis.
L A Schaller - One of the best experts on this subject based on the ideXlab platform.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ({open_quotes}project{close_quotes}) here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis. 51 refs., 11 figs, 1 tab.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ("projected") here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis.
C. Bernhardt - One of the best experts on this subject based on the ideXlab platform.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ({open_quotes}project{close_quotes}) here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis. 51 refs., 11 figs, 1 tab.
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Nuclear Ground State charge radii from electromagnetic interactions
Atomic Data and Nuclear Data Tables, 1995Co-Authors: G Fricke, K Heilig, L A Schaller, LUTZ SCHELLENBERG, E B Shera, C. Bernhardt, C W DejagerAbstract:The Tables summarize experimental results from muonic atom transition energies, Nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on Nuclear Ground-State charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed ("projected") here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis.
