Nuclear charge- and magnetization-density-distribution parameters from elastic electron scattering

Jager, C. W. de; Vries, H. de; Vries, C. de

doi:10.1016/s0092-640x(74)80002-1

Cited by 1,388 publications

(433 citation statements)

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“…In this figure, the charge density of 208 Pb, tabulated in a number of compilations, is compared with the most recent one by Fricke et al [45]. Neglecting the oldest tabulation, differences of up to 50% are observed between Fricke et al, Jager et al [46], and de Vries et al [47] for radial distances close to 10 fm. We consequently use the Fricke charge distribution in this work.…”

Section: B Charge and Proton Distributionsmentioning

confidence: 87%

“…If the charge distribution from Ref. [46] is used instead of that from Ref. [45], r np = 0.12 fm is obtained.…”

Section: Discussionmentioning

confidence: 99%

“…[11] generates two solutions: r np = 0.16(3) fm for the electron scattering charge [46], and r np = 0.22(3) fm for the muonic charge density [45]. These solutions favor halo-type neutron densities, and both are characterized by large χ 2 values due to the poorly reproduced level shift.…”

Section: A Constraint Finite Nn Range Potentialmentioning

confidence: 99%

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Neutron density distributions from antiprotonicPb208andBi209

Kłos¹,

et al. 2007

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The x-ray cascade from antiprotonic atoms was studied for 208 Pb and 209 Bi. Widths and shifts of the levels due to the strong interaction were determined. Using modern antiproton-nucleus optical potentials, the neutron densities in the nuclear periphery were deduced. Assuming two-parameter Fermi distributions (2pF) describing the proton and neutron densities, the neutron rms radii were deduced for both nuclei. The difference of neutron and proton rms radii r np equal to 0.16 ± (0.02) stat ± (0.04) syst fm for 208 Pb and 0.14 ± (0.04) stat ± (0.04) syst fm for 209 Bi were determined, and the assigned systematic errors are discussed. The r np values and the deduced shapes of the neutron distributions are compared with mean field model calculations.

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Section: B Charge and Proton Distributionsmentioning

confidence: 87%

“…If the charge distribution from Ref. [46] is used instead of that from Ref. [45], r np = 0.12 fm is obtained.…”

Section: Discussionmentioning

confidence: 99%

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Neutron density distributions from antiprotonicPb208andBi209

Kłos¹,

et al. 2007

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“…The total transition energy deviates from the value reported in [7] because instead of using the Bethe logarithm reported in table I in [7] for calculating the transition frequency, an obsolete value from [10] has been used erroneously. The nuclear size contribution E FS has been calculated using a 7 Li charge radius of 2.39(3) fm [21,22] determined by elastic electron-scattering. According to [10], the field shift can be calculated from…”

Section: Introductionmentioning

confidence: 99%

Absolute frequency measurements on the 2S→3S transition of lithium-6,7

Sánchez¹,

Žáková²,

Andjelkovic³

et al. 2009

New J. Phys.

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Abstract. The frequencies of the 2S-3S two-photon transition for the stable lithium isotopes were measured by cavity-enhanced Doppler-free laser excitation that was controlled by a femtosecond frequency comb. The resulting values of 815 618 181.57(18) and 815 606 727.59(18) MHz, respectively, for 7 Li and 6 Li are in agreement with previous measurements but are more accurate by an order of magnitude. There is still a discrepancy of about 11.6 and 10.6 MHz from the latest theoretical values. This is comparable to the uncertainty in the theoretical calculations, while uncertainty in our experimental values is more than a hundred-fold smaller. More accurate theoretical calculation of the transition frequencies would allow extraction of the absolute charge radii for these stable isotopes, which in turn could improve nuclear charge radii values for the unstable lithium isotopes.

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“…[7], deconvoluted with the same proton form factor by the Fourier transform method. The same method has been used to extract the proton-point ground-state density from the charge density written as a parabolic Fermi distribution of the form with ro = 3.7984 fm, a = 0.5795 fm, and w = -0.1779 for 4oCa [7] and rq = 2.608 frn, a = 0.513 fm, and cu = -0.051 for~s O [8]. Then, assuming that the ground state and the transition densities of the neutron part is the same as that of the protons, we can calculate the form factor.…”

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confidence: 99%

Reply to ‘‘Comment on ‘Dynamical polarization potential due to the excitation of collective states’ ’’

1993

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This is a reply to the preceding Comment. We conGrm the results of our paper. The differences between our calculations and those of the preceding Comment come mainly from the form factors.Our random-phase-approximation -based form factors are in good agreement with those obtained by using experimental transition densities. PACS number(s): 25.70. Gh, 25.70.Bc In a recent paper [1] we calculated the heavy ion polarization potential due to the excitation of vibrational collective states which we describe in a microscopic way by using the random phase approximation (RPA). The result of the check is that the imaginary part of the polarization potential calculated by our code coincides with the one calculated by the analytic formula, Eq. (16)

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Nuclear charge- and magnetization-density-distribution parameters from elastic electron scattering

Cited by 1,388 publications

References 163 publications

Neutron density distributions from antiprotonicPb208andBi209

Neutron density distributions from antiprotonicPb208andBi209

Absolute frequency measurements on the 2S→3S transition of lithium-6,7

Reply to ‘‘Comment on ‘Dynamical polarization potential due to the excitation of collective states’ ’’

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