This paper gives the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use. The 2010 adjustment takes into account the data considered in the 2006 adjustment as well as the data that became available from 1 January 2007, after the closing date of that adjustment, until 31 December 2010, the closing date of the new adjustment. Further, it describes in detail the adjustment of the values of the constants, including the selection of the final set of input data based on the results of least-squares analyses. The 2010 set replaces the previously recommended 2006 CODATA set and may also be found on the World Wide Web at physics.nist.gov/constants.

/pdf/codata-recommended-values-of-the-fundamental-physical-4bsdant71c.pdf

CODATA Recommended Values of the Fundamental Physical Constants: 2006

Table of experimental nuclear ground state charge radii: An update

Adopted values for the reduced electric quadrupole transition probability, B(E2)↑, from the ground state to the first-excited 2+ state of even–even nuclides are given in Table I. Values of τ, the mean life of the 2+ state; E, the energy; and β, the quadrupole deformation parameter, are also listed there. The ratio of β to the value expected from the single-particle model is presented. The intrinsic quadrupole moment, Q0, is deduced from the B(E2)↑ value. The product E×B(E2)↑ is expressed as a percentage of the energy-weighted total and isoscalar E2 sum-rule strengths.

Table II presents the data on which Table I is based, namely the experimental results for B(E2)↑ values with quoted uncertainties. Information is also given on the quantity measured and the method used. The literature has been covered to November 2000.

The adopted B(E2)↑ values are compared in Table III with the values given by systematics and by various theoretical models. Predictions of unmeasured B(E2)↑ values are also given in Table III.

Transition probability from the ground to the first-excited 2^+ state of even-even nuclides

The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries

Empirical evidence suggests that neutron pairing plays an important role for the stability of nuclei near the neutron drip line. It is shown that the low binding of these nuclei will lead to a neutronization of the nuclear surface and possibly to large cross-sections for Coulomb dissociation, which then offers a new way to study clusters and their binding energies.

http://iopscience.iop.org/article/10.1209/0295-5075/4/4/005/pdf

The Neutron Halo of Extremely Neutron-Rich Nuclei

A consistent set of nuclear rms charge radii: properties of the radius surface R(N,Z) ☆

This paper is devoted to the analysis of the general trends in the nucleon number dependence of the experimental root-mean-square (rms) charge radii. It is based on the data obtained by different methods of combined treatment of (i) radii changes determined from optical and—to a lesser extent—Kαx-ray isotope shifts, and (ii) absolute radii measured from muonic and electronic scattering experiments. These methods have recently been developed and now updated including experimental data up to the beginning of 2008. Thus, new sets of rms nuclear radii have been obtained covering 865 isotopes for 76 elements from 1 Ht o96Cm. New information on the isotopic and isotonic behaviour of the nuclear charge radius is obtained with a high accuracy compared to that of the directly measured radii values for the same element. Of special interest is that concerning the light elements and the appearance of non-traditional magic neutron and proton numbers, as N = 6, 14 and Z = 14; the doublemagic properties of 96 Zr are discussed in more detail. A quantitative criterion is introduced, which points to the peculiarities in the radii trend and offers an opportunity to investigate it more closely. The results provide important information which may serve as a guide to incorporate essential new features into the theoretical approaches. (Some figures in this article are in colour only in the electronic version)

https://iopscience.iop.org/article/10.1088/0954-3899/36/8/085102/pdf

N and Z dependence of nuclear charge radii

Empirical correlations between nuclear charge radii and several other experimental ground and excited state observables of even–even nuclei are presented for different regions in the nuclear chart. The correlation among the isotonic development of these observables around the classical magic proton numbers is considered starting from Z = 82 to lower magic Z. Special attention is paid to the structural evolution along the isotonic chains around the ‘traditional’ magic proton numbers 8 and 20. The remarkable correlations recognized there indicate shell structure changes and the appearance of new non-traditional single or double magic-like numbers, as Z = 6, 14, 16. The results add new information to the properties of light nuclei. As the mechanisms responsible for the modification of nuclear shell closures are still under discussion, the experimental information obtained is of crucial importance to better constrain the theoretical models. The effect of nuclear deformation on radii and their global correlation over the full mass number region is also investigated.

https://iopscience.iop.org/article/10.1088/0954-3899/42/5/055108/pdf

Correlations of nuclear charge radii with other nuclear observables

Nuclear root-mean-square (rms) charge radii have been compiled, selected and evaluated using two different procedures: a refined and a simple one. Running them on the same database, the results for weighted average radii are very close to each other: 91% of the differences are within " 1⁄2 of the combined error. This confirms our earlier conclusion that the results are generally more sensitive to the decision which data we include in the averaging procedure, and less sensitive to the way how the selected data are weighted to form an average. The resulting weighted averages – updated in May 1999 – are presented in Appendix IV. All background data and program files together with a complete bibliography are also included in the Appendices. In addition to the data tables, simple radius formulae are also given with updated parameters. These formulae may be useful to estimate unmeasured radii (“intelligent interpolation”) or to perform analytic calculations with the functions r(A) and r(Z,A).

/pdf/table-of-nuclear-root-mean-square-charge-radii-4ztqhzvfic.pdf

I. Angeli

Papers

Table of experimental nuclear ground state charge radii: An update

A consistent set of nuclear rms charge radii: properties of the radius surface R(N,Z) ☆

N and Z dependence of nuclear charge radii

Correlations of nuclear charge radii with other nuclear observables

Table of nuclear root mean square charge radii