Mixed Fermi and Gamow-Teller β-transitions and isoscalar magnetic moments - INSPIRE

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Mixed Fermi and Gamow-Teller β-transitions and isoscalar magnetic moments

1978

54 pages

Published in:

Atom.Data Nucl.Data Tabl. 21 (1978) 567-620,
Atom.Data Nucl.Data Tabl. 22 (1978) 369-369 (erratum)

Published: 1978

DOI:

10.1016/0092-640X(78)90008-6,
10.1016/0092-640X(78)90033-5 (erratum)

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Abstract: (Elsevier)

Experimental data on Q -values, β end-point energies, half-lives, and branching ratios pertaining to superallowed J π → J π ( J ≠ 0) β-transitions are compiled and evaluated. For 39 cases where data are complete, the Fermi fractions are subtracted (under the assumption that the conserved vector current hypothesis is valid) and the derived Gamow-Teller matrix elements, 〈 σ 3 τ 3 〉, relative to 〈 σ 3 τ 3 〉 = 1.0 for the neutron decay, are tabulated and compared with shell-model estimates. Magnetic moments for the relevant nuclei are also compiled. Isoscalar magnetic moments are determined for 19 isobaric mirror pairs. After correction for isoscalar meson-exchange currents, the matrix elements 〈 σ 3 〉 are deduced and compared with shell-model estimates. With the further assumption that the shell-model predictions for the matrix elements 〈 σ 3 (1 ± τ 3 )〉 may be relied upon, estimates of the renormalization of the effective axial-vector coupling in nuclei are deduced and presented in Table C. The table shows good qualitative agreement between the deduced and theoretical values. The literature survey ended in November 1977.

References(44)

Figures(0)

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