Precision determination of Q -values relevant to superallowed nuclear β-decay

Vonach, H.; Glässel, P.; Huenges, E.; Maier-Komor, P.; Rösler, H.; Scheerer, H.J.; Paul, H.; Semrad, D.

doi:10.1016/0375-9474(77)90234-2

Precision determination of Q -values relevant to superallowed nuclear β-decay

1977

15 pages

Published in:

Nucl.Phys.A 278 (1977) 189-203

Published: 1977

DOI:

10.1016/0375-9474(77)90234-2

View in:

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Abstract: (Elsevier)

Using the precision time-of-flight measuring system and the Q3D spectrograph of the Munich Tandem Laboratory, Q -value for the ( 3 He, t) reaction on 26 Mg, 34 S, 42 Ca, 46 Ti, 50 Cr and 54 Fe were measured with an accuracy of 0.4–0.6 keV (eff. standard deviation). In agreement with recent measurements at Chalk River considerable deviations from the 1971 mass table values (up to 8 keV) were found. Decay energies for the corresponding superallowed β-decays were derived from the Q -value, and improved ¢Ft values were calculated from weighted averages of the decay energies and half-lives reported in the literature, including the present results. The results are compatible with a constant value ¢Ft = 3087.9 ± 3.8 sec for all decays.

Nuclear reactions

References(28)

Figures(0)

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Precision determination of Q -values relevant to superallowed nuclear β-decay

Citations per year

Superallowed 0 + → 0 + nuclear β-decays

KFK 1840

Least squares adjustment of the coupling constants in nuclear beta-decay

Superallowed 0+ --> 0+ Nuclear beta Decays and Cabibbo Universality

Superallowed 0 + → 0 + and isospin-forbidden J π → J π fermi transitions

Fermi Beta Decay, A>40: The Masses of Sc-42, V-46, Mn-50, and Co-54

Thesis

Corrections to the ft -values of 0 + → 0 + superallowed β -transitions and effective constant G v ′ of nuclear β -decay

Corrections to the ftftft-values of 0+→0+0^+ → 0^+0+→0+ superallowed β-decays

Isospin in nuclear physics

Corrections to the $ft$ -values of $0^+ → 0^+$ superallowed β-decays