A parametrization of the phase space factor for allowed β-decay

Wilkinson, D.H.; Macefield, B.E.F.

doi:10.1016/0375-9474(74)90645-9

Cited by 167 publications

(77 citation statements)

References 26 publications

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“…The benchmark experimental f t-value that has been used by theorists [4,[13][14][15] up until now dates back to Ref. [58] and a statistical rate function obtained from the tabulated values of Wilkinson and Macefield [59]. By happenstance our half-life measurement agrees with the value adopted in [36] so no shifts due to a revision in the half life are included in Table VII.…”

Section: Comparison With Theorymentioning

confidence: 76%

Precision measurement of the6He half-life and the weak axial current in nuclei

et al. 2012

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Background: The beta decays of 3 H and 6 He can play an important role in testing nuclear wave-function calculations and fixing low-energy constants in effective-field theory approaches. However, there exists a large discrepancy between previous measurements of the 6 He half-life.Purpose: Our measurement aims at resolving this long-standing discrepancy in the 6 He half-life and providing a reliable f t-value and Gamow-Teller matrix element for comparison with theoretical ab-initio calculations.Method: We measured the 6 He half-life by counting the beta-decay electrons with two scintillator detectors operating in coincidence.Results: The measured 6 He half-life is 806.89 ± 0.11stat +0.23 −0.19 syst ms corresponding to a relative precision of 3 × 10 −4 . Calculating the statistical rate function we determined the f t-value to be 803.04 +0.26 −0.23 s. Conclusions: Our result resolves the previous discrepancy by providing a higher-precision result with careful analysis of potential systematic uncertainties. The result provides a reliable basis for future precision comparisons with ab-inito calculations.

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Section: Comparison With Theorymentioning

confidence: 76%

Precision measurement of the6He half-life and the weak axial current in nuclei

et al. 2012

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“…neglected in most cases A An analytical parametrization of the Fermi function and of the integrated Fermi function (for a point like nucleus), of the screening corrections, the finite nuclear size effects, and of the dependence -of allowed P decay on the nuclear radius has been derited by Wilkinson (1970bWilkinson ( , 1970C, 1970d197Oe, 1972b19730*Wilkinson andMacefield, 1974 in PN (l,m,n,p) and form-factor coefficients of rank two, we find 121 (Appendix A2.1; Behrens and Buhring, 1971)13…”

mentioning

confidence: 99%

Orbital electron capture by the nucleus

Bambynek¹,

et al. 1977

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“…The resulting log(f t)-values are presented in Table 6. The log(f t)-values are calculated according to the parametrization of [23] with Q β + = 12.076(16) MeV. The uncertainty on the log(f t)-value is dominated by uncertainty on the absolute β-decay branching ratio.…”

Section: Absolute Intensities and β Branching Ratiosmentioning

confidence: 99%

Beta-delayed proton emission from 21Mg

et al. 2015

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Abstract. Beta-delayed proton emission from 21 Mg has been measured at ISOLDE, CERN, with a detection setup including particle identification capabilities. β-delayed protons with center of mass energies between 0.39 MeV and 7.2 MeV were measured and used to determine the half life of 21 Mg as 118.6±0.5 ms. From a line shape fit of the βp branches we extract spectroscopic information about the resonances of 21 Na. Finally an improved interpretation of the decay scheme in accordance with the results obtained in reaction studies is presented.PACS. 23.40.Hc Relation with nuclear matrix elements and nuclear structure -27.30.+t 20 ≤ A ≤ 38 -29.30.Ep Charged-particle spectroscopy

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A parametrization of the phase space factor for allowed β-decay

Cited by 167 publications

References 26 publications

Precision measurement of the6He half-life and the weak axial current in nuclei

Precision measurement of the6He half-life and the weak axial current in nuclei

Orbital electron capture by the nucleus

Beta-delayed proton emission from 21Mg

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