Shapes of the non-unique and unique first-forbidden β-spectra of 84Rb, 74As and 124I

Booij, H.M.W.; Hoek, E.A. Van; Molen, H. Van Der; Slot, W.F.; Blök, J.

doi:10.1016/0375-9474(71)90135-7

Cited by 31 publications

(4 citation statements)

References 24 publications

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“…The strongest contribution to the mass of 84 Sr stemmed from a study of the negatron decay of 84 Rb (1971Bo01 [37]), a weak decay branch (R = 3.8%) observed in addition to the main β + and channels. Booij et al produced a sample of 84 Rb by α bombardment of stable bromine.…”

mentioning

confidence: 99%

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

et al. 2007

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The atomic masses of the neutron-deficient radioactive rubidium isotopes [74][75][76][77]79,80,83 Rb have been measured with the Penning trap mass spectrometer ISOLTRAP. Using the time-of-flight cyclotron resonance technique, relative mass uncertainties ranging from 1.6 × 10 −8 to 5.6 × 10 −8 were achieved. In all cases, the mass precision was significantly improved as compared with the prior Atomic-Mass Evaluation; no significant deviations from the literature values were observed. The exotic nuclide 74 Rb, with a half-life of only 65 ms, is the shortest-lived nuclide on which a high-precision mass measurement in a Penning trap has been carried out. The significance of these measurements for a check of the conserved-vector-current hypothesis of the weak interaction and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix is discussed.

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confidence: 99%

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

et al. 2007

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“…The main observables for which experimental data are available [7,8] are the if-values for the fl-+-transitions to the 2 + states, the f~t-values for the transitions to the 0 + ground states and the shape factor for the fie-spectra (C(W,)). The expressions for these observables are:…”

Section: The Beta Decay Formalism In the Framework Of The Asymmetric mentioning

confidence: 99%

Competition between? +- and? ?-decays from the transitional nucleus74As

Cristu¹,

Holan²,

Faessler

et al. 1988

Z. Physik A - Atomic Nuclei

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A theoretical study of the 13 +-and /3--decays of the 74As nucleus is performed. Both non-relativistic and relativistic formfactor coefficients are calculated in the framework of the asymmetric rotor model with admixtures of two quasiparticles for transitional nuclei. The induced interactions are shown to have small contributions to the values of the formfactor coefficients in this case. The theoretical results for the principal observables are in good agreement with the experimental data in the case of the beta decays to the 2 + final states. The failure in describing the beta observables corresponding to the transitions to the ground states points to the existence of a more complex structure of the 0+-states in the daughter nuclei 74Se and 74Ge.

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“…It has been noted that many first-forbidden β-decay transitions, like the presently discussed one, in the mediummass A = 89 − 143 nuclei play a key role in reactor antineutrino spectra [9,10]. Only a handful of electron spectra corresponding to J + ↔ J − β transitions in this region has been measured and with a rather poor precision [11,12]. According to [9,10] the β spectra for the J + ↔ J − transitions, relevant for solving the reactor anomaly and spectral bump, deviate noticeably from the allowed shape, the deviation being approximately a linear function of the electron kinetic energy (see, e.g., Ref.…”

mentioning

confidence: 95%

Measurement of the Spectral Shape of the beta-decay of 137Xe to the Ground State of 137Cs in EXO-200 and Comparison with Theory

Kharusi,

Anton,

Badhrees

et al. 2020

Preprint

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We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden non-unique β-decay transition 137 Xe(7/2 − ) → 137 Cs(7/2 + ). The experimental data were acquired by the EXO-200 experiment during a deployment of an AmBe neutron source. The ultra-low background environment of EXO-200, together with dedicated source deployment and analysis procedures, allowed for collection of a pure sample of the decays, with an estimated signal-to-background ratio of more than 99-to-1 in the energy range from 1075 to 4175 keV. In addition to providing a rare and accurate measurement of the first-forbidden non-unique

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Shapes of the non-unique and unique first-forbidden β-spectra of 84Rb, 74As and 124I

Cited by 31 publications

References 24 publications

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

Competition between? +- and? ?-decays from the transitional nucleus74As

Measurement of the Spectral Shape of the beta-decay of 137Xe to the Ground State of 137Cs in EXO-200 and Comparison with Theory

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