Measurement of
 β
 −
 -decay continuum spectrum of
 138
 La

Giaz, A.; Gosta, G.; Camera, F.; Riboldi, S.; Blasi, N.; Bracco, A.; Brambilla, S.; Million, B.

doi:10.1209/0295-5075/110/42002

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…Recently, the development of LaBr 3 and LaCl 3 scintillation detectors has enabled new measurements of the 138 La β-decay and EC x-ray spectra [29][30][31][32]. From these measurements, more precise determinations of the relative EC probabilities and the β-decay spectrum shape can be made and compared with theoretical calculations.…”

Section: Introductionmentioning

confidence: 99%

Direct determination of the La138β -decay Q value using Penning trap mass spectrometry

et al. 2019

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Background: The understanding and description of forbidden decays provides interesting challenges for nuclear theory. These calculations could help to test underlying nuclear models and interpret experimental data.Purpose: Compare a direct measurement of the 138 La β-decay Q value with the β-decay spectrum end-point energy measured by Quarati et al. using LaBr3 detectors [Appl. Radiat. Isot. 108, 30 (2016)]. Use new precise measurements of the 138 La β-decay and electron capture (EC) Q values to improve theoretical calculations of the β-decay spectrum and EC probabilities.Method: High-precision Penning trap mass spectrometry was used to measure cyclotron frequency ratios of 138 La, 138 Ce and 138 Ba ions from which β-decay and EC Q values for 138 La were obtained.Results: The 138 La β-decay and EC Q values were measured to be Q β = 1052.42(41) keV and QEC = 1748.41(34) keV, improving the precision compared to the values obtained in the most recent atomic mass evaluation [Wang, et al., Chin. Phys. C 41, 030003 (2017)] by an order of magnitude. These results are used for improved calculations of the 138 La β-decay shape factor and EC probabilities. New determinations for the 138 Ce 2EC Q value and the atomic masses of 138 La, 138 Ce, and 138 Ba are also reported. Conclusion:The 138 La β-decay Q value measured by Quarati et al. is in excellent agreement with our new result, which is an order of magnitude more precise. Uncertainties in the shape factor calculations for 138 La β-decay using our new Q value are reduced by an order of magnitude. Uncertainties in the EC probability ratios are also reduced and show improved agreement with experimental data.

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Section: Introductionmentioning

confidence: 99%

Direct determination of the La138β -decay Q value using Penning trap mass spectrometry

et al. 2019

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“…We also note that there is no spurious signal at 0 ns, Fig. 7, caused by positive space charge hence reduced low energy spectral shoulder [37] is expected beside the Compton scattering contribution. The effect of holes is also reduced regardless of assumptions made in our simulations.…”

Section: Differential Current Sensingmentioning

confidence: 55%

Efficient Charge Collection in Coplanar-Grid Radiation Detectors

Kunc¹,

Praus²,

Belas³

et al. 2018

Phys. Rev. Applied

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We have modeled laser-induced transient current waveforms in radiation coplanar grid detectors. Poisson's equation has been solved by finite element method and currents induced by photogenerated charge were obtained using Shockley-Ramo theorem. The spectral response on a radiation flux has been modeled by Monte-Carlo simulations. We show 10× improved spectral resolution of coplanar grid detector using differential signal sensing. We model the current waveform dependence on doping, depletion width, diffusion and detector shielding and their mutual dependence is discussed in terms of detector optimization. The numerical simulations are successfully compared to experimental data and further model simplifications are proposed. The space charge below electrodes and a non-homogeneous electric field on a coplanar grid anode are found to be the dominant contributions to laser-induced transient current waveforms.

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Intrinsic background radiation of LaBr3(Ce) detector via coincidence measurements and simulations

et al. 2020

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Measurement of β ⁻ -decay continuum spectrum of ¹³⁸ La

Cited by 7 publications

References 24 publications

Direct determination of the La138β -decay Q value using Penning trap mass spectrometry

Direct determination of the La138β -decay Q value using Penning trap mass spectrometry

Efficient Charge Collection in Coplanar-Grid Radiation Detectors

Intrinsic background radiation of LaBr3(Ce) detector via coincidence measurements and simulations

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Measurement of β − -decay continuum spectrum of 138 La

Cited by 7 publications

References 24 publications

Direct determination of the La138β -decay Q value using Penning trap mass spectrometry

Direct determination of the La138β -decay Q value using Penning trap mass spectrometry

Efficient Charge Collection in Coplanar-Grid Radiation Detectors

Intrinsic background radiation of LaBr3(Ce) detector via coincidence measurements and simulations

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Measurement of β ⁻ -decay continuum spectrum of ¹³⁸ La