Total absorption spectroscopy of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math>decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ga</mml:mi><mml:mprescripts /><mml:none /><mml:mn>76</mml:mn></mml:mmultiscripts></mml:math>

Dombos, A. C.; Fang, Dufei; Spyrou, A.; Quinn, S. J.; Simón, A.; Brown, B. A.; Cooper, K.; Gehring, Amanda; Liddick, S. N.; Morrissey, D. J.; Naqvi, F.; Sumithrarachchi, C. S.; Zegers, R. G. T.

doi:10.1103/physrevc.93.064317

Cited by 19 publications

(12 citation statements)

References 49 publications

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“…In addition to random correlation background, both room background and neutron-induced background contributions were investigated. These background contributions were found to be negligible in the β-coincidence gated γ spectra, similar to what was shown previously by Dombos et al [46]. The room background rate was observed at less than 3 kHz in the TAS spectra.…”

Section: Discussionsupporting

confidence: 90%

“…For each isotope of interest, a procedure similar to that described in Dombos et al [46] was used to determine βdecay intensities. As in that work, a combination of a folding procedure and χ 2 -minimization were used to determine the β-decay intensities.…”

Section: Discussionmentioning

confidence: 99%

“…The signals from the eight segments are summed together to create a total absorption spectrum, which is sensitive to the total energy of the γ cascade, and therefore the level populated by β decay. In addition to the TAS spectrum, the optical isolation of the eight segments provides γ-singles spectra as well, yielding information on the de-excitation of a level by γ emission [42,46]. The multiplicity, or number of segments that detect energy during an event, was determined for each decay.…”

Section: Methodsmentioning

confidence: 99%

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Co69,71 β -decay strength distributions from total absorption spectroscopy

et al. 2019

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Background: The rapid neutron capture process is one of the main nucleosynthesis processes of elements heavier than Fe. Uncertainties in nuclear properties, such as masses, half-lives, and β-delayed neutron probabilities can cause orders of magnitude of variation within astrophysical r-process simulations. Presently, theoretical models are used to make global predictions of various nuclear properties for the thousands of nuclei required for these simulations, and measurements are required to benchmark these models, especially far from stability. Purpose: β-decay strength distributions can be used to not only inform astrophysical r-process simulations, but also to provide a stringent test for theoretical calculations. The aim of this work is to provide accurate strength distributions for 69,71 Co β decay. Method: The technique of total absorption spectroscopy was used to measure the β decay of 69,71 Co for the first time at the National Superconducting Cyclotron Laboratory. The ions were implanted in a double-sided silicon strip detector at the center of the Summing NaI(Tl) detector and identified using standard particle identification methods. The response of the detection system to the β-decay electron and subsequent γ-ray radiation was fit to the observed experimental data using a χ 2-minimization technique. Results: β-feeding intensities and Gamow-Teller strength distributions were extracted from the fits of the experimental data. The β-decay intensities show that there is a large percentage of feeding to levels above 2 MeV, which have not been observed in previous studies. The resultant β-feeding intensities and Gamow-Teller strength distributions were compared to shell model and quasiparticle random phase approximation (QRPA) calculations. Conclusions: Comparing experimentally determined β-decay strength distributions provides a test of models, which are commonly used for global β-decay properties for astrophysical calculations. This work highlights the importance of performing detailed comparisons of models to experimental data, particularly far from stability and as close to the r-process path as possible.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Co69,71 β -decay strength distributions from total absorption spectroscopy

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“…The segmentation of SuN is powerful in that both the total energy deposited in SuN as well as the energy deposited in each segment is recorded for a given event. For β-decay experiments with SuN [19,20], this translates to knowing the level populated in the daughter nucleus and also the possible subsequent electromagnetic deexcitation of that level in the form of γ rays. Adding the histograms from all eight segments together produces the sum-of-segments spectrum in which individual γ rays can be identified, while adding together the energies of all eight segments on an event-by-event basis produces the TAS spectrum in which sum peaks that correspond to levels can be identified.…”

Section: Methodsmentioning

confidence: 99%

β-decay half-lives of neutron-rich nuclides in theA=100–110mass region

et al. 2019

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β-decay half-lives of neutron-rich nuclides in the A = 100-110 mass region have been measured using an implantation station installed inside of the Summing NaI(Tl) (SuN) detector at the National Superconducting Cyclotron Laboratory. Accurate half-lives for these nuclides are important for nuclear astrophysics, nuclear structure, and nuclear technology. The half-lives from the present work are compared with previous measurements, showing overall good agreement. I.

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“…Dombos, et al [27] studied 76 Ga β decay, an isotone of 74 Zn, allowing systematics to be used in their comparisons. This TAGS experiment was geared toward the neutrino-less double-β decay in 76 Ge.…”

Section: A the Pandemonium Effect In 74 Znmentioning

confidence: 99%

Updated β -decay measurement of neutron-rich Cu74

Tracy¹,

Winger²,

Rasco³

et al. 2018

Phys. Rev. C

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The β decay of neutron-rich 74 Cu has been studied at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. By using a high-resolution mass separator a purified 74 Cu beam was obtained, thus allowing decay through its isobar chain to stable 74 Ge without any decay chain member dominating. A total of 170 γ rays were associated with 74 Cu β decay with 111 placed in the 74 Zn level scheme. Updated β feeding intensities and estimated log(f t) values are presented, and new J π assignments are proposed using shell model calculations. The progression of simulated Total Absorption γ-ray Spectroscopy (TAGS) based on proposed levels and β-feeding values from previous measurements to this evaluation are presented and demonstrate the need for a TAGS measurements for this and similar decays.

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Total absorption spectroscopy of theβdecay ofGa76

Cited by 19 publications

References 49 publications

Co69,71 β -decay strength distributions from total absorption spectroscopy

Co69,71 β -decay strength distributions from total absorption spectroscopy

β-decay half-lives of neutron-rich nuclides in theA=100–110mass region

Updated β -decay measurement of neutron-rich Cu74

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