Nuclear Data Sheets for A=171

Baglin, Coral M.; McCutchan, E. A.

doi:10.1016/j.nds.2018.08.002

Cited by 10 publications

(4 citation statements)

References 259 publications

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“…1. Excited nuclear states have typical energies E ex ∼ 10 keV, for instance, 66.7 keV for 171 Yb [21] (daughter isotope for 171 Tm) and 21.5 keV of 151 Eu [22] (daughter isotope of 151 Sm). They do not contribute to the spectrum near the endpoint for T e > Q − E ex .…”

Section: Crude Estimate Of Neutrino Capturementioning

confidence: 99%

Can we use heavy nuclei to detect relic neutrinos?

Mikulenko¹,

Cheipesh²,

Cheianov³

et al. 2021

Preprint

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Recent analysis of the viability of solid state-based relic neutrino detectors has revealed the fundamental necessity for the use of heavy, A > 100, βdecayers as neutrino targets. Of all heavy isotopes, 171 Tm and 151 Sm stand out for their sufficiently low decay energies, reasonable half-life times and stable daughter nuclei. However, the crucial bit of information, that is the soft neutrino capture cross-section is missing for both isotopes. The main reason for that is a particular type of β-decay, which precludes a simple link between the isotope's half-life time and the neutrino capture rate. Here we propose an experimental method to bypass this difficulty and obtain the capture cross-section of a soft neutrino by a given isotope from the isotope's β-spectrum. Contents 1 Introduction 1 2 Quantum mechanics of β-interaction and crude estimate of neutrino capture 3 2.1 Crude estimate of neutrino capture 4 3 Experimental determination of the neutrino capture rate from the end of the β decay spectrum 7 4 Conclusion and discussion 8

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Section: Crude Estimate Of Neutrino Capturementioning

confidence: 99%

Can we use heavy nuclei to detect relic neutrinos?

Mikulenko¹,

Cheipesh²,

Cheianov³

et al. 2021

Preprint

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“…The parameters were taken as described in Belgya et al [21]. The theoretical data from the TENDL-2017, Koning 2017 [22] and the TENDL-2019 [17] libraries (based on the modified TALYS 1.9 code, Koning 2017 [23] and standard input parameters) was also used for a comparison. For most activation products also the values for the TENDL-2015, calculated with an earlier TALYS version are shown in order to demonstrate only marginal differences between them.…”

Section: Model Calculationsmentioning

confidence: 99%

Investigation of the deuteron induced nuclear reaction cross sections on lutetium up to 50 MeV: review of production routes for 177Lu, 175Hf and 172Hf via charged particle activation

Tárkányi

Takács

Ditrói

et al. 2020

J Radioanal Nucl Chem

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In a systematic study of light charged particle induced nuclear reactions we investigated the excitation functions of deuteron induced nuclear reactions on natural lutetium targets. Experimental excitation functions up to 50 MeV on high purity nat Lu were determined using the standard stacked foil activation technique. High resolution off-line gamma-ray spectrometry was applied to assess the activity of each foil. From the measured activity direct and/or cumulative elemental cross-section data for production of 171,172,173,175 Hf, 171,172,173,174g,176m,177m,177g Lu and 169 Yb radioisotopes were determined. The experimental data were compared to results of the TALYS theoretical code taken from the TENDL databases and results of our calculations using the ALICE-IPPE-D and the EMPIRE-D codes. No earlier experimental data were found in the literature. Thick target yields for the investigated radionuclides were calculated from the measured excitation functions.

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“…Therefore, systematical studies of the contributions of allowed and forbidden transitions are needed, and a reliable and fast formula for calculating the decay half-life is of great importance. Recent experimental measurements of the contribution of FF transitions to the -decay half-life focused mainly on heavy nuclei with mass number higher than 100 near the stable line [31][32][33][34][35]. In general, experimental data for neutron-rich nuclei are still very rare, especially in the region of heavy nuclei.…”

Section: β− β−mentioning

confidence: 99%

The contribution of the first forbidden transitions to the nuclear β⁻-decay half-life *

et al. 2019

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-decay half-life is a key quantity for nuclear structure and nucleosynthesis studies. There exist large uncertainties in the contributions of allowed and forbidden transitions to the total -decay life, which limits the resolution of the predicted -decay half-life. We systematically study the contribution of the first forbidden (FF) transitions to the -decay half-life, and quantify it with a formula based on simple physics considerations. We also propose a new formula for calculation of the -decay half-life that includes the FF contribution. It is shown that the inclusion of the contribution of FF transitions significantly improves the precision of calculations of the -decay half-life. By fitting of the RQRPA results for neutron-rich , 57 isotopes and , 94 isotones, the formula for the contribution of the FF transitions gives similar results as the RQRPA calculations. However, because of limited experimental data for the branching ratios of unstable nuclei, the fit parameters are not fully constrained. Therefore, the proposed formula for the -decay half-life is more suitable for calculations of half-lives than of the FF contributions. The formula could be used to predict the -decay half-life in nuclear structure studies as well as nucleosynthesis calculations in stars.

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Nuclear Data Sheets for A=171

Cited by 10 publications

References 259 publications

Can we use heavy nuclei to detect relic neutrinos?

Can we use heavy nuclei to detect relic neutrinos?

Investigation of the deuteron induced nuclear reaction cross sections on lutetium up to 50 MeV: review of production routes for 177Lu, 175Hf and 172Hf via charged particle activation

The contribution of the first forbidden transitions to the nuclear β⁻-decay half-life *

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Nuclear Data Sheets for A=171

Cited by 10 publications

References 259 publications

Can we use heavy nuclei to detect relic neutrinos?

Can we use heavy nuclei to detect relic neutrinos?

Investigation of the deuteron induced nuclear reaction cross sections on lutetium up to 50 MeV: review of production routes for 177Lu, 175Hf and 172Hf via charged particle activation

The contribution of the first forbidden transitions to the nuclear β−-decay half-life *

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The contribution of the first forbidden transitions to the nuclear β⁻-decay half-life *