Half-Lives of Radionuclides—IV

Emery, J.F.; Reynolds, S.A.; Wyatt, E. I.; Gleason, G.I.

doi:10.13182/nse72-a22489

Cited by 273 publications

(35 citation statements)

References 26 publications

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“…2. The measured half-life is in good agreement with the earlier measurement [12] for this nucleus. The weighted average value of T 1/2 of present and three earlier results [3, 12, 13] is 22.28(7) hrs.…”

Section: Resultssupporting

confidence: 90%

Decay measurements of⁴³K(β⁻)⁴³Ca by HRS and TAS

et al. 2017

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Abstract. In this work, decay spectroscopy of neutron-rich 43 K has been performed at the Radioactive Ion Beam (RIB) facility at Variable Energy Cyclotron Centre (VECC), Kolkata by producing it with an 18-MeV alpha beam on 40 Ar gas target. The beam was delivered from the K130 Cyclotron and the gas jet recoil transport system was used to move the products to a low-background site. The β-feeding intensities were measured by both high resolution γ -ray spectroscopy and total absorption γ -ray spectroscopy methods in order to address mainly the anomalies (if any) in the feeding to J ≥ 1 levels reported earlier. The decay half-life of 43 K was also measured to be 22.4(1) hrs.

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Section: Resultssupporting

confidence: 90%

Decay measurements of⁴³K(β⁻)⁴³Ca by HRS and TAS

et al. 2017

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“…Therefore we performed a test of the potential isotope fractionation of Be during cation exchange. We performed isotope ratio measurements of aliquots of the eluates of both column methods (HNO 3 and HCl) using dil1 as a bracketing standard. The measured 10 Be/ 9 Be ratios agree within the achieved measurement uncertainty obtained with MC-ICP-MS (Fig.…”

Section: Methods and Analytical Techniques 21 Source And Preparationmentioning

confidence: 99%

Determination of the 10Be half-life by multicollector ICP-MS and liquid scintillation counting

Chmeleff

Blanckenburg

Kossert

et al. 2010

Nuclear Instruments and Methods in Physics Research Section B:

859

525

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A new method was designed and used for determining the half-life of the isotope 10 Be. The method is based on (1) accurate 10 Be/ 9 Be measurements of 9 Be-spiked solutions of a 10 Be-rich master solution using multicollector ICP mass spectrometry (MC-ICP-MS) and (2) liquid scintillation counting (LSC) using the CIEMAT/NIST method for determining the activity concentrations of the solutions whose 10 Be concentrations were determined by mass spectrometry. Important requirements for the success of this approach a) was the previous coating of glass ampoules filled for counting experiments with 9 Be, thereby reducing the risk of the adsorptive loss of 10 Be; b) the removal of Boron from solutions to be measured by MC-ICP-MS by cation chromatography without the introduction of mass fractionation and c) the accurate determination of the mass bias of 10 Be/ 9 Be measurements by ICP-MS which are always affected by the space-charge effect. The mass bias factor was determined to be 1.1862 ± 0.071 for 10 Be/ 9 Be from careful fitting and error propagation of ratios of measured Li, B, Si, Cr, Fe, Cu, Sr, Nd, Hf, and Tl standard solutions of known composition under the same measurement conditions. Employing this factor, an absolute 10 Be/ 9 Be ratio of 1.464 ± 0.014 was determined for a first dilution of the 10 Be-rich master solution. This solution is now available as an absolute Be ratio standard in AMS measurements. Finally, a half-life of (1.386 ± 0.016) My (standard uncertainty) was calculated. This value is much more precise than previous estimates and was derived from a fully independent set of experiments. In a parallel, fully independent study using the same master solution, [35] have determined a half life of (1.388 ± 0.018) My. The combined half life and uncertainty amounts to (1.387 ± 0.012) My. We suggest the use of this value in nuclear studies and in studies that make use of cosmogenic 10 Be in environmental and geologic samples.

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“…The first published values (from 1958 and 1990) for the determination of the half-life used 177 Lu from the 176 Lu(n,γ ) 177 Lu reaction, however no correction was applied for the presence of the 177m Lu impurity, resulting in an overestimation of the half-lives values determined [6][7][8]10], with the exception of the value reported by Lagoutine and Legrand (1982) [9].…”

Section: Discussionmentioning

confidence: 99%

“…Lutetium-177 decays by the emission of medium energy β particles with a maximum β energy of 498.3 (8) keV to excited and ground states of the stable 177 Hf nucleus [3]. These β particles have a maximum tissue penetration of approximately 1-2 mm [4].…”

Section: Introductionmentioning

confidence: 99%

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Half-life measurement of the medical radioisotope ¹⁷⁷Lu produced from the ¹⁷⁶Yb(n,γ) reaction

2017

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Abstract. 177 Lu is a medium energy beta-emitter commonly used in Nuclear Medicine for radiotherapeutic applications. In this work, the half-life of 177 Lu has been measured using a re-entrant ionisation chamber over a period of 82 days (approximately 12 half-lives). Unlike the majority of previous studies, the material used in this work was produced via the 176 Yb(n,γ ) 177 Yb reaction followed by the β-decay to 177 Lu, producing insignificant quantities of 177m Lu. This has resulted in the most precise half-life measurement of 177 Lu to date. A half-life of 6.6430 (11) days has been determined. This value is in statistical agreement with the currently recommended half-life of 6.6463 (15) days (z-score = 1.8).

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Half-Lives of Radionuclides—IV

Cited by 273 publications

References 26 publications

Decay measurements of⁴³K(β⁻)⁴³Ca by HRS and TAS

Decay measurements of⁴³K(β⁻)⁴³Ca by HRS and TAS

Determination of the 10Be half-life by multicollector ICP-MS and liquid scintillation counting

Half-life measurement of the medical radioisotope ¹⁷⁷Lu produced from the ¹⁷⁶Yb(n,γ) reaction

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Half-Lives of Radionuclides—IV

Cited by 273 publications

References 26 publications

Decay measurements of43K(β−)43Ca by HRS and TAS

Decay measurements of43K(β−)43Ca by HRS and TAS

Determination of the 10Be half-life by multicollector ICP-MS and liquid scintillation counting

Half-life measurement of the medical radioisotope 177Lu produced from the 176Yb(n,γ) reaction

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Decay measurements of⁴³K(β⁻)⁴³Ca by HRS and TAS

Decay measurements of⁴³K(β⁻)⁴³Ca by HRS and TAS

Half-life measurement of the medical radioisotope ¹⁷⁷Lu produced from the ¹⁷⁶Yb(n,γ) reaction