Half-Lives of Radionuclides—III

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

doi:10.13182/nse68-a18822

Cited by 151 publications

(7 citation statements)

References 11 publications

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“…The use ofa Ge(Li) detector is very suited especially with respect to the discrimination against contributions from possible radioactive contaminations which may have caused the values being about 2% higher than the present result. The result of T,/2(95Nb) = (34.97 _+0.03) days is only 0.5% lower than the value of (35.15+0.03)days given by Reynolds et al [14], but the uncertainty limits do not overlap.…”

Section: Discussioncontrasting

confidence: 63%

See 1 more Smart Citation

Accurate determination of the half-lives of95Zr and95Nb

Hansen¹,

Grosse²,

Mouchel³

et al. 1976

Z Physik A

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The half-lives of 95Zr and 95Nb have been determined by 7-ray counting using a Ge(Li) detector and a NaI(T1) crystal. Data have been recorded at regular time intervals during time periods up to nine times the respective half-life. The obtained results are T1/z(95Zr)= (64.05_+0.06)days and T1/z(95Nb)=(34.97 _+0.03) days. A detailed discussion of the measurements and the uncertainty assignment is given.

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Section: Discussioncontrasting

confidence: 63%

“…In the case of 95Nb previous results tend to be somewhat higher than 35 days. The result given with the highest accuracy is 35.15 days [14]. The associated uncertainty of _+0.08 ~,~ is the standard deviation in the least squares fit to the data and contains no information on possible systematic errors.…”

Section: Introductionmentioning

confidence: 99%

Accurate determination of the half-lives of95Zr and95Nb

Hansen¹,

Grosse²,

Mouchel³

et al. 1976

Z Physik A

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“…The correction for the change in sample mass due to the decay of 151 Sm is slightly affected by the uncertainty of the half-life. The 151 Sm mass at the time of the measurement was determined using the value of t 1/2 = 93 ± 8 y of Reynolds [35], whereas the latest compilation recommends a half-life of 90 ± 8 y [36]. However, this difference translates only into a systematic uncertainty of 0.2% for the 151 Sm mass.…”

Section: Discussion Of Uncertaintiesmentioning

confidence: 99%

Stellar neutron capture cross section of the unstables-process branching pointSm151

Wisshak¹,

Voß²,

Käppeler³

et al. 2006

Phys. Rev. C

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The neutron capture cross sections of the radioactive isotope 151 Sm and of natural samarium have been measured in the energy range from 3 keV to 225 keV at the Karlsruhe 3.7 MV Van de Graaff accelerator. Neutrons were produced via the 7 Li(p, n) 7 Be reaction by bombarding metallic Li targets with a pulsed proton beam and capture events were registered with the Karlsruhe 4π Barium Fluoride Detector. The cross sections were determined relative to the gold standard using a 206 mg sample of samarium oxide with 90% enrichment in 151 Sm. Over most of the measured energy range uncertainties of ∼2-3% could be achieved for the 151 Sm/ 197 Au ratio. Maxwellian averaged neutron capture cross sections of 151 Sm were calculated for thermal energies between kT = 8 keV and 100 keV with due consideration of the stellar enhancement factor and were found to be systematically larger than all previous theoretical predictions used in the analysis of the s-process branching at 151 Sm. In the context of the branching analysis, an experimental determination of the stellar enhancement factor due to captures in thermally excited states is proposed, and the tentative determination of the p-process residual of 152 Gd and a few other cases is discussed.

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“…5). A weighted average of reported data [4][5][6][7][8][9] and our work gives the value of 61.79 (7) h.…”

Section: Resultsmentioning

confidence: 63%