Spontaneous fission yields for<sup>238</sup>U in molybdenum measured in Archaean zircons

Wieser, Michael E.; Laeter, J. R. De

doi:10.1023/b:jrnc.0000030940.80383.de

Cited by 4 publications

(5 citation statements)

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“…But, the higher values of mass yields in the modified statistical model are obtained for A L =90, and 97-99 as the experimental data. On the other hand, Wieser [4] showed that the fission fragments yield for mass number A L =98 is not significantly different from the fragments yield for the mass numbers around it (i. e. A=96 and 99). This point is clearly seen in the results of the modified statistical model in table 1, when the values of mass yields for the mass numbers around 98 are in a range.…”

Section: Resultsmentioning

confidence: 95%

“…Also, the calculated charge numbers of this equation were re-examined with the experimental data such as [4,36].…”

Section: The Wkb Approximation Modelmentioning

confidence: 99%

“…With these advances, the experimental results have become more accurate. Recently, mass yields of 238 U have been measured using sensitive thermal ionization mass spectrometry and radiochemical methods, indicating that there is no evidence for a significant isotope anomaly at mass 98 [4].…”

Section: Introductionmentioning

confidence: 99%

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Mass yield of spontaneous fission of ²³⁸ U within the systematic statistical scission-point model

Kaldiani

2020

Phys. Scr.

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The spontaneous fission fragments mass yield of 238U is calculated with two models: WKB approximation model and statistical scission-point model. The results are compared with experimental data. This shows that the statistical scission-point model results are closer to the experimental data of the spontaneous fission fragments mass distributions than the WKB model. Also, experimental values are obtained by changing the deformation parameter for light fragments. The influence of temperature, deformation parameters, and pairing energy on the spontaneous fission fragments mass yield has been investigated within the statistical scission-point model. Adding the pairing correction energy to the total energy of the fission system adds some oscillations in theoretical results of fission fragments mass yields, also the inclusion of fission fragments temperature regardless of the pairing energy causes some theoretical results to be overestimated compared to the experimental data. It is seen that adding the pairing correction energy with the fragments temperature together leads to acceptable results compared to the experimental values. Therefore, the theoretical results of the systematic modified statistical scission-point model are in good agreement with the experimental values. This shows that although the statistical model is commonly used for the even–even isotopes, all isotopes can be investigated using the modified statistical model.

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Section: Resultsmentioning

confidence: 95%

“…Also, the calculated charge numbers of this equation were re-examined with the experimental data such as [4,36].…”

Section: The Wkb Approximation Modelmentioning

confidence: 99%

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Mass yield of spontaneous fission of ²³⁸ U within the systematic statistical scission-point model

Kaldiani

2020

Phys. Scr.

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“…High‐sensitivity AMS has also been successfully adopted to measure spontaneous fission products (Fabryka‐Martin et al, 1989). Hidaka and Masuda (1993) successfully measured the spontaneous cumulative fission yields of Ru and Te in uraninite ore samples with TIMS, whereas Wieser and De Laeter (2004) have measured similar yields for Mo with TIMS. The measurement of the Mo fission yields were derived from 1.82 × 10 9 year old zircons, to enable the effect of the slow disintegration rate of 238 U spontaneous fission to be negated.…”

Section: Nuclear Fissionmentioning

confidence: 99%

Section: Nuclear Fissionmentioning

confidence: 99%

Nuclear applications of inorganic mass spectrometry

Laeter

2009

Mass Spectrometry Reviews

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There are several basic characteristics of mass spectrometry that are not always fully appreciated by the science community. These characteristics include the distinction between relative and absolute isotope abundances, and the influence of isotope fractionation on the accuracy of isotopic measurements. These characteristics can be illustrated in the field of nuclear physics with reference to the measurement of nuclear parameters, which involve the use of enriched isotopes, and to test models of s-, r-, and p-process nucleosynthesis. The power of isotope-dilution mass spectrometry (IDMS) to measure trace elements in primitive meteorites to produce accurate Solar System abundances has been essential to the development of nuclear astrophysics. The variety of mass spectrometric instrumentation used to measure the isotopic composition of elements has sometimes been accompanied by a lack of implementation of basic mass spectrometric protocols which are applicable to all instruments. These metrological protocols are especially important in atomic weight determinations, but must also be carefully observed in cases where the anomalies might be very small, such as in studies of the daughter products of extinct radionuclides to decipher events in the early history of the Solar System. There are occasions in which misleading conclusions have been drawn from isotopic data derived from mass spectrometers where such protocols have been ignored. It is important to choose the mass spectrometer instrument most appropriate to the proposed experiment. The importance of the integrative nature of mass spectrometric measurements has been demonstrated by experiments in which long, double beta decay and geochronological decay half-lives have been measured as an alternative to costly radioactive-counting experiments. This characteristic is also illustrated in the measurement of spontaneous fission yields, which have accumulated over long periods of time. Mass spectrometry is also a valuable tool in the determination of neutron capture cross-section measurements and the application of such determinations in Planetary Science.

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Isotope fractionation studies of molybdenum

Wieser

Laeter

Varner

2007

International Journal of Mass Spectrometry

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Spontaneous fission yields for²³⁸U in molybdenum measured in Archaean zircons

Cited by 4 publications

References 18 publications

Mass yield of spontaneous fission of ²³⁸ U within the systematic statistical scission-point model

Mass yield of spontaneous fission of ²³⁸ U within the systematic statistical scission-point model

Nuclear applications of inorganic mass spectrometry

Isotope fractionation studies of molybdenum

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Spontaneous fission yields for238U in molybdenum measured in Archaean zircons

Cited by 4 publications

References 18 publications

Mass yield of spontaneous fission of 238 U within the systematic statistical scission-point model

Mass yield of spontaneous fission of 238 U within the systematic statistical scission-point model

Nuclear applications of inorganic mass spectrometry

Isotope fractionation studies of molybdenum

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Product

Resources

About

Spontaneous fission yields for²³⁸U in molybdenum measured in Archaean zircons

Mass yield of spontaneous fission of ²³⁸ U within the systematic statistical scission-point model

Mass yield of spontaneous fission of ²³⁸ U within the systematic statistical scission-point model