Author
J. Gray
Bio: J. Gray is an academic researcher from Argonne National Laboratory. The author has contributed to research in topics: Fission & Isotopes of samarium. The author has an hindex of 2, co-authored 3 publications receiving 68 citations.
Papers
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TL;DR: The total half-lives of 252Cf, 250Cf and 253Cf are 2.646 ± 0.004 years, 13·2 ± 0·5 years and 17·6 ± 0 ·2 days as mentioned in this paper.
57 citations
TL;DR: The fission cross-section of 229 Th for thermal neutrons has been determined by counting samples placed in the thermal column of the Argonne heterogeneous heavy-water reactor, CP-5.
10 citations
TL;DR: The thermal neutron fission cross-section of the 10·1 hr isomer of 244Am was determined by counting fissions induced by neutrons in the thermal column of the Argonne reactor CP-5 as mentioned in this paper.
2 citations
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TL;DR: It is shown that 252Cf-PDMS is capable of producing mass spectra of quasi-molecular ions for a wide variety of compounds, including amino acids, moderately large peptides, nucleotides, and natural products.
Abstract: We have shown that 252Cf-PDMS is capable of producing mass spectra of quasi-molecular ions for a wide variety of compounds, including amino acids, moderately large peptides, nucleotides, and natural products. Positive and negative ion mass spectra can be obtained, and in many cases quasi-molecular ions are observed in both. The method is nondestructive, as only a relatively few molecules are used and samples can be recovered after the measurement is made. Fragmentation patterns are obtained which can yield structure information. The present sensitivity of the method is at the nanogram level and there are possibilities for reducing this to picograms. The mass resolution is sufficient to give elemental identification up to mass 500. This may be extended to higher masses with improved time-of-flight techniques. There are indications that 252Cf-PDMS may extend the mass range of molecules that can be studied to as high as 3000 or more.
532 citations
TL;DR: In this paper, des different techniques d'ionisation for la spectrometrie de masse are presented, i.e., different techniques for different types of spectrometers.
Abstract: Presentation des differentes techniques d'ionisation pour la spectrometrie de masse. Mecanismes
157 citations
TL;DR: In this article, the authors described a 252 Cf-plasma desorption time-of-flight mass spectrometer using a single ion counting using fast pulse electronics techniques.
146 citations
01 Feb 1992-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, several objective data evaluation procedures have been suggested to detect, adjust or eliminate discrepant data sets, and assessed in terms of the published half-life data of 137Cs.
Abstract: Discrepant data sets are encountered in many areas of science and technology. Several objective data evaluation procedures have been suggested to detect, adjust or eliminate discrepant data. These techniques are reviewed, and assessed in terms of the published half-life data of 137Cs. A new three-step data evaluation procedure is also presented together with results of applying this method to half-life data for 90Sr, 137Cs, 154Eu and 252Cf.
65 citations
TL;DR: The total half-lives of 252Cf, 250Cf and 253Cf are 2.646 ± 0.004 years, 13·2 ± 0·5 years and 17·6 ± 0 ·2 days as mentioned in this paper.
57 citations