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Roger Wellum

Isotopic “fingerprints” for natural uranium ore samples
1999 · S Richter, A Alonso, et al. · International Journal of Mass Spectrometry · 192
The isotopic composition of natural uranium samples—Measurements using the new n(233U)/n(236U) double spike IRMM-3636
2007 · S. Richter, A. Alonso-Munoz, et al. · International Journal of Mass Spectrometry · 99
A new series of uranium isotope reference materials for investigating the linearity of secondary electron multipliers in isotope mass spectrometry
2009 · S. Richter, A. Alonso, et al. · International Journal of Mass Spectrometry · 56
Characterization of Uranium Particles Produced by Hydrolysis of UF6Using SEM and SIMS
2007 · Ruth Kips, Ann Leenaers, et al. · Microscopy and Microanalysis · 48
Re-certification of a series of uranium isotope reference materials: IRMM-183, IRMM-184, IRMM-185, IRMM-186 and IRMM-187
2005 · S. Richter, A. Alonso, et al. · International Journal of Mass Spectrometry · 44
Evaluation of chronometers in plutonium age determination for nuclear forensics: What if the ‘Pu/U clocks’ do not match?
2014 · M. Sturm, S. Richter, et al. · Journal of Radioanalytical and Nuclear Chemistry · 38
Determination of fluorine in uranium oxyfluoride particles as an indicator of particle age
2008 · R. Kips, A.J. Pidduck, et al. · Spectrochimica Acta Part B Atomic Spectroscopy · 37
A new evaluation of the half-life of 241Pu
2009 · Roger Wellum, Andre Verbruggen, et al. · Journal of Analytical Atomic Spectrometry · 31
On the determination of the true dead-time of a pulse-counting system in isotope ratio mass spectrometry
2001 · H. Ramebäck, M. Berglund, et al. · Journal of Analytical Atomic Spectrometry · 30
Evaluating the status of uranium isotope ratio measurements using an inter-laboratory comparison campaign
2007 · S. Richter, A. Alonso, et al. · International Journal of Mass Spectrometry · 26
Evaluation of the n(235U)/n(238U) isotope ratio measurements in a set of uranium samples by thermal ionization mass spectrometry
2005 · O. Pereira de Oliveira, W. De Bolle, et al. · International Journal of Mass Spectrometry · 19
The isotopic composition of commercially available uranium chemical reagents
1999 · S. Richter, A. Alonso, et al. · Journal of Analytical Atomic Spectrometry · 18
An inter-calibration campaign using various selected Pu spike isotopic reference materials
2010 · R. Jakopič, A. Verbruggen, et al. · Journal of Radioanalytical and Nuclear Chemistry · 17
Preparation and certification of synthetic uranium isotope mixtures with 236U/238U ratios of 10–6, 10–7, 10–8
2005 · S. Richter, A. Alonso, et al. · Journal of Analytical Atomic Spectrometry · 17
Demonstrating the metrological compatibility of uranium isotope amount ratio measurement results obtained by GSMS, TIMS and MC-ICPMS techniques
2010 · O. Pereira de Oliveira, W. De Bolle, et al. · International Journal of Mass Spectrometry · 15
Certification of a new series of gravimetrically prepared synthetic reference materials for n(236U)/n(238U) isotope ratio measurements
2009 · Stephan Richter, Adolfo Alonso, et al. · Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms · 15
Application of consistency checking to evaluation of uncertainty in multiple replicate measurements
2008 · Rüdiger Kessel, Michael Berglund, et al. · Accreditation and Quality Assurance · 15
Basic characterization of 233U: Determination of age and 232U content using sector field ICP-MS, gamma spectrometry and alpha spectrometry
2008 · H. Ramebäck, U. Nygren, et al. · Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms · 15
Optimized Chemical Separation and Measurement by TE TIMS Using Carburized Filaments for Uranium Isotope Ratio Measurements Applied to Plutonium Chronometry
2016 · Monika Sturm, Stephan Richter, et al. · Analytical Chemistry · 12
How to Treat Correlation in the Uncertainty Budget, When Combining Results From Different Measurements
2001 · RÜDIGER KESSEL, MICHAEL BERGLUND, et al. · Advanced Mathematical and Computational Tools in Metrology (AMCTM) · 12
Energy released by beta radiation following fission. Part I—235U data
1970 · T.D. MacMahon, R. Wellum, et al. · Journal of Nuclear Energy · 12
Some Cumulative Mass-Yields from the Fission of 238U by 3 MeV Neutrons
1970 · S. J. Lyle, R. Wellum · Radiochimica Acta · 12
Preparation, Certification and Validation of a Stable Solid Spike of Uranium and Plutonium Coated with a Cellulose Derivative for the Measurement of Uranium and Plutonium Content in Dissolved Nuclear Fuel by Isotope Dilution Mass Spectrometry
2008 · Naoki Surugaya, Toshiaki Hiyama, et al. · Analytical Sciences · 11
234U/235U activity ratios as a probe for the 238U/235U half-life ratio
2008 · S. Pommé, E. García-Toraño, et al. · Journal of Radioanalytical and Nuclear Chemistry · 10
Results for the “REIMEP 18” inter-laboratory comparison campaign for the measurement of uranium isotope ratios
2006 · S. Richter, R. Wellum · Geochimica et Cosmochimica Acta · 9
Works count: 95
Citation count: 880
H-index: 15
I10-index: 24
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