Fast Chemical Separation of Technetium from Fission Products and Decay Studies of <sup>109</sup>Tc and <sup>110</sup>Tc

Altzitzoglou, T.; Rogowski, J.; Skålberg, Μ.; Alstad, J.; Herrmann, G.; Kaffrell, Ν.; Skarnemark, Gunnar; Talbert, W.L.; Trautmann, Ν.

doi:10.1524/ract.1990.51.4.145

Cited by 19 publications

(10 citation statements)

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“…Fig. 3 shows as an example the on-line isolation of short-lived technetium isotopes [62]. For the production of these isotopes a Cf-249 target was irradiated at the Mainz TRIGA reactor with thermal neutrons and the recoil fission products were transported from the target position by a nitrogen/KCl gas jet to the separation system SISAK 3.…”

Section: Continuous Separation Proceduresmentioning

confidence: 99%

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Fast chemical separations and laser mass spectrometry – tools for nuclear research

Trautmann

Wendt

2012

Radiochimica Acta

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Fast chemical methods / Discontinuous and continuous separation procedures / Investigation of short-lived nuclei / Resonance ionization mass spectrometry (RIMS) / Ultra trace analysis of plutonium and neptunium / First ionization potentials of the actinides and technetiumSummary. Fast chemical separation procedures applied in nuclear research require dedicated experimental techniques. Rapid discontinuous separation procedures are illustrated by an example to isolate technetium from fission products. The use of a gas jet and its combination with a thermochromatographic separation and with the continuous solvent extraction technique SISAK is described and examples are given for the investigation of short-lived fission products. The potential of resonance ionization mass spectrometry (RIMS) as a highly sensitive technique using different experimental systems is outlined for ultra trace analysis of long-lived plutonium and neptunium isotopes, including isotope ratio measurements of the plutonium isotopes. In addition, the precise determination of the first ionization potentials (IP) of ten actinide elements up to einsteinium and of technetium carried out by using the photoionization threshold method and requiring sample sizes of ∼ 10 12 atoms is presented.

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Section: Continuous Separation Proceduresmentioning

confidence: 99%

“…3. Flow sheet for the separation of technetium from fission products by solvent extraction using SISAK 3 [62].…”

Section: Continuous Separation Proceduresmentioning

confidence: 99%

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Fast chemical separations and laser mass spectrometry – tools for nuclear research

Trautmann

Wendt

2012

Radiochimica Acta

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“…The centrifuge system SISAK-3 permits on-line solvent extraction experiments with nuclides having half-lives down to about one second [9,10]. It was the objective of the present investigation to explore the possibilities * Present address: Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720, USA.…”

Section: Introductionmentioning

confidence: 99%

Fast On-line Solvent Extraction with the SISAK-3 Centrifuge System as a Test of Chemical Studies of the Elements 105 and 106

et al. 1995

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The fast centrifuge system SISAK-3 has been applied to study in on-line experiments the chemical behavior of the homologs of Elements 105 and 106. Using 0.046 M trioctylamine dissolved in Shellsol T, the Group 5 homologs of Element 105 and the Group 6 homologs of Element 106 can be extracted from an unbuffered 1.0 M α-hydroxyisobutyric acid solution with yields between 60% and 100%. Group 4 homologs of Element 104 and the lanthanides remain in the aqueous phase. Similar results were observed using lactic acid solutions.

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“…Ru by gamma spectroscopy after the rapid extraction of 110 Tc [Altzitzoglou 1990]. The purpose of the following experiment was a first attempt to chemically separate and identify hahnium using SISAK, as well as to perform an operational test using protactinium produced on-line.…”

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Properties of Group Five and Group Seven transactinium elements

Wilk

2001

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The detection and positive identification of the short-lived, low cross section isotopes used in the chemical studies of the heaviest elements are usually accomplished by measuring their α-decay, thus the nuclear properties of the heaviest elements must be examined simultaneously with their chemical properties. The isotopes 224 Pa and 266,267 Bh have been studied extensively as an integral part of the investigation of the heaviest members of the groups five and seven of the periodic table.The half-life of 224 Pa was determined to be 855±19 ms by measuring its α-decay using our rotating wheel, solid state detector system at the Lawrence Berkeley National Laboratory 88-Inch Cyclotron. Protactinium was produced by bombardment of a bismuth target. New neutron rich isotopes, MeV.The chemical behavior of hahnium, Ha (element 105) was investigated using the fast on-line continuous liquid extraction and detection system SISAK-LISSY.Hahnium was not observed in this experiment following transport and extraction.Protactinium was used as on-line test of the apparatus to determine the experimental efficiency of the entire system. Unfortunately, the amount of protactinium observed after the extraction, compared to the amount produced, was extremely small, only 2.5%. The extraction of the protactinium test isotope indicated the efficiency of the apparatus was too low to observe the extraction of hahnium.The chemical behavior of oxychloride compounds of bohrium was investigated by isothermal gas adsorption chromatography in a quartz column at 180, 150, and 75°C. It was found to be less volatile than the corresponding compounds of the lighter group seven homologues, rhenium and technetium, which had been measured previously with the same apparatus. Assuming the bohrium compound to be BhO 3 Cl, the evaluated standard adsorption enthalpy, ∆H ads , of BhO 3 Cl on the quartz surface was calculated from Monte Carlo fits to the volatility data to be DedicationThis thesis is dedicated to the Reed Reactor Facility (RRF) of Reed College, Portland, Oregon and the Summer School in Nuclear Chemistry that was sponsored by the Division of Nuclear Chemistry and Technology of the American Chemical Society. These two institutions have maintained a commitment to undergraduate education in the field of nuclear chemistry that is unparalleled. It is my hope that Reed will soon replace the long missing radiochemistry professor of the chemistry department to echo this commitment to nuclear and radiochemistry. Without the education and the experience I received from the RRF and the contacts I made at the ACS summer school, I certainly would not be writing this thesis. No changes were made to the structure of the Periodic Table until 1944, when Glenn T. Seaborg postulated the existence of the actinide series, analogous to the lanthanide series (see Figure 1.1) [Seaborg 1945]. This seemingly simple extrapolation was not obvious given the data at the time, and led to the nearly immediate discovery of americium and curium. Before Seaborg's fo...

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Fast Chemical Separation of Technetium from Fission Products and Decay Studies of ¹⁰⁹Tc and ¹¹⁰Tc

Cited by 19 publications

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Fast chemical separations and laser mass spectrometry – tools for nuclear research

Fast chemical separations and laser mass spectrometry – tools for nuclear research

Fast On-line Solvent Extraction with the SISAK-3 Centrifuge System as a Test of Chemical Studies of the Elements 105 and 106

Properties of Group Five and Group Seven transactinium elements

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Fast Chemical Separation of Technetium from Fission Products and Decay Studies of 109Tc and 110Tc

Cited by 19 publications

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Fast chemical separations and laser mass spectrometry – tools for nuclear research

Fast chemical separations and laser mass spectrometry – tools for nuclear research

Fast On-line Solvent Extraction with the SISAK-3 Centrifuge System as a Test of Chemical Studies of the Elements 105 and 106

Properties of Group Five and Group Seven transactinium elements

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Fast Chemical Separation of Technetium from Fission Products and Decay Studies of ¹⁰⁹Tc and ¹¹⁰Tc