Production and isolation of 197m,gHg

Despotopulos, John D.; Kmak, Kelly N.; Shaughnessy, D. A.

doi:10.1007/s10967-018-5927-9

Cited by 10 publications

(9 citation statements)

References 12 publications

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“…The 4 He ions [27] were accelerated to an energy of 27 MeV, focused to the diameter of the target and delivered to a stack of foils bolted to a water-cooled beam stop [28]. The Mn target was mounted behind a Pt isotope-production target and thin Al foils [29]. The intervening experiment reduced the beam energy incident on the Mn target to 12.9 MeV [30,31], which is the threshold for the onset of the 55 Mn(α, 2n) 57 Co reaction [32].…”

Section: Methodsmentioning

confidence: 99%

Decay of Com58

Moody¹,

Gharibyan²,

Grant³

et al. 2019

Phys. Rev. C

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We have studied some of the nuclear decay properties of 58 Co m . The half-life is found to be (8.853 ± 0.023) hours, which is significantly different from the evaluations found in the literature. The absolute intensity of the 24.9-keV γ-ray emitted in the IT decay is (0.0387 ± 0.0016)%, in agreement with the calculated yield of a transition of M 3 multipolarity. We observe γ-ray photons from a previously unreported branch for EC decay, with an intensity of (0.00120 ± 0.00005)%, consistent with expectations from the calculation of log f t.

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Section: Methodsmentioning

confidence: 99%

Decay of Com58

Moody¹,

Gharibyan²,

Grant³

et al. 2019

Phys. Rev. C

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“…The tracer solutions of 197m Hg were prepared with activity concentrations ranging from 2 to 50 cps/20 μL. 197m Hg was produced and isolated carrier-free, as previously described. , …”

Section: Experimental Sectionmentioning

confidence: 99%

“…197m Hg was produced and isolated carrier-free, as previously described. 14,18 Activity Measurements. All activity measurements were performed on a high-purity germanium (HPGe) γ-ray spectrometer coupled with a multichannel analyzer (DSPEC, Ortec).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Unsaturated Sulfur Crown Ethers Can Extract Mercury(II) and Show Promise for Future Copernicium(II) Studies: A Combined Experimental and Computational Study

et al. 2021

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The unsaturated hexathia-18-crown-6 (UHT18C6) molecule was investigated for the extraction of Hg(II) in HCl and HNO3 media. This extractant can be directly compared to the recently studied saturated hexathia-18-crown-6 (HT18C6). The default conformation of the S lone pairs in UHT18C6 is endodentate, where the pocket of the charge density, according to the crystal structures, is oriented toward the center of the ring, which should allow better extraction for Hg(II) compared to the exodentate HT18C6. Batch study experiments showed that Hg(II) had better extraction at low acid molarity (ca. 99% in HCl and ca. 95% in HNO3), while almost no extraction was observed above 0.4 M HCl and 4 M HNO3 (<5%). Speciation studies were conducted with the goal of delineating a plausible extraction mechanism. Density functional theory calculations including relativistic effects were carried out on both Hg(II)-encapsulated HT18C6 and UHT18C6 complexes to shed light on the binding strength and the nature of bonding. Our calculations offer insights into the extraction mechanism. In addition to Hg(II), calculations were performed on the hypothetical divalent Cn(II) ion, and showed that HT18C6 and UHT18C6 could extract Cn(II). Finally, the extraction kinetics were explored to assess whether this crown can extract the short-lived Cn(II) species in a future online experiment.

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“…A literature review has shown that separation and purification of Ir can be achieved through chromatography methods [5,8,9]. Separations of Ir have been succesfully performed using cation and anion exchange resins [5,[10][11][12][13]. Separations of Ir in the literature are often carried out with the purpose to separate Ir from platinum metals and other metal impurities [10].…”

Section: Introductionmentioning

confidence: 99%

Improvements in iridium target chemistry

Marenco

Bond

Rusev

2023

J Radioanal Nucl Chem

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We developed and optimized the dissolution and separation chemistry of iridium (Ir) from irradiated Ir pellets and prepared Ir counting samples for analysis by a silicon drift detector. Previous Ir chemistry techniques used on the irradiated Ir pellets are tedious, lengthy, and require extra safety precautions and planning due to the use of perchloric acid in the dissolution step. The dissolution and separations method described in this paper are safer, eliminating the use of perchloric acid, more efficient, and can successfully replace the previous procedure.

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Production and isolation of 197m,gHg

Cited by 10 publications

References 12 publications

Decay of Com58

Decay of Com58

Unsaturated Sulfur Crown Ethers Can Extract Mercury(II) and Show Promise for Future Copernicium(II) Studies: A Combined Experimental and Computational Study

Improvements in iridium target chemistry

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