AMS at the National Institute of Nuclear Physics and Engineering in Bucharest

Stan-Sion, C.; Ivaşcu, M.; Plostinaru, D.; Catanǎ, D.; Marinescu, L.; Radulescu, Matei I.; Nolte, E.

doi:10.1016/s0168-583x(00)00283-4

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…14 C high concentrations AMS experiments have been performed at our analyzing machine built on the multipurpose 9 MV FN tandem accelerator in Bucharest (FN is the accelerator type of 3.66 m in diameter, 13.4 m long, rated at a terminal voltage of 7.5 MV and known to run reliable at even 11 MV) (Stan-Sion et al 2000, 2010).…”

Section: Experimental Methodsmentioning

confidence: 99%

¹⁴C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors

Enăchescu

Stan-Sion

2019

Radiocarbon

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Decommissioning of nuclear reactors requires determination of all remnant long-lived isotopes that were produced during their long functioning time of the respective facilities. Radiocarbon (14C) is such an isotope (T1/2 = 5730 yr), widely produced by neutron reactions in a thermal column of a nuclear reactor. Accelerator mass spectrometry (AMS) uses 14C for precise dating of up to 50,000 years old archaeological artifacts. This study presents a premier AMS measurement of high concentrated 14C samples that are strictly forbidden in laboratories dedicated to perform 14C dating. The determined 14C activities range from the natural level (isotopic ratio 14C/12C = 1.2 × 10–12) up to values of 10,000 times higher. 14C bulk and depth profile concentrations were measured in the thermal column disks of a decommissioned nuclear reactor. Results have shown that the 14C concentration in the thermal column, close the reactor core is about 75 kBq/g and decreases to 0.7 Bq/g and the end of the column. Such AMS measurements are applicable for decommissioning and waste management of nuclear reactors.

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Section: Experimental Methodsmentioning

confidence: 99%

¹⁴C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors

Enăchescu

Stan-Sion

2019

Radiocarbon

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“…Indeed, a few seconds of exposure to a picoampere beam will render most SSBDs defunct. Instead, investigators have opted for gas-filled ionization chambers often with multielectrode geometries (Stan-Sion et al, 2000).…”

Section: E Ion Detectionmentioning

confidence: 99%

“…Other experimental scenarios have appeared, however, that either supplement or provide by other means the essential energy (and therefore q) information required for unambiguous ion identification. Notably, researchers are developing time-of-flight (TOF) systems as an alternative means to establish the velocity and consequently the energy and charge state of ions that have pre-selected m/q and K/q values (Müller et al, 1990;Stan-Sion et al, 2000, 2001. For terminal potentials near 3 MV, ions will have energies of from 4 to 21 MeV (þ1e q þ6e) depending on the charge state used for the analysis.…”

Section: E Ion Detectionmentioning

confidence: 99%

Issues and opportunities in accelerator mass spectrometry for stable isotopes

Matteson

2008

Mass Spectrometry Reviews

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Accelerator mass spectrometry (AMS) has developed in the last 30 years many notable applications to the spectrometry of radioisotopes, particularly in radiocarbon dating. The instrumentation science of trace element AMS (TEAMS) that analyzes stable isotopes, also called Accelerator SIMS or MegaSIMS, while unique in many features, has also shared in many of these significant advances and has pushed TEAMS sensitivity to concentration levels surpassing many competing mass spectroscopic technologies. This review examines recent instrumentation developments, the capabilities of the new instrumentation and discernable trends for future development.

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Environmental Radionuclides Measured By Ams

Stan-Sion¹,

Enăchescu²,

Dogaru³

New Techniques for the Detection of Nuclear and Radioactive Agents

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AMS at the National Institute of Nuclear Physics and Engineering in Bucharest

Cited by 9 publications

References 11 publications

¹⁴C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors

¹⁴C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors

Issues and opportunities in accelerator mass spectrometry for stable isotopes

Environmental Radionuclides Measured By Ams

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AMS at the National Institute of Nuclear Physics and Engineering in Bucharest

Cited by 9 publications

References 11 publications

14C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors

14C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors

Issues and opportunities in accelerator mass spectrometry for stable isotopes

Environmental Radionuclides Measured By Ams

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Product

Resources

About

¹⁴C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors

¹⁴C High Concentration Measurements with Relevance for Decommissioning of Nuclear Reactors