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Article
Impact of Natural and Anthropogenic Factors on Late Holocene Sedimentation in the Chukchi Sea
Late Holocene sediments have been recovered in a core from the central Chukchi Sea to reconstruct their accumulation conditions. The sediments consist mainly of terrigenous and just partly of biogenic material...
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Article
Open AccessSearch for keV-scale sterile neutrinos with the first KATRIN data
In this work we present a keV-scale sterile-neutrino search with a low-tritium-activity data set of the KATRIN experiment, acquired in a commissioning run in 2018. KATRIN performs a spectroscopic measurement o...
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Article
Correction to: Certification of the First Uranium Oxide micro-particle reference materials for Nuclear Safety and Security, IRMM-2329P and IRMM-2331P
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Article
Certification of the First Uranium Oxide micro-particle reference materials for Nuclear Safety and Security, IRMM-2329P and IRMM-2331P
For nuclear safeguards purposes, two new uranium oxide micro-particle isotope reference materials were certified, IRMM-2329P and IRMM-2331P, with 235U enrichments of 3% and 5%, and 236U abundances of 30 µg·g1and ...
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Article
Composition of Late Holocene Deposits in the Southern Chukchi Sea
The objective of the work was a comprehensive study of Late Holocene bottom sediments from the southern Chukchi Sea and reconstruction of their accumulation conditions. Analytical methods included macroscopic ...
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Article
Open AccessPrecision measurement of the electron energy-loss function in tritium and deuterium gas for the KATRIN experiment
The KATRIN experiment is designed for a direct and model-independent determination of the effective electron anti-neutrino mass via a high-precision measurement of the tritium
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Article
Open AccessSuppression of Penning discharges between the KATRIN spectrometers
The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to determine the effective electron (anti)-neutrino mass with a sensitivity of 0.2eV/c
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Article
Open AccessGamma-induced background in the KATRIN main spectrometer
The KATRIN experiment aims to measure the effective electron antineutrino mass \(m_{\overline{\nu }_e}\)mν¯e with a sensitivity of \({0.2}\,{\hbox {eV}/\hbox {c}^2}\)0.2eV/c2 using a gaseous tritium source combin...
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Article
Open AccessReduction of stored-particle background by a magnetic pulse method at the KATRIN experiment
The KATRIN experiment aims to determine the effective electron neutrino mass with a sensitivity of \({0.2}{\hbox { eV/c}^{2}}\) ...
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Article
Open AccessCalibration of high voltages at the ppm level by the difference of \(^{83{\mathrm{m}}}\) Kr conversion electron lines at the KATRIN experiment
The neutrino mass experiment KATRIN requires a stability of 3 ppm for the retarding potential at − 18.6 kV of the main spectrometer. To monitor the stability, two custom-made ultra-precise high-voltage divider...
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Article
Isotopic composition of commercially available uranium chemicals and elemental analysis standards
Reference information on isotopic composition of various uranium materials, determined with high accuracy and precision, is of essential value for nuclear safeguards and nuclear forensics. In addition, an accu...
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Article
Reconstruction of the conditions of Late Holocene sedimentation by integrated analysis of a core of the bottom sediments from the Chukchi Sea
Integrated studies were performed on bottom sediments collected in the Chukchi Sea in the northern part of the Gerald Canyon 150 km northeast from Wrangel Island. The recent sedimentation rate amounted to 0.9 ...
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Article
Evaluation of chronometers in plutonium age determination for nuclear forensics: What if the ‘Pu/U clocks’ do not match?
This article discusses the age dating results of plutonium/uranium chronometers with a focus on the consequences for age plutonium determination when the basic assumptions of the methodology are not fully met:...
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Article
32Si dating of sediments from Lake Baikal
We applied the 32Si dating technique to a sediment core from Lake Baikal to obtain the sediment chronology for the last millennium. The core was recovered about 4 km offshore from the north slope of the South Bas...
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Article
A seasonal cycle of terrestrial inputs in Lake Van, Turkey
Lake Van in Turkey is the world's largest soda lake (607 km3). The lake's catchment area is estimated to be ∼12,500 km2, and the terrestrial input is carried through eolian, riverine, snowmelt and anthropogenic p...
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Chapter
Lethal Undiagnosed Very Long-Chain Acyl-CoA Dehydrogenase Deficiency with Mild C14-Acylcarnitine Abnormalities on Newborn Screening
Newborn screening identifies patients with very long-chain acyl-CoA dehydrogenase (VLCAD) deficiency with disease-specific acylcarnitine profiles. We here present a patient who died at 16 months during a gastr...
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Article
Monitoring of all hydrogen isotopologues at tritium laboratory Karlsruhe using Raman spectroscopy
We have recorded Raman spectra for all hydrogen isotopologues, using a CW Nd:YVO4 laser (5 W output power at 532 nm) and a high-throughput (f/1.8) spectrograph coupled to a Peltier-cooled (200 K) CCD-array detect...
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Article
Detektion von Monomerdämpfen beim Anmischen von PMMA-Knochenzement
Beim Anmischen von Polymethylmethacrylatknochenzement kommt es zur Exposition gegenüber toxischen Monomerdämpfen (Methylmethacrylat, MMA). Eine publizierte Studie konnte hierbei eine Reduktion der Monomerbelas...
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Chapter
Note Sur un Mémoire de M. Chasles
M. Chasles vient de publier, dans les Additions à la Connaissance des Temps pour 1845, de beaux théorèmes généraux sur l’attraction des corps, parmi lesquels se trouve celui qu’il avait communiqué à l’Académie de...
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Chapter
Mémoire sur la théorie de la vision
« Le mécanisme de la vision et les procédés que la nature emploie pour donner á l’œil la faculté de voir nettement les objets placés á différentes distances sont encore un sujet de controverse entre les physic...
