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Met de waanzin van het huidige nep kabinet vsn Schoof om ruzie te maken over die geitenhouders kun ja alleen maar hopen dat er heel erg snel een kabinet komt.
#nlpol
Atomic and molecular systems for radiation thermometry
Stephen P. Eckel, Eric B. Norrgard, Christopher Holloway, Nikunjkumar Prajapati, Noah Schlossberger, Matthew Simons
https://arxiv.org/abs/2512.08668 https://arxiv.org/pdf/2512.08668 https://arxiv.org/html/2512.08668
arXiv:2512.08668v1 Announce Type: new
Abstract: Atoms and simple molecules are excellent candidates for new standards and sensors because they are both all identical and their properties are determined by the immutable laws of quantum physics. Here, we introduce the concept of building a standard and sensor of radiative temperature using atoms and molecules. Such standards are based on precise measurement of the rate at which blackbody radiation (BBR) either excites or stimulates emission for a given atomic transition. We summarize the recent results of two experiments while detailing the rate equation models required for their interpretation. The cold atom thermometer (CAT) uses a gas of laser cooled $^{85}$Rb Rydberg atoms to probe the BBR spectrum near 130~GHz. This primary, {\it i.e.}, not traceable to a measurement of like kind, temperature measurement currently has a total uncertainty of approximately 1~\%, with clear paths toward improvement. The compact blackbody radiation atomic sensor (CoBRAS) uses a vapour of $^{85}$Rb and monitors fluorescence from states that are either populated by BBR or populated by spontaneous emission to measure the blackbody spectrum near 24.5~THz. The CoBRAS has an excellent relative precision of $u(T)\approx 0.13$~K, with a clear path toward implementing a primary
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"Nederland heeft 190.000 kilo goud liggen in de kluis van de Amerikaanse centrale bank in New York. En daar blijft het voorlopig. "We twijfelen niet aan de bestaande afspraken met de VS", zegt de DNB-woordvoerder. "
Hoe erg is je cognitieve dissonantie dan ?
Dat Trump en consorten ooit zullen toestaan dat we het terughalen?
Diesen Monat hat mich #NimbyRails sehr eingenommen: ich konnte nicht aufhören und habe inzwischen glatt das ganze SPNV-Netz von Dresden und Umgebung nachgebildet - einschießlich früherer Strecken und einiger Ergänzungen. :blobcatsalute: #Bahnverkehr
In #Waren entsteht ein #Solarpark mit 72.549 Modulen und 45 Megawatt Leistung.
Der symbolische #Spatenstich erfolgte verspätet. Der Bau war bereits weit fortgeschritten. 😊 Die Anlage ergänzt b…