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The lasers needed for the magneto-optical trapping of rubidium 85: (a) & (b) show the absorption (red detuned to the dotted line) and spontaneous emission cycle, (c) & (d) are forbidden transitions, (e) shows that if the cooling laser excites an atom to the = state, it is allowed to decay to the "dark" lower hyperfine, F=2 state, which would ...
Following on where the F.3 left off, the F.5 was a version of the F.2/4 with an open rotor (unducted) thrust augmenter added to the end of the jet pipe, somewhat remote from the HP turbine The 5 ft 6 in diameter fixed pitch propellers, which contra-rotated, were driven by a four-stage statorless LP turbine unit, similar to that of the F.3 ...
Henri Moissan's 1892 record of fluorine gas color, viewed end-on in a 5‑m tube. Air (1) is on the left, fluorine (2) is in the middle, chlorine (3) is on the right. Fluorine forms diatomic molecules (F 2) that are gaseous at room temperature with a density about 1.3 times that of air.
The F-gas Regulation adopts an approach based on containment and recovery of F-gases as well as imposing obligations on reporting, training and labeling on those using F-gases. On 26 September 2011, the Commission issued a report on the application, effects and adequacy of the Regulation, drawing from the results of an analytical study it ...
A Florida IHOP employee who was fired after serving a homeless man said she was offered her job back, according to local media. Victoria Hughes has worked at an IHOP restaurant in Lakeland, Fla ...
2 KMnO 4 + 2 KF + 10 HF + 3 H 2 O 2 → 2 K 2 MnF 6 + 8 H 2 O + 3 O 2 ↑ 2 K 2 MnF 6 + 4 SbF 5 → 4 KSbF 6 + 2 MnF 3 + F 2 ↑. Christe later commented that the reactants "had been known for more than 100 years and even Moissan could have come up with this scheme." [178] As late as 2008, some references still asserted that fluorine was too ...
Days before he retires as chairman of the influential U.S. Senate Foreign Relations Committee, Democrat Ben Cardin acknowledged worries about human rights being less of a U.S. priority during ...
Macy's CEO Tony Spring took the helm Feb. 4 and then later that month he announced a plan to close 150 stores. It also announced plans to upgrade 350 stores, with plans to add more salespeople to ...