5,668 research outputs found
Routine Method of 77Kr Production
開始ページ、終了ページ: 冊子体のページ付
The Synthesis of o- and p-[18F]Fluorobenzyl Bromides and Their Application to the Preparation of Labeled Neuroleptics
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Precise study of asymptotic physics with subradiant ultracold molecules
Weakly bound molecules have physical properties without atomic analogues,
even as the bond length approaches dissociation. In particular, the internal
symmetries of homonuclear diatomic molecules result in formation of two-body
superradiant and subradiant excited states. While superradiance has been
demonstrated in a variety of systems, subradiance is more elusive due to the
inherently weak interaction with the environment. Here we characterize the
properties of deeply subradiant molecular states with intrinsic quality factors
exceeding via precise optical spectroscopy with the longest
molecule-light coherent interaction times to date. We find that two competing
effects limit the lifetimes of the subradiant molecules, with different
asymptotic behaviors. The first is radiative decay via weak magnetic-dipole and
electric-quadrupole interactions. We prove that its rate increases
quadratically with the bond length, confirming quantum mechanical predictions.
The second is nonradiative decay through weak gyroscopic predissociation, with
a rate proportional to the vibrational mode spacing and sensitive to
short-range physics. This work bridges the gap between atomic and molecular
metrology based on lattice-clock techniques, yielding new understanding of
long-range interatomic interactions and placing ultracold molecules at the
forefront of precision measurements.Comment: 12 pages, 6 figure
Radiosynthesis of 1-[2-[18F]Fluoro-1-(hydroxymethyl)-Ethoxy]methyl-2-Nitroimidazole([18F]FENI)
開始ページ、終了ページ: 冊子体のページ付
Metabolism of Vanadiuim-48 in Mice
開始ページ、終了ページ: 冊子体のページ付
Automated Synthesis of [18F]-Methyl Fluoride
開始ページ、終了ページ: 冊子体のページ付
Tumor Uptake Studies of S-Adenosyl-L-[methyl-11C]Methionine and L-[methyl-11C]Methionine
開始ページ、終了ページ: 冊子体のページ付
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