منابع مشابه
Cavity ring down dye laser spectroscopy of jet-cooled metal clusters: Cu2 and Cq
Direct optical absorption measurements ofjet-cooled metal clusters formed in a pulsed molecular beam have been made using a sensitive new absorption technique employing pulsed laser sources. Metal clusters and other metal containing species have been observed in this initial study. Absorption measurements of the Cu, ‘A;-‘E’ system reveal strong intensities for vibronic bands seen only weakly in...
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متن کاملCryogenically cooled 946nm Nd:YAG laser.
We present the first multi-Watt demonstration of a diode pumped cryogenically cooled neodymium-doped yttrium aluminum garnet (YAG) laser operating at 946 nm on the (4)F(3/2) → (4)I(9/2) transition. 3.8 W of continuous wave output power for 12.8 W of absorbed pump was obtained with a slope efficiency of 47%. In addition, we made an extensive characterization of the spectroscopic properties aroun...
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We present results on trapping and cooling of positrons in a Penning trap. Positrons from a 2 mCi Na source travel along the axis of a 6 T magnet and through the trap after which they strike a Cu reflection moderator crystal. Up to a few thousand positrons are trapped and lose energy through Coulomb collisions (sympathetic cooling) with laser-cooled Be. By imaging the Be laser-induced fluoresce...
متن کاملCold electron sources using laser-cooled atoms
Since the first observation of electron diffraction in 1927, electrons have been used to probe the structure of matter. High-brightness sources of thermal electrons have recently emerged that are capable of simultaneously providing high spatial resolving power along with ultrafast temporal resolution, however they are yet to demonstrate the holy grail of singleshot diffraction of non-crystallin...
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ژورنال
عنوان ژورنال: Zeitschrift für Naturforschung A
سال: 1975
ISSN: 1865-7109,0932-0784
DOI: 10.1515/zna-1975-0505