نتایج جستجو برای: peak detector
تعداد نتایج: 198135 فیلتر نتایج به سال:
The mid-infrared transmission through a 3.7 mm period, twodimensional sub-wavelength Au metallic hole array integrated on a GaSb/InAs strained layer superlattice nBn photodetector is measured. The surface plasmon-polariton excitation on the Au film induces a peak transmission in the 200 K detector response at 4.2 mm. This transmission is enhanced threefold by the insertion of a SiNx layer betwe...
The effect of detector array size on resolution and signal collection efficiency of image scanning microscopy based on pixel reassignment is studied. It is shown how the method can also be employed if there is a Stokes shift in fluorescence emission wavelength. With no Stokes shift, the width of the point spread function can be sharpened by a factor of 1.53, and its peak intensity increased by ...
We present a study of the reaction e+e−→π+π−γ at the φ peak with the KLOE detector at the φ–factory DAΦNE. This reaction allows us to obtain the cross section for e+e−→π+π− from the ee center-of-mass energy W = mφ = 1019 MeV down to threshold, i.e.2mπ < Mππ < mφ. This is called radiative return. The status of the analysis and preliminary results on the invariant mass spectrum of the two-pion-st...
We report on preliminary results of searches for penguin mediated B decays based on 20.7 fb −1 of data collected at the Υ (4S) peak with the BABAR detector at PEP-II. The following branching fractions have been measured: B(B + → φK +) = (7.7 −5.6 ± 1.7) × 10 −6 , where the first error is statistical and the second systematic. For several other modes we report upper limits on their branching fra...
We report on preliminary results of searches for penguin mediated B decays based on 20.7 fb −1 of data collected at the Υ (4S) peak with the BABAR detector at PEP-II. The following branching fractions have been measured: B(B + → φK +) = (7.7 −5.6 ± 1.7) × 10 −6 , where the first error is statistical and the second systematic. For several other modes we report upper limits on their branching fra...
We have studied the leptonic decay D+ s → τ ντ , via the decay channel τ + → eνeν̄τ , using a sample of tagged D+ s decays collected near the D ∗± s D ∓ s peak production energy in e +e− collisions with the CLEO-c detector. We obtain B(D+ s → τ ντ ) = (5.30± 0.47± 0.22)% and determine the decay constant fDs = (252.5±11.1±5.2) MeV, where the first uncertainties are statistical and the second are ...
for better management of asthma it is essential that patients adjust their treatment according to the medical plan developed by the health care professionals. to achieve this goal, patients should assess the severity of their disease regularly. the purpose of this study was to determine the effect of regular measurement of peak expiratory flow and patient education on self management of asthma....
GEO 600 is a dual-recycled interferometric gravitational wave detector which uses advanced optical techniques to achieve its design sensitivity. The peak response of GEO is tunable over a range of frequencies within the detection band of the instrument. The accurate calibration of the detector is an essential step in preparing the data for distribution to the various analysis groups in the comm...
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