نتایج جستجو برای: water well

تعداد نتایج: 2000177  

2014
Neerav Kharche Seongmin Kim Timothy B. Boykin Gerhard Klimeck

1996
R. Ambigapathy I. Bar-Joseph D. Y. Oberli S. Haacke M. J. Brasil F. Reinhardt E. Kapon B. Deveaud

We have studied the luminescence of narrow quantum wires at photoexcitation densities of up to ∼ 3×10 cm. We show that, even at these densities, which are well above the expected Mott density of 8 × 10 cm, excitonic recombination dominates over other recombination channels in stark contrast with the behavior of quantum wells and bulk structures at equivalent densities. As we observe no shift in...

2017
T. Makino K. Tamura C. H. Chia Y. Segawa M. Kawasaki A. Ohtomo H. Koinuma

2001
R. L. Tober

The piezorefiectance technique has been used to optically characterize resonant tunneling structures that utilize isolated single quantum wells. The heavyand light-hole transitions associated with the quantum wells were prominent in the spectra of samples with barrier widths ranging from 50 to 34 A. Their spect.ral positions depended not only on quantum weB and barrier thicknesses, but also sig...

2016
M. K. Shakfa D. Kalincev X. Lu S. R. Johnson D. A. Beaton T. Tiedje A. Chernikov S. Chatterjee M. Koch

2011
Yuki Tosaki Norio Tase Akihiko Kondoh Kimikazu Sasa Tsutomu Takahashi Yasuo Nagashima

This study investigates the potential of Cl in tracing young groundwater with residence times of up to ~50 years. Groundwater samples were obtained from 16 irrigation wells in paddy fields located within an upland–lowland system in the Yoro River basin, Central Japan. The Cl/Cl ratios were in the range of 17 to 362  10. Among the samples with higher Cl concentrations (>10 mg/L), two samples sh...

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