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排序方式: 共有595条查询结果,搜索用时 15 毫秒
591.
592.
A. Okada K. Mitsui T. Kitamura Y. Ohashi Y. Muraki T. Suda I. Nakamura Y. Kawashima S. Matsuno F. Kajino T. Aoki S. Higashi S. Ozaki T. Takahashi K. Honda K. Kobayakawa H. Inazawa Y. Minorikawa M. Shibata H. Shibata Y. Kamiya Y. Teramoto 《Fortschritte der Physik》1984,32(4):135-173
Hadronic cascade showers originating from inelastic interactions of cosmic ray muons with iron nuclei have been observed in a calorimeter located between two magnetic spectrometers. The separation of those events from the electromagnetic showers has been successfully done in the ranges of the transferred energy v ≳ 50 GeV and its ratio to muon energy v/E ≳ 0,1, by utilizing the difference of their longitudinal cascade developments. The comparison of the obtained μ-Fe cross section with available μ-, e- and σ-proton data as well as μ-, e- and σ-nucleus data indicates that;
- 1 At v ˜ 100 GeV, the virtual photon cross section on iron nucleus is almost the same as the real photon one, at least Q2 ≳ 0.1 GeV2/c2, and is about 70% of the cross section on proton times the atomic mass number of iron, i.e. the shadowing effect is clearly seen.
- 2 Up to TeV region, this virtual photon cross section on iron does not increase significantly. contrary to the tendency of the real photon cross section on proton around 100 GeV. This suggests most likely that the shadowing still increases with energy at such high energies.
593.
Akira Tsuchida Yuji Ohi Shinya Takahashi Hiroshi Kimura Tsuneo Okubo 《Macromolecular Symposia》2010,288(1):87-94
Summary: The efficiency of electronic excitation energy transfer from photoexcited fluorescein to rhodamine 6G is enhanced by 2.26 times in an exhaustively deionized colloidal silica suspension. This enhancement is caused by the photon trapping effects due to the Bragg reflection of colloidal crystals formed in the suspension. The lower enhancement efficiency of 1.41 times observed for rhodamine B as an acceptor is attributed to the inefficient spectral overlap between donor fluorescence and acceptor absorption bands. 相似文献
594.
Tsuneo Imamoto Takeshi Yoshizawa Koutaro Hirose Yoshiyuki Wada Hideki Masuda Kentaro Yamaguchi Hiroko Seki 《Heteroatom Chemistry》1995,6(2):99-104
(SP)-9-Anthryl(l-menthyloxy)phenylphosphine-borane and (SP)-(1-l-menthyloxy)benzo[b]phosphole-borane were synthesized, and their structures were characterized by X-ray crystallographic analysis. The latter compound was reduced by lithium naphthalenide at −78°C with cleavage of the P O bond, and the subsequent reaction with electrophiles afforded the corresponding tertiary phosphine-boranes possessing good to excellent enantiomeric excesses. 相似文献
595.
Tsuneo Hagiwara 《Macromolecular Symposia》2001,175(1):397-402
A main goal for manufacturing systems is to shorten lead‐time for the development of new products. An important challenge is to make sound decisions at early stages of product development where committed costs are low which leads us to obtain a lower total cost. This could mean that incurred costs are higher in the beginning where more work has to be done in terms of learning the market, developing the product and the production system. An important feature is to avoid changes at later stages where the incurred costs are high. The stereolithography using photo curable liquid resin is important for the manufacturing. The technology based on the stereolithography has been widely accepted due to the phenomena of spreading “Information Technology (IT)” and three‐dimensional computer aided design (3D CAD) system. The stereolithography technique has become very popular in the field of automotive, home‐electronics industries. In this paper the photo curable liquid resins for the stereolithography system are reviewed. 相似文献