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31.
Michael Cargnelli M. Bazzi G. Beer C. Berucci L. Bombelli A. M. Bragadireanu A. Clozza G. Corradi C. Curceanu A. d’Uffizi C. Fiorini F. Ghio B. Girolami C. Guaraldo R. S. Hayano M. Iliescu T. Ishiwatari M. Iwasaki P. Kienle P. Levi Sandri V. Lucherini J. Marton S. Okada D. Pietreanu K. Piscicchia M. Poli Lener T. Ponta R. Quaglia A. Rizzo A. Romero Vidal E. Sbardella A. Scordo H. Shi D. L. Sirghi F. Sirghi H. Tatsuno A. Tudorache V. Tudorache O. Vazquez Doce E. Widmann J. Zmeskal 《Hyperfine Interactions》2012,209(1-3):121-126
The $\overline{K}N$ system at rest plays a key role for the understanding of strong interaction of hadrons with strangeness involved. The experiment SIDDHARTA used X-ray spectroscopy of kaonic atoms to measure the strong interaction induced shift and width of the ground state. It was the first experiment on kaonic He3 and deuterium ever, kaonic hydrogen was measured with improved precision resulting in $\epsilon_{1s} = -283 \pm 36 \mbox{(stat)} \pm 6 \mbox{(syst)}$ eV and $\Gamma_{1s} = 541 \pm 89 \mbox{(stat)} \pm 22 \mbox{(syst)}$ eV. Additionally a scheme for an improved future experiment on kaonic deuterium is introduced in this contribution. 相似文献
32.
Hori M Dax A Eades J Gomikawa K Hayano RS Ono N Pirkl W Widmann E Torii HA Juhász B Barna D Horváth D 《Physical review letters》2006,96(24):243401
A femtosecond optical frequency comb and continuous-wave pulse-amplified laser were used to measure 12 transition frequencies of antiprotonic helium to fractional precisions of (9-16)x10(-9). One of these is between two states having microsecond-scale lifetimes hitherto unaccessible to our precision laser spectroscopy method. Comparisons with three-body QED calculations yielded an antiproton-to-electron mass ratio of Mp/me=1836.152674(5). 相似文献
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34.
Hideki Kubo Shigetaka Hayano Toshio Masuda 《Journal of polymer science. Part A, Polymer chemistry》2000,38(15):2697-2701
The polymerization of aliphatic disubstituted acetylenes was examined with MoOCl4–n‐Bu4Sn–EtOH (1/1/2) ternary catalyst in anisole at 0 °C. Various linear aliphatic disubstituted acetylenes such as 2‐nonyne provided polymers with narrow molecular weight distributions (weight‐average molecular weight/number‐average molecular weight = 1.05–1.20). The living character of the polymerization was proven by both the time profile of the polymerization and the multistage polymerization of 2‐nonyne. The initiation efficiency was about 3%, which is rather low. Although 5‐dodecyne, which has a triple bond in a more inner part, polymerized more slowly than 2‐nonyne, their living characters were hardly different. Diblock copolymers were synthesized by the sequential living polymerization of internal linear alkynes. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 2697–2701, 2000 相似文献
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Hori M Eades J Hayano RS Pirkl W Widmann E Yamaguchi H Torii HA Juhász B Horváth D Suzuki K Yamazaki T 《Physical review letters》2005,94(6):063401
Cold, two-body antiprotonic helium ions p 4He2+ and p 3He2+ with 100-ns-scale lifetimes, occupying circular states with the quantum numbers ni=28-32 and li=ni-1 have been observed. They were produced by cooling three-body antiprotonic helium atoms in an ultra-low-density helium target at temperature T approximately 10 K by atomic collisions, and then removing their electrons by inducing a laser transition to an autoionizing state. The lifetimes of p 3He2+ against annihilation induced by collisions were shorter than those of p 4He2+, and decreased for larger-ni states. 相似文献
37.
Madsen N Amoretti M Amsler C Bonomi G Bowe PD Carraro C Cesar CL Charlton M Doser M Fontana A Fujiwara MC Funakoshi R Genova P Hangst JS Hayano RS Jørgensen LV Kellerbauer A Lagomarsino V Landua R Lodi-Rizzini E Macri M Mitchard D Montagna P Pruys H Regenfus C Rotondi A Testera G Variola A Venturelli L van der Werf DP Yamazaki Y Zurlo N;ATHENA Collaboration 《Physical review letters》2005,94(3):033403
Antihydrogen is formed when antiprotons are mixed with cold positrons in a nested Penning trap. We present experimental evidence, obtained using our antihydrogen annihilation detector, that the spatial distribution of the emerging antihydrogen atoms is independent of the positron temperature and axially enhanced. This indicates that antihydrogen is formed before the antiprotons are in thermal equilibrium with the positron plasma. This result has important implications for the trapping and spectroscopy of antihydrogen. 相似文献
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39.
Yoshio Iwakura Keisuke Kurita Fusakazu Hayano 《Journal of polymer science. Part A, Polymer chemistry》1969,7(11):3075-3087
Polythioureas having pendant hydroxyl groups were prepared by the polyaddition reaction of bisaminoalcohols and diisothiocyanates. The polythioureas had inherent viscosities in the range of 0.22–1.08 dl/g and gave transparent films by solution casting. These polythioureas were converted to polythiazolines by treatment with poly(phosphoric acid) or to poly(thiazoline–oxazolines) by treatment with a mixture of poly(phosphoric acid) and a polar solvent. 相似文献
40.
Yoshio Iwakura Aiko Nabeya Fusakazu Hayano Keisuke Kurita 《Journal of polymer science. Part A, Polymer chemistry》1967,5(8):1865-1880
Polyurethans with chloromethyl side chains were prepared by the polyaddition reaction of bischlorohydrins and diisocyanates. The polyurethans had inherent viscosities in a range of 0.22–0.60 and gave transparent films by solution casting. These polyurethans were easily converted to the polyoxazolidones by treatment with sodium methoxide. The polyoxazolidones had inherent viscosities up to 0.51, and gave transparent films by solution casting. 相似文献