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101.
One-step access to (1-iodovinyl) arenes from trimethylsilyl ethynylarenes is described. The method is superior to a conventional multi-step approach, and is enhanced by the Sonogashira reaction that provides ready access to a variety of trimethylsilyl ethynylarenes. 相似文献
102.
103.
ZHENG Yong-Nan ZHOU Dong-Mei K. Matsuta M. Mihara M. Fukuda D. Nishimura J. Komurasaki D. Ishikawa R. Matsumiya T. Nagatomo T. Izumikawa S. Takahashi H. Hirano T. Ohtsubo S. Momota Y. Nojiri A. Kitagawa M. Kanazawa M. Torikoshi S. Sato T. Minamisono J.R. Alonso G.F. Krebs T. J. M. Symons YUAN Da-Qing ZUO Yi FAN Ping T. Suzuki ZHANG Xi-Zhen ZHU Sheng-Yun 《中国物理C(英文版)》2009,33(Z1)
Nuclear structure of proton-rich unstable nucleus 28P has been studied by measuring its g-factor for the first time. The g-factor of 28P (Iπ =3+, T1/2=270.3 ms) was measured by means of β-NMR technique combined with the new polarization technique for charge exchange reaction product in the intermediate energy heavy ion collisions. The obtained g-factor of g=0.1028(27) is very much quenched from the Schmidt value,but is well reproduced by the shell model (+0.102). In connection with the magnetic moment of the mirror partner and the β-ray transition probability, the orbital angular momenta and intrinsic spins of protons and neutrons have been determined as 〈lp〉 = 0.43(29), 〈ln〉 = 1.85(29), 〈Sp〉 = 0.28(4), and 〈Sn〉 = 0.44(4). 相似文献
104.
105.
Matsuta K Miyake T Minamisono K Morishita A Momota S Nojiri Y Mihara M Fukuda M Sato K Zhu SY Kitagawa H Sagawa H Minamisono T 《Physical review letters》2001,86(17):3735-3738
The nuclear magnetic dipole moment mu and electric quadrupole moment Q of the beta-emitting 16N(Ipi = 2(-), T(1/2) = 7.13 s) nucleus have been determined for the first time by detecting its beta-NMR in a MgO crystal and beta-NQR (nuclear quadrupole resonance) in a TiO (2) crystal to be /mu/ = (1.9859+/-0.0011) mu(N) and /Q/ = (17.9+/-1.7) mb, respectively. Although the prediction of mu given by the Hartree-Fock calculation agrees well with the experiment, an abnormally small effective charge for neutrons is required to account for the experimental Q. 相似文献
106.
107.
Matsuda K Saiki T Nomura S Mihara M Aoyagi Y Nair S Takagahara T 《Physical review letters》2003,91(17):177401
Near-field photoluminescence imaging spectroscopy of naturally occurring GaAs quantum dots (QDs) is presented. We successfully mapped out center-of -mass wave functions of an exciton confined in a GaAs QD in real space due to the enhancement of spatial resolution up to 30 nm. As a consequence, we discovered that the spatial profile of the exciton emission, which reflects the shape of a monolayer-high island, differs from that of biexciton emission, due to different distributions of the polarization field for the exciton and biexciton recombinations. This novel technique can be extensively applied to wave function engineering in the design and the fabrication of quantum devices. 相似文献
108.
Energetic protons from a few-micron metallic foil evaporated by an intense laser pulse 总被引:1,自引:0,他引:1
Matsukado K Esirkepov T Kinoshita K Daido H Utsumi T Li Z Fukumi A Hayashi Y Orimo S Nishiuchi M Bulanov SV Tajima T Noda A Iwashita Y Shirai T Takeuchi T Nakamura S Yamazaki A Ikegami M Mihara T Morita A Uesaka M Yoshii K Watanabe T Hosokai T Zhidkov A Ogata A Wada Y Kubota T 《Physical review letters》2003,91(21):215001
With detailed experimental studies and hydrodynamics and particle-in-cell simulations we investigate the role of the prepulse in laser proton acceleration. The prepulse or pedestal (amplified spontaneous emission) can completely evaporate the irradiated region of a sufficiently thin foil; therefore, the main part of the laser pulse interacts with an underdense plasma. The multiparametric particle-in-cell simulations demonstrate that the main pulse generates the quasistatic magnetic field, which in its turn produces the long-lived charge separation electrostatic field, accelerating the ions. 相似文献
109.
The study of charmonium dissociation in heavy ion collisions is generally performed in the framework of effective Lagrangians with meson exchange. Some studies are also developed with the intention of calculate form factors and coupling constants related with charmed and light mesons. These quantities are important in the evaluation of charmonium cross sections. In this Letter we present a calculation of the ωDD vertex that is a possible interaction vertex in some meson-exchange models spread in the literature. We used the standard method of QCD sum rules in order to obtain the vertex form factor as a function of the transferred momentum. Our results are compatible with the value of this vertex form factor (at zero momentum transfer) obtained in the vector-meson dominance model. 相似文献
110.
T. Nagatomo K. Matsuta K. Minamisono T. Sumikama M. Mihara A. Ozawa Y. Tagishi M. Ogura R. Matsumiya M. Fukuda M. Yamaguchi T. Yasuno H. Ohta Y. Hashizume H. Fujiwara A. Chiba T. Minamisono 《Hyperfine Interactions》2007,180(1-3):75-78
The alignment correlation term in the β-ray angular distribution from purely nuclear spin aligned 20F has been measured to test the G-parity conservation law which is one of the fundamental symmetries in the weak nucleon current. We utilized the hyperfine interaction of 20F in an MgF2 single crystal and successfully created the pure alignment from the polarization by means of the spin manipulation technique based on the β-NMR method. 相似文献