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- Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
- Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
- Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
- Tokyo Sugaku-Butsurigakkwai Hokoku
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Volume 52, Issue 12
Displaying 51-55 of 55 articles from this issue
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Hisashi Takenaka, Koichi Kobayashi, Ken Takiyama, Jun’ichir\={o} ...1983Volume 52Issue 12 Pages 4377-4384
Published: December 15, 1983
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSResonance behavior of the Raman scattering is investigated for 1LO(Γ) and 2LO(Γ) lines in the energy range of the X6+×X6− direct exciton in TlCl. It is found that the exciton plus photon picture is better than the polariton picture in describing the dependence of the Raman intensity on the incident photon energy. This suggests that a usual polariton scheme seems to be no more adequate to represent the photo-excited state in TlCl and its origin is discussed. A weak resonance behavior of 2LO(Γ) scattering is found in the energy range of the X6+×R6− phonon-forbidden indirect exciton absorption edge.View full abstractDownload PDF (1108K) -
Yoshio Kaneko, Koichi Morimoto, Takao Koda1983Volume 52Issue 12 Pages 4385-4396
Published: December 15, 1983
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe reflectivity spectra have been measured on single crystals of CaO, CaS, SrO, SrS, SrSe, BaO, BaS and BaSe in the syncrotron radiation region of 4–40 eV. In order to prevent surface deterioration effect, all measurements have been made at 77 K on the fresh (100) surfaces cleaved within a high vacuum. From a chemical trend of the spectra, the observed spectral features are classified into two groups, the interband and band-exciton transitions in the lower energy region, and the core-excitons in the higher energy region. The structures of the former group are interpreted in terms of a band-structure model which predicts the smallest direct gap at the X-point. For the features of the latter group, the ligand-field model by Satoko and Sugano gives a successful account of the observed core-exciton multiplets.View full abstractDownload PDF (1520K) -
Mihiro Yanagihara, Yasuhiro Kondo, Hiroshi Kanzaki1983Volume 52Issue 12 Pages 4397-4406
Published: December 15, 1983
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSExcitation spectra of luminescence quantum yield in alkali and silver halides are measured at low temperatures using synchrotron radiation for the energy range up to 30 eV. The yields at the valence exciton excitation are low (0.1 at most) in alkali halides (KCl, KBr and NaBr), but high (0.4) in AgCl. Enhancement of the yield indicative of multiple exciton production is observed at higher energies, and the yields in NaBr and AgCl exceed unity in the energy range studied. Discussion is given for the competition between radiative and non-radiative decay channels during relaxation of excited states.View full abstractDownload PDF (1220K) -
Shoji Ihara, Tatsuo Ooi1983Volume 52Issue 12 Pages 4407-4416
Published: December 15, 1983
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSConformational energies of native ribonuclease A were computed in the multi-dimensional space of dihedral angles of the backbone and side chains. By minimization of the total energy starting from three sets of the angles, we obtained three low energy conformations, C1, C2 and C3, which have almost the same energy, −644±4 kcal/mol and are close to the experimental structure. In the neighborhood of C1, we found a smooth energy surface with ellipsoidal energy contours. C1, C2 and C3 were mutually related with low energy paths in the conformational space. The results indicate that the protein molecule has flexibility inside the molecule which arises from the highly cooperative motion of the constituent atoms. The low energy conformations found in this study account for the characteristic features experimentally obtained.View full abstractDownload PDF (1376K) -
Akiyoshi Wada, Akira Suyama1983Volume 52Issue 12 Pages 4417-4422
Published: December 15, 1983
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSSeveral facts showing that stability heterogeneity along DNA double-strand has a remarkable positional correlation with the distribution of genes are presented. The distribution of physical stability of the double-helix seems to play some role in the genetic function of DNA, and/or may be a relic of the past recombination. In any case, the authors would like to suggest that the full understanding of the genetic function of DNA may not be achieved without a detailed study of ‘physical property map’ along its long molecular thread.View full abstractDownload PDF (648K)