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Volume 59, Issue 5
Displaying 1-29 of 29 articles from this issue
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Article type: Cover
2004 Volume 59 Issue 5 Pages Cover1-
Published: May 05, 2004
Released on J-STAGE: February 15, 2019
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Article type: Index
2004 Volume 59 Issue 5 Pages Toc1-
Published: May 05, 2004
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Article type: Index
2004 Volume 59 Issue 5 Pages Toc3-
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Koji KajitaArticle type: Article
2004 Volume 59 Issue 5 Pages 283-
Published: May 05, 2004
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Ken-ichi KuboArticle type: Article
2004 Volume 59 Issue 5 Pages 284-
Published: May 05, 2004
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Yasuhiko FujiiArticle type: Article
2004 Volume 59 Issue 5 Pages 285-
Published: May 05, 2004
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Akio Hosoya2004 Volume 59 Issue 5 Pages 286-290
Published: 2004
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSIt is known that there is a complete paralellism between black hole physics and thermodynamics. We present a simple proof of the generalized second law, I.e. the sum of the intrinsic black hole entropy and ordinary thermodynamical entropy always increases. We also show that the increase of the total entropy exceeds the amount of knowledge obtained by quantum operations outside the black hole.View full abstractDownload PDF (761K) -
Yasuyuki Akiba, Hideki Hamagaki2004 Volume 59 Issue 5 Pages 291-299
Published: May 05, 2004
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSWe review what we have learned from the first three years of RHIC, the world highest energy nucleus-nucleus collider. The main goal of RHIC is to create a new state of matter made of deconfined quarks and gluons, the quark gluon plasma (QGP), by colliding heavy nuclei at extremely high energy. The suppression of high pT particles and away-side jets in central Au+Au collisions and the absence of such suppression effects in d+Au collisions have established that a very dense matter is formed in collisions of heavy nuclei at RHIC. The strong elliptic flow observed in non-central Au+Au collision is a strong evidence for a rapid thermalization of the matter. The hadron yield ratios and the pT distributions of hadrons are consistent with the models that the system is in local thermal equilibrium at the end of reaction. The measurement of open charm production and J/Ψ particle has started. They are important probes to further investigate the nature of the dense matter formed at RHIC.View full abstractDownload PDF (1361K) -
Yasuhiro Masuda2004 Volume 59 Issue 5 Pages 300-307
Published: May 05, 2004
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSA neutron wave is confined in a material bottle at very low energy, although the size of the neutron is very small compared with the interatomic distance in the material. The nuclear force becomes repulsive for long wave neutrons as a result of a quantum effect on the surface of the nucleus. Because of this effect, neutrons with energies below critical energy, which are defined as ultracold neutrons (UCN), are completely reflected upon collision with a material surface and then confined in a material bottle. Confined neutrons can be used for precision experiments on the space and time reversal, neutron lifetime, n-nbar oscillation and gravity. High UCN density is highly desirable for development of these experiments. A new generation UCN source was established for innovation in UCN density. The UCN production and physics of UCN are discussed.View full abstractDownload PDF (1324K) -
Yasuo Fukui2004 Volume 59 Issue 5 Pages 308-311
Published: May 05, 2004
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSSupernova remnants are believed to be major sites of acceleration of Galactic cosmic rays. In particular, it has been a big issue whether supernova remnants are sites of proton acceleration or not. We carried out extensive CO observations covering the whole southern Galactic plane and discovered molecular clouds at a distance of 1 kpc interacting with the TeV gamma-ray SNR G347.3-0.5. A good spatial coincidence between these molecular gas and nonthermal X-ray or TeV-gamma ray distributions indicates a possibility that the interaction of the supernova remnant with the molecular gas is the origin of cosmicray proton acceleration.View full abstractDownload PDF (1134K) -
X-Ray Induced Structural Change and Electrical Conduction in Spinel Compound CuIr2S4(Current Topics)Hiroki Ishibashi2004 Volume 59 Issue 5 Pages 312-315
Published: May 05, 2004
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSA spinel compound CuIr2S4 shows a metal-insulator transition accompanied by a structural transition at 230K and becomes an insulator with a triclinic structure below the transition temperature. This is due to a simultaneous charge ordering of Ir3+ and Ir4+ and spin-dimerization of Ir4+. We found that X-ray irradiation induces a structural change from triclinic to tetragonal below ∼50K and reduces the electrical resistivity by at least three orders magnitude.View full abstractDownload PDF (829K) -
Hiroshi KonnoArticle type: Article
2004 Volume 59 Issue 5 Pages 316-317
Published: May 05, 2004
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Hiroshi EzawaArticle type: Article
2004 Volume 59 Issue 5 Pages 317-318
Published: May 05, 2004
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[in Japanese]Article type: Article
2004 Volume 59 Issue 5 Pages 319-
Published: May 05, 2004
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[in Japanese]Article type: Article
2004 Volume 59 Issue 5 Pages 319-320
Published: May 05, 2004
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[in Japanese]Article type: Article
2004 Volume 59 Issue 5 Pages 320-
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[in Japanese]Article type: Article
2004 Volume 59 Issue 5 Pages 320-321
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 321-
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 322-
Published: May 05, 2004
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[in Japanese]Article type: Article
2004 Volume 59 Issue 5 Pages 322-
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 323-327
Published: May 05, 2004
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 327-331
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 331-332
Published: May 05, 2004
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 333-334
Published: May 05, 2004
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 334-335
Published: May 05, 2004
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 335-
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 336-340
Published: May 05, 2004
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 340-341
Published: May 05, 2004
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Article type: Appendix
2004 Volume 59 Issue 5 Pages 342-346
Published: May 05, 2004
Released on J-STAGE: February 15, 2019
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