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Article type: Cover
2005 Volume 60 Issue 9 Pages
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Published: September 05, 2005
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Article type: Index
2005 Volume 60 Issue 9 Pages
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Article type: Index
2005 Volume 60 Issue 9 Pages
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Kazuo Kitahara
Article type: Article
2005 Volume 60 Issue 9 Pages
685-
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Kazuo Kitahara, Masatoshi Namiki
Article type: Article
2005 Volume 60 Issue 9 Pages
686-
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Tetsuro Kobayashi
Article type: Article
2005 Volume 60 Issue 9 Pages
687-
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Eiichi Hanamura
2005 Volume 60 Issue 9 Pages
688-696
Published: September 05, 2005
Released on J-STAGE: April 14, 2008
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A 100-year history of physics on radiation field and its interaction with materials is described with emphasis on the activities of Japanese physicists and the fields triggered by Einstein. This is celebrating the centennial of 1905 miracle by Einstein. Particle-wave duality of radiation field, laser, entanglement and its application to quantum-teleportation, and Bose-Einstein condensation of atoms are discussed.
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Tomohiro Uesaka
Article type: Article
2005 Volume 60 Issue 9 Pages
697-
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Kosuke Morita
2005 Volume 60 Issue 9 Pages
698-707
Published: September 05, 2005
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The convincing candidate event of the isotope of the 113th element,
278113, and its daughter nuclei,
274111 and
271Mt, were observed, for the first time, in the
209Bi+
70Zn reaction. The experiment was performed at RIKEN (The Institute of Physical and Chemical Research) Linear Accelerator Facility using a GAs-filled Recoil Ion Separator GARIS. The experiments to confirm the productions and decays of isotopes
265Hs(Z=108),
271Ds(Z=110),
272Rg(Z=111), and
277112(Z=112) were also done.
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Yuichiro Nagame, Hiromichi Nakahara
2005 Volume 60 Issue 9 Pages
707-709
Published: September 05, 2005
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Atsushi Shinohara, Kazuaki Tsukada, Yuichiro Nagame
2005 Volume 60 Issue 9 Pages
709-716
Published: September 05, 2005
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Heavy elements beyond mendelevium (
101Md) are usually available in quantities of only a few atoms at a time for experiments, and so studies on their chemical properties have to be performed based on the single atom chemistry with an accelerator online experiment. Therefore, chemical properties of the so-called superheavy elements are little known and remain to be further investigated. The synthesis of Element 113 in RIKEN demonstrates that full studies of superheavy elements are indeed underway in Japan. Recently we found some new chemical properties of rutherfordium (
104Rf) at JAERI. Here we have briefly demonstrated the fascinating studies involved in probing the structure of the periodic table at its uppermost end, where relativistic effects drastically influence chemical properties. As well, the present status of chemical studies on superheavy elements in Japan is reviewed, and some research plans for the near future are briefly discussed.
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Hiroyuki Koura, Takahiro Tachibana
2005 Volume 60 Issue 9 Pages
717-724
Published: September 05, 2005
Released on J-STAGE: April 14, 2008
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Nuclear decay modes for heavy and superheavy nuclei are discussed with the use of a nuclear mass formula and some decay models. This mass formula, which we refer to as the KTUY formula, is composed of a gross part expressed as a smooth function of proton number and neutron number and a shell part calculated from single-particle potentials. On estimations of decay modes excluding spontaneous-fission, we use Q-values of the KTUY mass formula. The spontaneous fission half-lives are estimated from penetrability on a potential energy surface derived from a method of calculating shell energies of the KTUY mass formula. We indicate some regions of unknown nuclei with spontaneous-fission dominance and show the "island of stability" in the region of superheavy nuclei. We also point out a possibility of existence of another region of the island of stability beyond the superheavy region. In these regions, spontaneous-fission is very important to determine the border of existence of nuclei.
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Toru Nomura, Yasuhisa Abe
2005 Volume 60 Issue 9 Pages
725-732
Published: September 05, 2005
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Fusion of massive nuclei used for the synthesis of superheavy elements (SHE) is often hindered seriously. Because the compound nucleus is very fissile, its survival probability to reach a residual nucleus without fission is also small. These are biggest difficulties we have in the experimental study of SHE. In this note, we first review the fusion hindrance in terms of the recent two-step model including energy dissipation and discuss a decisive role of energy fluctuation in the fusion mechanism. We secondly point out that the compound nucleus can often survive better through a decay mode including α-particle emission in its deexcitation process. We finally discuss some possible projectile and target combinations to study nuclei in the N=184 region.
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Hidetsugu Sakaguchi
2005 Volume 60 Issue 9 Pages
733-736
Published: September 05, 2005
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Ventricular fibrillation is a serious arrythms, which leads to a sudden death. It is important to understand the mechanism of the ventricular fibrillation and develop an effective method of the defibrillation. The ventricular fibrillation is interpreted as a spiral chaos in the ventricle. We investigate the spiral chaos in the Aliev-Panfilov equation, and propose a few methods of defibrillation from a viewpoint of nonlinear physics.
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Yutaka Maniwa, Hiromichi Kataura
2005 Volume 60 Issue 9 Pages
736-740
Published: September 05, 2005
Released on J-STAGE: April 14, 2008
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Materials in confining geometry are expected to show novel properties which cannot be observed in bulk. Here, we describe our recent results studied by X-ray diffraction experiments on water inside single-walled carbon nanotubes (SWCNT). In spite of one-dimensionality of SWCNT, we observed phase transitional behaviors among liquid, gas and solid like phases. At the narrowest tubes, we discovered the first room temperature ice below 1 atm.
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Noboru Hokkyo
Article type: Article
2005 Volume 60 Issue 9 Pages
741-
Published: September 05, 2005
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Takashi Nakamura
Article type: Article
2005 Volume 60 Issue 9 Pages
741-742
Published: September 05, 2005
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Minoru Biyajima
Article type: Article
2005 Volume 60 Issue 9 Pages
743-
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[in Japanese]
Article type: Article
2005 Volume 60 Issue 9 Pages
744-
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[in Japanese]
Article type: Article
2005 Volume 60 Issue 9 Pages
744-745
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[in Japanese]
Article type: Article
2005 Volume 60 Issue 9 Pages
745-
Published: September 05, 2005
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[in Japanese]
Article type: Article
2005 Volume 60 Issue 9 Pages
745-746
Published: September 05, 2005
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[in Japanese]
Article type: Article
2005 Volume 60 Issue 9 Pages
746-747
Published: September 05, 2005
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
747-
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
748-
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
748-750
Published: September 05, 2005
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
750-759
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
760-761
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
761-762
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
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Published: September 05, 2005
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
763-
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
768-769
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
769-
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
770-771
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Article type: Appendix
2005 Volume 60 Issue 9 Pages
772-
Published: September 05, 2005
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