Toshitaka Kajino

National Astronomical Observatory of Japan and The Graduate School for Department of Astronomy, Graduate School of Science, University of Tokyo Advanced Science Research Center, Japan Atomic Energy Research Institute KOHSUKE SUMIYOSHI Numazu College of Technology The influence of the neutrino luminosity on the nucleosynthesis of the light elements 7 Li and 11B and the r-process heavy elements in Type II Supernova is investigated. Common models of the neutrino luminosity, which are parameterized...

Info

Where Ya is the number abundance of nuclide with mass number A, and is its initial value. We can see that the large contribution to the production of heavy nuclei is obtained during the late phase of the central Figure 4. Interaction rate of each nuclide with neutrons as a function of central He abundance in 25Mq models of Z Zq 1 (left panel) and 10 3 (right panel). Figure 4. Interaction rate of each nuclide with neutrons as a function of central He abundance in 25Mq models of Z Zq 1 (left...

N Fukuda

The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan E-mail nfukuda riken.go.jp The neutron capture reaction on 14C leading to the l5C ground state, which is important in the nucleosynthesis processes in the universe, has been studied by using the Coulomb dissociation of 15 C on a Pb target at 68 MeV nucleon. The dissociation cross sections at large impact parameters over 20 fm has been translated into the energy spectrum of the neutron capture by...

Riken

2-1 Hirosawa, Wako saitama 351-0198 Japan Department of Physics Kyoto University Advanced Research Institute for Science and Engineering Waseda University 3-4-1 Okubo,Shinjuku-ku Tokyo 169-8555 Japan Skobeltsyn Institute of Nuclear Physics Moscow State University 119992,Moscow Russia Center for Nuclear Study(CNS) University of Tokyo 2-1 Hirosawa, Wako saitama 351-0198 Japan Center for Nuclear Study(CNS) University of Tokyo 2-1 Hirosawa, Wako saitama 351-0198 Japan Department of Physics...

X

C Fe vs Fe H for a large sample of stars, assembled from Rossi et al. ' ,999, crosses) Gustafsson et al. (1999) and Aoki et al. (2002a) and references therein (open circles). Filled circles are from Masseron et al. (2003), and they represent preliminary results from an on-going program at the VLT. in the s-process elements (indicative of classical CH and Ba stars). The star CS 22892-052 (Sneden et al. 1994) was found to be characterised by a unique signature of enhanced r-process...

Conclusions

The present paper reports the basic features of the THM together with a general review of recent applications to several astrophysically relevant reactions. In particular these results show the possibility to extract the bare nucleus two-body cross section via the THM. The THM has proven to be a powerful tool for measuring nuclear reaction cross sections at sub-Coulomb energies. However, a lot remains to do in the future to achieve reliable information for many key reactions and processes,...

R1ken

2-1 Hirosawa, Wako saitama 351-0198 Japan Research Center for the Early Universe University of Tokyo 7-3-1 Hongo,Bunkyo-ku Tokyo 113-0033 Japan 2-1 Hirosawa, Wako saitama 351-0198 Japan Department of Physics & Astronomy University of Tennessee 401 Nielsen Physics Knoxville, Tennessee 37996 USA Osaka University 1-1 Yamadaoka Suita Osaka 565-0871 Japan 2-1 Hirosawa, Wako-shi saitama 350-0198 Japan Department of Physics University of Tokyo 7-3-1 Hongo,Bunkyo ku Tokyo 113-0033 Japan University...

Takaya Nozawa And Takashi Kozasa

Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan E-mail nozama ep.sci.hokudai.ac.jp, kozasa ep.sci.hokudai.ac.jp fflDEYUKI UMEDA, KEIICHI MAEDA AND KENTCHI NOMOTO Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 118-0033, Japan E-mail umeda astron.s.u-tokyo. ac.jp, maeda astron.s.u-tokyo.ac.jp, nomoto Qastron. s. u-tokyo.ac.jp We have investigated the formation of dust grains in the ejecta of...

Measurements Of Li And Eu Isotope Abundances In Metaldeficient Stars

WAKO AOKI National Astronomical Observatory of Japan 2-21-1, Osawa, Mitaka, Tokyo, 181-8588 Japan E-mail aokiwako nao.ac.jp Measurements of isotope abundances give quite strong constraints on nucleosynthesis models. High resolution spectrographs recently mounted on large telescopes enable us to measure isotope abundances for several elements in metal-deficient stars. We report on the measurements of isotope abundances for Europium and Lithium using the 8.2m Subaru Telescope. 1. Measurements of...

Hu Origin of Matter and Evoiution of Qaiaies2003

(Big 'Bang Cosmology andTrimordiaC uckosynthesis Updated Big Bang Nucleosynthesis Compared to WMAP Observations and the Abundance of Light Elements Decaying Cold Dark Matter and Cosmological Microwave Background Anisotropics Hadronic Decay of SUSY Particle and Destruction of Light Elements Observations X- ays, Cosmic Ofays andiMeteoritic McmaCies I Nuclear Astrophysics with the INTEGRAL Observatory Probing the Galactic Chemical Evolution of Si and Ti with Presolar SiC Grains Observations...

T Kajino

National Astronomical Observatory, Mitaka, Tokyo 181-8588, Japan and Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan S. CHIBA AND N. SHINOHARA Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan H. UTSUNOMIYA Konan University, Higashinada, Kobe 658-8501, Japan A 187Os-187Re pair has been known to be a good cosmochronometer for the r-process nucleosynthesis. The radioactivity 187Re decays to a daughter nucleus 187Os with a half-life of 2.0 X 105 years....

Y Inoue

International Center for Elementary Particle Physics, University of Tokyo H. SEKIYA, M. MINOWA, Y. SHIMIZU, W. SUGANUMA Department of Physics, School of Science, University of Tokyo K. MIUCHI, A. TAKEDA Cosmic-Ray Group, Department of Physics, Faculty of Science, Kyoto We, the Tokyo group, have performed some dark matter search experiments at an underground cell in the Kamioka Observatory (2700 m.w.e). Two cryogenic detectors, a 168-g lithium fluoride (LiF) bolometer and a 176-g sodium fluoride...

Theoretical Models For Nuclear Astrophysics

PIERRE DESCOUVEMONT Physique Nucl aire Th orique et Physique Math matique, C.P. 229, Universit Libre de Bruxelles, B-1050 Brussels, Belgium Email pdesc ulb.ac.be We review and compare some theoretical models used in nuclear astrophysics the -matrix method, the DWBA method, and microscopic cluster models. Applications are presented. The .R-matrix theory is illustrated by results of a recent compilation of reactions involved in the Big-Bang nucleosynthesis. The DWBA method is tested with the 13C...

Pi R RSino fhKsPitRl

Where u and are incoming and outgoing Coulomb wave functions. Thus one obtains the 5-matrix elements Slri0, from which any observables, in principle, can be calculated we followed Ref. 13 to calculate the distribution of 7Be fragment from 8B. CDCC treats breakup channels of a projectile explicitly, including all higher-order terms of both Coulomb and nuclear coupling-potentials, which gives very accurate description of dissociation processes in a framework of three-body reaction dynamics....