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Multi-modal fission of the uranium nucleus at the low excitation energy has been dynamically investigated. The multi-dimensional Langevin equation is used for the dynamical calculation. We used the potential energy taking account of the microscopic energy which depends on the excitation energy. We obtained the peaks of the mass distribution and the total kinetic energy (TKE) distribution. The former is consistent with experimental results and the latter is consistent with experimental systematics. We study the evolution of the mass-asymmetry of the fragments in the dynamical process from the second saddle to the scission. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Multi-modal fission has been systematically investigated for the series of isotopes of Fm and Cf. The multi-dimensional Langevin-type stochastic differential equation is used for the dynamical calculation. The primary fission mode changes from mass-asymmetric fission to mass-symmetric fission with the increase of neutron numbers for both Fm and Cf cases. [ABSTRACT FROM AUTHOR]

The wide-band all-sky monitor (WAM) onboard Suzaku has the largest effective area in 300–5000 keV, and thus very powerful to constrain the E peak and high energy tail of gamma-ray burst prompt emission. Collaboration with GLAST will give us high-quality data of gamma-ray prompt emissions to probe and resolve the emission mechanism and central engine of gamma-ray bursts. Here we report initial results of the WAM and address on the collaboration with GLAST. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]