100 citations · 122 across the 5 of their papers we have counts for
5 papers
Analyses of reflection and transmission at moving potential step
Toshiharu Samura, Masato Ohmukai
The reflection and transmission of wave functions at a potential step is a well-known issue in a textbook of quantum mechanics. We studied the reflection and transmission character…
Acceleration of Particles by Oblique Shocks and Cosmic Ray Spectra around the Knee Region
K. Kobayakawa, Y. S. Honda, T. Samura
We examine the first order Fermi acceleration on the presumption that supernova remnant shocks cross ambient magnetic fields with various angles. These oblique shocks accelerate pa…
Newman-Penrose Formalism for Gravitational Shock Waves
Koichi Hayashi, Toshiharu Samura
First order perturbations for the fields with spin on the background metric of the gravitational shock waves are discussed. Applying the Newman -- Penrose formalism, exact solution…
Planckian Scatterings of Massive Particles and Gravitational Shock Waves
Koichi HAYASHI, Toshiharu SAMURA
The scattering process of two particles at Planck energies or beyond is calculated using the gravitational shock wave metric for a massive black hole. Then, the scattering between…
Gravitational Shock Waves for Schwarzschild and Kerr Black Holes
Koichi HAYASHI, Toshiharu SAMURA
The metrics of gravitational shock waves for a Schwarzschild black hole in ordinary coordinates and for a Kerr black hole in Boyer-Lindquist coordinates are derived. The Kerr metri…