Eigenvalue Problem in the Neutron Thermalization
نویسندگان
چکیده
منابع مشابه
Fast Neutron Thermalization
The penetration of 14-MeV neutrons into five representative soils is investigated with two independent neutron transport calculational procedures. From Monte Carlo and discreteordinates codes, the spatial distribution of the thermal fluence and the capture of neutrons in the soils is determined for two neutron source geometries. Finally, empirical approximations of the thermal neutron fluence i...
متن کاملThermalization in a model of neutron star
We consider a simple model used by Lattimer et al. to describe the evolution of temperature [7] in neutron stars. It supposes a linear dependence of the specific heat as a function of temperature and assumes that a mechanical equilibrium is reached, so the problem reduces to the study of large time asymptotic for a Fast Diffusion Equation satisfied by the temperature. In fact this model suppose...
متن کاملOn the nonnegative inverse eigenvalue problem of traditional matrices
In this paper, at first for a given set of real or complex numbers $sigma$ with nonnegative summation, we introduce some special conditions that with them there is no nonnegative tridiagonal matrix in which $sigma$ is its spectrum. In continue we present some conditions for existence such nonnegative tridiagonal matrices.
متن کاملThe Eigenvalue Problem: Perturbation Theory The Unsymmetric Eigenvalue Problem
The Unsymmetric Eigenvalue Problem Just as the problem of solving a system of linear equations Ax = b can be sensitive to perturbations in the data, the problem of computing the eigenvalues of a matrix can also be sensitive to perturbations in the matrix. We will now obtain some results concerning the extent of this sensitivity. Suppose that A is obtained by perturbing a diagonal matrix D by a ...
متن کاملSome results on the symmetric doubly stochastic inverse eigenvalue problem
The symmetric doubly stochastic inverse eigenvalue problem (hereafter SDIEP) is to determine the necessary and sufficient conditions for an $n$-tuple $sigma=(1,lambda_{2},lambda_{3},ldots,lambda_{n})in mathbb{R}^{n}$ with $|lambda_{i}|leq 1,~i=1,2,ldots,n$, to be the spectrum of an $ntimes n$ symmetric doubly stochastic matrix $A$. If there exists an $ntimes n$ symmetric doubly stochastic ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan
سال: 1963
ISSN: 0004-7120
DOI: 10.3327/jaesj.5.944