L. I. Ponomarev

Coulomb Deexcitation and Non-Resonant Meson Transfer from Excited States of Mesic Hydrogen Isotope Atoms

Advanced adiabatic approach is used to calculate the rates of the Coulomb deexcitation and charge transfer processes including meson transfer from a heavy isotope to a light one.

Acceleration of Mesic Atoms Associated with Auger Transitions in Low Energy Collisions

New mechanisms of mesic atom acceleration associated with Auger transitions in mesic hydrogen at low energy collisions (10−3<ε<10 eV) with a hydrogen atom are considered. Two possible mechanisms are discussed: Auger-plus and Auger-minus processes, which can accelerate mesic atoms up to kinetic energy ∼1 eV and ∼100 eV, respectively.

Symmetric Elastic and Spin-Flip Low-Energy Collisions of the Hydrogen-Isotope Mesic Atoms in the Adiabatic Hyperspherical Approach *

The reduced adiabatic hyperspherical (RAHS) basis suggested previously is used to calculate elastic and spin-flip cross sections in the processes (aμ)F+a → (aμ)F′+a, a=(p, d, t), for collision energies 10−3≤ɛ≤102 eV. The rapid convergence of the method is demonstrated: to achieve an accuracy of ⋍1% in the calculated cross sections, it is sufficient to use N≤10 of the basis RAHS functions. The comparison of the obtained results with the previous ones is presented.

Adiabatic hyperspherical approach to describing low-energy mesic-atom scattering

The adiabatic hyperspherical approach developed previously is used to describe the asymmetric mesic-atom scattering aμ+b → aμ+b, a+bμ (a, b=p, d, t) in the collision-energy range 10−3≤ɛ≤102 eV. Boundary conditions for J≠0 scattering states are formulated, and partial cross sections for J=0–3 are calculated. Effective numerical codes are developed, and a fast convergence of the adiabatic hyperspherical approach is demonstrated: to achieve a precision of about 1% in the calculated cross sections, it is sufficient to use a basis of not more than ten adiabatic hyperspherical functions. The results that we obtained are compared with the previous ones.

μCF Intense Neutron Source and Nuclear Waste Incineration

It was shown in a series of papers, that a 14-MeV intense neutron source based on muon-catalyzed fusion with intensity J = 1017 n/s and flux Φ = 1014 n/s/cm2 can be constructed on the current technology base. Also it was demonstrated that 14 MeV neutrons are essential to drive effective transmutation of problematic radionuclides. For this reason, advanced methods of the neutron generation are outlined in the present paper with the focus on the beam parameter estimations inherent in the KEK-JAERI project.

Uniform Description of the Bound, Quasistationary and Scattering States in the Coulomb three-Body Systems Using Adiabatic Hyperspherical Basis

The method, its numerical realization and applications for the calculations of the different characteristics of the Coulomb three-body (CTB) problem are presented. The method was successfully applied for the description of the three-body bound states (including the local characteristics of the wave function) as well as for the scattering processes 2 → 2 (including the characteristics of the resonance states).

Advanced adiabatic approach to superlow-energy inelastic collisions of mesic atoms in excited states

The advanced adiabatic approach previously proposed for describing collision problems in atomic physics is extended to the specific case of mesic-atom collisions in the excited states n≥2. The method and the algorithm of the calculations are described. The calculations of the charge-exchange and Coulomb deexcitation rates in collisions of (pμ)n, (dμ)n, and (tμ)n muonic atoms in the excited states n=3, 4, 5 with the hydrogen isotopes p, d, t are presented in comparison with the conventional adiabatic approach.

Design of the Intense Neutron Source Based on Muon Catalyzed Fusion for Irradiation Materials of Fusion Reactors and Other Applications

CF-INS) is designed to test the structural materials of D–T fusion reactors by neutronirradiation [1, 2, 4–7, 13]. Recently a possibility of transmutation of radiotoxicisotopes using such a type of a neutron source was also considered in [3]. A com-parison of characteristics of different types of intense neutron sources is givenin [1, 23] and in the conclusion of this report. Here we recall only the main featuresof

Spin-Flip and Elastic Processes in Slow Collisions of Mesic Atoms

AbstractThe reduced adiabatic hyperspherical (RAHS) basis suggested previously is used for the calculation of elastic and spin-flip cross sections in the processes (aμ)F + a → (aμ)F′ + a, a = (p, d, t), for collision energies 10−3 ≤ ε ≤ 102 eV. The rapid convergence of the method is demonstrated. A comparison of the obtained results with previous ones is presented.