L. D. Blokhintsev

The Trojan Horse Method in nuclear astrophysics

The study of energy production and nucleosynthesis in stars requires an increasingly precise knowledge of the nuclear reaction rates at the energies of interest. To overcome the experimental difficulties arising from the small cross sections at those energies and from the presence of the electron screening, the Trojan Horse Method has been introduced. The method provides a valid alternative path to measure unscreened low-energy cross sections of reactions between charged particles, and to retrieve information on the electron screening potential when ultra-low energy direct measurements are available.

Trojan Horse as an indirect technique in nuclear astrophysics

The Trojan Horse method is a powerful indirect technique that provides information to determine astrophysical factors for binary rearrangement processes x + A → b + B at astrophysically relevant energies by measuring the cross section for the Trojan Horse reaction a + A → y + b + B in quasi-free kinematics. We present the theory of the Trojan Horse method for resonant binary subreactions based on the half-off-energy-shell R matrix approach which takes into account the off-energy-shell effects and initial and final state interactions.

Non-relativistic Feynman graphs and direct nuclear reactions

Abstract The properties of non-relativistic graphs are studied in connection with the new approach to the description of direct nuclear reactions on the basis of graph technique and dispersion relations. An integral representation, an analogue of the relativistic representation of Chisholm-Nambu, is obtained for an arbitrary non-relativistic graph. Equations are derived for finding the singularities of non-relativistic graphs. The analytic properties of single-loop graphs are discussed in detail. With the vertices constant, an explicit expression is obtained for the triangle amplitude when the virtual particle masses are arbitrary. The invariant kinematic description is given of the nuclear reactions of the type A ( x , y ) B in the non-relativistic region. The nearest singularities of the amplitudes of several nuclear reactions are indicated on the basis of the results obtained, which warrants definite conclusions on the mechanism of these reactions.

Updated evidence of the Trojan horse particle invariance for the 2 H( d , p ) 3 H reaction

The Trojan Horse nucleus invariance for the binary d(d,p)t reaction was tested using the quasi free

The Feyman graph treatment of the initial and final state interactions in direct nuclear reactions

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Absorption of polarized μ−-mesons by nuclei the neutron angular distribution

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On the interaction between μ-mesons and nucleons

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Peripheral model approach to the process of radiative proton capture by tritium

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Effective-range expansion for two coupled channels and properties of bound states

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Application of the method of integral equations for calculating the vertex constants for an α-particle

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