Quantum-mechanical approach to planar positron channeling in a longitudinal hypersonic field

Abstract

The wave function of a planar-channeled positron with energy 10 MeV≤E≤100 MeV under the resonant influence of hypersound is calculated. It is found that the longitudinal hypersound changes the spectral distribution of the channeling radiation significantly. With decreasing wavelength λ_s of the hypersound, starting from λ_s = λ_E, where λ_E is the characteristic length related to one transverse oscillation of the channeled positron, a new type of radiative transition occurs. It is characterized by the stimulated enhancement of transverse energy of the positron at channeling (inverse radiative transition). When λ_s approaches λ_E/2 the inverse transitions show a resonant behaviour.

Original language	English
Pages (from-to)	132-141
Number of pages	10
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	173
Issue number	1
DOIs	https://doi.org/10.1016/S0168-583X(00)00245-7
Publication status	Published - 1 Jan 2001
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/S0168-583X(00)00245-7

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Grigoryan, L. S., Mkrtchyan, A. R., Mkrtchyan, A. H., Khachatryan, H. F., Prade, H., Wagner, W., & Piestrup, M. A. (2001). Quantum-mechanical approach to planar positron channeling in a longitudinal hypersonic field. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 173(1), 132-141. https://doi.org/10.1016/S0168-583X(00)00245-7

Quantum-mechanical approach to planar positron channeling in a longitudinal hypersonic field. / Grigoryan, L. Sh; Mkrtchyan, A. R.; Mkrtchyan, A. H.; Khachatryan, H. F.; Prade, H.; Wagner, W.; Piestrup, M. A.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 173, No. 1, 01.01.2001, p. 132-141.

Research output: Contribution to journal › Article › peer-review

Grigoryan, LS, Mkrtchyan, AR, Mkrtchyan, AH, Khachatryan, HF, Prade, H, Wagner, W & Piestrup, MA 2001, 'Quantum-mechanical approach to planar positron channeling in a longitudinal hypersonic field', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 173, no. 1, pp. 132-141. https://doi.org/10.1016/S0168-583X(00)00245-7

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abstract = "The wave function of a planar-channeled positron with energy 10 MeV≤E≤100 MeV under the resonant influence of hypersound is calculated. It is found that the longitudinal hypersound changes the spectral distribution of the channeling radiation significantly. With decreasing wavelength λs of the hypersound, starting from λs = λE, where λE is the characteristic length related to one transverse oscillation of the channeled positron, a new type of radiative transition occurs. It is characterized by the stimulated enhancement of transverse energy of the positron at channeling (inverse radiative transition). When λs approaches λE/2 the inverse transitions show a resonant behaviour.",

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AU - Prade, H.

AU - Wagner, W.

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AB - The wave function of a planar-channeled positron with energy 10 MeV≤E≤100 MeV under the resonant influence of hypersound is calculated. It is found that the longitudinal hypersound changes the spectral distribution of the channeling radiation significantly. With decreasing wavelength λs of the hypersound, starting from λs = λE, where λE is the characteristic length related to one transverse oscillation of the channeled positron, a new type of radiative transition occurs. It is characterized by the stimulated enhancement of transverse energy of the positron at channeling (inverse radiative transition). When λs approaches λE/2 the inverse transitions show a resonant behaviour.

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