Photoproduction of Neutral Pions in Complex Nuclei PDF Download
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Author: Christian Albertus Engelbrecht
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 276
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Book Description
The photoproduction of neutral pions from complex nuclei is expressed in terms of the photoproduction from single nucleons by means of the direct interaction model and the impulse approximation. A summation over all final states of the nucleus is performed by means of a closure approximation.
Author: Christian Albertus Engelbrecht
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 276
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Book Description
The photoproduction of neutral pions from complex nuclei is expressed in terms of the photoproduction from single nucleons by means of the direct interaction model and the impulse approximation. A summation over all final states of the nucleus is performed by means of a closure approximation.
Author: Christian Albertus Engelbrecht
Publisher:
ISBN:
Category : Photopions
Languages : en
Pages : 146
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Book Description
The photoproduction of neutral pions from complex nuclei is expressed in terms of the photoproduction from single nucleons by means of the direct interaction model and the impulse approximation. A summation over all final states of the nucleus is performed by means of a closure approximation.
Author: Robert Henry Traxler
Publisher:
ISBN:
Category : Pion production
Languages : en
Pages : 92
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Book Description
Author: Robert Henry Traxler
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
Author: Robert Henry Traxler
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
A simple theory of the photoproduction of pi /sup 0/ mesons from complex nuclei based on the impulse and closure approximation is studied. The theory is compared with an experiment of Goodwin, Anderson, and Kenney that shows the dependence of the number of decay gammas from pi /sup 0/ mesons photo- produced from various nuclei as a function of the atomic number at 45, 90, and 135 degrees for incident photon energies from threshold to 350 Mev. The dependence measured near threshold and at 45 degrees does not agree with the simple theory nor is it consistent with partial elastic production. By a method of Placzek and Wick the corrections to the simple theory are estimated, and found to be large near threshold. These corrections may explain the discrepancy between the theory and the experimental results. No information about the nuclear-pair correlation function is obtained. The impulse approximation is used to calculate the relative ratio of the radiative absorption rate of pi /sup -/ mesons absorbed in hydrogen and deuterium from an atomic s state. The calculated value of the ratio T = R(pi /sup -/ + d yields 2n + gamma)/R(pi /sup -/ + p yields n + gamma) is 0.83 plus or minus 0.08. The experimental value is 0.41 plus or minus 0.06. The closure approximation is used to evaluate T. By a method due to Placzek the error due to the closure approximation is shown to be small. (auth).
Author: Christian Albertus Engelbrecht
Publisher:
ISBN:
Category : Photopions
Languages : en
Pages : 276
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Book Description
The photoproduction of neutral pions from complex nuclei is expressed in terms of the photoproduction from single nucleons by means of the direct interaction model and the impulse approximation. A summation over all final states of the nucleus is performed by means of a closure approximation.
Author: Anton Nagl
Publisher: Springer
ISBN: 3540460667
Category : Science
Languages : en
Pages : 182
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Book Description
Photoproduction of pions from complex nuclei has become an investigative tool for (1) the detailed form of the elementary photopion amplitude, (2) the pion-nucleus optical potential, (3) nuclear structure, and (4) off-shell and medium effects on the elementary amplitude in nuclear processes. In this book, all these aspects are considered in detail. With improved experimental accuracy and beam tech- nology the study of nuclear pion photoproduction will break new ground and become an even more powerful investigative tool. This monograph is intended as an introductory guide as well as a reference manual for grad- uate students and researchers working in this important area of physics.
Author: A. A. Komar
Publisher: Nova Publishers
ISBN: 9780941743778
Category : Science
Languages : en
Pages : 372
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Book Description
Studies the theoretical and experimental aspects of photoproduction of pions on nucleons and nuclei in the range of photon energies up to 1 GeV. Theoretical predictions are presented based on dispersion relationships of multiple pion photoproduction amplitudes. The problem of a complete experiment i
Author: Bryon Mann
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
