Results 171 to 180 of about 144,387 (227)

Role of free volume in governing electrical transport in V₂O₅-Cu₂O-P₂O₅ glass ceramic nanocomposites. [PDF]

Sci Rep
El Refaay DE, El-Desoky MM, Harby AE, Mohamed HFM, Abdel-Hady EE, Elsharkawy YS.   +5 more
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Positron annihilation in enzymes.

Indian journal of biochemistry & biophysics, 1982
H, Prasad, K P, Singh, P C, Jain
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RADIATIONLESS ANNIHILATION OF POSITRONS

RADIATIONLESS ANNIHILATION OF POSITRONS
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Positron Annihilation in the Galaxy

, 2019
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Annihilation of positrons in the Galaxy

Experimental Astronomy, 2006
Observations of electron-positron annihilation radiation from the Galactic Center region with the SPI instrument aboard INTEGRAL are summarized. The measured width of the 511 keV line and inferred fraction of positrons annihilating through positronium formation are consistent with the annihilation taking place in the warm ISM phase, although ...
Sazonov, S., Churazov, E., Sunyaev, R., Revnivtsev, M.   +3 more
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Positron Annihilation in Semiconductors

Physical Review, 1968
Positron decay curves in various semiconducting elements and in the semimetals As, Sb, and Bi have been measured with a delayed coincidence system with 0.35 nsec full width at half-maximum prompt time resolution. The annihilation in ideal, pure semiconductors is found to be characterized by a simple exponential decay: The second low-intensity decay ...
R. FIESCHI, A. GAINOTTI, M. MANFREDI, GHEZZI, Carlo   +3 more
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On the Annihilation of Positrons

Mathematical Proceedings of the Cambridge Philosophical Society, 1936
We shall discuss the annihilation of positrons by a process in which only one quantum of light is emitted. The positive electron is regarded as a hole or unoccupied state in the distribution of electrons in negative energy states, and is destroyed by an atomic electron jumping down into it with the emission of a single quantum.
J. C. Jaeger, H. R. Hulme
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Positron profiles and positron annihilation in thin layers

physica status solidi (a), 1982
The moderated positron density distribution over the sample depth is properly calculated. The results obtained are used as the basis for the positron annihilation probability in thin foils and surface layers. The annihilation photon angular distribution (APAD) for the double-layer samples is measured.
A. D. Pogrebnyak, V. A. Kuzminikh, K. P. Arefev   +2 more
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Positron Annihilation in Metals

Proceedings of the Physical Society, 1962
First-order perturbation theory has been applied to calculate the annihilation rate of positrons in a metal, represented by a Fermi gas of free electrons. In view of the possibility that a bound positronium atom may be formed, some justification is needed before perturbation theory may be used.
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