Angular Distribution of Annihilation Radiation

1949 ◽  
Vol 76 (3) ◽  
pp. 440-440 ◽  
Author(s):  
S. DeBenedetti ◽  
C. E. Cowan ◽  
W. R. Konneker
Keyword(s):  
Angular Distribution ◽  
Annihilation Radiation

Angular Distribution of Positron Annihilation Radiation in Vanadium and Niobium–Experiment

1975 ◽  
Vol 38 (2) ◽  
pp. 423-430 ◽  
Author(s):  
Nobuhiro Shiotani ◽  
Takuya Okada ◽  
Tadashi Mizoguchi ◽  
Hisashi Sekizawa
Keyword(s):  
Angular Distribution ◽  
Positron Annihilation ◽  
Annihilation Radiation

THE ANGULAR CORRELATION OF ANNIHILATION RADIATION

1951 ◽  
Vol 29 (1) ◽  
pp. 32-35 ◽  
Author(s):  
P. E. Argyle ◽  
J. B. Warren
Keyword(s):  
Angular Distribution ◽  
Angular Correlation ◽  
Electron Energy ◽  
Annihilation Radiation ◽  
Coincidence Rate ◽  
Mass Center ◽  
Average Momentum ◽  
Residual Motion ◽  
Angle Of Deviation

The angular distribution of annihilation radiation from copper 64 has been measured with a pair of scintillation counters in coincidence. Coincidences were found when the counters and source were not quite collinear. The relation between the noncollinear coincidence rate and angle of deviation λ could be closely approximated to by an exponential of the form [Formula: see text], where λ0 = (3.60 ± 0.04) 10−3 radian. Interpreting this departure from antiparallelism of the two photons as arising from the residual motion of the annihilating pair, the average momentum of their mass center in copper is found to be (7.20 mc.) × 10−3 which corresponds to an electron energy of 13.2 ev., if the positron is assumed to be thermalized before annihilation.

Angular Distribution of Positron Annihilation Radiation in Aluminum–Experiment

1976 ◽  
Vol 41 (3) ◽  
pp. 836-840 ◽  
Author(s):  
Takuya Okada ◽  
Hisashi Sekizawa ◽  
Nobuhiro Shiotani
Keyword(s):  
Angular Distribution ◽  
Positron Annihilation ◽  
Annihilation Radiation

On the Angular Distribution of Two-Photon Annihilation Radiation

1950 ◽  
Vol 77 (2) ◽  
pp. 205-212 ◽  
Author(s):  
S. DeBenedetti ◽  
C. E. Cowan ◽  
W. R. Konneker ◽  
H. Primakoff
Keyword(s):  
Angular Distribution ◽  
Annihilation Radiation ◽  
Two Photon ◽  
Photon Annihilation

Angular Distribution of Annihilation Radiation from Plastically Deformed Aluminum

1967 ◽  
Vol 19 (6) ◽  
pp. 307-309 ◽  
Author(s):  
S. Berko ◽  
J. C. Erskine
Keyword(s):  
Angular Distribution ◽  
Annihilation Radiation

The Angular Distribution of Positron Annihilation Radiation

1942 ◽  
Vol 61 (5-6) ◽  
pp. 222-224 ◽  
Author(s):  
Robert Beringer ◽  
C. G. Montgomery
Keyword(s):  
Angular Distribution ◽  
Positron Annihilation ◽  
Annihilation Radiation

Angular Distribution of Positron Annihilation Radiation in Vanadium and Niobium–Theory

1975 ◽  
Vol 38 (2) ◽  
pp. 416-422 ◽  
Author(s):  
Shinya Wakoh ◽  
Yasunori Kubo ◽  
Jiro Yamashita
Keyword(s):  
Angular Distribution ◽  
Positron Annihilation ◽  
Annihilation Radiation

Angular Distribution of Single-Quantum Annihilation Radiation

1967 ◽  
Vol 159 (1) ◽  
pp. 61-68 ◽  
Author(s):  
W. R. Johnson
Keyword(s):  
Angular Distribution ◽  
Annihilation Radiation ◽  
Single Quantum

Angular Distribution of Positron Annihilation Radiation in RSb(R=La, Ce and U)

1992 ◽  
Vol 105-110 ◽  
pp. 707-710 ◽  
Author(s):  
Y. Kubo ◽  
S. Asano
Keyword(s):  
Angular Distribution ◽  
Positron Annihilation ◽  
Annihilation Radiation

Electron Scattering in Solids

1990 ◽  
Vol 48 (2) ◽  
pp. 4-5
Author(s):  
Ryuichi Shimizu ◽  
Ze-Jun Ding
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Angular Distribution ◽  
Elastic Scattering ◽  
Electron Scattering ◽  
Cross Sections ◽  
Expansion Method ◽  
Electron Excitation ◽  
Partial Wave Expansion ◽  
Backscattered Electrons

Monte Carlo simulation has been becoming most powerful tool to describe the electron scattering in solids, leading to more comprehensive understanding of the complicated mechanism of generation of various types of signals for microbeam analysis.The present paper proposes a practical model for the Monte Carlo simulation of scattering processes of a penetrating electron and the generation of the slow secondaries in solids. The model is based on the combined use of Gryzinski’s inner-shell electron excitation function and the dielectric function for taking into account the valence electron contribution in inelastic scattering processes, while the cross-sections derived by partial wave expansion method are used for describing elastic scattering processes. An improvement of the use of this elastic scattering cross-section can be seen in the success to describe the anisotropy of angular distribution of elastically backscattered electrons from Au in low energy region, shown in Fig.l. Fig.l(a) shows the elastic cross-sections of 600 eV electron for single Au-atom, clearly indicating that the angular distribution is no more smooth as expected from Rutherford scattering formula, but has the socalled lobes appearing at the large scattering angle.

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