Abstract
We observed that the annihilation radiation photopeak in a Ge(Li) detector is considerably broader than that of a γ ray of the same energy. It seems reasonable to assume that the increased width is the result of the Doppler broadening of the annihilation photopeak, i.e., the longitudinal Doppler shift of the radiations is measured, while the transverse shift is measured in the usual angular-correlation experiments. By using a computer stripping program to remove the distortion produced by the finite energy resolution of our detector, we obtain momentum distributions in agreement with those which have been published. Only one detector is necessary for these measurements, and all momentum channels are detected at once. However, the detector energy resolution severely limits the momentum resolution. Arguments are presented which indicate that no very large improvement in Ge(Li) detector resolution can be expected. © 1968 The American Physical Society.
Recommended Citation
H. P. Hotz et al., "Measurement Of Positron Annihilation Line Shapes With A Ge(Li) Detector," Physical Review, vol. 170, no. 2, pp. 351 - 355, American Physical Society, Dec 1968.
The definitive version is available at https://doi.org/10.1103/PhysRev.170.351
Department(s)
Physics
International Standard Serial Number (ISSN)
0031-899X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 American Physical Society, All rights reserved.
Publication Date
01 Dec 1968
