Please use this identifier to cite or link to this item:
http://dx.doi.org/10.25673/117697
Title: | Positron-annihilation lifetime spectroscopy using electron Bremsstrahlung |
Author(s): | Wagner, A. Anwand, W. Butterling, M. ![]() Cowan, T. E. Fiedler, F. Fritz, F. Kempe, M. Krause-Rehberg, Reinhard |
Issue Date: | 2015 |
Type: | Article |
Language: | English |
Abstract: | A new type of an intense source of positrons for materials research has been set up at the superconducting electron linear. The source employs hard X-rays from electron- bremsstrahlung production generating energetic electron-positron pairs inside the sample under investigation. CW-operation allows performing experiments with significantly reduced pile-up artefacts in the detectors compared to pulsed mode operation in conventional accelerators. The high-resolution timing of the accelerator with bunch lengths below 10 ps full width at half maximum (FWHM) allows positron annihilation lifetime spectroscopy (PALS) measurements with high time resolution. A single-component annihilation lifetime of Kaptonhas been measured as (381.3 ± 0.3) ps. Employing segmented detectors for the detection of both annihilation photons allows for the first time to perform a 4D tomographic reconstruction of the annihilation sites including the annihilation lifetime. |
URI: | https://opendata.uni-halle.de//handle/1981185920/119657 http://dx.doi.org/10.25673/117697 |
Open Access: | ![]() |
License: | ![]() |
Journal Title: | Journal of physics. Conference Series |
Publisher: | IOP Publ. |
Publisher Place: | Bristol |
Volume: | 618 |
Original Publication: | 10.1088/1742-6596/618/1/01204 |
Page Start: | 1 |
Page End: | 6 |
Appears in Collections: | Open Access Publikationen der MLU |
Files in This Item:
File | Description | Size | Format | |
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Wagner_2015_J._Phys.__Conf._Ser._618_012042.pdf | 1.69 MB | Adobe PDF | ![]() View/Open |