Adapted swimming pool tank reactor Austria
The Adapted Swimming Pool Tank Reactor Austria ( ASTRA ) was a research reactor that was built and operated on the site of the Austrian Reactor Center Seibersdorf (southeast of Vienna ) as part of today's Austrian Institute of Technology . It was in operation from 1960 to 1999.
Lapse of time
| time | power |
|---|---|
| September 1960 | 100 kW (first criticality ) |
| May 1962 | 1 MW |
| August 1962 | 5 MW |
| August 1969 | 6 MW |
| 1972 | 7 MW |
| January 1975 | 8 MW |
| ~ 1989 | 9.5 MW |
| 1999 | Shutdown |
research
The neutron decay experiment is one of the most complex physical experiments carried out on the ASTRA reactor. Here the spectrum of the recoil protons , which are created when the neutron decays , was measured; the center of a highly evacuated tangential beam pipe of the reactor served as a neutron source. The aim of the experiment was to determine the ratio of the two coupling constants g A and g V of the weak interaction from the shape of the spectrum of the recoil protons. This spectrum was analyzed using an electrostatic spectrometer; the protons were counted by an ion-electron converter.
The result was | g A / g V | = 1.259 ± 0.017. This is in good agreement with the latest - much more precise - mean value g A / g V = - 1.2695 ± 0.0029, which was measured on polarized neutrons and therefore also contains the sign .
literature
- R. Dobrozemsky: Production of a Clean Neutron Gas for Decay and Scattering Experiments. In: Nuclear Instruments and Methods. 118: 1-37 (1974).
- Austrian Study Society for Atomic Energy: Astra Reaktor Reaktorzentrum Seibersdorf . Vienna, Koska Verlag, (1961)
Individual evidence
- ↑ R. Dobrozemsky, E. Kerschbaum, G. Moraw, H. Paul , C. Stratowa, P. Weinzierl: Electron-neutrino angular correlation coefficient a Measured from free-neutron decay. In: Physical Review. D 11 (1975), p. 510.
- ↑ C. Stratowa, R. Dobrozemsky, P. Weinzierl: Ratio | g A / g V | derived from the proton spectrum in free neutron decay. In: Physical Review. D 18 (1978), p. 3970.
- ↑ W.-M. Yao et al. (Particle Data Group), Journal of Physics G 33 (2006) p. 1 online