| Zugriffsnummer | 19481 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Optical readout time projection chamber (O-TPC) for a study of oxygen formation in stellar helium burning |
| Autor(in); Institution |
Gai, Moshe; Yale University, Department of Physics, New Haven, USA
Breskin, Amos; Weizmann Institute of Science, Department of Particle Physics, Rehovot, ISRAEL
Chechik, Rachel; Weizmann Institute of Science, Department of Particle Physics, Rehovot, ISRAEL
Dangendorf, Volker; 6.5, Neutronenstrahlung, PTB-Braunschweig
Weller, Henry R.; Duke University, Department of Physics, Durham, USA
|
| Quelle/Jahr | Acta Physica Hungarica A: 25 (2006), 2-4, 461 - 468 |
| ISSN | 1219-7580 (PRINT) ; 1588-2675 (ONLINE) |
| DOI | |
| Verlag | Budapest: Akad. Kiado |
| Konferenzangaben | 21st Winter Workshop on Nuclear Dynamics, Breckenridge, 05-12, February, 2005, USA |
| Klassifikationscode | PACS: 25.20.-x ; PACS: 26.50.+x ; PACS: 29.40.Cs ; PACS: 29.40.Gx |
| Freie Schlagworte | TPC ; Optical readout ; GEM ; Stellar evolution ; Helium burning ; Oxygen formation ; S-factor |
| Zusammenfassung | We are developing an Optical Readout Time Projection Chamber (O-TPC) detector for the study of the 12C(α,γ)16O reaction that determines the ratio of carbon to oxygen in helium burning. This ratio is crucial for understanding the final fate of a progenitor star and the nucleosynthesis of elements prior to a Type II supernova; an oxygen rich star is predicted to collapse to a black hole, and a carbon rich star to a neutron star. Type Ia supernovae (SNeIa) are used as standard candles for measuring cosmological distances with the use of an empirical light curve-luminosity stretching factor. It is essential to understand helium burning that yields the carbon/oxygen white dwarf and thus the initial stage of SNeIa. The O-TPC is intended for use with high intensity photon beams extracted from the HIγS/TUNL facility at Duke University to study the 16O(γ, α) 12C reaction, and thus the direct reaction at energies as low as 0.7 MeV. We are conducting a systematical study of the best oxygen containing gas with light emitting admixture(s) for use in such an O-TPC. Preliminary results with CO2 +TEA mixture were obtained. |
Zitierung
Gai, M., Breskin, A., Chechik, R., Dangendorf, V., & Weller, H. R. (2006). Optical readout time projection chamber (O-TPC) for a study of oxygen formation in stellar helium burning. Acta Physica Hungarica A, 25(2-4), 461–468. https://doi.org/10.1556/aph.25.2006.2-4.37