Constraints on the universe as a numerical simulation |
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Authors: | Silas R Beane Zohreh Davoudi Martin J Savage |
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Institution: | 1. INFN, Sezione di Roma “Tor Vergata”, I-00133, Rome, Italy 2. Dipartimento di Fisica, Università di Roma “Tor Vergata”, I-00133, Rome, Italy 3. INFN, Sezione di Roma, I-00185, Rome, Italy 4. Dipartimento di Fisica, Università di Roma “La Sapienza”, I-00185, Rome, Italy 5. INFN, Laboratori Nazionali del Gran Sasso, I-67100, Assergi (AQ), Italy 6. Institute for Nuclear Research, 03680, Kyiv, Ukraine
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Abstract: | The level scheme above the proton threshold in 26Si is crucial for evaluating the 25Al(p, γ)26Si stellar reaction, which is important for understanding the astrophysical origin of the long-lived cosmic radioactivity 26Al(T 1/2 = 7.17 × 105 y) in the Galaxy. The excited states in 26Si have been studied using an in-beam γ-ray spectroscopy technique with the 24Mg(3He, nγ)26Si reaction. γ-rays with energies up to 4.6 MeV emitted from excited states in 26Si have been measured using large volume HPGe detectors. The spin-parity of one of the most important states reported recently at 5890.0keV has been assigned as 0+ by γ-γ angular correlation measurements in this work. |
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