Order-to-chaos transition in warm rotating W-174 nuclei


Vandone V., Leoni S., Bracco A., Bottoni S., Camera F., Corsi A., ...Daha Fazla

178th Course of the International School of Physics Enrico Fermi on From the Big Bang to the Nucleosynthesis, Ravenna, İtalya, 19 - 24 Temmuz 2010, cilt.178, ss.427-430 identifier identifier

  • Cilt numarası: 178
  • Doi Numarası: 10.3254/978-1-60750-974-5-427
  • Basıldığı Şehir: Ravenna
  • Basıldığı Ülke: İtalya
  • Sayfa Sayıları: ss.427-430

Özet

The transition between order and chaos is studied in the warm rotating nucleus W-174 by gamma-spectroscopy, focusing on the conservation of selection rules of the K quantum number with the excitation energy. The W-174 nucleus was populated at high spins by the fusion-evaporation reaction of Ti-50 (at 217 MeV) on a Te-128 backed target. The experiment was performed in Legnaro National Laboratory using the AGATA Demonstrator HPGe-array (AD) coupled with an array of 27 BaF2 scintillator detectors. High-energy gamma-rays measured in the AD and in the scintillators array will be also analyzed to study the Giant Dipole Resonance (GDR) in the compound nucleus W-178. The discrimination between n and gamma in the AD detectors will be employed, following a procedure recently developed by Monte Carlo simulations and using digital Pulse Shape Analysis timing techniques.