[1M17-22] Neutron Capture Cross Sections, Photonucleear Reactions

[1M21] Parities of low-energy states in Hf and W isotopes

*Mohamed Omer¹, Toshiyuki Shizuma², Ryoichi Hajima^1,2, Mitsuo Koizumi¹ (1. JAEA, 2. QST)

Keywords:Parity, Hf, W, Nuclear Resonance Fluorescence

Nuclear resonance fluorescence experiments have been performed on Hf and W natural targets in the 2.5-3.1 MeV energy range using quasi monochromatic γ-ray beams generated from by laser Compton scattering at the HIγS facility, Duke University. The complete polarization of the incident γ-rays has provided the determination of the parity of states in this energy range. Results of these experiments have revealed the parity of about 15 levels in Hf and W nuclei. Such data provide knowledge about the nondestructive detection system of nuclear material by understanding the so-called scissors mode encountered in deformed nuclei including uranium and plutonium isotopes.