The Systematics of Dipole Modes in the Even-Even HF Nuclei

Details The Systematics of Dipole Modes in the Even-Even HF Nuclei The Systematics of Dipole Modes in the Even-Even HF Nuclei

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cgrs.conf..809s&link_type=abstract

CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS. Proceedings of the Eleventh International Symposium. Held 2-6 September 2002

Physics

Scientific paper

The strength distribution of low-lying dipole excitations in 176Hf was studied in nuclear resonance fluorescence experiments (NRF) performed at the Stuttgart bremsstrahlung facility (endpoint energy 4.1 MeV). Spectroscopic information was obtained on about 40 spin 1 states unknown so far. Ascribing a positive parity to all observed K = 1 states the detected total B(M1) ↑ strengths in the energy range of the Scissors Mode amounts to 2.40(6) μ 2N nearly as much as for well deformed midshell rare earth nuclei. The total strength is higher as in the heavier Hf isotopes 178,180Hf and fits well into the systematics. The observed low-lying ΔK=0 transitions (with probable E1 character) lie in the energy range around 2 MeV as expected from the systematics and have excitation probabilities characteristic for nuclei in the transitional region from deformed rotors to more γ-soft nuclei.

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