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Study of the low-lying states in /sup 178/Hf through the neutron capture reaction

Conference ·
OSTI ID:6432447
The decay of the low-lying states of /sup 178/Hf was investigated using: (1) high-resolution curved crystal spectrometry of the secondary ..gamma..-rays using the GAMS-1 and GAMS 2/3 facilities at the ILL, (2) measurements of the secondary (n,e/sup -/) transitions using the Electron Spectrometer BILL at the ILL, (3) measurements of the primary ..gamma..-transitions following thermal neutron capture with the pair-spectrometer at the ILL, and (4) Average Resonance Capture (ARC) measurements at the neutron energies of 2 keV and 24 keV, using the tailored beam facilities at BNL. A level scheme including 69 levels and 270 transitions up to an excitation energy of 2.1 MeV was constructed. Most of the levels were ordered in 18 different rotational bands. The levels assigned to rotational bands, along with the deexcitation modes of the ..gamma..-band (inset), are displayed. The level scheme of /sup 178/Hf seems to be complete below 2 MeV for spins between 2 and 5.
Research Organization:
Brookhaven National Lab., Upton, NY (USA); Koeln Univ. (Germany, F.R.). Inst. fuer Kernphysik; Institut Max von Laue - Paul Langevin, 38 - Grenoble (France)
DOE Contract Number:
AC02-76CH00016
OSTI ID:
6432447
Report Number(s):
BNL-35322; CONF-840906-12; ON: DE85000882
Country of Publication:
United States
Language:
English