Mean lifetimes of levels in 55Co |
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| Authors: | R.O. Nelson J.R. Williams D.R. Tilley D.G. Rickel N.R. Roberson S. Maripuu C.P. Cameron R.D. Ledford |
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| Affiliation: | 1. North Carolina State University, Raleigh, North Carolina 27607, USA;2. Triangle Universities Nuclear Laboratory Durham, North Carolina 27706, USA;3. Duke University, Durham, North Carolina 27706, USA;4. Triangle Universities Nuclear Laboratory Durham, North Carolina 27706, USA |
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| Abstract: | The mean lifetimes of levels in 55Co below 5.2 MeV have been investigated with the Doppler-shift attenuation method and the 54Fe(3He, d)55Co reaction at 12 MeV. Scattered particles were detected in two E-ΔE telescopes at ±55° with respect to the beam axis, in coincidence with γ-rays observed at 90° and 130° in a 50 cm3 Ge(Li) detector. Mean lifetimes are reported for the following levels (energy in keV, lifetime in fs): 2166 (139±18), 2566 (680±200), 2923 (>245), 2939 (190±65), 3303 (99±22), 3323 (54±15), 3642 (680?300+400), 3943 (>170), 4164 (54±15), 4180 (<16), 4722 (<33), 4749 (<70) and 5174 (<40). The experimental results are compared with a detailed shell-model calculation. |
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| Keywords: | Nuclear reaction |
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