Investigation of22Na excited states |
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Authors: | A Anttila M Bister E Arminen |
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Institution: | 1. Department of Physics, University of Helsinki, Helsinki, Finland
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Abstract: | Fourteen21Ne(p, γ)22Na resonances have been observed in the rangeE p =300–1,300 keV. Theγ-decay of all these resonances has been investigated by means of a 38 cm3 Ge(Li) detector. Energies and branching ratios of several bound states have been determined. TheQ-value was determined as 6,738.5±1.7 keV. Lifetimes of seven states were determined with the Doppler-shift attenuation method. The observed upper limit (τ m ≦4 fs) of the lifetime for the 4,071 keV state, regarded as the analogue of the third excited state in22Ne, and the transition observed from this state to the 1,528 keV state do not support the proposed rotational band structure of the22Na low-lying states. |
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