Lifetime measurement of the 46-keV state in 76As

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Abstract
The lifetime of an excited state of 76As populated in the (n, γ) reaction and observed to decay by 46-keV gamma radiation has been studied, using a multichannel analyzer to record the output of a time-to-amplitude converter. The use of logic modules to determine the differential linearity of the system was studied in detail and is discussed. Experimental findings correlated with results of other studies suggest the following: the lifetime, measured to be 1.93 ± 0.06 μs, is that of the low-lying 46-keV level of 76As characterized by Jπ values of 1+, 2+, or 3 +, strongly populated by direct E1 radiation from the2− and/or 3− capture state and depopulated by E1 radiation to the 2− ground state.

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