Lifetimes of the 26 and 110 keV levels in <sup>56</sup>Mn

Using thermal-neutron capture on natural manganese targets, delayed coincidence lifetime measurements have been made for the 26 keV level: T1/2 = 8.65 ± 0.50 ns, and the 110 keV level: T1/2 = 5.08 ± 0.15 ns in 56Mn. A systematic error in the 26 keV lifetime measurement, which arises when the 26 keV level is populated by a γ ray which has cascaded through the delayed 110 keV level, has been examined. The experimental reduced M1 and E2 transition probabilities were calculated for the 26 and 84 keV transitions. The reduced M1 strength for the 26 keV transition and the ground-state magnetic dipole moment of 56Mn have been compared with theoretical results obtained using the magnetic moments of neighboring odd-A nuclei as the base states.

Lifetimes of the 26 and 110 keV levels in ⁵⁶Mn Journal Articles