Excited states in 216Ra

Excited states in ²¹⁶Ra have been studied using in-beam spectroscopic techniques. The reactions used were ²⁰⁸Pb(¹²C, 4n)²¹⁶Ra and ²⁰⁸Pb(¹³C, 5n)²¹⁶Ra at 80 and 95 MeV, respectively. The level scheme of ²¹⁶Ra was extended up to the (28^?) state at 6266 keV. Two new isomers, whose mean lives are 8.7 ± 0.6 ns and 9.7 ± 0.9 ns, were found to be the 19^? state at 3763 keV and the (25^?) state at 5170 keV. Levels up to the (25 ^?) state in ²¹⁶Ra are interpreted as arising from the weak coupling of two neutrons to the excited states in ²¹⁴Ra.