Alpha decay properties of199Rn and199mRn
Theα-decays of199Rn (Eα = (6.989±0.010) MeV,T1/2>300ms) and of199mRn (Eα = (7.060±0.015) MeVT1/2=(61−2+32) ms) were identified by anα-α-correlation method. They proceed via separated decay paths to195Po and195mPo, respectively. The spins of the involved states are discussed by aid of the shell model, and a tentative spin assignment is given.