TY - JOUR AU - H. Moos AU - J. Woodworth BT - Physical Review Letters DA - Jan-04-1973 DO - 10.1103/PhysRevLett.30.775 PY - 1973 SP - 775 EP - 778 T2 - Physical Review Letters TI - Observation of the Forbidden 2^3S1\textrightarrow1^1S0 Spontaneous Emission Line from Helium and Measurement of the Transition Rate UR - http://link.aps.org/doi/10.1103/PhysRevLett.30.775 VL - 30 SN - 0031-9007 ER -