Abstract
The excitation energy of the first state in has been determined to be 4440.0±0.5 keV by means of the () reaction at 23 MeV incident proton energy. rays were detected by a Ge(Li) detector in coincidence with inelastically scattered protons to reduce Doppler broadening. An anomaly in which a symmetrical doublet appeared in the -ray singles spectrum observed at 90° to the beam direction is explained on the basis of a coherent Doppler effect involving selective population of the magnetic sublevels of the state in the inelastic scattering process.
- Received 19 October 1966
DOI:https://doi.org/10.1103/PhysRev.162.957
©1967 American Physical Society