Abstract
The γ spectra of the neutron-deficient nuclei
49Mn and
49Cr have been observed using the reactions
12C(
40Ca, p2n)
49 Mn and
12C(
40Ca,2pn)
49Cr at
E(Ca)=160 MeV.Radiation from
49Mn and
49Cr was identified by detecting recoil ions in a 0° mass separator. Data from γ-γ, recoil-γ and recoil-γ-γ coincidence spectra and recoil-γ angular correlations allowed the level scheme of
49
25Mn
24 to be deduced up to 6 MeV (19/2
−).The levels of the mirror nucleus
49
24Cr
25 were observed to over 10 MeV (27/2
−). Relative Coulomb energies for the mirror states were found to have a smooth
J dependence. The rotation-like level spacing at low spin is interrupted at
J=19/2
−, and this is interpreted as an alignment effect.