Gamma Radiation from Low Levels ofAl27

Abstract

The ${\mathrm{Al}}^{27}(\alpha , {\alpha }^{\prime }\gamma )$ reaction was investigated by using particle-gamma coincidence techniques and the 22-Mev alpha-particle beam from the Indiana University cyclotron. A 0.79±0.03 Mev gamma-ray transition between the 3.0- and 2.21-Mev states of ${\mathrm{Al}}^{27}$ was observed. This result, together with other data, suggests that the 3.0- and 2.21-Mev states are the $\frac{9}{2^{+}}$ and ${\frac{7}{2}}^{+}$ members of a $K=\frac{5}{2}$ rotational band.