“…Recently Sousa et al (1975) and Gupta et al (1977a) have extended experimental studies of the nucleus 154Gd to 25 even-parity states lying below 2·3 MeV. As these states include three 0 +, seven 2 +, two 3 +, seven 4 +, two 5 + and four 6 + levels, they cannot all be fitted into the three rotation-vibration bands normally considered for even--even nuclei; namely (with spins restricted to I ~ 6) the g band (0+,2+,4+,6+), the p band (0+, 2+, 4 +, 6+) and the y band (2+, 3 +, 4+, 5+, 6+).…”