(ALPHA, ALPHA' GAMMA) ANGULAR CORRELATION STUDIES OF SOME EXCITED STATES IN MG-24, MG-26, AND SI-28

A number of states in Si28, Mg26, and Mg24 have been studied using the (α,α′γ) reaction and the angular correlation method-II geometry of Litherland and Ferguson. In Si28, spin and parity assignments of 1, (6+), and 1- are made to the 7.38-, 8.51-, and 8.94-MeV states, respectively. The 4.90-MeV state in Mg26 is assigned Jπ=4+. Earlier Jπ assignments to the 3- 6.88-, 2+ 7.41-, and 2+ 7.93-MeV states in Si28, and the 1- 8.44-, 2+ 9.00-, and 1- 9.15-MeV states in Mg24 are confirmed, as is an earlier value of the multipolarity mixing ratio of the 2.94→1.81 γ-ray transition in Mg26. © 1969 The American Physical Society.