Investigation of the Reaction Mg²⁵(p, γ)Al²⁶

Abstract

The Mg 25 ( p , γ)Al 26 reaction was studied at the three resonances of 317, 392 and 437 kev proton energy. The level of Al 26 , corresponding to the third excited state (3.97 Mev) in Mg 26 , was found at 4.18±0.02 Mev. Through the angular distributions of γ-rays, spins and parities of this level and some other levels were assigned as follows: 3.16 Mev, J =2 + ; 4.18 Mev, J =3 + ; 6.61 Mev, J =3 - ; 6.68 Mev, J =2 + or 3 + ; 6.72 Mev, J =4 + or 4 - . The second and third excited states in Mg 26 were estimated to be J =2 + and J =3 + respectively. Excitation energies, the gamma decay scheme, and the radiation yield of the resonance levels are also given. The correspondence between levels of Mg 20 and Al 26 is discussed and a possible excited state configuration of Mg 26 is suggested.