The Isobaric-Analogue Resonance States in the Fe⁵⁶Nucleus

Abstract

Gamma ray spectra from the reaction Mn55(p, y ) Fe56 have been measured a t the isobaric-analogue resonances a t E , = 1769 3 4 keV and 1806 f 4 keV respectively with a 15 om3 Ge(Li) dedector. Double correlation for the transition from the resonance level t o the second excited state of Fe56 has been measured for the two cases. Proton elastic scattering was also studied a t each resonance a t the angle 150". Analysis of the ( p , y ) and ( p , p ) works yields a J" assignment 4' or 5 ' and 3+ for the two mentioned resonance states, respectively, which are the isobaric-analogues of the 0.454 MeV and 0.486 MeV states of MnS6. The proton partial width and the total width for each resonance state were also determined.

Isobaric Analogue State of the 0.211 MeV Level of Mn56 in Fe56

“…Ys8, 0.91 MeV and 1.85 MeV y-lines. 4. ALZ7(p, y)Siz8 at E, = 0,992 MeV giving mainly y-lines of 1.78 MeV, 5.…”

“…The elaslic scattering work was done in a special scattering chamber [3]. The experimental technique for the ( p , p ) work was described in details in a previous paper [4].…”