Phys.Rev. C 107, 014620 (2023)

B.Longfellow, A.Gade, D.Bazin, P.C.Bender, M.Bowry, B.A.Brown, B.Elman, E.Lunderberg, D.Rhodes, M.Spieker, D.Weisshaar, S.J.Williams

Relative population of states in ²¹Mg from few-nucleon removal reactions

NUCLEAR REACTIONS ⁹Be(²⁴Mg, X)²¹Mg, E=95 MeV/nucleon; ⁹Be(²⁵Al, )²¹Mg, E=102 MeV/nucleon; ⁹Be(²⁶Si, X)²¹Mg, E=95 MeV/nucleon; measured Eγ, Iγ, γγ-coin; deduced parallel momentum distribution of the ²¹Mg reaction product, correlation between the ratio of the population of levels in ²¹Mg produced from ²⁶Si to the population of levels in ²¹Mg produced from ²⁵Al. ⁹Be(²⁴Mg, X)²¹Mg, E=95 MeV/nucleon; deduced σ for three-neutron removal. ²¹Mg; deduced levels, J, π, γ-ray transition relative intensities. ⁹Be(²⁵Al, X)²²Mg, E=67 MeV/nucleon; ⁹Be(²⁶Si, X)²²Mg, E=72 MeV/nucleon; analyzed experimental Eγ, Iγ, from 2008GA10 Phys.Rev. C 77, 044306; deduced parallel momentum distributions for ²²Mg reaction product, ratio of the population of levels in ²²Mg produced from ²⁶Si to the population of levels in ²²Mg produced from ²⁵Al as function of the spin. Observed unexpected strong correlation between the relative population of the states in ²¹Mg and the spin of the populated level in reactions caused be ²⁵Al and ²⁶Si. Comparison to shell-model calculations using the USDB Hamiltonian. CAESium-iodide scintillator ARray (CAESAR) consisting of 192 CsI(Na) scintillators and S800 magnetic spectrograph at Coupled Cyclotron Facility (NSCL).

doi: 10.1103/PhysRevC.107.014620