Phys.Rev. C 97, 064319 (2018)

M.Spieker, S.Pascu, D.Bucurescu, T.M.Shneidman, T.Faestermann, R.Hertenberger, H.-F.Wirth, N.-V.Zamfir, A.Zilges

High-resolution (p, t) study of low-spin states in ²⁴⁰Pu: Octupole excitations, α clustering, and other structure features

NUCLEAR REACTIONS ²⁴²Pu(p, t), E=24 MeV; measured E(t), I(t), differential σ(θ), and total σ using the Q3D magnetic spectrograph of MLL-Munich. ²⁴⁰Pu; deduced levels, J, π, configurations, rotational band structure, moments of inertia of band members, origin of excited 0+ states, B(E1)/B(E2), summed B(E1) strength. Comparison with previous experimental values, and spdf IBM and α-cluster model theoretical predictions. Comparison of experimental σ(θ) values with coupled-channel distorted-wave Born approximation (DWBA) calculations with CHUCK3 code. ¹⁸⁶W, ²³²Th(p, t), E=24 MeV; measured E(t), I(t); deduced levels, used for calibration of levels in ²⁴⁰Pu.

NUCLEAR STRUCTURE ^238,240Pu, ^{226,228,230,232}Th, ^232,234,238U, ^224,226,228Ra; analyzed experimental excitation energy, B(E1), B(E2) and B(E3) values; deduced octupole correlations, effect of negative-parity single particle states and potential role of double-octupole or α-clustering states on enhanced B(E1).

doi: 10.1103/PhysRevC.97.064319