6533b85afe1ef96bd12b944f

RESEARCH PRODUCT

Low-lying shears bands in very light odd—odd Bi isotopes

J. F. C. CocksK. J. EskolaK. HelariuttaPeter M. JonesPaivi NieminenO. DorvauxH. KankaanpääN. AmzalS. JuutinenM. MuikkuPaul GreenleesC. ScholeyP. RahkilaMatti LeinoPasi KuusiniemiJuha UusitaloR. JulinN. J. HammondT. LönnrothHeikki Kettunen

subject

CouplingPhysicsProtonSpins010308 nuclear & particles physicsNuclear TheoryParity (physics)01 natural sciencesSymmetry (physics)0103 physical sciencesNeutronAtomic physicsNuclear Experiment010306 general physicsSpin (physics)Excitation

description

The concept of magnetic rotation in nuclei was introduced to explain the observed regular bands with enhanced M1 transitions and weak or absent E2 crossover transitions in nearly spherical nuclei around 198Pb [1]. These bands can be described by the coupling of high-j proton and neutron configurations to a total spin tilted at an angle of ~ 45° with respect to the symmetry axis. As the proton and neutron spins align with increasing excitation energy, a sequence of ΔI = 1 levels of fixed parity (“shears band”) is formed [2].

https://doi.org/10.1007/978-3-642-55560-2_121