1970To07: ²²²Th produced and identified in ²⁰⁸Pb(¹⁶O,2n), E(¹⁶O)=10.6 MeV/nucleon at the Yale accelerator facility; measured α-decay and half-life.

1970Va13: ²²²Th produced and identified in ²⁰⁸Pb(¹⁸O,4n); ²⁰⁸Pb(²⁰Ne,α2n); ²⁰⁸Pb(²²Ne,α4n); ²⁰⁹Bi(¹⁹F,α2n); E=10.3 MeV/nucleon from Berkeley HILAC facility; measured α-decay and half-life.

Later studies of ²²²Th decay: 1991AnZZ, 1999Ho28, 2000He17, 2001Ku07, 2005Li17, 2016Pa28, 2018Mi11.

Theoretical nuclear structure calculations:

2022Ja07: calculated fragmentation potentials and preformation probabilities as functions of mass and charge distributions, fission σ(E) using dynamical cluster-decay model (DCM), including quadrupole β₂ and octupole β₃ deformations of fission fragments.

2020Ca18: calculated deformation parameters β₂, β₃, octupole deformation energies, proton moments Q₂₀ and Q₃₀ for octupole-deformed nuclei using Skyrme energy density functionals, and covariant energy density functionals.

2020No13: calculated potential energy surface in (β₂,β₃) plane, energies of yrast positive-parity and negative-parity states, energy splitting between positive- and negative-parity yrast bands, B(E1), B(E2), B(E3), transition quadrupole and octupole moments using interacting boson model (IBM).

2018Ah03: calculated levels, Jπ, bands using IBM-1, Bohr-Mottelson, and IVBM models.

2018Ry04: calculated deformation energy relative to (β₂₀,β₃₀) plane, quadrupole and octupole deformation of the mean-field minimum, excitation energies of rotational states using cranked HFB approach; deduced sudden change in configuration and shape of the observed yrast states from large octupole deformation at low spin to small octupole deformation at high spin.

2017Xi15: calculated levels, Jπ, B(E1), B(E2), B(E3), electric dipole moments, deformation energy surface in (β₂,β₃) plane, states of reflection-asymmetric nuclei using microscopic quadrupole-octupole collective Hamiltonian (QOCH) based on relativistic α(p)-PK1 energy density functionals.

2017Ne02: calculated potential energy surface, deformation, g.s. and superdeformed quadrupole moments using Fourier shape parameterization.

2013No07: calculated levels, Jπ, bands, potential energy surfaces, B(E2), B(E1) using microscopic framework based on nuclear density functional theory.

2008Fr03: calculated energy differences between positive and negative parity yrast sequences, and energies of aligned octupole multiphonon bands for heart-shaped nuclei.

2005Bo18: calculated g.s. and vibrational bands, level energies, B(E1), B(E2), shape transitions using analytic quadrupole octupole axially symmetric model.

2000Bo34: calculated octupole bands transition energies, beat patterns using algebraic models.

1995Jo11: calculated alternating-parity ground state bands level energies, octupole correlations, rotational spectra.

1989Eg02: calculated octupole barrier energies, pairing energy, deformations using microscopic model.

1987Na10: calculated levels, Jπ, routhians, rotational bands, shapes, B(E1)/B(E2) ratios using the cranking model.

1986Le05: calculated B(E1)/B(E2) branching ratio, shell effects on collective E1 excitations, adiabatic isovector and isoscalar deformations.

1984Fr06: calculated quasiparticle routhians for pear-shaped rotating nuclei, octupole-quadrupole deformed axial Woods-Saxon potential.

1984Na08: calculated β₂, β₃ deformation parameters using Woods-Saxon-Bogolyubov cranking theory.

Other theoretical calculations: 73 primary references for structure, and 75 for decay modes (α, ¹⁴C and clusters, SF) retrieved from the NSR database are listed as ’document’ records in this dataset.

Levels: The Kπ=0⁺ g.s. band and the Kπ=0- band at 246 keV have been interpreted as octupole parity-doublet bands.

Levels: Additional high-spin levels, decaying by a single transition each, with no Jπ assignments, are proposed only by 1988ScZF at 1477.2, 1502.4, 1541.4, 1593.3, 1612.6, 1774.6, 1906.2, 1926.2, 1935.2, 2035.8, 2304.8, 2312.6 and 2404.0 keV. These are not listed in this dataset, as evaluators consider these as unconfirmed, but can be found in the ²⁰⁸Pb(¹⁸O,4nγ) dataset.

Q-value: Q(ε)=581 11, S(2n)=13629 17, S(2p)=7647 13 (2021Wa16)