Z.Phys. A325, 127 (1986)

N.Redon, T.Ollivier, R.Beraud, A.Charvet, R.Duffait, A.Emsallem, J.Honkanen, M.Meyer, J.Genevey, A.Gizon, N.Idrissi

New Exotic Neutron-Deficient Nuclei near N = 82

NUCLEAR REACTIONS ¹¹²Sn, ¹⁰⁶Cd(³⁵Cl, X), E=190 MeV; ¹¹²Sn, ¹⁰⁶Cd(³²S, X), E=170 MeV; measured γ(K X-ray)-coin; deduced evidence for ¹³⁸Eu, ¹⁴¹Gd, ¹⁴³Tb, ¹⁴⁴Dy.

RADIOACTIVITY ¹³⁷Sm(β⁺) [from ¹⁰⁶Cd(³⁵Cl, X), E=190 MeV]; measured Eγ, Iγ, γ(X-ray)-coin; deduced T_1/2. ¹³⁷Pm deduced levels, γ-branching, possible J, π. ¹³⁸Eu(EC), (β⁺) [from ¹⁰⁶Cd(³⁵Cl, X), E=190 MeV]; measured γ(K X-ray)-coin; deduced level, T_1/2, J, π, log ft. ¹³⁸Sm deduced levels, J, π, γ-branching, band structure. ¹³⁹Eu [from ¹¹²Sn(³²S, X), E=170 MeV; ¹⁰⁶Cd(³⁵Cl, X), E=190 MeV]; measured Eγ, Iγ; deduced T_1/2, log ft. ¹³⁹Sm deduced levels, γ-branching, isomer T_1/2, J, π, decay characteristics. ¹⁴⁰Gd [from ¹¹²Sn(³²S, X), E=170 MeV]; measured γ(X-ray)-coin; deduced T_1/2. ¹⁴⁰Eu(β⁺), (EC) [from ¹⁴⁰Gd decay]; measured Eγ, Iγ; deduced T_1/2. ¹⁴⁰Sm deduced no 4⁺→2⁺ transition. ¹⁴¹Gd [from ¹¹²Sn(³²S, X)E, =170 MeV; ¹¹²Sn(³⁵Cl, X), E=190 MeV]; measured γ(X-ray)-coin; deduced T_1/2, possible J, π. ¹⁴¹Eu deduced levels, γ-branching, isomer decay characteristics. ¹⁴³Tb(EC), (β⁺) [from ¹¹²Sn(³⁵Cl, X), E=190 MeV]; measured γ(X-ray)-coin. ¹⁴³Gd deduced levels, J, π, γ-branching, ICC. ¹⁴⁴Dy [from ¹¹²Sn(³⁵Cl, X), E+190 MeV]; measured γ(X-ray)-coin; deduced T_1/2. ¹⁴⁴Tb deduced levels, γ-branching, J, π, isomer decay charateristics. ^144,144mTb(EC), (β⁺); measured γ-decay; deduced T_1/2 upper limit. ¹⁴⁴Gd deduced levels, J, π, γ-branching, γ-multipolarity, δ.

NUCLEAR STRUCTURE ^137,139Ce, ^139,141Nd, ^141,143Sm, ^143,145Gd; calculated levels. ^{138,140,142,144}Gd, ^{134,136,138,140,142}Sm, ^{128,130,132,134,136,138,140}Nd, ^{126,128,130,132,134,136,138}Ce; calculated (E(4⁺)/E(2⁺)). ^{138,140,142,144}Gd, ^{136,138,140,142}Sm, ^{134,136,138,140}Nd; analyzed 2⁺ level systematics. ¹³⁸Sm, ^136,138Nd; analyzed band structure.