The decay of 152Tb

doi:10.1016/0375-9474(67)90373-9

Nuclear Physics A

Volume 99, Issue 4, 10 July 1967, Pages 585-604

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Abstract

The conversion electron spectrum, electron-gamma and β⁺-gamma coincidence spectra are investigated, and the gamma-ray spectrum is studied in two Ge(Li) semiconductor spectrometers. A decay scheme $^{152} Tb →^{152} Gd$ is suggested, including many new levels among which two 0⁺ states at 1484.0 and 2720.7 keV.

Relative intensities at 0.2 : 0.3 : 1 are found for positon branches from ¹⁵²Tb to the 615.6 keV (0⁺), 344.4 keV (2⁺) and to the ground state of ¹⁵²Gd.

Spin 1⁻ is ascribed to the ground state of ¹⁵²Tb. Spin assignments are being made for the following excited levels: 755.6 keV 4⁺, 1109.8 keV 2⁺, 1123.8 keV 3⁻, 1606.1 keV 2⁺, 1643.9 keV 1⁻, 1862.3 keV 2⁺ and 1942.5 keV 2⁺.

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Cited by (17)

Determination of the Terbium-152 half-life from mass-separated samples from CERN-ISOLDE and assessment of the radionuclide purity
2023, Applied Radiation and Isotopes
Terbium-152 is one of four terbium radioisotopes that together form a potential theranostic toolbox for the personalised treatment of tumours. As ¹⁵² Tb decay by positron emission it can be utilised for diagnostics by positron emission tomography. For use in radiopharmaceuticals and for activity measurements by an activity calibrator a high radionuclide purity of the material and an accurate and precise knowledge of the half-life is required. Mass-separation and radiochemical purification provide a production route of high purity ¹⁵²Tb. In the current work, two mass-separated samples from the CERN-ISOLDE facility have been assayed at the National Physical Laboratory to investigate the radionuclide purity. These samples have been used to perform four measurements of the half-life by three independent techniques: high-purity germanium gamma-ray spectrometry, ionisation chamber measurements and liquid scintillation counting. From the four measurement campaigns a half-life of 17.8784(95) h has been determined. The reported half-life shows a significant difference to the currently evaluated half-life (ζ-score = 3.77), with a relative difference of 2.2 % and an order of magnitude improvement in the precision. This work also shows that under controlled conditions the combination of mass-separation and radiochemical separation can provide high-purity ¹⁵²Tb.
Nuclear Data Sheets for A = 152
2013, Nuclear Data Sheets
Detailed level schemes, decay schemes, and the experimental data on which they are based are presented for all nuclei with mass number A=152. The experimental data are evaluated; inconsistencies and discrepancies are noted; and adopted values for level and γ–ray energies, γ intensities, as well as for other nuclear properties are given. This evaluation replaces the A=152 evaluation published by Agda Artna–Cohen in Nuclear Data Sheets 79, 1 (1996) and the evaluation for 152Dy prepared by Balraj Singh and published in Nuclear Data Sheets 95, 995 (2002).
Nuclear data sheets for A = 152
1996, Nuclear Data Sheets
Abstract:Nuclear structure data on A = 152 have been compiled and evaluated. Results from reaction and decay studies are presented together with adopted level and transition properties. This evaluation replaces “Nuclear Data Sheets for A = 152” published in vol. 58, p. 93 (1989).Cutoff Data:All data available prior to July 1996 have been included in the evaluation.General Policies and Organization of Material:See the January issue of Nuclear Data Sheets.Acknowledgments:The evaluator wishes to express her gratitude to the US Department of Energy for providing support for this effort. The advice and assistance of the members of the Nuclear Data Project (Oak Ridge National Laboratory) and National Nuclear Data Center (Brookhaven National Laboratory) are gratefully acknowledged. The evaluator is also indebted to the editors and reviewers of the Nuclear Data Sheets for their critical review of this manuscript.General Comments:The policies and conventions set out in the introductory pages of this journal have been followed. Any exceptions to this have been noted in the text.
Nuclear data sheets for A = 152
1989, Nuclear Data Sheets
Nuclear data sheets for A = 152
1980, Nuclear Data Sheets
Multipole mixing ratios of electromagnetic transitions in <sup>152</sup>Gd
1972, Nuclear Physics, Section A
Using γ-γ(θ), γ(θ) (nuclear orientation) and e_k-γ(θ) directional correlation techniques, we have determined the multipole character of some transitions connecting the quadrupole and octupole quasi-vibrational bands to the ground state quasi-rotational band in ¹⁵²Gd following the decay of ¹⁵²Tb. For the γ-γ directional correlation measurements a high-energy resolution system employing a Ge(Li) and a NaI(Tl) detector was used while for the e_k-γ correlation we used a NaI(Tl) and magnetic lens spectrometer system. The nuclear orientation measurements were carried out at low temperatures obtained with a ³He-⁴He dilution refrigerator. The results show that the 2⁺ → 2⁺ transition between the β-vibrational and the ground state bands contains ≈ 10% Ml admixture, δ = − 3.05 ± 0.14, and a large E0 contribution while the similar transition from the γ-vibrational band has δ = 4.3 ± 0.7. These results are compared with Kumar's predictions for similar transitions in ¹⁵²Sm. Three other mixing ratios were also determined.

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The decay of 152Tb

Abstract

Nuclear Physics

Nucl. Instr.

Nuclear Physics

Nuclear Physics

Nuclear Physics

Phys. Rev.

Yad. Fiz.

Mat. Fys. Medd. Dan. Vid. Selsk.

preprint E2494

The decay of ¹⁵²Tb