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At least 55 records · Page 3
All sourcesNASA NTRSDOE OSTI
DOE OSTI2025

Cross sections of 147–149 Sm( 6 Li,x) reactions for the production of 149 Tb for targeted alpha therapy

Terbium-149g (t 1/2 = 4.12 h) is of particular interest for targeted alpha therapy cancer treatment due to its ability to decay via both alpha and positron emission, making it a potential theranostic nuclide. Due to many challenges facing its production, there are limited facilities worldwide that have demonstrated the ability to produce this nuclide in quantities sufficient for medical research. Since the Cyclotron Institute at Texas A&M University is a specialized accelerator facility capable of accelerating a wide variety of ions, we are investigating production pathway options. One of the major challenges facing its production is the known co-production of the excited isomeric state, 149m Tb (t 1/2 = 4.1 min). However, this state does not decay to the ground state of 149g Tb, negating any potential contribution to its yield. Due to its short-half life, the cross section for the population of this state has never been measured. After calculating several potential reaction yields using predictive models, the reactions of 147–149 Sm( 6 Li,xn) 149 Tb were identified as candidates. Lithium-6 beams of varied energies between 45-65 MeV were impinged on enriched 147 Sm, 148 Sm, and 149 Sm targets at the Cyclotron Institute at Texas A&M University, and the reaction products were measured immediately following irradiation using high-purity germanium detectors, enabling detection of both 149m Tb and 149g Tb. Cross sections for all nuclides produced in sufficient activity in these reactions were also measured and reported here. We conclude that the population of 149m Tb is much preferred over population of the ground state for these 6 Li-induced reactions, and it is necessary to explore other options for 149g Tb production.

62 RADIOLOGY AND NUCLEAR MEDICINE↗
DOE OSTI2020

New transitions and levels for 163 Tb obtained from β-decay studies

Transitions in 163 Tb following β decay of 163 Gd were obtained as part of investigations of γ rays emitted following 163 Euβ decay to 163 Gd. In this work, detailed analysis of the low-energy structure of 163 Tb has been carried out with these data to expand previous β-decay studies and reactions studies of levels in 163 Tb. Data were collected at the LeRIBSS station of the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory with an array of four Clover HPGe detectors for γ rays and two plastic scintillators for β detection. The γ rays were identified as belonging to 163 Gd and 163 Tb via mass selection and γ-γ-β, γ-γ, or γ-x-ray coincidence. In total, 38 new γ-ray transitions were observed in 163 Tb from 15 newly identified levels and 12 previously identified levels. Potential energy surface calculations were performed which support a rigid prolate deformation. Previously identified unplaced transitions in 163 Tb have been placed within the level scheme of 163 Tb and additional states and transitions have been identified.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
DOE OSTI2020

Materials Data on Tb(FeB)2 by Materials Project

Tb(FeB)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to eight equivalent Fe and eight equivalent B atoms. All Tb–Fe bond lengths are 2.97 Å. All Tb–B bond lengths are 2.99 Å. Fe is bonded in a 4-coordinate geometry to four equivalent Tb and four equivalent B atoms. All Fe–B bond lengths are 2.00 Å. B is bonded in a 4-coordinate geometry to four equivalent Tb and four equivalent Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(Al2Fe)4 by Materials Project

TbFe4Al8 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 12-coordinate geometry to eight equivalent Fe and twelve Al atoms. All Tb–Fe bond lengths are 3.33 Å. There are four shorter (2.97 Å) and eight longer (3.17 Å) Tb–Al bond lengths. Fe is bonded to two equivalent Tb, two equivalent Fe, and eight Al atoms to form a mixture of distorted edge, face, and corner-sharing FeTb2Al8Fe2 cuboctahedra. Both Fe–Fe bond lengths are 2.51 Å. There are four shorter (2.53 Å) and four longer (2.63 Å) Fe–Al bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 5-coordinate geometry to one Tb, four equivalent Fe, and five Al atoms. There are a spread of Al–Al bond distances ranging from 2.72–2.80 Å. In the second Al site, Al is bonded in a 12-coordinate geometry to two equivalent Tb, four equivalent Fe, and six Al atoms. Both Al–Al bond lengths are 2.72 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(CuS)2 by Materials Project

Tb(CuS)2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Tb is bonded to six equivalent Cu and six equivalent S atoms to form distorted face-sharing TbCu6S6 cuboctahedra. All Tb–Cu bond lengths are 3.10 Å. All Tb–S bond lengths are 2.86 Å. Cu is bonded in a 4-coordinate geometry to three equivalent Tb and four equivalent S atoms. There are three shorter (2.31 Å) and one longer (2.55 Å) Cu–S bond lengths. S is bonded in a 7-coordinate geometry to three equivalent Tb and four equivalent Cu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(PPd)2 by Materials Project

Tb(PdP)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to eight equivalent Pd and eight equivalent P atoms. All Tb–Pd bond lengths are 3.22 Å. All Tb–P bond lengths are 3.10 Å. Pd is bonded to four equivalent Tb, four equivalent Pd, and four equivalent P atoms to form a mixture of distorted face, edge, and corner-sharing PdTb4P4Pd4 cuboctahedra. All Pd–Pd bond lengths are 2.90 Å. All Pd–P bond lengths are 2.47 Å. P is bonded in a 9-coordinate geometry to four equivalent Tb, four equivalent Pd, and one P atom. The P–P bond length is 2.20 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(Fe2Si)2 by Materials Project

Tb(Fe2Si)2 crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Tb is bonded in a 6-coordinate geometry to twelve equivalent Fe and six equivalent Si atoms. There are four shorter (3.11 Å) and eight longer (3.18 Å) Tb–Fe bond lengths. There are two shorter (2.83 Å) and four longer (2.89 Å) Tb–Si bond lengths. Fe is bonded in a 12-coordinate geometry to three equivalent Tb, six equivalent Fe, and three equivalent Si atoms. There are a spread of Fe–Fe bond distances ranging from 2.48–2.62 Å. There are one shorter (2.37 Å) and two longer (2.38 Å) Fe–Si bond lengths. Si is bonded in a 9-coordinate geometry to three equivalent Tb and six equivalent Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(Mg4Al3)4 by Materials Project

Tb(Mg4Al3)4 crystallizes in the cubic I-43m space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded in a 12-coordinate geometry to seven Mg and five equivalent Al atoms. There are a spread of Mg–Mg bond distances ranging from 3.03–3.17 Å. There are a spread of Mg–Al bond distances ranging from 2.86–3.18 Å. In the second Mg site, Mg is bonded in a 10-coordinate geometry to three equivalent Mg, one Tb, and six equivalent Al atoms. The Mg–Tb bond length is 3.28 Å. All Mg–Al bond lengths are 3.17 Å. Tb is bonded in a 12-coordinate geometry to four equivalent Mg and twelve equivalent Al atoms. All Tb–Al bond lengths are 3.23 Å. Al is bonded in a 11-coordinate geometry to seven Mg, one Tb, and three equivalent Al atoms. There are one shorter (2.72 Å) and two longer (2.78 Å) Al–Al bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(BRh)4 by Materials Project

Tb(RhB)4 crystallizes in the tetragonal P4_2/nmc space group. The structure is three-dimensional. Tb is bonded in a 12-coordinate geometry to twelve equivalent Rh and twelve equivalent B atoms. There are four shorter (2.97 Å) and eight longer (3.18 Å) Tb–Rh bond lengths. There are eight shorter (3.04 Å) and four longer (3.15 Å) Tb–B bond lengths. Rh is bonded in a 5-coordinate geometry to three equivalent Tb and five equivalent B atoms. There are a spread of Rh–B bond distances ranging from 2.22–2.25 Å. B is bonded in a 6-coordinate geometry to three equivalent Tb, five equivalent Rh, and one B atom. The B–B bond length is 1.81 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(BIr)2 by Materials Project

Tb(IrB)2 is alpha Pu-derived structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. Tb is bonded in a 2-coordinate geometry to eight equivalent Ir and ten equivalent B atoms. There are four shorter (3.06 Å) and four longer (3.22 Å) Tb–Ir bond lengths. There are a spread of Tb–B bond distances ranging from 2.99–3.35 Å. Ir is bonded in a 4-coordinate geometry to four equivalent Tb and four equivalent B atoms. There are two shorter (2.09 Å) and two longer (2.18 Å) Ir–B bond lengths. B is bonded in a 4-coordinate geometry to five equivalent Tb and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2023

Ultra-low concentration terbium (Tb) adsorption on garlic peels biosorbent and its application for $\mathrm{Nd}$-$\mathrm{Fe}$-$\mathrm{B}$ scraps recovery

Motivated by the strategic value of middle-heavy rare earth elements (MHREEs), we proposed a bio-adsorption method to recover ultra-low concentration terbium (Tb(Ⅲ)) from industrial wastewater that originated from the Nd-Fe-B scraps recovery process. It could be found that Tb(Ⅲ) ions as low as 5.34 ng·mL -1 (ppb) could be adsorbed onto Ca(Ⅱ)-modified garlic peels (Ca-GP) within 10 min with the adsorption efficiency of 99.2% at pH 3.5. The adsorption behavior of Tb(Ⅲ) onto Ca-GP conformed the Langmuir isotherm model and pseudo-second-order kinetic model. Attenuated total reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and density-functional theory (DFT) calculations results showed that Tb(Ⅲ) ions could be ion-exchanged with cations in Ca-GP such as Ca(Ⅱ) and -COOH. In application, column experiment results showed that the maximum bed adsorption capacity for Tb, praseodymium (Pr), neodymium (Nd), dysprosium (Dy), and Total rare earth elements (REEs) ions calculated by the Thomas model was 0.06, 3.50, 9.65, 7.34, and 27.37 µg·g -1 , respectively, with the initial concentration of 0.37 ng·mL -1 Tb, 20 ng·mL -1 Pr, 44 ng·mL -1 Nd, 67 ng·mL -1 Dy and 170 ng·mL -1 total REEs ions of actual solutions (below the solubility of rare-earth hydroxide). Here this manuscript thus provided a novel cost-effective and efficient approach to the enrichment and recovery of MHREEs from ultra-low concentration REEs ions-containing solutions.

54 ENVIRONMENTAL SCIENCES↗
DOE OSTI2021

Canted antiferromagnetic order and spin dynamics in the honeycomb-lattice compound Tb 2 Ir 3 Ga 9

Here, single-crystal neutron diffraction, inelastic neutron scattering, bulk magnetization measurements, and first-principles calculations are used to investigate the magnetic properties of the honeycomb lattice Tb 2 Ir 3 Ga 9 . While the R ln 2 magnetic contribution to the low-temperature entropy indicates a J eff = 1 / 2 moment for the lowest-energy crystal-field doublet, the Tb 3 + ions form a canted antiferromagnetic structure below 12.5 K. Due to the Dzyaloshinskii-Moriya interactions, the Tb moments in the a b plane are slightly canted towards b with a canted moment of 1.22 μ B per formula unit. A minimal x x z spin Hamiltonian is used to simultaneously fit the spin-wave frequencies along the high-symmetry directions and the field dependence of the magnetization along the three crystallographic axes. Long-range magnetic interactions for both in-plane and out-of-plane couplings up to the second nearest neighbors are needed to account for the observed static and dynamic properties. The z component of the exchange interactions between Tb moments is larger than the x and y components. This compound also exhibits bond-dependent exchange with negligible nearest-neighbor exchange coupling between moments parallel and perpendicular to the 4 f orbitals. Despite the J eff = 1 / 2 moments, the spin Hamiltonian is denominated by a large in-plane anisotropy K z ~ – 1 meV . DFT calculations confirm the antiferromagnetic ground state and the substantial interplane coupling at larger Tb-Tb distances.

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗
DOE OSTI2025

Production and purification of research scale 161 Tb using cation-exchange semi-preparative HPLC for radiopharmaceutical applications

Terbium-161 ( 161 Tb) is emerging as a promising radionuclide for cancer therapy due to its favorable nuclear properties that are similar to clinically established lutetium-177 ( 177 Lu) along with its therapeutic edge arising from the higher number of Auger and conversion electrons per decay. These low energy electrons result in higher cytotoxicity within a short range of the decaying nuclei to enhance therapeutic efficacy. Despite these promising characteristics, a significant challenge remains in the lack of a domestic 161 Tb supply in the United States, which poses an obstacle to the advancement of 161 Tb-based radiopharmaceutical research and development. Here, this study developed a reliable cation-exchange high-performance liquid chromatography-based method for purification of reactor-produced 161 Tb at quantities suitable to support research and preclinical studies. The purified 161 Tb product showed high radionuclidic purity with excellent radiochemical purity, and the successful labeling studies with the DOTA chelator and DOTA-TATE peptide demonstrated the effective incorporation of the purified 161 Tb into radiopharmaceuticals designed for targeted cancer therapy.

62 RADIOLOGY AND NUCLEAR MEDICINE↗
DOE OSTI2020

Materials Data on Tb(Zn10Fe)2 by Materials Project

Tb(FeZn10)2 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Tb is bonded in a 4-coordinate geometry to sixteen Zn atoms. There are four shorter (3.05 Å) and twelve longer (3.13 Å) Tb–Zn bond lengths. Fe is bonded to twelve Zn atoms to form FeZn12 cuboctahedra that share corners with six equivalent FeZn12 cuboctahedra, edges with eighteen equivalent ZnTbZn10Fe cuboctahedra, and faces with six equivalent ZnTbZn10Fe cuboctahedra. There are six shorter (2.49 Å) and six longer (2.70 Å) Fe–Zn bond lengths. There are three inequivalent Zn sites. In the first Zn site, Zn is bonded in a 2-coordinate geometry to two equivalent Fe and ten Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.64–2.76 Å. In the second Zn site, Zn is bonded in a distorted linear geometry to two equivalent Tb and twelve equivalent Zn atoms. All Zn–Zn bond lengths are 3.02 Å. In the third Zn site, Zn is bonded to one Tb, one Fe, and ten Zn atoms to form distorted ZnTbZn10Fe cuboctahedra that share corners with fifteen equivalent ZnTbZn10Fe cuboctahedra, edges with two equivalent ZnTbZn10Fe cuboctahedra, edges with three equivalent FeZn12 cuboctahedra, a faceface with one FeZn12 cuboctahedra, and faces with fifteen equivalent ZnTbZn10Fe cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.64–2.81 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(FeGe)2 by Materials Project

TbFe2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to eight equivalent Fe and eight equivalent Ge atoms. All Tb–Fe bond lengths are 3.33 Å. All Tb–Ge bond lengths are 3.07 Å. Fe is bonded to four equivalent Tb and four equivalent Ge atoms to form a mixture of distorted corner, edge, and face-sharing FeTb4Ge4 tetrahedra. All Fe–Ge bond lengths are 2.43 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Tb, four equivalent Fe, and one Ge atom. The Ge–Ge bond length is 2.53 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(GeRu)2 by Materials Project

TbRu2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to eight equivalent Ru and eight equivalent Ge atoms. All Tb–Ru bond lengths are 3.27 Å. All Tb–Ge bond lengths are 3.28 Å. Ru is bonded in a 4-coordinate geometry to four equivalent Tb and four equivalent Ge atoms. All Ru–Ge bond lengths are 2.44 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Tb, four equivalent Ru, and one Ge atom. The Ge–Ge bond length is 2.58 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(GeRh)2 by Materials Project

TbRh2Ge2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to eight equivalent Rh and eight equivalent Ge atoms. All Tb–Rh bond lengths are 3.33 Å. All Tb–Ge bond lengths are 3.19 Å. Rh is bonded to four equivalent Tb and four equivalent Ge atoms to form a mixture of distorted edge, face, and corner-sharing RhTb4Ge4 tetrahedra. All Rh–Ge bond lengths are 2.47 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Tb, four equivalent Rh, and one Ge atom. The Ge–Ge bond length is 2.53 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb(SiRh)2 by Materials Project

TbRh2Si2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Tb is bonded in a 8-coordinate geometry to eight equivalent Rh and eight equivalent Si atoms. All Tb–Rh bond lengths are 3.23 Å. All Tb–Si bond lengths are 3.13 Å. Rh is bonded to four equivalent Tb and four equivalent Si atoms to form a mixture of distorted edge, corner, and face-sharing RhTb4Si4 tetrahedra. All Rh–Si bond lengths are 2.41 Å. Si is bonded in a 9-coordinate geometry to four equivalent Tb, four equivalent Rh, and one Si atom. The Si–Si bond length is 2.44 Å.

36 MATERIALS SCIENCE↗