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Yennello S, McIntosh L, Burns J, Tereshatov E, Tabacaru G, McCann L, Schultz S, Lofton K, Abbott A, Avila G, Berko M, Engelthaler E, Hagel K, Hannaman A, Harvey B, Hood A, McCarthy M, McIntosh A, Sorensen M, Tobin Z, Vonder Haar A. Advances in 211At production at Texas A&M University. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125203002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Alpha emitting radionuclides with medically relevant half-lives are interesting for treatment of tumors and other diseases because they deposit large amounts of energy close to the location of the radioisotope. Researchers at the Cyclotron Institute at Texas A&M University are developing a program to produce 211At, an alpha emitter with a medically relevant half-life. The properties of 211At make it a great candidate for targeted alpha therapy for cancer due to its short half-life (7.2 h). Astatine-211 has now been produced multiple times and reliability of this process is being improved.
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Souliotis GA, Rodrigues MRD, Wang K, Iacob VE, Nica N, Roeder B, Tabacaru G, Yu M, Zanotti-Fregonara P, Bonasera A. A novel approach to medical radioisotope production using inverse kinematics: A successful production test of the theranostic radionuclide 67Cu. Appl Radiat Isot 2019; 149:89-95. [PMID: 31035108 DOI: 10.1016/j.apradiso.2019.04.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/31/2019] [Accepted: 04/16/2019] [Indexed: 11/28/2022]
Abstract
A novel method for the production of important medical radioisotopes has been developed. The approach is based on performing the nuclear reaction in inverse kinematics, namely sending a heavy-ion beam of appropriate energy on a light target (e.g. H, d, He) and collecting the isotope of interest. In this work, as a proof-of-concept, we studied the production of the theranostic radionuclide 67Cu (T1/2 = 62 h) via the reaction of a 70Zn beam at 15 MeV/nucleon with a hydrogen gas target. The 67Cu radionuclide alongside other coproduced isotopes, was collected after the gas target on an aluminum catcher foil and their radioactivity was measured by off-line γ-ray analysis. After 36 h post irradiation, apart from the product of interest 67Cu, the main radioimpurity coming from the 70Zn + p reaction was 69mZn (T1/2 = 13.8 h), which can be reduced by further radio-cooling. Moreover, along with the radionuclide of interest produced in inverse kinematics, the production of additional radioisotopes is possible by making use of the forward-focused neutrons from the reaction and allowing them to interact with a secondary target. A preliminary successful test of this concept was realized in the present study. The main requirement to obtain activities appropriate for preclinical studies is the development of high-intensity heavy-ion primary beams.
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Affiliation(s)
- G A Souliotis
- Laboratory of Physical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens, 15771, Greece.
| | - M R D Rodrigues
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA; Instituto de Física, Universidade de São Paulo, São Paulo, 05508-090, Brazil
| | - K Wang
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - V E Iacob
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - N Nica
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - B Roeder
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - G Tabacaru
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - M Yu
- Houston Methodist Research Institute, Houston, TX, 77030, USA
| | | | - A Bonasera
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA; Laboratori Nazionali del Sud, INFN, Catania, 95123, Italy
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Tabacaru G, May DP, Arje J, Chubarian G, Clark H, Kim GJ, Tribble RE. Production of rare isotope beams at the Texas A&M University Cyclotron Institute. Rev Sci Instrum 2012; 83:02A905. [PMID: 22380246 DOI: 10.1063/1.3663272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The Cyclotron Institute at Texas A&M is currently configuring a scheme for the production of radioactive-ion beams that incorporates a light-ion guide and a heavy-ion guide coupled with an electron-cyclotron-resonance ion source constructed for charge-breeding. This scheme is part of an upgrade to the facility and is intended to produce radioactive beams suitable for injection into the K500 superconducting cyclotron. The current status of the project and details on the ion sources used in the project is presented.
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Affiliation(s)
- G Tabacaru
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843-3366, USA.
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Melconian D, Triambak S, Bordeanu C, García A, Hardy JC, Iacob VE, Nica N, Park HI, Tabacaru G, Trache L, Towner IS, Tribble RE, Zhai Y. Experimental validation of the largest calculated isospin-symmetry-breaking effect in a superallowed Fermi decay. Phys Rev Lett 2011; 107:182301. [PMID: 22107626 DOI: 10.1103/physrevlett.107.182301] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Indexed: 05/31/2023]
Abstract
A precision measurement of the γ yields following the β decay of (32)Cl has determined its isobaric-analogue branch to be (22.47(-0.18)(+0.21))%. Since it is an almost pure-Fermi decay, we can also determine the amount of isospin-symmetry breaking in this superallowed transition. We find a very large value, δ(C) = 5.3(9)%, in agreement with a shell-model calculation. This result sets a benchmark for isospin-symmetry-breaking calculations and lends support for similarly calculated, yet smaller, corrections that are currently applied to 0+ → 0 + transitions for tests of the standard model.
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Affiliation(s)
- D Melconian
- Department of Physics, Texas A&M University, College Station, Texas 77843-4242, USA.
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May DP, Tabacaru G, Abegglen FP, Cornelius WD. First operation of the charge-breeder electron-cyclotron-resonance ion source at the Texas A&M Cyclotron Institute. Rev Sci Instrum 2010; 81:02A901. [PMID: 20192399 DOI: 10.1063/1.3273060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The 14.5 GHz electron-cyclotron-resonance ion source (ECRIS) designed and fabricated specifically for charge breeding has been installed at the Texas A&M University Cyclotron Institute for use in the institute's ongoing radioactive-ion-beam upgrade. The initial testing of the source has just begun with magnetic analysis of the ECRIS beam. The source has only been conditioning for a brief time at low microwave power, and it is continuing to improve. After the source has been conditioned and characterized, charge-breeding trials with stable beams from a singly ionizing source will begin.
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Affiliation(s)
- D P May
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA.
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Polf J, Roeder B, Peterson S, Tabacaru G, Beddar S, Trache L. WE-C-BRC-06: Determining Changes to Tissues Irradiated During Proton Treatment Delivery by Measuring Secondary Prompt Gamma-Ray Spectra. Med Phys 2009. [DOI: 10.1118/1.3182474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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La Cognata M, Spitaleri C, Mukhamedzhanov AM, Irgaziev B, Tribble RE, Banu A, Cherubini S, Coc A, Crucillà V, Goldberg VZ, Gulino M, Kiss GG, Lamia L, Mrazek J, Pizzone RG, Puglia SMR, Rapisarda GG, Romano S, Sergi ML, Tabacaru G, Trache L, Trzaska W, Tumino A. Measurement of the 20 and 90 keV resonances in the 18O(p,alpha)15N reaction via the Trojan horse method. Phys Rev Lett 2008; 101:152501. [PMID: 18999593 DOI: 10.1103/physrevlett.101.152501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2008] [Indexed: 05/27/2023]
Abstract
The 18O(p,alpha)15N reaction is of primary importance in several astrophysical scenarios, including fluorine nucleosynthesis inside asymptotic giant branch stars as well as oxygen and nitrogen isotopic ratios in meteorite grains. Thus the indirect measurement of the low energy region of the 18O(p,alpha)15N reaction has been performed to reduce the nuclear uncertainty on theoretical predictions. In particular the strength of the 20 and 90 keV resonances has been deduced and the change in the reaction rate evaluated.
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Affiliation(s)
- M La Cognata
- INFN Laboratori Nazionali del Sud & DMFCI Università di Catania, 95123 Catania, Italy
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Zhai Y, Trache L, Tribble R, Liu Y, Shi C, Papanikolaou N, Iacob V, Hardy J, Tabacaru G. SU-GG-T-240: New Method of An HPGe Detector Precise Efficiency Calibration with Experimental Measurements and Monte Carlo Simulations. Med Phys 2008. [DOI: 10.1118/1.2961992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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