Sandra Siri | CNEA - Academia.edu (original) (raw)

Papers by Sandra Siri

Research paper thumbnail of The production of no carrier added arsenic radioisotopes in nuclear reactors

Journal of Radioanalytical and Nuclear Chemistry, 2018

The comparative advantages and drawbacks of some reactor-produced arsenic radioisotopes having fa... more The comparative advantages and drawbacks of some reactor-produced arsenic radioisotopes having favourable characteristics for their use as tracers are discussed. The study comprises their preparation based on: (a) capture reactions on germanium; (b) threshold reactions on germanium, selenium and bromine; (c) secondary reactions on germanium, induced by recoil protons and tritons produced by the action of neutrons on lithium. The recommended options for the production of relatively short half-life radionuclides are 77 As by capture on germanium or 76 As via (n,α) reaction on bromine, while two different ways are applicable for the production of 74 As, longer-lived radioisotope.

Research paper thumbnail of A Survey of New Methods for Production of Some Radionuclides, at Laboratory Scale, through Secondary Reactions in Nuclear Reactors

The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) re... more The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) reactions of interest in nuclear reactors are described. Experimental evidences of the observations of the reactions: 46 Ti(t,n) 48 V, 48 Ti(p,n) 48 V, 52 Cr(t,n) 54 Mn, 56 Fe(p,n) 56 Co, 72 Ge(t,n) 74 As and 74 Ge(p,n) 74 As, are presented. Additional data on some secondary reactions, already characterised for the production of 7 Be, 56 Co, 58 Co, 65 Zn and 88 Y, were also obtained. The significance of these data is discussed.

Research paper thumbnail of Production of 48V in a nuclear reactor via secondary tritons

Radiochimica Acta, 2009

Abstract The production of 48V in a nuclear reactor, induced on titanium by tritons generated fro... more Abstract The production of 48V in a nuclear reactor, induced on titanium by tritons generated from the 6Li (n, t) 4He reaction, and eventually 7Li (n, n't) 4He, is described. Samples of lithium titanate were irradiated for an irradiation cycle (120 h) in the RA-3 reactor, ...

Research paper thumbnail of Production of fission 131I

Journal of Radioanalytical and Nuclear Chemistry, 2005

Summary A method of iodine separation from other radionuclides generated by 235U fission has bee... more Summary A method of iodine separation from other radionuclides generated by 235U fission has been developed in order to explore the possibilities to obtain 131I as by-product of the 99Mo routine production in the Ezeiza Atomic Centre. The experiments were designed to remove this element to gas phase, and the recoveries were investigated both with and without carrier addition. High volatilization

Research paper thumbnail of A Survey of New Methods for Production of Some Radionuclides, at Laboratory Scale, through Secondary Reactions in Nuclear Reactors

The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) re... more The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) reactions of interest in nuclear reactors are described. Experimental evidences of the observations of the reactions: 46 Ti(t,n) 48 V, 48 Ti(p,n) 48 V, 52 Cr(t,n) 54 Mn, 56 Fe(p,n) 56 Co, 72 Ge(t,n) 74 As and 74 Ge(p,n) 74 As, are presented. Additional data on some secondary reactions, already characterised for the production of 7 Be, 56 Co, 58 Co, 65 Zn and 88 Y, were also obtained. The significance of these data is discussed.

Research paper thumbnail of The production of no carrier added arsenic radioisotopes in nuclear reactors

Journal of Radioanalytical and Nuclear Chemistry, 2018

The comparative advantages and drawbacks of some reactor-produced arsenic radioisotopes having fa... more The comparative advantages and drawbacks of some reactor-produced arsenic radioisotopes having favourable characteristics for their use as tracers are discussed. The study comprises their preparation based on: (a) capture reactions on germanium; (b) threshold reactions on germanium, selenium and bromine; (c) secondary reactions on germanium, induced by recoil protons and tritons produced by the action of neutrons on lithium. The recommended options for the production of relatively short half-life radionuclides are 77 As by capture on germanium or 76 As via (n,α) reaction on bromine, while two different ways are applicable for the production of 74 As, longer-lived radioisotope.

Research paper thumbnail of A Survey of New Methods for Production of Some Radionuclides, at Laboratory Scale, through Secondary Reactions in Nuclear Reactors

The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) re... more The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) reactions of interest in nuclear reactors are described. Experimental evidences of the observations of the reactions: 46 Ti(t,n) 48 V, 48 Ti(p,n) 48 V, 52 Cr(t,n) 54 Mn, 56 Fe(p,n) 56 Co, 72 Ge(t,n) 74 As and 74 Ge(p,n) 74 As, are presented. Additional data on some secondary reactions, already characterised for the production of 7 Be, 56 Co, 58 Co, 65 Zn and 88 Y, were also obtained. The significance of these data is discussed.

Research paper thumbnail of Production of 48V in a nuclear reactor via secondary tritons

Radiochimica Acta, 2009

Abstract The production of 48V in a nuclear reactor, induced on titanium by tritons generated fro... more Abstract The production of 48V in a nuclear reactor, induced on titanium by tritons generated from the 6Li (n, t) 4He reaction, and eventually 7Li (n, n't) 4He, is described. Samples of lithium titanate were irradiated for an irradiation cycle (120 h) in the RA-3 reactor, ...

Research paper thumbnail of Production of fission 131I

Journal of Radioanalytical and Nuclear Chemistry, 2005

Summary A method of iodine separation from other radionuclides generated by 235U fission has bee... more Summary A method of iodine separation from other radionuclides generated by 235U fission has been developed in order to explore the possibilities to obtain 131I as by-product of the 99Mo routine production in the Ezeiza Atomic Centre. The experiments were designed to remove this element to gas phase, and the recoveries were investigated both with and without carrier addition. High volatilization

Research paper thumbnail of A Survey of New Methods for Production of Some Radionuclides, at Laboratory Scale, through Secondary Reactions in Nuclear Reactors

The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) re... more The studies performed in the frame of a project destined for the search of new (t,n) and (p,n) reactions of interest in nuclear reactors are described. Experimental evidences of the observations of the reactions: 46 Ti(t,n) 48 V, 48 Ti(p,n) 48 V, 52 Cr(t,n) 54 Mn, 56 Fe(p,n) 56 Co, 72 Ge(t,n) 74 As and 74 Ge(p,n) 74 As, are presented. Additional data on some secondary reactions, already characterised for the production of 7 Be, 56 Co, 58 Co, 65 Zn and 88 Y, were also obtained. The significance of these data is discussed.