Excitation functions for production of 46 Sc by deuteron and proton beams in nat Ti: A basis for additional monitor reactions

Hermanne, Alex; Tárkányi, F.; Takács, S.; Ditrói, F.; Amjed, N.

doi:10.1016/j.nimb.2014.07.026

Cited by 16 publications

(5 citation statements)

References 44 publications

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“…nat Cu(p,x) production cross sections for 65,63,62 Zn, 64,61,60 Cu, 60,57−55 Co, 59 Fe, 57,56 Ni, 56,54,52 Mn, 51,49,48 Cr, 48 V, and 47,46,44m Sc are given in Table III.…”

Section: Cross Section Determinationmentioning

confidence: 99%

“…As proposed in Fox et al [21], validation for the suggested parameter changes can be performed by applying the adjusted fit to reaction channels not included in the initial adjustment sensitivity studies in Section IV B. In this work, the validation channels 75 As(p,x) 72,70 As, 68,66 Ge, 72,66 Ga, 69m,65 Zn, 60,58,57,56 Co help test for cumulative cross section effects and far-from-target modeling stability. 75 As(p,p3n) 72 As is in fact independently measured here and meets many of the Fox et al [21] criteria to be included as a residual product channel in the initial parameter optimization.…”

Section: Parameter Adjustment Validationmentioning

confidence: 99%

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Measurement and modeling of proton-induced reactions on arsenic from 35 to 200 MeV

et al. 2021

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72 As is a promising positron emitter for diagnostic imaging that can be employed locally using a 72 Se generator. However, current reaction pathways to 72 Se have insufficient nuclear data for efficient production using regional 100-200 MeV high-intensity proton accelerators. In order to address this deficiency, stacked-target irradiations were performed at LBNL, LANL, and BNL to measure the production of the 72 Se/ 72 As PET generator system via 75 As(p,x) between 35 and 200 MeV. This work provides the most well-characterized excitation function for 75 As(p,4n) 72 Se starting from threshold. Additional focus was given to report the first measurements of 75 As(p,x) 68 Ge and bolster an already robust production capability for the highly valuable 68 Ge/ 68 Ga PET generator. Thick target yield comparisons with prior established formation routes to both generators are made. In total, high-energy proton-induced cross sections are reported for 55 measured residual products from 75 As, nat Cu, and nat Ti targets, where the latter two materials were present as monitor foils. These results were compared with literature data as well as the default theoretical calculations of the nuclear model codes TALYS, CoH, EMPIRE, and ALICE. Reaction modeling at these energies is typically unsatisfactory due to few prior published data and many interacting physics models. Therefore, a detailed assessment of the TALYS code was performed with simultaneous parameter adjustments applied according to a standardized procedure. Particular attention was paid to the formulation of the two-component exciton model in the transition between the compound and preequilibrium regions, with a linked investigation of level density models for nuclei off of stability and their impact on modeling predictive power. This paper merges experimental work and evaluation techniques for high-energy charged-particle isotope production in an extension to an earlier study of this kind.

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“…nat Cu(p,x) production cross sections for 65,63,62 Zn, 64,61,60 Cu, 60,57−55 Co, 59 Fe, 57,56 Ni, 56,54,52 Mn, 51,49,48 Cr, 48 V, and 47,46,44m Sc are given in Table III.…”

Section: Cross Section Determinationmentioning

confidence: 99%

Section: Parameter Adjustment Validationmentioning

confidence: 99%

Measurement and modeling of proton-induced reactions on arsenic from 35 to 200 MeV

et al. 2021

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“…Following the good decay characteristics of 46 Sc (T1/2 =83.79 d, decay modes: β -(100%); 889 keV (Iγ = 99.98), 1120.545 keV (Iγ = 99.99)), the radioisotope has been proposed as ideal in beam monitoring, just as the popularly known 48 V radioisotope [6]. Similarly, the excellent decay characteristics of 51 Cr and its fine shape of excitation function which make it useful in monitoring irradiations under alpha beams [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of target density uncertainties on extracted experimental cross sections for the ^natTi(α, x)⁵¹Cr,⁴⁶Sc reactions

2020

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The production optimization of medical radioisotopes for various applications requires careful analysis of all production parameters. The importance of such radioisotopes in nuclear medicine cannot be overemphasized. During cross section calculations, experimentalist sometimes find more than one reported literature value of a certain parameter, each leading to a different effect on the overall cross sections. In the present work, we considered the effect of slight variations of density values of titanium reported in the literature on the experimental cross sections. Several reported density values (4.50, 4.51 and 4.54 g/cm3) were found in the literature, but only the lowest and highest values (4.50 and 4.54 g/cm3) were considered in this study. The said densities were used to calculate the cross sections of Ti(a, x)51Cr,46Sc radioisotopes. The corresponding trends of the excitation functions of 51Cr and 46Sc were analyzed for the selected density values. The calculated cross sections from the different density values have been analyzed and compared graphically to show the level of variations, as well as comparison with theoretical TALYS code calculated cross sections. About 1 percent variation of the cross sections have been observed. Following the observed slight variation in cross sections effect of the various density values, we recommend that IAEA could update its nuclear data service database to include recommended density values for all metals using reliable sources.

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“…Targets of cerium dioxide with a thickness in range of mg/cm 2 deposited on titanium can be used to verify cross sections of production of 142 Pr whose values were reported to disagree at proton energies in the vicinity of 12 MeV [1,2]. Titanium has been used to precisely monitor the proton energy up to 30-40 MeV using the nat Ti(p,xn) 48 V nuclear reaction [4][5][6]. Thin layers of cerium dioxide (CeO 2 ) have been prepared by various methods such as electrodeposition [7][8][9], hydrothermal [10], ion beam-assisted deposition [11], laser chemical vapor deposition [12][13][14], microwave-assisted heating [15], precipitation [16,17], magnetron sputtering [18,19], and sol-gel [20] methods.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cerium Dioxide Layers on Titanium by Electrodeposition with Organic Solution

Nande

Kostyukova

Choi

et al. 2017

Journal of Nanomaterials

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Layers of cerium dioxide nanoparticles were prepared on titanium by electrodeposition with organic solution. Three concentrations of cerium ions were used at 31.6 V. The organic solution was isobutanol and titanium foils were used as anodes and cathodes. Currents were monitored during the electrodeposition. Deposition times ranged from 0.5 to 8 h. Deposited Deposited layers were calcined at 700 K for 30 min. The morphology and composition of the deposited layers were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). As-prepared and calcined deposition layers were assayed to be cerium dioxide. The average crystallite size increased from 4 to 7 nm through calcination at 700 K. Sizes of calcined cerium oxide agglomerates were ranging from 73 to 146 nm for 30 min deposition and 209 to 262 nm for 8 h deposition. The electrodeposition efficiencies of 0.5 h deposition at three concentrations were measured to be highest.

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Excitation functions for production of 46 Sc by deuteron and proton beams in nat Ti: A basis for additional monitor reactions

Cited by 16 publications

References 44 publications

Measurement and modeling of proton-induced reactions on arsenic from 35 to 200 MeV

Measurement and modeling of proton-induced reactions on arsenic from 35 to 200 MeV

Effect of target density uncertainties on extracted experimental cross sections for the ^natTi(α, x)⁵¹Cr,⁴⁶Sc reactions

Preparation of Cerium Dioxide Layers on Titanium by Electrodeposition with Organic Solution

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Excitation functions for production of 46 Sc by deuteron and proton beams in nat Ti: A basis for additional monitor reactions

Cited by 16 publications

References 44 publications

Measurement and modeling of proton-induced reactions on arsenic from 35 to 200 MeV

Measurement and modeling of proton-induced reactions on arsenic from 35 to 200 MeV

Effect of target density uncertainties on extracted experimental cross sections for the natTi(α, x)51Cr,46Sc reactions

Preparation of Cerium Dioxide Layers on Titanium by Electrodeposition with Organic Solution

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Effect of target density uncertainties on extracted experimental cross sections for the ^natTi(α, x)⁵¹Cr,⁴⁶Sc reactions