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Baluev, A.V.; Mityakhina, V.S.; Krasnikov, L.V.; Galkin, B.Ya.; Besnosyuk, V.I.
14th radiochemical conference. Booklet of abstracts2002
14th radiochemical conference. Booklet of abstracts2002
AbstractAbstract
[en] Currently, antimony-125 is produced by recovery from tin-124 irradiated by neutrons in nuclear reactors. The radionuclide builds up following the pathway: Sn-124 (n,γ) → Sn-125 (β-) (9.6 days) → Sb-125 ((β-) (2.77 years) The cross-section of the (n,γ) reaction is low (0.2 barn), therefore tin metal enriched with tin-124 is used. It should be noted that the use of an enriched target decreases the build-up of other radionuclides as compared to the natural mixture of tin isotopes. Published data showed that ion exchange on anion exchangers is one of the most promising procedures of recovery of antimony-125 from irradiated tin-124. We irradiated tin metal enriched with tin-124 (approximately 96%). After cooling and storage, the specific activity was 5 μCi per g of metal. The irradiated sample was dissolved in concentrated hydrochloric acid containing hydrogen peroxide or bromine in order to convert tin to the tetravalent state and antimony to the pentavalent state. We used tin-119m as a mark for an express gamma-spectrometric determination of the distribution coefficients. We studied the separation of Sb-125 and tin on strongly basic (Dowex-50 and AV-17), moderately basic (AN-2FN), and weakly basic (AN-31) ion exchangers. Hydrochloric acid, a mixture of hydrochloric and hydrobromic acids, and nitric acid were used as the elutriating agents. The samples from chromatography were subjected to gamma-spectrometric analysis using Si(Li) and Ge(Li) semiconductor detectors. In experiments examining the separation on strongly basic anion exchangers, the attained decontamination factor for removal of tin from antimony-125 was approximately 104-105 in one cycle. In the experiments devoted to the separation on moderately basic and weakly basic anion exchangers, tin was eluted before antimony-125. This should improve reasonably the regeneration of the enriched tin samples. The most interesting and significant results were obtained in the study of separation of antimony-125 and tin on the AN-31 weakly basic anion exchanger. Tin was eluted virtually completely from the column with 8-9 free volumes of 0.8M HCl. Antimony-125 remained on the column and could be eluted efficiently with 7-8 free volumes of aqueous nitric acid (1:10 v/v). The tin and antimony-125 yields were 99% and 98%, respectively, and the antimony-125 content of tin did not exceed 0.1% of the initial activity. This procedure was patented in Russia (RF Patent No. 2,003,094, 12 July 1991). (author)
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Czech Technical University, Prague (Czech Republic); Czech Chemical Society, Prague (Czech Republic); I.M. Marci Spectroscopic Society, Prague (Czech Republic); Czech Radioecological Society, Prague (Czech Republic); 423 p; ISBN 80-01-02530-6;
; Mar 2002; p. 225; 14. radiochemical conference; Marianske Lazne (Czech Republic); 14-19 Apr 2002

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Miscellaneous
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Conference
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ANTIMONY ISOTOPES, BEAMS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, EVEN-EVEN NUCLEI, HEAVY ION REACTIONS, INTERMEDIATE MASS NUCLEI, ISOTOPES, NUCLEAR REACTIONS, NUCLEI, NUCLEON BEAMS, ODD-EVEN NUCLEI, PARTICLE BEAMS, RADIOISOTOPES, SEPARATION PROCESSES, STABLE ISOTOPES, TARGETS, TIN ISOTOPES, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
[en] Separation of 125Sb from tin using highly basic, medium-basic, and weakly basic ion-exchangers was studied. The best results were obtained for AN-31 weakly basic anion exchanger. The yield of 125Sb was 95 -98 % of the initial activity, the yield of tin, 98 ± 0.5% of the initial amount. The separation coefficient is 106-107 for one cycle. A procedure based on ion exchange was developed. Extraction procedures of separation of 125Sb from tin were studied. Isoamyl alcohol, ethyl acetate, and di-n-butyl ether were used as extracting agents. The most efficient extracting agent is di-n-butyl ether. Carrier-free radiochemically pure sample of 125Sb was produced. More than 20 mCi of the target product was recovered. The extraction recovery procedure of 125Sb has been developed. (author)
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14. radiochemical conference; Marianske Lazne (Czech Republic); 14-19 Apr 2002; ISTC PROJECT 1306; 2 figs., 17 refs.; 2nd author's e-mail: mityakhina@atom.nw.ru
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Journal Article
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Czechoslovak Journal of Physics; ISSN 0011-4626;
; v. 53(suppl.A,pt.2); p. A417-A423

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ANTIMONY ISOTOPES, BEAMS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, EVEN-EVEN NUCLEI, HEAVY ION REACTIONS, INTERMEDIATE MASS NUCLEI, ISOTOPES, NUCLEAR REACTIONS, NUCLEI, NUCLEON BEAMS, ODD-EVEN NUCLEI, PARTICLE BEAMS, RADIOISOTOPES, SEPARATION PROCESSES, STABLE ISOTOPES, TARGETS, TIN ISOTOPES, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
[en] Within a microscopic transport model (Stochastic Mean Field) we analyze the collective flow properties associated to the intermediate mass fragments produced in nuclear fragmentation. We study the transverse and elliptic flow parameters for each rank in mass hierarchy. The results are plotted for 124Sn + 124Sn systems at an energy of 50AMeV and for an impact parameter b=4fm. The correlation with the dynamics of the isospin degree of freedom is also discussed and the results are presented for the same systems
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TIM 2012 physics conference; Timisoara (Romania); 27-30 Nov 2012; (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
[en] The symmetric system 112Sn+112Sn on the neutron poor side will be compared with the neutron rich system 124Sn+124Sn. The measurement of an incident energy of E/A=40 MeV was carried out with a nearly 4 π-coveraged for both, charged particles and neutrons. By varying the mass of this symmetric system without changing the charge we are able to address the isopin dependence of nuclear fragmentation. the correlation of the number emitted charged particles and the number of emitted neutrons will be presented. Impact parameter scales derived from different observables will be discussed. The comparison of the two systems in terms of fragment-production will be investigated
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Fall meeting of the Division of Nuclear Physics of the American Physical Society; Bloomington, IN (United States); 25-28 Oct 1995; CONF-9510116--
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[en] Using symmetric Sn112+Sn112, Sn124+Sn124 collisions as references, we probe isospin diffusion in peripheral asymmetric Sn112+Sn124, Sn124+Sn112 systems at an incident energy of E/A=50 MeV. Isoscaling analyses imply that the quasiprojectile and quasitarget in these collisions do not achieve isospin equilibrium, permitting an assessment of isospin transport rates. We find that comparisons between isospin sensitive experimental and theoretical observables, using suitably chosen scaled ratios, permit investigation of the density dependence of the asymmetry term of the nuclear equation of state
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(c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
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[en] We show that the new experimental data reported by Galaviz et al. [Phys. Rev. C 71, 065802 (2005)] can be used to improve a previous optical potential global parameter set, employing the corresponding former local parameter basis as well as the parameter sets obtained through a similar analysis of the new data
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(c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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[en] Mean lifetimes of five levels in the S band and three levels in the ground-state band of 156Dy, populated via the 124Sn(36S,4n) reaction at E=145 MeV, were measured by the Doppler-shift attenuation technique using a line-shape analysis. The differential decay-curve method was applied for a lifetime determination. In contrast with earlier data, the present B(E2) values in the yrast band do not indicate a reduction in the collectivity after the crossing between the S band and the ground-state band, and confirm the results of theoretical calculations using mean-field approaches
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(c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
No abstract available
Original Title
Untersuchung der Pygmydipolresonaz in 124Sn mit Hilfe der (α,α'γ) Reaktion
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2008 DPG spring meeting. Jointly spring meeting of the working group AMOP of the professional associations atomic physics, short time physics, mass spectrometry, molecule physics, plasma physics, quantum optics and photonics and the professional associations hadrons and cores, environmental physics; DPG Fruehjahrstagung 2008. Gemeinsame Fruehjahrstagung des Arbeitskreises AMOP mit den Fachverbaenden Atomphysik, Kurzzeitphysik, Massenspektrometrie, Molekuelphysik, Plasmaphysik, Quantenoptik und Photonik und den Fachverbaenden Hadronen und Kerne, Umweltphysik; Darmstadt (Germany); 10-14 Mar 2008; Also available online: http://www.dpg-tagungen.de/index_en.html; Session: HK 8.4 Mo 14:45
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Journal Article
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Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; CODEN VDPEAZ; v. 43(3); [1 p.]

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CHARGED PARTICLES, CHARGED-PARTICLE REACTIONS, ELECTROMAGNETIC RADIATION, ENERGY LEVELS, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, EXCITED STATES, INTERMEDIATE MASS NUCLEI, IONIZING RADIATIONS, ISOTOPES, MULTIPOLE TRANSITIONS, NUCLEAR REACTIONS, NUCLEI, RADIATIONS, SCATTERING, STABLE ISOTOPES, TARGETS, TIN ISOTOPES
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Kaur, Mandeep; Kaur, Kamaldeep; Kumar, Suneel, E-mail: mandeep062000@gmail.com
DAE-BRNS symposium on nuclear physics. V. 592014
DAE-BRNS symposium on nuclear physics. V. 592014
AbstractAbstract
[en] The study of nuclear stopping in the past few years makes it a topic of considerable interest. Nuclear stopping governs most of the dissipated energy during the collision of heavy ions. Thus it can provide important information about the nuclear equation of state under the extreme conditions of temperature, pressure and density. In the present study, nuclear stopping due to fragments is studied by analysing the phase space of fragments at different incident energies. The simulations are carried out by using the isospin-dependent quantum molecular dynamics (IQMD) model explained in the next section
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Nayak, Basanta K.; Thomas, Renju G.; Datar, Vivek M. (Nuclear Physics Div., Bhabha Atomic Research Centre, Mumbai (India)) (eds.); Board of Research in Nuclear Sciences, Department of Atomic Energy, Mumbai (India); [908 p.]; Dec 2014; p. 444-445; 59. DAE-BRNS symposium on nuclear physics; Varanasi (India); 8-12 Dec 2014; 3 refs., 1 fig.
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Book
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Bisplinghoff, J.; Blann, M.; David, P.; Ernst, J.; Mayer-Kuckuk, T.; Mignerey, A.; Scobel, W.
Nuclear reaction mechanisms. Progress report, June 1975--May 19761976
Nuclear reaction mechanisms. Progress report, June 1975--May 19761976
AbstractAbstract
[en] The elastic scattering of 35Cl on 27Al, 5862Ni, 116120124Sn and 141Pr has been measured at energies between 100 and 170 MeV. Interaction radii are extracted with the quarter point method. Comparisons with trend formulas for the interaction radii are presented. The consistency of these radii with fusion radii is discussed. Optical model analyses are being performed for these systems as well as analyses by the Fresnel scattering model of Brink and Rowley
Original Title
100 to 170 MeV
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Blann, M.; Rochester Univ., N.Y. (USA); p. 43-53; 1976
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Report
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Progress Report
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