Three years of cross-section measurements of (n,xn) threshold reactions at TSL Uppsala and NPI Řež O. Svoboda, A. Krása, A. Kugler, M. Majerle, J. Vrzalová,

Slides:

Advertisements

Similar presentations

Determination of experimental cross-sections by activation method

Advertisements

Experimental Determination of Neutron Cross Sections of Yttrium by Activation Method by Barbara Geier Supervisors: Assoc. Prof Dr. Wolfgang Sprengel RNDr.

Setup for large area low-fluence irradiations with quasi-monoenergetic 0.1−5 MeV light ions M. Laitinen 1, T. Sajavaara 1, M. Santala 2 and Harry J. Whitlow.

Joint IAEA-ICTP Workshop on Nuclear Reaction Data for Advanced Reactor Technologies Student’s presentation Calculation of correction factors for neutron.

Measurements of cross-sections of neutron threshold reactions and their usage in high energy neutron measurements Ondřej Svoboda Nuclear Physics Institute,

Studies of ADS by means of JINR Nuclotron Martin Suchopár Nuclear Physics Institute, Academy of Sciences of the Czech Republic Department of Nuclear Reactors,

Data processing in the Activation technique experiment. Making stacked or sandwiched in the repeated order of Al-Cu-Mo. Irradiation of the samples Using.

Page 1 Cross-sections of Neutron Threshold Reactions studied by activation method Anne Larédo Supervisor: Dr. Vladimír Wagner Nuclear Physics Institute,

1 MCNP simulation of salt channel in LR-0 reactor 12th session of the AER Working Group F - "Spent Fuel Transmutations" and 3rd meeting of INPRO Project.

Some fission yields for 235U (n,f), 239Pu (n,f), 238U (n,f) reactions in ΣΣ neutron spectrum Dr. Cristina Garlea National Institute for R&D of Physics.

Cross-section studies of important neutron and relativistic deuteron reactions Vladimír Wagner Nuclear physics institute of CAS, Řež, Czech Republic,

Ion Beam Analysis Dolly Langa Physics Department, University of Pretoria, South Africa Blane Lomberg Physics Department, University of the Western Cape,

Future usage of quasi-infinite depleted uranium target (BURAN) for benchmark studies Pavel Tichý Future usage of quasi-infinite depleted uranium target.

Nuclear Data Activities at PTB

European Physical Society 19 th Nuclear Physics Divisional Conference New Trends in Nuclear Physics Applications and Technology Pavia (Italy) September.

Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft Association FZK-Euratom Status of Neutronics Tools & Data for IFMIF-EVEDA U. Fischer, S. Simakov.

Studies of neutron cross-sections by activation method in Nuclear Physics Institute Řež and in The Svedberg Laboratory Uppsala and experimental determination.

If the Coordinates system is. R r b (impact parameter.

Experimental studies of spatial distribution of neutron production around thick lead target irradiated by 0.9 GeV protons Antonín Krása&Vladimír Wagner.

Studies of Deuteron and Neutron Cross-sections Important for ADS Research Vladimír Wagner Nuclear physics institute of CAS, Řež, Czech Republic,

Simulations on “Energy plus Transmutation” setup, 1.5 GeV Mitja Majerle

Systematic studies of neutrons produced in the Pb/U assembly irradiated by relativistic protons and deuterons. Vladimír Wagner Nuclear physics institute.

Cross-sections of Neutron Threshold Reactions Studied by Activation Method Nuclear Physics Institute, Academy of Sciences of Czech Republic Department.

Production & Measurement of Thermal Neutron at RCNP Chhom Sakborey Nguyen Thi Duyen An Tran Hoai Nam Li Chunjuan Wang Mian.

Measurement of fragment mass yields in neutron-induced fission of 232 Th and 238 U at 33, 45 and 60 MeV V.D. Simutkin 1, I.V. Ryzhov 2, G.A. Tutin 2, M.S.

Neutron production study with the thick lead target and uranium blanket irradiated by 1.5 GeV protons Filip Křížek, ÚJF AV ČR.

Studies of Helium proportional counters response on fast neutrons, at NCSR “Demokritos” M. Zamani, M. Manolopoulou, S. Stoulos, M. Fragopoulou School of.

Experimental Studies of Spatial Distributions of Neutrons Produced by Set-ups with Thick Lead Target Irradiated by Relativistic Protons Vladimír Wagner.

V. Jakovlev, L. Lebedev and L. Solin V.G. Khlopin Radium Institute

The concept of compound nuclear reaction: a+B  C  d+F The particle transmission coefficients T are usually known from cross sections of inverse reactions.

Ondřej Svoboda Nuclear Physics Institute, Academy of Sciences of Czech Republic Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical.

Neutron Capture Cross Sections from 1 MeV to 2 MeV by Activation Measurements Korea Institutes of Geoscience and Mineral Resource G.D.Kim, T.K.Yang, Y.S.Kim,

Mitja Majerle for the “Energy Plus Transmutation” collaboration.

M. Štefánik *), P. Bém, M. Honusek, K. Katovský, M. Majerle, J. Novák, and E. Šimečková AER Working Group F – „Spent Fuel Transmutation“ and INPRO IAEA.

ANITA workshop, Uppsala, december 2008 ANITA neutron source Monte Carlo simulations and comparison with experimental data Mitja Majerle Nuclear Physics.

Ondřej Svoboda Nuclear Physics Institute, Academy of Sciences of Czech Republic Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical.

Neutron production in Pb/U assembly irradiated by deuterons at 1.6 and 2.52 GeV Ondřej Svoboda Nuclear Physics Institute, Academy of Sciences of Czech.

Simulations on “Energy plus Transmutation” setup, 1.5 GeV Mitja Majerle, V Wagner, A Krása, F Křížek This document can be downloaded.

Neutron production in Pb/U assembly irradiated by 1.26 AGeV deuterons. First experimental results Ondřej Svoboda Neutron production in Pb/U assembly irradiated.

9 th session of the AER Working Group “f “ - Spent Fuel Transmutations Simulations of experimental “ADS” Mitja Majerle, Gael de Cargouet Nuclear Physics.

4th International Summer School « Nuclear Physics Methods and Accelerators in Biology and Medicine » Monte-Carlo simulations : FLUKA vs. MCNPX Maxime ODEN.

KIT – The Research University in the Helmholtz Association INSTITUTE for NEUTRON PHYSICS and REACTOR TECHNOLOGY (INR) Nuclear Data for Calculation.

Summer Student Practice, 2007, JINR Dubna 1 Corelative Gamma Spectroscopy of Neutron-Nucleus Interactions Using the COCOS Setup Students: Jan Žemlička,

Nuclear Physics Institute Řež Fast neutron generators at NPI Řež M. Majerle P. Bém J. Novák E. Šimečková M. Štefánik.

Neutron production and iodide transmutation studies using intensive beam of Dubna Phasotron Mitja Majerle Nuclear Physics Institute of CAS Řež, Czech republic.

“Energy & Transmutation of Radioactive Waste“ collaboration workshop Řež, from June 4 up to June 8 1 Nuclear Physics Institute Řež Methodical comments.

1 Alushta 2016 CROSS SECTION OF THE 66 Zn(n,α) 63 Ni REACTION at CROSS SECTION OF THE 66 Zn(n, α) 63 Ni REACTION at E n = 4.0, 5.0 and 6.0 MeV I. Chuprakov,

High Energy Neutron and Proton Irradiation Facilities at TSL Alexander Prokofiev, , 6th LHC Radiation Workshop 1.

Comparison of neutron production on lead-uranium setup irradiated by protons and deuterons with different energies Ondřej Svoboda Nuclear Physics Institute,

Transmutation of 129 I with high energy neutrons produced in spallation reactions induced by protons in massive target V.HENZL Nuclear Physics Institute.

Studies of (n,xn) reaction cross-sections and also cross-sections of relativistic deuteron reactions obtained by the activation method Vladimír Wagner.

Monte Carlo methods in spallation experiments Defense of the phD thesis Mitja Majerle “Phasotron” and “Energy Plus Transmutation” setups (schematic drawings)

Investigation of the proton-induced reactions on natural molybdenum.

IBD Detection Efficiencies and Uncertainties

Transmutation of spent nuclear fuel

GEANT4 Simulations of a Beam Shaping Assembly Design and Optimization for Thermal/Epithermal Neutrons Vahagn Ivanyan Yerevan Physics Institute, Armenia.

at TSL high energy neutron facility

Cross-section Measurements of (n,xn) Threshold Reactions

n_TOF annual meeting December 2011, Lisbon

Transmutation of 129I with high energy neutrons produced in spallation reactions induced by protons in massive target V. HENZL1,*, D. HENZLOVA1, A. KUGLER1,

for collaboration “Energy plus transmutation”

Mitja Majerle NPI CAS Řež, The Czech Republic

The experiment on JINR Dubna Nuclotron

Mitja Majerle NPI CAS Řež, Czech Republic

Seminární soustředění společného doktorského projektu UTEF ČVUT Praha a ÚJF AVČR Řež Transmutation studies on JINR Dubna Phasotron Mitja Majerle.

Performed experiments Nuclotron – set up ENERGY PLUS TRANSMUTATION

Neutron production in Pb/U assembly irradiated by p+, d+ at 0. 7 – 2

LAHET code simulations in comparison with bare Pb spallation target experiment Daniela Henzlova.

O. Svoboda, A. Krása, A. Kugler, M. Majerle, J. Vrzalová, V. Wagner

The need for cross section measurements for neutron-induced reactions

Presentation transcript:

Three years of cross-section measurements of (n,xn) threshold reactions at TSL Uppsala and NPI Řež O. Svoboda, A. Krása, A. Kugler, M. Majerle, J. Vrzalová, V. Wagner EFNUDAT Workshop Nuclear Physics Institute, Academy of Sciences of the Czech Republic Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague

2 Outline Motivation  measurement TSL Uppsala NPI Řež Evaluation Results Conclusion Motivation for cross-section measurements Requirements for cross-section measurements TSL Uppsala facility NPI Řež facility Evaluation and neutron background subtraction Results - Comparison with EXFOR and TALYS Conclusion

3 Motivation for  measurements – Energy plus Transmutation project JINR Dubna, Russia Motivation E+T (n,xn) reactions E+T results (n,xn) in EXFOR  measurement TSL Uppsala NPI Řež Evaluation Results Conclusion

4 (n,xn) threshold reactions AlAuBiCoIn Ta Reaction E thresh [MeV] Half-life 197 Au (n,2n) 196 Au d 197 Au (n,3n) 195 Au d 197 Au (n,4n) 194 Au h 197 Au (n,5n) 193 Au h 197 Au (n,6n) 192 Au h 197 Au (n,7n) 191 Au h Motivation E+T (n,xn) reactions E+T results (n,xn) in EXFOR  measurement TSL Uppsala NPI Řež Evaluation Results Conclusion

5 E+T results – (n,xn) cross-section fault?? (n,xn) cross-sections need to be verified… ExperimentMCNPX simulation Motivation E+T (n,xn) reactions E+T results (n,xn) in EXFOR  measurement TSL Uppsala NPI Řež Evaluation Results Conclusion

6 Current status of (n,xn) reaction knowledge Motivation E+T (n,xn) reactions E+T results (n,xn) in EXFOR  measurement TSL Uppsala NPI Řež Evaluation Results Conclusion

7 Requirements for  measurements Requirements for using activation method of measurement:  high energy neutron source with good intensity  (quasi)monoenergetic neutrons with well known spectrum  pure monoisotopic samples  good spectroscopic equipment: shielded HPGe detectors  knowledge about the corrections on beam fluctuation, self-absorption, non-point like emitters… Studied (mono)isotopic materials: In all irradiations: Al, Au, Bi, I, In, Ta In some irradiations: Co, Cu, Fe, Mg, Ni, Y, Zn Motivation  measurement requirements exp. history TSL Uppsala NPI Řež Evaluation Results Conclusion

8 Cross-section experiments history 2007 – Proposal to EFNUDAT on (n,xn) measurements – accepted 5/2008 – pilot/testing measurements at NPI Řež – 25MeV 6/2008 – measurement at TSL Uppsala – 25, 50, and 97 MeV 8/2008 – measurements at NPI Řež – 20 MeV 4/2009 – measurements at NPI Řež – 32.5 MeV 5/2009 – measurement at NPI Řež – 37 MeV 2009 – proposal to last call of EFNUDAT on further experiments at Uppsala – accepted 2/ measurement at TSL Uppsala – 62, 70, 80, and 93 MeV Autumn/2010 – planned new measurements in Řež Motivation  measurement requirements exp. history TSL Uppsala NPI Řež Evaluation Results Conclusion

9 TSL Uppsala - Blue hall Blue hall: quasi-monoenergetic neutron source based on reaction 7 Li(p,n) 7 Be Motivation  measurement TSL Uppsala Blue hall irradiations NPI Řež Evaluation Results Conclusion Neutron spectra known for proton energies 25, 50 and 97 MeV

10 TSL Uppsala - irradiations Proton beam energy [MeV] Li-target thickness [mm]248.5 Proton beam current [  A] 552 Average energy of peak neutrons [MeV] Fraction of neutrons in the peak [%] Peak neutron flux density [10 5 cm -2 s -1 ] Motivation  measurement TSL Uppsala Blue hall irradiations NPI Řež Evaluation Results Conclusion

11 Cyclotron in NPI Řež Protons 18 – 37 MeV on 7 Li target High neutron intensities: 10 8 cm -2 s -1 Well equipped spectroscopic laboratory (NSD-NPI) Beam-line Li-target Graphite stopper Samples Motivation  measurement TSL Uppsala NPI Řež cyclotron neutron spectra Evaluation Results Conclusion

12 Neutron spectra from p/Li source in NPI Řež Neutron spectra known for 20, 25, 30, and 35 MeV – Y. Uwamino et al., NIM A389 (1997) 463 – similar construction of p/Li source Uncertainty in spectrum determination – 10% Motivation  measurement TSL Uppsala NPI Řež cyclotron neutron spectra Evaluation Results Conclusion

13 Evaluation process Irradiation N Yield HPGe Spectra evaluation Cross-section Corrections Production in peak Talys1.0 Motivation  measurement TSL Uppsala NPI Řež Evaluation process background 1 background 2 uncertainties Results Conclusion

14 Background subtraction 1 TALYS 1.0 (TALYS 1.2)  deterministic code  provides complete and accurate calculation of the nuclear reactions in the energy range from 1 keV to 200 MeV Motivation  measurement TSL Uppsala NPI Řež Evaluation process background 1 background 2 uncertainties Results Conclusion

15 Background subtraction 2  comparisons between EXFOR and TALYS 1.0 – mostly good agreement we believe the simulated  shape is OK, only the absolute value can be shifted following the neutron spectrum knowledge, we calculated ratio between production in neutron peak and total production with this ratio we multiplied the yields to subtract background production Motivation  measurement TSL Uppsala NPI Řež Evaluation process background 1 background 2 uncertainties Results Conclusion

16 Uncertainty analysis  HPGe detector calibration uncertainty: less than 3%  Gauss-fit of the gamma peaks: > 1% (usually less than 10%)  spectroscopic corrections uncertainty: less than 1%  neutron spectra determination: 10%  neutron beam intensity determination: 5% at NPI, 10% at TSL  TALYS 1.0 versus TALYS 1.2 – differences in results around 10%  TALYS modifications - nuclear density variations: less than 10% difference in results  background subtraction procedure – assessed to ~10% uncertainty, but will be further studied Motivation  measurement TSL Uppsala NPI Řež Evaluation process background 1 background 2 uncertainties Results Conclusion

Au(n,2n) 196 Au results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 196 Au 194 Au 193 Au 192 Au Conclusion

Au(n,4n) 194 Au results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 196 Au 194 Au 193 Au 192 Au Conclusion

Au(n,5n) 193 Au results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 196 Au 194 Au 193 Au 192 Au Conclusion

Au(n,6n) 192 Au results Au measured up to 188 Au… Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 196 Au 194 Au 193 Au 192 Au Conclusion

Bi(n,3n) 207 Bi results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 207 Bi 206 Bi Other Bi Conclusion

Bi(n,4n) 206 Bi results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 207 Bi 206 Bi Other Bi Conclusion

23 Other 209 Bi(n,xn) results Bi measured up to 200 Bi… Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 207 Bi 206 Bi Other Bi Conclusion

Ta(n,2n) 180 Ta results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 181 Ta 114m In 24 Na 27 Mg Conclusion

25 nat In(n,xn) 114m In results In measured up to 108 In… Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 181 Ta 114m In 24 Na 27 Mg Conclusion

26 27 Al(n,  ) 24 Na results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 181 Ta 114m In 24 Na 27 Mg Conclusion

27 27 Al(n,p) 27 Mg results Motivation  measurement TSL Uppsala NPI Řež Evaluation Results 181 Ta 114m In 24 Na 27 Mg Conclusion

28 Conclusions  Uppsala and Řež cross-section measurements covered wide range of energies (17 – 94 MeV)  threshold reactions in Au, Bi, I, In, and Ta studied up to (n,10n)  our results for well known cross-sections agree with other experimental data in EXFOR  near future: finish the evaluation of cross-section measurements from Uppsala - February 2010  autumn 2010 – planed next cross-sections measurements at NPI Řež  further study of the background subtraction procedure and its uncertainty Motivation  measurement TSL Uppsala NPI Řež Evaluation Results Conclusion

29 Acknowledgements We would like to thank to Dr. Bém and his colleagues for the possibility to joint their irradiations on cyclotron in Řež! This work was supported from the EFNUDAT,grant CTU and by the F4E program of the Nuclear Reaction Department (NPI), F4E-2008-GRT-014. Thank you for your attention..