ACTIVITY REPORT OF THE NUCLEAR DATA GROUP

Transcription

1 ACTIVITY REPORT OF THE NUCLEAR DATA GROUP AT CENTRO ATOMICO BARILOCHE, ARGENTINA José Ignacio Márquez Damián Florencia Cantargi Christian Helman José Rolando Granada Neutron Physics Department Centro Atomico Bariloche Argentina WPEC SG-42 third meeting May 16th-18th, 2017 OECD, Paris, France J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 1 / 22

2 WHO WE ARE: THERMAL SCATTERING NUCLEAR DATA GROUP AT CENTRO ATOMICO BARILOCHE Rolando Granada Florencia Cantargi Christian Helman Ignacio Marquez Scattering theory and advanced neutron sources Cold moderator materials and neutron filters Solid state physics and ab initio methods Nuclear reactor applications and benchmarking Past members: Monica Sbaffoni (currently at IAEA), Victor Gillette (currently at University of Sharjah, U.A.E). J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 2 / 22

3 WHAT WE DO CH2 H2O Mesitylene (l) Mesitylene (s) PMMA Mesitylene (s) D2O Mesi / Toluene CH4 (s) Ice Silicon (monocrystalline) Silicon (polycrystalline) Clathrate Dodecane Ice Mesitylene (s) CH4 (l) H2O SD2 Mesitylene (s) TBP SiO2 Mesitylene (s) Ice Silicon (monocrystalline) Silicon (polycrystalline) Sapphire H2O D2O LD2 Bismuth LH2 J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 3 / 22

4 ACTIVITY REPORT 1. Development of new scattering kernels. 2. Collaboration with NEA - JEFF. 3. Collaboration with CSEWG - ENDF/B. 4. Activities in support of LAHN Project. 5. Other R&D activities and collaborations. J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 4 / 22

5 1A) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID ETHANE Liquid ethane has been proposed by Dr. Granada as an interesting replacement for liquid methane as an intermediate energy cool neutron moderator: Wide temperature range as a liquid ( K). Important protonic density (higher than liquid methane). Presence of low energy CH 3 rotational modes. Development continues this year with transmission measurements at Vesubio (ISIS - UK). J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 5 / 22

6 1A) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID ETHANE 1E-4 Cold Cool Water 293K Methane 22K Methane 100K 1E-5 (E) Thermal 1E-6 1E E (ev) J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 6 / 22

7 1A) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID ETHANE 9 s o Proton Density (10 22 at/cm 3 ) s l o METHANE l s s-mesitylene ETHANE WATER-RT T (K) J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 7 / 22

8 1A) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID ETHANE J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 8 / 22

9 1A) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID ETHANE J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG-42 9 / 22

10 1B) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID HYDROGEN AND DEUTERIUM The COLDH subroutine in LEAPR applies the Young-Koppel model for quantum rotators to hydrogen and deuterium. The subroutine applies a Vineyard correction to the translational motion of the molecule. This is incorrect, and was corrected by Granada and Gillette in The current model is an update of the model by Granada and Gillette, using the Sköld approximation for the coherent correction and updating the frequency spectra and structure factors. New evaluations available for K (ortho/para H 2) and K (ortho/para D 2). J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

11 1B) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID HYDROGEN AND DEUTERIUM 100 Scattering Cross Section [b] 10 1 Celli Grammer ENDF/B-VII (20 K) New CAB Evaluation (19 K) Seiffer (- 0.5% ortho H) Energy [ev] J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

12 1B) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID HYDROGEN AND DEUTERIUM 1000 Seiffert (normal H) New CAB evaluation (19 K) ENDF/B-VII (20 K) Scattering Cross Section [b] Energy [ev] J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

13 1B) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID HYDROGEN AND DEUTERIUM 20 Scattering Cross Section per D 2 molecule [b] 10 PSI (low energy) PSI Seiffert New CAB Evaluation ENDF/B-VII evaluation Energy [ev] J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

14 1B) DEVELOPMENT OF NEW SCATTERING KERNELS: LIQUID HYDROGEN AND DEUTERIUM Code is available as a development branch of NJOY in our repository at Github: Combining the options ncold and nsk, different models can be used: ncold nsk model 1/2/3/4 0 ENDF/B-VI models 1/2/3/4 1 Granada model (2004) 1/2/3/4 2 Granada model (2017) The code also allows to change smin as an input parameter. J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

15 2) COLLABORATION WITH NEA - JEFF Collaboration NEA to provide scattering kernels to JEFF: Thermal moderators: light water, heavy water. Cold moderators: light water ice, mesitylene, tolune, methane, liquid hydrogen, liquid deuterium. Neutron filters: silicon, sapphire. Nuclear data users from the advanced neutron sources community (many in Europe) will be benefited. JEFF will become the most complete evaluated data library for neutron scattering applications (see talk by Florencia Cantargi at 15:30) J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

16 3) COLLABORATION WITH CSEWG - ENDF/B Participation in CSEWG in support of ENDF/B, in collaboration with Danila Roubtsov from Canadian Nuclear Laboratories: Continued support for light and heavy water libraries: extrapolation to 650 and 800 K (light water) and 650 K (heavy water). Coordination of TSL section in the big paper. Collaboration with BNL on QA of TSL libraries: standarization of basic TSL checks. J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

17 4) ACTIVITIES IN SUPPORT OF LAHN PROJECT. LAHN (Laboratorio Argentino de Haces de Neutrones) is a project for the scientific utilization of neutron beams at the future RA-10 reactor. RA-10 is a 30 MW experimental reactor being built at Centro Atómico Ezeiza, Argentina. First concrete poured on May 6th, expected to become critical in The Nuclear Data Group is supporting this project by providing shielding and beam shielding calculations, and helping with education and training. J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

18 4) A CTIVITIES IN SUPPORT OF LAHN P ROJECT. J.I. M A RQUEZ D AMI A N, F. C ANTARGI, C. H ELMAN, J.R. G RANADA CAB A CTIVITY R EPORT WPEC SG / 22

19 4) ACTIVITIES IN SUPPORT OF LAHN PROJECT. J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

20 5) OTHER R&D ACTIVITIES AND COLLABORATIONS Ab initio calculations: beryllium and uranium dioxide. Development of LEAPR/NJOY: contributions will be made available online. Collaboration with CCHEN (Chile): calculation of delayed neutron fraction and effective delayed neutron fraction. Collaboration with PSI (Switzerland): transmission experiments in cold water / ice. Participation in UCANS / ICANS. IAEA CRP on Advanced Moderators for Intense Cold Neutron Beams in Materials Research. J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

21 5) COLLABORATION WITH PSI. Total cross section per H 2 O molecule [b] Ice (-2 C) Liquid Water (6 C) Supercooled water (-2 C) Room temp (20 C) PRELIMINARY DATA Wavelength [A] Comparison of preliminary ice and water transmission data with TSL models. Data was measured by Pierre Boilat and Muriel Siegwart from PSI at the test beamline of BER II reactor. J.I. MÁRQUEZ DAMIÁN, F. CANTARGI, C. HELMAN, J.R. GRANADA CAB ACTIVITY REPORT WPEC SG / 22

22 THANKS FOR YOUR TIME. QUESTIONS? PATAGONIA, ARGENTINA