Presentation is loading. Please wait.

Presentation is loading. Please wait.

The n_TOF facility at CERN somewhere around here www.cern.ch/n_TOF.

Published byVerity Sims Modified over 8 years ago

Similar presentations

Presentation on theme: "The n_TOF facility at CERN somewhere around here www.cern.ch/n_TOF."— Presentation transcript:

1 The n_TOF facility at CERN somewhere around here www.cern.ch/n_TOF

2 CERN accelerator Complex n_TOF Linac(s): up to 50 MeV PSB: up to 1 GeV PS: up to 24 GeV www.cern.ch/n_TOF

3 The n_TOF facility at CERN www.cern.ch/n_TOF

4 4 n_TOF n_TOF commissioned in 2002 n_TOF commissioned in 2002 www.cern.ch/n_TOF sample June 2004

5 n_TOF basic parameters alberto.mengoni@cern.ch proton beam momentum 20 GeV/c intensity (dedicated mode) 7 x 10 12 protons/pulse repetition frequency 1 pulse/2.4s pulse width 6 ns (rms) n/p300 lead target dimensions 80x80x60 cm 3 cooling & moderation material H2OH2OH2OH2O moderator thickness in the exit face 5 cm neutron beam dimension in EAR-1 (capture mode) 2 cm (FWHM)

6 The real world n_TOF beam characteristics: Neutron intensity in the full energy range n_TOF beam characteristics: Neutron intensity in the full energy range 2 nd collimator  =1.8 cm

7 The real world alberto.mengoni@cern.ch TAC 237 Np(n,  ) 2004 measurement www.cern.ch/n_TOF n_TOF beam characteristics: energy resolution n_TOF beam characteristics: energy resolution

8 n_TOF experiments 2002-4 Capture 151 Sm 151 Sm 204,206,207,208 Pb204,206,207,208 Pb, 209 Bi 209 Bi 204,206,207,208 Pb 209 Bi 232 Th 232 Th 24,25,26 Mg 24,25,26 Mg 90,91,92,94,96 Zr90,91,92,94,96 Zr, 93 Zr 93 Zr 90,91,92,94,96 Zr 93 Zr 139 La 139 La 186,187,188 Os 186,187,188 Os 233,234 U 233,234 U 237 Np237 Np, 240 Pu, 243 Am 240 Pu 243 Am 237 Np 240 Pu 243 Am Fission 233,234,235,236,238 U 233,234,235,236,238 U 232 Th 232 Th 209 Bi 237 Np 237 Np 241,243 Am, 245 Cm 245 Cm 245 Cm The n_TOF Collaboration 1.Cross sections relevant for Nuclear Astrophysics 2.Measurements of neutron cross sections relevant for Nuclear Waste Transmutation and related Nuclear Technologies 3.Neutrons as probes for fundamental Nuclear Physics

9 The n_TOF-Ph2 experiments Capture measurements Mo, Ru, Pd stable isotopes Fe, Ni, Zn, and Se (stable isotopes) 79 Se A≈150 (isotopes varii) 234,236 U, 231,233 Pa 235,238 U 239,240,242 Pu, 241,243 Am, 245 Cm r-process residuals calculation isotopic patterns in SiC grains s-process nucleosynthesis in massive stars accurate nuclear data needs for structural materials s-process branching points long-lived fission products Th/U nuclear fuel cycle standards, conventional U/Pu fuel cycle incineration of minor actinides n_TOF-Ph2

10 Fission measurements MA 235 U(n,f) with p(n,p’) 234 U(n,f) ADS, high-burnup, GEN-IV reactors new 235 U(n,f) cross section standard study of vibrational resonances at the fission barrier Other measurements 147 Sm(n,  ), 67 Zn(n,  ), 99 Ru(n,  ) 58 Ni(n,p), other (n,lcp) Al, V, Cr, Zr, Th, 238 U(n,lcp) He, Ne, Ar, Xe n+D 2 p-process studies gas production in structural materials structural and fuel material for ADS and other advanced nuclear reactors low-energy nuclear recoils (development of gas detectors) neutron-neutron scattering length n_TOF-Ph2 The n_TOF-Ph2 experiments

11 n_TOF-Ph2 n_TOF target New Experimental Area (EAR-2) The second n_TOF beam line & EAR-2 EAR-1 (at 185 m) ~ 20 m Flight-path length : ~20 m at 90° respect to p-beam direction expected neutron flux enhancement: 20 - 100 drastic reduction of the t 0 flash Flight-path length : ~20 m at 90° respect to p-beam direction expected neutron flux enhancement: 20 - 100 drastic reduction of the t 0 flash

12 Improvements (ex: 151 Sm case) sample mass / 3 s/bkgd=1 sample mass / 3 s/bkgd=1 use BaF 2 TAC  x 10 use BaF 2 TAC  x 10 use D 2 O  30 x 5 use D 2 O  30 x 5 use 20 m flight path  30 x 100 use 20 m flight path  30 x 100 consequences for sample mass 50 mg 50 mg 5 mg 5 mg 1 mg 1 mg 10  g 10  g boosts sensitivity by a factor of 5000 ! problems of sample production and safety issues relaxed EAR-2: Optimized sensitivity

13 The n_TOF Collaboration 40 Research Institutions 120 researchers www.cern.ch/n_TOF

14 The End www.cern.ch/n_TOF

15 alberto.mengoni@cern.ch Results

16 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments U Abbondanno et al. - The n_TOF Collaboration Phys. Rev. Lett. 93 (2004), 161103 branching isotope in the Sm-Eu-Gd region: test for low-mass TP-AGB accurate branching ratio (capture/  -decay) provides infos on the thermodynamical conditions of the s-processing (if accurate capture rates are known!) Sm Eu Gd 150 Sm 151 Sm 93 a 152 Sm 153 Sm 42.27 h 154 Sm 151 Eu 152 Eu 9 h 153 Eu 154 Eu 8.8 a 155 Eu 4.761 a 156 Eu 15.2 d 152 Gd 153 Gd 239.47 d 154 Gd 155 Gd 156 Gd 157 Gd The n_TOF Collaboration

17 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments U Abbondanno et al. - The n_TOF Collaboration NIM A 521 (2004) 454 206 mg of 151 SmO 3 encapsulated in 0.1 mm Ti 200 GBq (5.3 Ci) activity PHWT: accuracy better than 2% (MC simulations of WF validated by measurements of resonances in 56 Fe & others)

18 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Very low background in capture cross section measurements on radioactive targets U Abbondanno et al. - The n_TOF Collaboration Phys. Rev. Lett. 93 (2004), 161103

19 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments U Abbondanno et al. - The n_TOF Collaboration Phys. Rev. Lett. 93 (2004), 161103 MACS-30 = 3100 ± 160 mb = 1.48 ± 0.04 eV, S 0 = (3.87 ± 0.20)×10 -4 MACS-30 = 3100 ± 160 mb = 1.48 ± 0.04 eV, S 0 = (3.87 ± 0.20)×10 -4 n_TOF The n_TOF Collaboration Main uncertainty components: - 3% flux normalization - 2% detector’s WF - 3% BG subtraction

20 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm Implications Using the “classical” s-process model we obtain T 8 > 4 incompatible with realistic He-shell burning conditions 95% of neutrons are produced by 13 C( ,n) at kT ~ 8 keV. Under these conditions, 152 Gd cannot be produced During the He-burning episode the 22 Ne( ,n) is activated at kT ~ 23 keV. The 151 Sm  -decay is fast enough to produce 70% of observed 152 Gd (solar) Present main uncertainties:  (T) of 151 Sm stellar capture rate Inverse reactions Inverse reactions

21 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Very low neutron sensitivity of capture  -ray detection systems & high resolution C Domingo-Pardo, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 207 Pb(n,  ) The n_TOF Collaboration

22 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Very low neutron sensitivity of capture  -ray detection systems & high resolution C Domingo-Pardo, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 209 Bi(n,  ) The n_TOF Collaboration

23 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Low PS duty-cycle favours meaasurements on radiactive samples F Gunsing, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 232 Th(n,  ) The n_TOF Collaboration

24 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Very low neutron sensitivity of capture  -ray detection systems & high resolution F Gunsing, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 232 Th(n,  ) The n_TOF Collaboration

25 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Very low neutron sensitivity of capture  -ray detection systems & high resolution The n_TOF Collaboration

26 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Very low neutron sensitivity of capture  -ray detection systems & high resolution The n_TOF Collaboration

27 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments L Marques, et al. - The n_TOF Collaboration The n_TOF Collaboration

28 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments The n_TOF Collaboration L Marques, et al. - The n_TOF Collaboration

29 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments The n_TOF Collaboration The extracted resonance parameters were compared with a previous measurement (Boldeman et al., 1976) L Marques, et al. - The n_TOF Collaboration

30 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments C Moreau, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 The n_TOF Collaboration ≈ 20% lower than previous data The extracted resonance parameters were compared with previous measurements (Boldeman et al., 1976; Others)

31 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Very low neutron sensitivity of capture  -ray detection systems & high resolution 93 Zr(n,  ): raw data from 2004 measurement 10 mm The n_TOF Collaboration

32 (n,  ) x-section of 139 La alberto.mengoni@cern.ch Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments

33 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm 139 La Neutron magic N=82 mostly produced by the s-process small x-section (resonance dominated) bottleneck in the s-process flow accurate abbundance measurements exist can be used for normalization of s-process abundance n_TOF experiments

34 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments 139 La(n,  ) R Terlizzi, et al. (INFN) The n_TOF Collaboration

35 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Remarkable energy resolution and background conditions have allowed to determine the resonance parameters up to 9 keV In the past, the best experimental data did not exceed 2.7 keV. R Terlizzi et al. (INFN) The n_TOF Collaboration Up to 2.7 KeV: n_TOF n_TOF < 10% of Nakajima + Musgrove < 20% of databases < 20% of databases MACS-30 in agreement with the FZK activation measurement(s) 139 La(n,  )

36 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments 139 La(n,  ) R Terlizzi et al. (INFN) The n_TOF Collaboration The measurement at n_TOF confirmed the MACS-30 of the FZK activation measurement (O’Brien et al., PRC 68 (2003) 35801) The measurement at n_TOF confirmed the MACS-30 of the FZK activation measurement (O’Brien et al., PRC 68 (2003) 35801) With the new MACS, the s-process contribution to the La production in TP-AGB is 73% (with respect to solar) With the new MACS, the s-process contribution to the La production in TP-AGB is 73% (with respect to solar) A combined analysis with the Eu abundance (mostly r) may furnish evidence on the origin and nature of the s- and r- productions A combined analysis with the Eu abundance (mostly r) may furnish evidence on the origin and nature of the s- and r- productions

37 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Long  -decay half-life of 187 Re Long  -decay half-life of 187 Re s-only 186 Os and 187 Os s-only 186 Os and 187 Os

38 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments

39 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments M Mosconi, et al. – (The n_TOF Collaboration) ND2004 Conference, Santa Fe, NM – Sept. 2004 Very low neutron sensitivity of capture  -ray detection systems & high resolution

40 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments M Mosconi, et al. – (The n_TOF Collaboration) ND2004 Conference, Santa Fe, NM – Sept. 2004 Very low neutron sensitivity of capture  -ray detection systems & high resolution

41 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm Theory still needed! For example, in 187 Os at kT = 30 keV it is: P(gs) = 33% P(1st) = 47% P(all others) = 20%

42 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments Age: Re/Os and Th/U clocks complementary complementary 8.510.5

43 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments n_TOF TAC in operation The n_TOF Collaboration 233 U(n,  ) W Dridi, E Berthoumieux, et al., (Dec. 2004)

44 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments n_TOF TAC in operation W Dridi, E Berthoumieux, et al., (Dec. 2004) The n_TOF Collaboration 234 U(n,  ) 1.) Room + target frame background 2.) Background due to the Ti canning +1.) 3.) Activity 4.) 234 U + 2.) + 3.)

45 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments n_TOF TAC in operation D Cano-Ott, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 The n_TOF Collaboration

46 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments D Cano-Ott, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 n_TOF TAC in operation The n_TOF Collaboration

47 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments D Cano-Ott, et al. - The n_TOF Collaboration ND2004 Conference, Santa Fe, NM – Sept. 2004 1% of statistics n_TOF TAC in operation The n_TOF Collaboration

48 Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments An unprecedent wide energy range can be explored at n_TOF in a single experiment 234 U(n,f) The n_TOF Collaboration PPACs & FIC-0 (2003)

49 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments 234 U(n,f) High-resolution data up to high(er) energies The n_TOF Collaboration PPACs & FIC-0 (2003)

50 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments An unprecedent wide energy range can be explored at n_TOF in a single experiment 235 U(n,f) The n_TOF Collaboration FIC-0 (2003)

51 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments An unprecedent wide energy range can be explored at n_TOF in a single experiment 236 U(n,f) The n_TOF Collaboration FIC-1 (2003)

52 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments An unprecedent wide energy range can be explored at n_TOF in a single experiment 232 Th(n,f) The n_TOF Collaboration PPAC detectors

53 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments High-resolution data up to high(er) energies 237 Np(n,f) The n_TOF Collaboration FIC-0 (2003)

54 Capture Capture 151 Sm 204,206,207,208 Pb, 209 Bi 232 Th 24,25,26 Mg 90,91,92,94,96 Zr, 93 Zr 139 La 186,187,188 Os 233,234 U 237 Np, 240 Pu, 243 Am Fission Fission 233,234,235,236,238 U 232 Th 209 Bi 237 Np 241,243 Am, 245 Cm n_TOF experiments High-resolution data up to high(er) energies 245 Cm(n,f) The n_TOF Collaboration FIC-1 (2003)

55 The n_TOF Collaboration back

56 Validation & accuracy of PHWT

57 back

58

59 n_TOF-Ph2 1.CIC: compensated ion chamber already tested at n_TOF For n_TOF-Ph2: four chambers in the same volume for multi- sample measurements Measurements: 147 Sm(n,  ) (tune up experiment) 147 Sm(n,  ) (tune up experiment) 6 LiF target for calibration EAR-2 boost: 6 LiF target for calibration EAR-2 boost: approx 100 times the ORELA count rate expected approx 100 times the ORELA count rate expected 67 Zn and 99 Ru (n,  ) measurements 67 Zn and 99 Ru (n,  ) measurementsMeasurements: 147 Sm(n,  ) (tune up experiment) 147 Sm(n,  ) (tune up experiment) 6 LiF target for calibration EAR-2 boost: 6 LiF target for calibration EAR-2 boost: approx 100 times the ORELA count rate expected approx 100 times the ORELA count rate expected 67 Zn and 99 Ru (n,  ) measurements 67 Zn and 99 Ru (n,  ) measurements (n,p), (n,  ) & (n,lcp) measurements

60 n_TOF-Ph2 2.MICROMEGAS already used for measurements of nuclear recoils at n_TOF For n_TOF-Ph2: converter replaced by sample expected count rate: 1 reaction/pulse (  =200 mb, Ø=5cm, 1  m thick) (n,p), (n,  ) & (n,lcp) measurements << back << back

61 n_TOF-Ph2 (n,p), (n,  ) & (n,lcp) measurements 3.Scattering chambers with  E-E or  E-  E-E telescopes Measurements: 56 Fe and 208 Pb (tune up experiment) 56 Fe and 208 Pb (tune up experiment) Al, V, Cr, Zr, Th, and 238 U Al, V, Cr, Zr, Th, and 238 U a few x 10 18 protons/sample in fission mode a few x 10 18 protons/sample in fission modeMeasurements: 56 Fe and 208 Pb (tune up experiment) 56 Fe and 208 Pb (tune up experiment) Al, V, Cr, Zr, Th, and 238 U Al, V, Cr, Zr, Th, and 238 U a few x 10 18 protons/sample in fission mode a few x 10 18 protons/sample in fission mode Setup: in parallel with fission detectors production cross sections  (E n ) for (n,xc) c = p, , d differential cross sections d  /d , d  /dE << back << back

62 Go Back Go Back

63 n_TOF experiments L Marques, et al. - The n_TOF Collaboration December 2004 2004 The n_TOF Collaboration

64 n_TOF experiments L Marques, et al. - The n_TOF Collaboration December 2004 2004 The n_TOF Collaboration

Download ppt "The n_TOF facility at CERN somewhere around here www.cern.ch/n_TOF."

Similar presentations

Ciemat Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas C. Guerrero NUDATRA Internal Trainning Course II Santiago de Compostela,

Ciemat Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas C. Guerrero NUDATRA Internal Trainning Course II Santiago de Compostela,
I. Dillmann Institut für Kernphysik, Forschungszentrum Karlsruhe KADoNiS The Sequel to the “Bao et al.” neutron capture compilations.

I. Dillmann Institut für Kernphysik, Forschungszentrum Karlsruhe KADoNiS The Sequel to the “Bao et al.” neutron capture compilations.
The s-process Fe Co Ni Rb Ga Ge Zn Cu Se Br As Zr Y Sr Kr (n,  ) ()() ()() r-process p-process 63 Ni, t 1/2 =100 a 64 Cu, t 1/2 =12 h, 40 % (

The s-process Fe Co Ni Rb Ga Ge Zn Cu Se Br As Zr Y Sr Kr (n,  ) ()() ()() r-process p-process 63 Ni, t 1/2 =100 a 64 Cu, t 1/2 =12 h, 40 % (
The s-process Fe Co Ni Rb Ga Ge Zn Cu Se Br As Zr Y Sr Kr (n,  ) ()() ()() r-process p-process 63 Ni, t 1/2 =100 a 64 Cu, t 1/2 =12 h, 40 % (

The s-process Fe Co Ni Rb Ga Ge Zn Cu Se Br As Zr Y Sr Kr (n,  ) ()() ()() r-process p-process 63 Ni, t 1/2 =100 a 64 Cu, t 1/2 =12 h, 40 % (
Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft Neutron capture cross sections on light nuclei M. Heil, F. Käppeler, E. Uberseder Torino workshop,

Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft Neutron capture cross sections on light nuclei M. Heil, F. Käppeler, E. Uberseder Torino workshop,
L. Tassan-Got – IPN Orsay Nuclear data and reactor physics Radiotoxicity and spent fuel.

L. Tassan-Got – IPN Orsay Nuclear data and reactor physics Radiotoxicity and spent fuel.
N_TOF fission data of interest for ADS

N_TOF fission data of interest for ADS
A 4-PAD MicroMegas system for monitoring purpose at n_TOF facility (CERN) M. Sabaté-Gilarte 1,2 T. Papaevangelou 3, F. Gunsing 3, E. Berthoumieux 3, M.

A 4-PAD MicroMegas system for monitoring purpose at n_TOF facility (CERN) M. Sabaté-Gilarte 1,2 T. Papaevangelou 3, F. Gunsing 3, E. Berthoumieux 3, M.
Stefano Marrone Istituto Nazionale Fisica Nucleare, Bari www.cern.ch/n_TOF OUTLINE n_TOF-Phase 1: Capture Results and Implications in Nuclear Astrophysics.

Stefano Marrone Istituto Nazionale Fisica Nucleare, Bari OUTLINE n_TOF-Phase 1: Capture Results and Implications in Nuclear Astrophysics.
Institute for Safety Research Dávid Légrády IP-EUROTRANS ITC2 Development of a Neutron Time-of-Flight Source at the ELBE Accelerator ELBE Neutron source.

Institute for Safety Research Dávid Légrády IP-EUROTRANS ITC2 Development of a Neutron Time-of-Flight Source at the ELBE Accelerator ELBE Neutron source.
E. Gonzalez: Nuclear data at n_TOF for fundamental science and industrial applications (AHIPA09 - Fermilab) 1 Nuclear data at n_TOF for fundamental science.

E. Gonzalez: Nuclear data at n_TOF for fundamental science and industrial applications (AHIPA09 - Fermilab) 1 Nuclear data at n_TOF for fundamental science.
E.Chiaveri on behalf of the n_TOF Collaboration n_TOF Collaboration/Collaboration Board Lisbon, 13/15 December 2011 Proposal for Experimental Area 2(EAR-2)

E.Chiaveri on behalf of the n_TOF Collaboration n_TOF Collaboration/Collaboration Board Lisbon, 13/15 December 2011 Proposal for Experimental Area 2(EAR-2)
Applications of neutron spectrometry Neutron sources: 1) Reactors 2) Usage of reactions 3) Spallation sources Neutron show: 1) Where atoms are (structure)

Applications of neutron spectrometry Neutron sources: 1) Reactors 2) Usage of reactions 3) Spallation sources Neutron show: 1) Where atoms are (structure)
Nuclear Astrophysics with the PJ Woods, University of Edinburgh.

Nuclear Astrophysics with the PJ Woods, University of Edinburgh.
Α - capture reactions using the 4π γ-summing technique Α. Lagoyannis Institute of Nuclear Physics, N.C.S.R. “Demokritos”

Α - capture reactions using the 4π γ-summing technique Α. Lagoyannis Institute of Nuclear Physics, N.C.S.R. “Demokritos”
14th International Conference on Nuclear Reaction Mechanisms – Varenna, June 15- 19, 2015 G. Tagliente – INFN Bari Recent results in Nuclear Astrophysics.

14th International Conference on Nuclear Reaction Mechanisms – Varenna, June , 2015 G. Tagliente – INFN Bari Recent results in Nuclear Astrophysics.
Neutron capture at the s-process branching points 171 Tm and 204 Tl Spokespersons: C. Guerrero (U.Sevilla/CERN) and C. Domingo-Pardo (CSIC-IFIC) Close.

Neutron capture at the s-process branching points 171 Tm and 204 Tl Spokespersons: C. Guerrero (U.Sevilla/CERN) and C. Domingo-Pardo (CSIC-IFIC) Close.
Neutron-induced reactions Michael Heil GSI Darmstadt Or How can one measure neutron capture cross sections in the keV range on small scale facilities?

Neutron-induced reactions Michael Heil GSI Darmstadt Or How can one measure neutron capture cross sections in the keV range on small scale facilities?
Neutron capture cross section measurements for nuclear astrophysics at n_TOF Michael Heil on behalf of the n_TOF collaboration Outline   The CERN n_TOF.

Neutron capture cross section measurements for nuclear astrophysics at n_TOF Michael Heil on behalf of the n_TOF collaboration Outline   The CERN n_TOF.
Astrophysics with spallation sources  (n,  ) cross sections for the s process  operating spallation facilities: LANSCE, J-PARC, n_TOF & examples for.

Astrophysics with spallation sources  (n,  ) cross sections for the s process  operating spallation facilities: LANSCE, J-PARC, n_TOF & examples for.

Similar presentations

Ads by Google