Measurement of the angular distribution of fission fragments using a PPAC assembly at CERN n_TOF

Tarrío, D.; Leong, L.S.; Audouin, L.; Durán, I.; Paradela, C.; Tassan‐Got, L.; Naour, C. Le; Bacri, C.O.; Petitbon, V.; Mottier, J.; Caamaño, M.; Altstadt, S.; Andrzejewski, J.; Barbagallo, M.; Bécares, V.; Bečvář, F.; Belloni, F.; Berthoumieux, E.; Billowes, J.; Boccone, V.; Bosnar, D.; Brügger, M.; Calviani, M.; Calviño, F.; Cano‐Ott, D.; Carrapiço, C.; Cerutti, F.; Chiaveri, E.; Chin, M.; Colonna, N.; Cortés, G.; Cortés-Giraldo, M.A.; Diakaki, Μ.; Domingo‐Pardo, C.; Dzysiuk, N.; Eleftheriadis, C.; Ferrari, A.; Fraval, K.; Ganesan, S.; García, A. R.; Giubrone, G.; Gómez-Hornillos, M.B.; Gonçalves, I. F.; González‐Romero, E.; Griesmayer, E.; Guerrero, C.; Gunsing, F.; Gurusamy, P.; Jenkins, D. G.; Jericha, E.; Kadi, Y.; Käppeler, F.; Karadimos, D.; Koehler, P.; Kokkoris, M.; Krtička, M.; Kroll, J.; Langer, C.; Lederer, C.; Leeb, H.; Losito, R.; Manousos, A.; Marganiec, J.; Martínez, T.; Massimi, C.; Mastinu, P.; Mastromarco, M.; Meaze, M.; Mendoza, E.; Mengoni, A.; Milazzo, Paolo; Mingrone, F.; Mirea, M.; Mondalaers, W.; Pavlik, A.; Perkowski, J.; Plompen, A.; Praena, J.; Quesada, J. M.; Rauscher, T.; Reifarth, R.; Riego, A.; Román, F.; Rubbia, C.; Sarmento, R.; Schillebeeckx, P.; Schmidt, S.; Tagliente, G.; Taín, J. L.; Tsinganis, A.; Valenta, S.; Vannini, G.; Variale, V.; Vaz, P.; Ventura, A.; Versaci, R.; Vermeulen, M. J.; Vlachoudis, V.; Vlastou, R.; Wallner, A.; Ware, T.; Weigand, M.; Weiß, C.; Wright, T.; Žugec, P.

doi:10.1016/j.nima.2013.12.056

Cited by 32 publications

(29 citation statements)

References 14 publications

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“…Fission events were detected using a reaction chamber containing Parallel Plate Avalanche Counters (PPACs) developed at IPN-Orsay. The PPACs used in these experiments have been described previously [8,9].…”

Section: Experimental Datamentioning

confidence: 99%

On the search for a (n,f) cross-section reference at intermediate energies

et al. 2017

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Abstract. The (n,f) cross-sections proposed as references by the IAEA for 235 U, 238 U and 209 Bi are compared with a new analysis that combines the measurements performed at CERN-n TOF of their cross-section ratios with new calculations done using Monte Carlo codes based on phenomenological models INCL++, GEMINI++, and ABLA07. The calculations are cross-checked with those for the (p,f) reactions, where experimental values are available. We have evaluated in this way the (n,f) cross sections for 238 U, 235 U and 209 Bi, in the intermediate energy region going from 190 MeV to 2 GeV. Our results definitively discard the JENDL/HE-2007 evaluations above 300 MeV, falling inside the confidence corridor proposed by IAEA but for the points around 300-400 MeV where a discrepancy is to be noticed.

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Section: Experimental Datamentioning

confidence: 99%

On the search for a (n,f) cross-section reference at intermediate energies

et al. 2017

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“…A Parallel Plate Avalanche Counter (PPAC) is a type of gas detector widely used to detect heavy ions [9,12]. It consists of two thin parallel electrodes separated by a gap filled with gas at a pressure of a few mbar.…”

Section: Ppac Developmentmentioning

confidence: 99%

“…The angular distribution of the fragments can be described using a series of even Legendre polynomials P L (cos θ ) including terms up to the order L max = 4, thus leaving 3 free parameters to fit the data [9,14]:…”

Section: Angular Distribution and Cross Section Calculationmentioning

confidence: 99%

“…Figure 4(a) represents a forward peaked distribution, what is the predominant situation in neutroninduced fission of actinides at intermediate energies, whereas Fig. 4(b) shows an example of a side peaked distribution, typical case from threshold and subthreshold fission of some even-even actinides [9,14]. In these conceptual simulations we have neglected the (minor) effect of linear momentum transfer from the incident particle to the fissioning nucleus.…”

Section: Angular Distribution and Cross Section Calculationmentioning

confidence: 99%

“…The strong anisotropies observed at the opening of the multiple-chance fission channels (n,xn'f) help to determine their thresholds. Moreover, these anisotropies affect the precision of the cross section measurements when using detectors with a limited angular acceptance, requiring a good knowledge on the angular distribution to correct for this effect [9]. a e-mail: diego.tarrio@physics.uu.se Therefore, we propose a quasi-absolute measurement of cross sections and angular distributions for 235 U(n,f) and 238 U(n,f) using recoil protons from the H(n,p) reaction for normalization, thus linking together three standard cross sections for neutron measurements with good accuracy.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the Medley setup for measurements of neutron-induced fission cross sections at the GANIL-NFS facility

et al. 2017

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Abstract. Neutron-induced fission cross sections of 235 U and 238 U are widely used as standards for monitoring of neutron beams and fields. An absolute measurement of these cross sections at an absolute scale, i.e., versus the H(n,p) scattering cross section, is planned with the white neutron beam under construction at the Neutrons For Science (NFS) facility in GANIL. The experimental setup, based on PPACs and ∆E-∆E-E telescopes containing Silicon and CsI(Tl) detectors, is described. The expected uncertainties are discussed.

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