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Fission cross section measurements with a coincidence method

Fission cross section measurements with a coincidence method

Fission cross section measurements with a coincidence method. Measured isotopes : 233 U, 234 U, 232 Th, 237 Np, and 209 Bi, nat Pb References : 235 U and 238 U. Focus on isotopes with several targets : 234 U (2 targets), 232 Th (5 targets), 237 Np (4 targets). Detection layout.

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331 views • 20 slides
Motivations

Motivations

Motivations. Fission fragment angular distribution is an ingredient in the measurement of the fission cross section Angular distribution gives information on the spin properties of fissionning nucleus The angular distributions are not well known above 10 MeV. ? f for 237 Np. Detection cell.

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173 views • 17 slides
Coincidence method

Coincidence method

Coincidence method. Detection of the 2 fission fragments High level of rejection of alphas and high energy reactions (>10 MeV) Very thin target backing and detectors. Parallel plate avalanche counters. Very thin detectors : Reduction of scattered neutrons No correction for self absorption

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344 views • 14 slides
Characterization of n_TOF fission samples

Characterization of n_TOF fission samples

Characterization of n_TOF fission samples. National Technical University of Athens, Department of Physics, Athens, Greece. Rosa Vlastou. Characterization.

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232 views • 12 slides
L. Tassan-Got, L. Audouin, M. Mac Cormick, IN2P3/IPN Orsay-France

L. Tassan-Got, L. Audouin, M. Mac Cormick, IN2P3/IPN Orsay-France

Extension to experiment INTC-P-209 Angular distributions in the neutron-induced fission of actinides. L. Tassan-Got, L. Audouin, M. Mac Cormick, IN2P3/IPN Orsay-France C. Paradela, I. Duran, D. Tarrio, USC-Spain V. Vlachoudis, CERN

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241 views • 11 slides
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????????????? ???????????. ????????????? ????. Tl. Pb. Bi. Pb. Tl. Po. Pb. Bi. Po. Po. Rn. At. Rn. Ra. Th. Th. Pa. U. U. ????????????? ??? ????? 238 U. 81. 82. 83. 84. 85. 86. 87. 88. 89. 90. 91. 92. 93. 206. 4,19 ?. 0,00005. 210.

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256 views • 5 slides

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