caa a22 4500 445872160 CHVBK 20180317145515.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1140/epja/i2011-11085-4 doi (NATIONALLICENCE)springer-10.1140/epja/i2011-11085-4 A study of reaction rates of (n, f ) , (n, $ \gamma$ ) and (n, 2n) reactions in natU and 232Th by the neutron fluence produced in the graphite set-up (GAMMA-3) irradiated by 2.33 GeV deuteron beam [Elektronische Daten] [J. Adam, Chitra Bhatia, K. Katovsky, V. Kumar, M. Majerle, V. Pronskikh, A. Khilmanovich, B. Martsynkevich, I. Zhuk, V. Golovatiouk, W. Westmeier, A. Solnyshkin, V. Tsoupko-Sitnikov, A. Potapenko] Spallation neutrons produced in the collision of a 2.33GeV deuteron beam with a large lead target are moderated by a thick graphite block surrounding the target and used to activate the radioactive samples of natU and Th put at three different positions, identified as holes "a”, "b” and "c” in the graphite block. Rates of the (n, f), (n, $ \gamma$ and (n, 2n) reactions in the two samples are determined using the gamma spectrometry. The ratios of the experimental reaction rates, R (n, 2n)/R (n, f), for 232Th and natU are estimated in order to understand the role of the (n, x n) kind of reactions in Accelerator-Driven Sub-critical Systems. For the Th-sample, the ratio is ∼ 54 (10)% in the case of hole "a” and ∼ 95 (57)% in the case of hole "b” compared to 1.73(20)% for hole "a” and 0.710(9)% for hole "b” in the case of the natU sample. Also the ratio of fission rates in uranium to thorium, natU (n, f)/ 232Th (n, f), is ∼ 11.2 (17) in the case of hole "a” and 26.8(85) in hole "b”. Similarly, the ratio 238U (n, 2n)/ 232Th (n, 2n) is 0.36(4) for hole "a” and 0.20(10) for hole "b” showing that 232Th is more prone to the (n, x n) reaction than 238U . All the experimental reaction rates are compared with the simulated ones by generating neutron fluxes at the three holes from MCNPX 2.6c and making use of the LA150 library of cross-sections. The experimental and calculated reaction rates of all the three reactions are in reasonably good agreement. The transmutation power, P norm as well as P norm/P beam of the set-up is estimated using the reaction rates of the (n, $ \gamma$ and (n, 2n) reactions for both the samples in the three holes and compared with some of the results of the "Energy plus Transmutation” set-up and TARC experiment. SIF, Springer-Verlag Berlin Heidelberg, 2011 Adam J. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut Bhatia Chitra HENP Laboratory (ADS Program), Physics Department, University of Rajasthan, Jaipur, India aut Katovsky K. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut Kumar V. HENP Laboratory (ADS Program), Physics Department, University of Rajasthan, Jaipur, India aut Majerle M. Czech Academy of Science, Nuclear Physics Institute, 250 68, Řež, Prague, Czech Republic aut Pronskikh V. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut Khilmanovich A. Institute of Physics of National Academy of Sciences, Minsk, Belarus aut Martsynkevich B. Institute of Physics of National Academy of Sciences, Minsk, Belarus aut Zhuk I. Kernchemie Institute, Philips-Universität, Marburg, Germany aut Golovatiouk V. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut Westmeier W. Kernchemie Institute, Philips-Universität, Marburg, Germany aut Solnyshkin A. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut Tsoupko-Sitnikov V. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut Potapenko A. Joint Institute of Power and Nuclear Research, Sosny, Minsk, Belarus aut The European Physical Journal A Springer-Verlag 47/7(2011-07-01), 1-18 1434-6001 47:7<1 2011 47 10050 https://doi.org/10.1140/epja/i2011-11085-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epja/i2011-11085-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Adam J. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut NATIONALLICENCE 700 1- Bhatia Chitra HENP Laboratory (ADS Program), Physics Department, University of Rajasthan, Jaipur, India aut NATIONALLICENCE 700 1- Katovsky K. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut NATIONALLICENCE 700 1- Kumar V. HENP Laboratory (ADS Program), Physics Department, University of Rajasthan, Jaipur, India aut NATIONALLICENCE 700 1- Majerle M. Czech Academy of Science, Nuclear Physics Institute, 250 68, Řež, Prague, Czech Republic aut NATIONALLICENCE 700 1- Pronskikh V. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut NATIONALLICENCE 700 1- Khilmanovich A. Institute of Physics of National Academy of Sciences, Minsk, Belarus aut NATIONALLICENCE 700 1- Martsynkevich B. Institute of Physics of National Academy of Sciences, Minsk, Belarus aut NATIONALLICENCE 700 1- Zhuk I. Kernchemie Institute, Philips-Universität, Marburg, Germany aut NATIONALLICENCE 700 1- Golovatiouk V. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut NATIONALLICENCE 700 1- Westmeier W. Kernchemie Institute, Philips-Universität, Marburg, Germany aut NATIONALLICENCE 700 1- Solnyshkin A. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut NATIONALLICENCE 700 1- Tsoupko-Sitnikov V. Joint Institute for Nuclear Research, 141980, Dubna (Moscow Region), Russian Federation aut NATIONALLICENCE 700 1- Potapenko A. Joint Institute of Power and Nuclear Research, Sosny, Minsk, Belarus aut NATIONALLICENCE 773 0- The European Physical Journal A Springer-Verlag 47/7(2011-07-01), 1-18 1434-6001 47:7<1 2011 47 10050 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer