Browsing by Author "Patel, T."

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    Measurement and covariance analysis of 232Th (n , 2 n) 231Th reaction cross section
    (2019) Karkera, M.; Yerraguntla, S.S.; Punchithaya, S.; Suryanarayana, S.V.; Karantha, M.P.; Naik, H.; Ganesan, S.; Dhanu, L.S.; Kumar, R.; Deo, K.; Raj, D.; Patel, T.; Bishnoi, S.; Kannan, U.
    The 232Th (n , 2 n) 231Th reaction cross sections were measured at the neutron energies of 10.49 0.29, 14.46 0.26, 18.36 0.24 MeV and 15.03 0.003 MeV. For the first three energies, 7Li (p , n) reaction as a neutron source at the BARC-TIFR Pelletron accelerator facility was used. For the latter energy, 3H (d , n) neutron source using the PURNIMA neutron generator facility was used. The experiments were carried out using the activation method and off-line ? -ray spectrometric technique. Covariance information of various attributes of cross section was propagated to obtain the covariance matrix for the reaction cross sections. The experimental resuts obtained with reference to the two different neutron sources are then compared with the values of evaluated nuclear data files such as ENDF/B-VIII.0, JENDL 4.0, JEFF-3.2, ROSFOND-2010, TENDL-2017 and the theoretical values from TALYS-1.9 code. 2019, Akad miai Kiad , Budapest, Hungary.
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    Measurement and covariance analysis of 232Th (n , 2 n) 231Th reaction cross section
    (Springer Netherlands rbk@louisiana.edu, 2019) Karkera, M.; Yerraguntla, S.S.; Punchithaya, S.; Suryanarayana, S.V.; Karantha, M.P.; Naik, H.; Ganesan, S.; Dhanu, L.S.; Kumar, R.; Deo, K.; Raj, D.; Patel, T.; Bishnoi, S.; Kannan, U.
    The 232Th (n , 2 n) 231Th reaction cross sections were measured at the neutron energies of 10.49 ± 0.29, 14.46 ± 0.26, 18.36 ± 0.24 MeV and 15.03 ± 0.003 MeV. For the first three energies, 7Li (p , n) reaction as a neutron source at the BARC-TIFR Pelletron accelerator facility was used. For the latter energy, 3H (d , n) neutron source using the PURNIMA neutron generator facility was used. The experiments were carried out using the activation method and off-line ? -ray spectrometric technique. Covariance information of various attributes of cross section was propagated to obtain the covariance matrix for the reaction cross sections. The experimental resuts obtained with reference to the two different neutron sources are then compared with the values of evaluated nuclear data files such as ENDF/B-VIII.0, JENDL 4.0, JEFF-3.2, ROSFOND-2010, TENDL-2017 and the theoretical values from TALYS-1.9 code. © 2019, Akadémiai Kiadó, Budapest, Hungary.
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    Measurement of 14.54 ± 0.24 MeV neutron activation reaction cross sections of 93Nb, natMo with covariance analysis
    (Springer Netherlands rbk@louisiana.edu, 2020) Pasha, I.; Rudraswamy, R.; Yerranguntla, S.S.; Suryanarayana, S.V.; Pachuau, R.; Midhun, C.V.; Naik, H.; Patel, T.; Bishnoi, S.; Danu, L.S.
    The 93Nb(n,?)90mY, 93Nb(n,2n)92mNb and 92Mo(n,p)92mNb reaction cross sections have been measured relative to the 197Au(n,2n)196Au monitor reaction at the neutron energy of 14.54 ± 0.24 MeV. The neutrons were generated from the T(d,n)4He reaction using Purnima neutron generator. The experiment was done by using the method of activation in combination with an off-line ?-ray spectrometry technique. The uncertainties and correlations for the reaction cross sections were estimated with the use of covariance analysis by considering the partial uncertainties in individual attributes. The measured reaction cross sections have been analyzed by comparing with the data available in EXFOR compilation, various files of evaluated data and theoretically calculated values from TALYS-1.9. © 2020, Akadémiai Kiadó, Budapest, Hungary.