Fission fragment angular distribution in the 234U(n,f) reaction

Document Type : Full length research Paper

Authors

1 Physics Department, Faculty of Science, Imam Hossein Comprehensive University, Tehran, Iran

2 Department of Physics, Payame Noor University, P. O. Box 19395-3697, Tehran, Iran

3 Department of Physics, Shiraz University, Shiraz, Iran

Abstract

Fission fragment angular distribution (FFAD) data are important to get new insights into the fission process. In this study, the frame work of statistical modeling is used to analyze FFAD from neutron induced fission of 234U.The results have been compared with recent experimental data of 234U(n, f) reaction measured at the n_TOF facility in CERN. Accurate analysis was performed in order to deduce the variance K02 of the K- distribution of levels in the transition nucleus at neutron energies from threshold up to 50 MeV. We show the method in which the quantitative values of K02 is obtained. We have also studied the periodic structure of anisotropy related to the set of (n,xn) reaction in comparison with related cross section performed with TALYS1.8 code. The comparison of the variance with the cross section clearly illustrates the strong correlation between the value of the variance and the opening of a fission chance. We show that whenever the probability of reaction in a new channel and cross section increases, K02 decreases; so the minimum of K02 can show the maximum probability of (n,f)xn reaction. The results are in a good agreement with similar calculations in232Th(n,f) and 238U(n,f) reactions.

Keywords

References

[1] R. Vandenbosh, and J. Huizenga, Nuclear Fission, Academic Press, New York, (1973).
[2] E. Leal-Cidoncha, Neutron-induced fission fragment angular distribution and cross section of uranium targets at CERN n-TOF, PhD thesis, Universidade de Santiago de Compostela. (2017) i,7.
[3[ E. Leal-Cidoncha. et al., EPJ Web of Conf. 111 (2016) 10002.
[4] S. Rasouli, and A. N. Behkami, Shell Effect In Nuclear Fission, Islamic Azad University of Mahabad, M. Sc. Thesis (2007).
[5] R. El-Hajje, A Simultaneous Measurement of The Angular Distribution Mass and Kinetic Energy, New South Wales University, Ph.D. Thesis (2000) iii. 69.
[6] F. Gunsing et al., 14th Int. Conf. Nucl. Reaction Mech., Varenna, Italy, Villa Monastero (2015) p.323.    
 [7]F.M. Rahimi, O.N. Ghodsi, A.N. Behkami, Nuclear Technology & Radiation Protection 18 (2003) 31.
[8]J.R. Huizenga, A.N. Behkami, L.G. Moretto. Note on Interpretation of Fission-Fragment Angular Distribution at Moderate Excitation Energies, Physical Review, 177 (1969) 1827.
[9] I.V. Ryzhov, et. al., Influence of multichance fission on fragment angular anisotropy in the 232Th(n, f) and 238U(n, f) reactions at intermediate energies, Nuclear Physics A 760, (2005).
[10] T. Datta, S.P. Dange, H. Naikand, S.B. Manohar, Physical Review C 48 (1993) 221.     
[11] E.H. Auerbach, F.G.J. Perey, BNL Report 765. Brookhaven Nat. Lab. Upton, New York (1962).
[12] A.J. Koning, S. Hilairey, M. Duijvestijn. "User’s Manual of TALYS 1.4 Codes: a nuclear reaction program." Nuclear Research and Consultancy Group (NRG), Netherlands (2011) 1-456.
[13] R. Razavi et al., Zeitschrift für Naturforschung A 71 (2016) 157-160.
[14] R. Razavi, A. Rahmatinejad, T. Kakavand, A. Khooy, Pairing phase transition of nucleons in 89Y and 208Pb,Journal of Research on Many-body Systems, 13 (2017)79-85.
[15] L. Sai Leong, Fission fragment angular distribution and fission cross section validation. Ph. D. Thesis. Université Paris Sud - Paris XI, (2013) 112.
[16] S. Rasouli, A.N. Behkami, R. Razavi, A.A. Sabouri Dodaran and M.R. Bayati, Investigation on Neutron-Induced Fission Fragment Angular Distribution of 232Th and 238U. Zeitschrift für Naturforschung A 73(11) (2018) 1075–1081.
Journal of Research on Many-body Systems
Volume 9, Issue 2
September 2019
Pages 79-88

Files

History

  • Receive Date: 22 October 2018
  • Revise Date: 06 April 2019
  • Accept Date: 03 June 2019

Share

How to cite

Statistics