Mass dependence of pion-induced fission cross sections on the level density parameter

  • Fission probabilities and fission cross sections strongly depend on the mass number of the target and energy of the projectile. In this research work, a cascade-exciton model (using CEM95 computer code) has been implemented to observe the dependence of pion-induced fission cross sections and fission probabilities on the target mass and ratio of the level density parameter in fission to neutron emission. The analysis has been performed for both the positive and negative pions as the projectile at 80, 100 and 150 MeV energies. The computed cross sections satisfactorily reproduced the experimental findings when compared with the available experimental data in the literature. We observed a smooth dependence at 150 MeV, and a sharper dependence at 80 and 100 MeV pion energy, in the fissility region above 29.44.
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  • [1] Zafar Yasin et al. Nucl. Phys. A, 2006, 765: 390[2] Zafar Yasin, Shahzad M Ikram. Nucl. Phys. A, 2006, 773: 221[3] Zafar Yasin et al. Nucl. Phys. A, 2007, 781: 296[4] Zafar Yasin et al. Radiation Measurements, 2008, 43: S174[5] Zafar Yasin, Shahzad M I. Ann. Nucl. Energy, 2010, 37: 87[6] Zafar Yasin et al. Radiation Measurements, 2009, 44: 846[7] Tanabe K. Prog. Theor. Phys., 1979, 61: 354[8] Arruda-Neto J D T et al. Phys. Rev. C, 1996, 54: 3294[9] Hicks K H et al. Phys. Rev. C, 1985, 31: 1323[10] Mashnik S G. Computer Code CEM95, OECD Nuclear Energy Agency Data Bank. France: Paris, 1995[11] Mashnik S G. Acta Phys. Slovaca, 1993, 43: 86[12] Mashnik S G. Acta Phys. Slovaca, 1993, 43: 243[13] Zafar Yasin. Chin. Phys. Lett., 2009, 26(8): 082595-1-082595-4[14] Gudima K K, Mashnik S G, Toneev V D. Nucl. Phys. A, 1983, 401: 329[15] Aydin A et al. Ann. Nucl. Energy, 2009, 36(9): 1307[16] Iljinov A S, Cherepanov E A, Chigrinov S E. Z. Physik A, 1978, 287: 37[17] Tavares O A P, Medeiros E L. J. Phys. G. Nucl. Part. Phys., 2004, 30: 395[18] Iljinov A S, Cherepanov E A, Chigrinov S E. Sov. J. Nucl. Phys., 1980, 32(1): 166[19] Barros S de, Silva A G da, Suita J C, Peterson R J. Z. Phys. A, 1997, 359: 35[20] Gadioli E et al. Z. Physik A, 1978, 288: 39[21] Sauer G, Chandra H, Mosel U. Nucl. Phys. A, 1976, 264: 221[22] Barashenkov V S, Gereghi F G, Iljinov A S, Toneev V D. Nucl. Phys. A, 1974, 222: 204[23] Iljinov A S, Mebel M V, Bianchi N, Sanctis E De, Guardalo C, Lucherini V, Muccifora V, Polli E, Reolon A R, Rossi P. Nucl. Phys. A, 1992, 543: 517[24] Krappe H J, Nix J R, Sierk A J. Phys. Rev. C, 1979, 20: 992[25] Truran J W, Cameron A G W, Hilf E. Proc. Int. Conf. on the Properties of Nuclei Far from the Region of Beta-Stability, Leysin, Switzerland, 1970, 1: 275[26] Peterson R J, Barros S de et al. Z. Phys. A, 1995, 352: 181[27] Vandenbosch R, Huizenga J R. Academic Press. 1973[28] Bishop C J et al. Nucl. Phys. A, 1972, 198: 161
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Zafar Yasin, Warda Iram and Ikram Shahzad. Mass dependence of pion-induced fission cross sections on the level density parameter[J]. Chinese Physics C, 2012, 36(9): 831-835. doi: 10.1088/1674-1137/36/9/007
Zafar Yasin, Warda Iram and Ikram Shahzad. Mass dependence of pion-induced fission cross sections on the level density parameter[J]. Chinese Physics C, 2012, 36(9): 831-835.  doi: 10.1088/1674-1137/36/9/007 shu
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Received: 2011-09-06
Revised: 1900-01-01
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Mass dependence of pion-induced fission cross sections on the level density parameter

    Corresponding author: Zafar Yasin,

Abstract: Fission probabilities and fission cross sections strongly depend on the mass number of the target and energy of the projectile. In this research work, a cascade-exciton model (using CEM95 computer code) has been implemented to observe the dependence of pion-induced fission cross sections and fission probabilities on the target mass and ratio of the level density parameter in fission to neutron emission. The analysis has been performed for both the positive and negative pions as the projectile at 80, 100 and 150 MeV energies. The computed cross sections satisfactorily reproduced the experimental findings when compared with the available experimental data in the literature. We observed a smooth dependence at 150 MeV, and a sharper dependence at 80 and 100 MeV pion energy, in the fissility region above 29.44.

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