Pion induced fission

Gadioli, E.; Erba, E. Gadioli; Moroni, A.

doi:10.1007/bf01408199

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…The agreement between the calculation and experimental data show a tendency to change the a f /a n in the range 1.178-1.129 which is in good agreement with experimental data. As it has been observed in this and in previous studies [1,13], for CEM95, and in many other different models [6,8,16], that fission cross sections strongly depend on a f /a n . Hence, selecting the proper values of this ratio while calculating the fission cross sections by using the CEM95 computer code is strongly recommended.…”

Section: At Lowersupporting

confidence: 86%

Cascade-exciton model analysis of level density parameter dependence in proton induced fission cross sections of some sub-actinide nuclei

Yasin¹,

Iram²,

Asghar³

et al. 2011

Chinese Phys. C

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Fission cross sections strongly depend on the ratio of the level density parameter in fission to neutron emission, a f /an. In this work, a cascade-exciton model implemented in the code CEM95 has been used to observe this effect for proton induced fission cross sections of tungsten, lead and bismuth. The method was employed using different level density parameter ratios for each fission cross section calculation. The calculated fission cross sections are compared with the available experimental data in the literature. It has been observed that a change of the ratio of the level density parameter, a f /an, is necessary with the incident energy of the proton, to best estimate the fission cross sections in CEM95.

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Section: At Lowersupporting

confidence: 86%

Cascade-exciton model analysis of level density parameter dependence in proton induced fission cross sections of some sub-actinide nuclei

Yasin¹,

Iram²,

Asghar³

et al. 2011

Chinese Phys. C

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“…The rapid increase of cross sections with mass is directly correlated with the strong decrease of fission barriers with mass, as also indicated in Ref. [24,25].…”

Section: Resultssupporting

confidence: 66%

Cascade-exciton model analysis of mass dependence of pion-induced fission

Shahzad¹,

Yasin²,

Iram³

et al. 2014

Chinese Phys. C

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The cascade-exciton model has been used to observe the dependence of pion induced fission cross sections on the mass of the target. The analysis has been performed at energies 80 MeV, 100 MeV and 150 MeV for both the positive and negative pions. It has been shown that a single value of the ratio af/an can satisfactorily reproduce the experimental findings when compared with the available experimental data in the literature. The general trend of the fission cross sections with mass (fissility parameter) is seen to be low and slowly changing for the lighter nuclei, and it will steeply rise for the heavy nuclei.

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“…The curves indicate the smooth upward trends of fission cross sections and fission probabilities with the target mass. The dramatic increase of cross sections with mass is directly correlated with the strong decrease of fission barriers with mass [19,20]. As we have shown in our previous studies, for CEM95, the computed fission cross sections heavily depend on the ratio of the level density parameter in fission to neutron emission, i.e.…”

Section: Resultsmentioning

confidence: 58%

“…on a f/ a n [1,13]. Dependence of fission cross sections on a f /a n has also been observed in other models and this ratio has different values in different models [15][16][17]20]. Hence, we have carefully selected this ratio in the present study.…”

Section: Resultsmentioning

confidence: 90%

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

2012

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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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Pion induced fission

Abstract: Fissilities induced by the absorption of 7r-at rest in nuclei ranging from rare earth region to Uranium are evaluated by means of the Exciton Model. The theoretical results satisfactorily reproduce the experimental findings provided the ratio a/a n is greater than unity and equal to 1.1.

Cited by 10 publications

References 14 publications

Cascade-exciton model analysis of level density parameter dependence in proton induced fission cross sections of some sub-actinide nuclei

Cascade-exciton model analysis of level density parameter dependence in proton induced fission cross sections of some sub-actinide nuclei

Cascade-exciton model analysis of mass dependence of pion-induced fission

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

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