Charge distributions in low-energy nuclear fission and their relevance to fission dynamics

Mariolopoulos, G.; Hamelin, Ch.; Blachot, J.; Bocquet, J. P.; Brissot, R.; Crançon, J.; Nifenecker, H.; Ristori, C.

doi:10.1016/0375-9474(81)90477-2

Cited by 94 publications

(47 citation statements)

References 12 publications

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“…In the same figure the elemental yield profile in 252Cf (S.F.) as reported by Mariolopoulos et al [15] is shown assuming same yields for the charge complementary fission product elements. It is seen that (1) the angular momentum profile has sharp fluctuations with the odd Z fragments having higher angular momenta compared to the neighbouring even Z fragments; (2) the profiles of angular momentum and elemental yields are nearly of inverse nature.…”

Section: Discussionsupporting

confidence: 55%

Influence of fission fragment nuclear structure on scission configuration in252Cf (S.F.)

Datta

Dange

Das

et al. 1986

Z. Physik A - Atomic Nuclei

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With the aim of investigating the influence of fragment nuclear structure e.g. shell closure configuration and odd-even nature on the scission configuration, fragment angular momenta have been deduced from the radiochemically determined independent isomeric yield ratios of the fission products ltlPd, 131Te, 133Te, 134I and 13SCs in 252Cf spontaneous fission. The fragments' angular momenta deduced are 8.8_+1.5, 5.8 _+ 1.0, 6.1 _+ 1.1, 11.5 _+ 1.1 and 9.8 __ 1.2h respectively. The angular momenta data from this work and literature have been analysed to arrive at fragments' deformations at the scission bringing out the influence of the spherical 82n and deformed 66n and 88n shells. The fragment angular momenta were also seen to be inversely correlated to their elemental yields exhibiting odd-even fluctuations. This has been explained in terms of equilibration of the collective degrees of freedom in low energy fission.

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Section: Discussionsupporting

confidence: 55%

Influence of fission fragment nuclear structure on scission configuration in252Cf (S.F.)

Datta

Dange

Das

et al. 1986

Z. Physik A - Atomic Nuclei

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“…Figure I shows that the B values for 132I are different in the fissioning nuclei 234U and 236U having comparable excitation energy and the neutron number of the complementary fragment (Nc) are away from 66. To investigate this aspect and any correlation between angular momentum and fission yield (as reported for a single fissioning nuclide [3]), fragment angular momentum for 131I and elemental yields of This figure does not include the elemental yields reported by Reisdorf et al [32] which does not manifest the usual odd-even systematics [26][27][28][29][30][31] perhapes due to the use of average x-ray yields. Angular momentum of 134I [3,10] in various fissioning nuclei are also plotted in the same figure for comparison.…”

Section: Calculation Of Deformation Parametermentioning

confidence: 99%

Correlations of fission fragment angular momentum with collective and intrinsic degrees of freedom

Naik

Datta

Dange

et al. 1988

Z. Physik A - Atomic Nuclei

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In the present work angular momenta of the fragments corresponding to 132Im'g have been deduced from the radiochemically determined independent isomeric yield ratios and statistical model based analysis in neutron induced fission of 235U, 239pu and 245Cm and spontaneous fission of 252Cf. These data along with similar data on 134I, reported earlier from this laboratory, bring out the effects of deformed 66n and spherical 82n shells on fragment angular momentum showing also an inverse correlation of the latter with elemental yields. Quantitative estimates of fragment scission point deformation and the coefficient of change of fragment angular momentum with kinetic/excitation energy have been deduced and are seen to be in good agreement with the expected theoretical estimates.

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“…The two Figure 1. Calculated charge distribution compared with experimental data taken from [15][16][17]. The configurations allowed in the (β 1 , β 2 ) plane are chosen such that the quasifission barrier is greater than 1.15 MeV.…”

Section: Modelmentioning

confidence: 99%

Energy dependence of fission observables

Paşca

2016

EPJ Web of Conferences

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Abstract. The mass, charge and isotopic distributions of fission fragments are studied within an improved scission-point statistical model in the reaction 235 U+n at different energies of the incident neutron. The available experimental data are well reproduced and the energy-dependencies of the observable characteristics of fission are predicted for future experiments. The calculated mass distribution of 238 U+n is also compared with experimental data.

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Charge distributions in low-energy nuclear fission and their relevance to fission dynamics

Cited by 94 publications

References 12 publications

Influence of fission fragment nuclear structure on scission configuration in252Cf (S.F.)

Influence of fission fragment nuclear structure on scission configuration in252Cf (S.F.)

Correlations of fission fragment angular momentum with collective and intrinsic degrees of freedom

Energy dependence of fission observables

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