Yields and isomer ratio in A = 134 chain for the spontaneous fission on 252Cf

Erten, H. N.; Birgül, O.; Aras, N. K.

doi:10.1016/0022-1902(78)80107-9

Cited by 12 publications

(4 citation statements)

References 14 publications

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“…In the present work the isomeric yield ratio was defined as the ratio of the independent yield of the highspin isomer to that of the low-spin isomer, σ Η /σ,. The obtained isomeric yield ratios are tabulated in Table 2 together with those obtained by others for the spontaneous fission of 252 Cf [7,8] and for the thermal neutron induced fission of 233 U, 235 U and 239 Pu [8][9][10], It was found that the isomeric yield ratios of 128 Sb and 130 Sb are about the same within the compared systems. This means that at least the final population in the E-J plane which gives the isomeric yield ratio is almost the same among these systems.…”

Section: Resultsmentioning

confidence: 85%

Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of ²⁵²Cf

1995

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Isomeric yield ratios of ,2a Sb(5 + , 8"), ,30 Sb(4 + , 8), l32 I(4 + , 8"), l34 I(4 + , 8"), and 136 I(2", 6") isomer pairs in the spontaneous fission of 252 Cf were measured and the angular momenta J m , of primary fission fragments were deduced from the isomeric yield ratios obtained. The deduced /"," for each nuclide in the spontaneous fission of 252 Cf is about the same as that found in the thermal neutron induced fission. A discussion is made by comparing the angular momenta deduced with those from other various fissioning systems.

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Section: Resultsmentioning

confidence: 85%

Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of ²⁵²Cf

1995

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“…For 134I the yield ratio (F), redetermined in view of the higher resolution gamma spectrometer being available compared to the one used earlier, [6] is 0.55 _+0.07, quite close to the one determined earlier (0.61) [6] indicating the B-value of (11.5_+ 1.1)h. While for 138Cs the B-value is (9.8+1.2)h compared to the reported [5] lower limit of 8.3 b. Figure 1 shows the variation of the fragment angular momentum (B) as a function of the nuclear charge (Z) of the fragments in the heavy mass region, based on the B-values as obtained in the present work for the Z-values 52, 53 and 55 and the literature data [3] on the even Z fragments in 252Cf (S.F.).…”

Section: Discussionmentioning

confidence: 81%

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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“…2 We have also been measuring fission yields of several products in some low energy fissioning systems over the years. [4][5][6][7][8][9] The results of such studies together with recent compilations 2,10 have been used in reevaluating fine structure effects on the mass and charge distributions in low energy fission. AMIEL and FELDSTEIN 11 were the first to carry out a systematic stt:dy of the even-odd effect in the thermal neutron fission of 2 3 s U and 2 3 3 U.…”

Section: Elsevier Sequoia S a Lausannementioning

confidence: 99%

Fine structure of mass and charge distribution in low energy fission

Erten

Aras

1992

Journal of Radioanalytical and Nuclear Chemistry, Articles

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Studies of finer details in mass and charge distribution fission leads to a better understanding of the fission process. Experimental determination of independent and cumulative yields using radiochemical techniques as well as mass spectrometers and fission product recoil separators form the basis of such studies. It has been established that closed shells as well as an even number of nucleons influence both mass and charge distributions. The magnitudes of these effects may be estimated from existing experimental yield data and various fission models. Using our measurements of several fission yields and those existing in the literature we have calculated even-odd proton and neutron effects for various low energy fissioning systems. Where enough data existed, direct calculations were made, whereas for other cases the Zp-model of WAHL has been used. It is found that the even-odd proton effect is well established and pronounced in thermal neutron fission of235U and233U. Lesser effects were found for reactor neutron induced fission of232Th, thermal neutron fission of239Pu and spontaneous fission of245Cm and249Cf. No effect seems to exist in the thermal neutron fission of241Pu and the spontaneous fission of252Cf. The even-odd neutron effect is found to be much lower than the corresponding proton effect in235U and233U fissions and is nonexistent in the rest of the fissioning systems. © 1992 Akadémiai Kiadó

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Yields and isomer ratio in A = 134 chain for the spontaneous fission on 252Cf

Cited by 12 publications

References 14 publications

Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of ²⁵²Cf

Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of ²⁵²Cf

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

Fine structure of mass and charge distribution in low energy fission

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Yields and isomer ratio in A = 134 chain for the spontaneous fission on 252Cf

Cited by 12 publications

References 14 publications

Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of 252Cf

Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of 252Cf

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

Fine structure of mass and charge distribution in low energy fission

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Product

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Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of ²⁵²Cf

Isomeric Yield Ratios of Sb and I Isotopes in Spontaneous Fission of ²⁵²Cf