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Tracy, B.L.; Chaumont, J.; Klapisch, R.; Nitschke, J. M.; Poskanzer, A. M.; Roeckl, E.; Thibault, C.

doi:10.1103/physrevc.5.222

Cited by 96 publications

(54 citation statements)

References 26 publications

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“…The main features of the global Z even-odd effect in prompt emission [1][2][3] are similar with those in fission fragment charge yields Y(Z) [6][7][8][9]:…”

Section: Basic Features Of the Global Z Even-odd Effect In Prompt Emisupporting

confidence: 51%

“…We have studied even-Z nuclei fissioning spontaneously or induced by thermal neutrons, like 233,235 U(n,f), 234 U(n,f), 239 Pu(n th ,f), 236,238,240,242,244 Pu(SF), 252 Cf(SF), because the extensive studies (e.g., [6][7][8][9]) regarding the Z even-odd effect in fragment distributions showed that the effect is most pronounced for this type of nuclei.…”

Section: Introductionmentioning

confidence: 99%

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Local and global even-odd effects in prompt emission in fission

Giubega

Tudora

Hambsch³

2017

EPJ Web Conf.

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Abstract. The investigation of the proton even-odd effects in prompt emission in fission for even-Z actinides revealed basic features of the global even-odd effect in prompt emission similar with those in fission fragment yields and some particular aspects, such as: (1) the even-odd effects in prompt emission are the result of two contributions: a dominant intrinsic even-odd effect due to the even-odd nuclear character of fragments reflected in their properties and a weak even-odd effect caused by the fragment distributions (over which the multi-parametric matrices are averaged); (2) oscillations with a periodicity of about 5 mass units are present in different prompt emission quantities corresponding to even-Z and odd-Z fragmentations independent on the size of the even-odd effect in the charge yield Y(Z). These oscillations are due to the periodicity of nuclear properties of fragments; (3) a local even-odd effect in prompt emission quantities has been recently investigated. Similarities between prompt emission quantities and fragment yields were found in the case of the local even-odd effect, too. The local even-odd effect in both fragment charge yields and prompt emission quantities exhibit a pronounced increase at asymmetry values corresponding to fragmentations in which the heavy fragment (Z = 50 and/or N = 82) or the light one (Z = 28) is magic.

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“…The main features of the global Z even-odd effect in prompt emission [1][2][3] are similar with those in fission fragment charge yields Y(Z) [6][7][8][9]:…”

Section: Basic Features Of the Global Z Even-odd Effect In Prompt Emisupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Local and global even-odd effects in prompt emission in fission

Giubega

Tudora

Hambsch³

2017

EPJ Web Conf.

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“…The staggering effect was first investigated long time ago in the fission of actinide nuclei, mainly induced by low-energy neutrons (see e.g. [1,2,3,4,5,6,7,8] and references therein) and it was attributed to the extra energy required to break a pair of protons or neutrons [9]. Experimentally the odd-even effect in fission was found to be less pronounced for neutrons than for protons.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in contrast with fission fragment studies, for other reaction mechanisms the shape of the yield distribution Y sm has to be deduced from the data with some procedure. The first one, introduced by Tracy et al [2] in 1972, has been widely used for long time (see, e.g., [19]), but other treatments have been proposed or can be devised.…”

Section: Introductionmentioning

confidence: 99%

Methods for a quantitative evaluation of odd-even staggering effects

Olmi¹,

Piantelli²

2015

Eur. Phys. J. A

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Abstract. Odd-even effects, also known as staggering effects, are a common feature observed in the yield distributions of fragments produced in different types of nuclear reactions. We review old methods, and we propose new ones, for a quantitative estimation of these effects as a function of proton or neutron number of the reaction products. All methods are compared on the basis of Monte Carlo simulations. We find that some are not well suited for the task, the most reliable ones being those based either on a non-linear fit with a properly oscillating function or on a third (or fourth) finite difference approach. In any case, high statistic is of paramount importance to avoid that spurious structures appear just because of statistical fluctuations in the data and of strong correlations among the yields of neighboring fragments.

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“…The very high statistics gathered for this reaction leads to a relative uncertainty lower than 0.5 % for the most populated fragments and lower than 2 % in the symmetric fission region. Figure 5 represents the local proton even-odd staggering, expressed following the prescription of [8], as a function of Z for the four reactions 234,235,236,238 U (γ,f). A similar trend of an increase of the even-odd effect with the asymmetry of the fission is observed, in accordance with a general phenomenon already observed [9] and explained as the manifestation of the energy sorting mechanism [10] : a common relatively low even-odd effect is observed in the four cases around Z = 46 and is then regularly increasing with the asymmetry.…”

Section: Fission Fragments Identificationmentioning

confidence: 99%

The SOFIA experiment: Measurement of²³⁶U fission fragment yields in inverse kinematics

Grente

Taïeb

Chatillon

et al. 2016

EPJ Web of Conferences

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Abstract. The SOFIA (Studies On FIssion with Aladin) experiment aims at measuring fission-fragments isotopic yields with high accuracy using inverse kinematics at relativistic energies. This experimental technique allows to fully identify the fission fragments in nuclear charge and mass number, thus providing very accurate isotopic yields for lowenergy fission of a large variety of fissioning systems. This report focuses on the latest results obtained with this set-up concerning electromagnetic-induced fission of 236 U.

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Rb and Cs Isotopic Cross Sections from 40-60-MeV-Proton Fission ofU238,T

Cited by 96 publications

References 26 publications

Local and global even-odd effects in prompt emission in fission

Local and global even-odd effects in prompt emission in fission

Methods for a quantitative evaluation of odd-even staggering effects

The SOFIA experiment: Measurement of²³⁶U fission fragment yields in inverse kinematics

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Rb and Cs Isotopic Cross Sections from 40-60-MeV-Proton Fission ofU238,T

Cited by 96 publications

References 26 publications

Local and global even-odd effects in prompt emission in fission

Local and global even-odd effects in prompt emission in fission

Methods for a quantitative evaluation of odd-even staggering effects

The SOFIA experiment: Measurement of236U fission fragment yields in inverse kinematics

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Product

Resources

About

The SOFIA experiment: Measurement of²³⁶U fission fragment yields in inverse kinematics