Fission Studies of Thorium, Uranium, and Plutonium Isotopes with (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mo>,</mml:mo><mml:mi> </mml:mi><mml:mi>pf</mml:mi></mml:math>) Reactions

Cramer, J.D.; Britt, H. C.

doi:10.1103/physrevc.2.2350

Cited by 69 publications

(61 citation statements)

References 12 publications

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“…The comparison of experimental fission probabilities with statistical model calculations [9] provided also indirect but compelling evidence that the first fission barrier is axially asymmetric for most of the actinide region, as predicted by theoretical calculations of the potential energy surface [10]. In addition, measurements of fission probabilities combined with fission-fragment angular distributions yield information on the properties of the transition states at the two saddle points through which the nucleus may pass on its way to fission [11][12][13][14].…”

Section: Introductionmentioning

confidence: 77%

Fission probabilities ofAm242,Cm243, and

et al. 2015

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Section: Introductionmentioning

confidence: 77%

Fission probabilities ofAm242,Cm243, and

et al. 2015

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“…The latter strategy was followed by Cramer and Britt [8], who detected outgoing protons from (t,pf) reactions on several actinide targets at back angles in order to minimize the effects of the angular correlations on their results. It is not obvious that such angles can be found for all cases of interest.…”

Section: Fission Fragment Angular Distributions and Surrogate Analmentioning

confidence: 99%

“…A simple, approximate version of the Surrogate technique, which we will refer to as the "Surrogate Method in the WeisskopfEwing limit" was already used in the 1970s to estimate neutron-induced fission cross sections from transfer reactions [8][9][10][11][12] and has received renewed attention in recent years [13]. In the work presented here, we will focus on a related approximation, the so-called "Surrogate Ratio Method" or simply the "Ratio Method".…”

Section: Introductionmentioning

confidence: 99%

Determining (n,f) cross sections for actinide nuclei indirectly: Examination of the surrogate ratio method

2006

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The validity of the Surrogate Ratio method for determining (n,f) cross sections for actinide nuclei is examined. This method relates the ratio of two compound-nucleus reaction cross sections to a ratio of coincidence events from two measurements in which the same compound nuclei are formed via a direct reaction. With certain assumptions, the method allows one of the cross sections to be inferred if the other is known. We develop a nuclear reaction-model simulation to investigate whether the assumptions underlying the Ratio approach are valid and employ these simulations to assess whether the cross sections obtained indirectly by applying a Ratio analysis agree with the expected results. In particular, we simulate Surrogate experiments that allow us to determine fission cross sections for selected actinide nuclei. The nuclei studied, 233 U and 235 U, are very similar to those considered in recent Surrogate experiments. We find that in favorable cases the Ratio method provides useful estimates of the desired cross sections, and we discuss some of the limitations of the approach.

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“…Transfer reaction methods as the ones described above are form a kind of surrogate reactions in which the neutron is carried along by a nucleus to react with a target [353,354]. An example of surrogate reactions are (d,p) reactions, which exploits the simplicity of the deuteron structure.…”

Section: Single-particle Ab-initio Methodsmentioning

confidence: 99%

Current Status of Nuclear Physics Research

Bertulani

Hussein

2015

Braz J Phys

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In this review we discuss the current status of research in nuclear physics which is being carried out in different centers in the World. For this purpose we supply a short account of the development in the area which evolved over the last 9 decades, since the discovery of the neutron. The evolution of the physics of the atomic nucleus went through many stages as more data become available. We briefly discuss models introduced to discern the physics behind the experimental discoveries, such as the shell model, the collective model, the statistical model, the interacting boson model, etc., some of these models may be seemingly in conflict with each other, but this was shown to be only apparent.The richness of the ideas and abundance of theoretical models attests to the important fact that the nucleus is a really singular system in the sense that it evolves from two-body bound states such as the deuteron, to few-body bound states, such as 4 He, 7 Li, 9 Be etc. and up the ladder to heavier bound nuclei containing up to more than 200 nucleons. Clearly statistical mechanics, usually employed in systems with very large number of particles, would seemingly not work for such finite systems as the nuclei, neither do other theories which are applicable to condensed matter. The richness of nuclear physics stems from these restrictions. New theories and models are presently being developed. Theories of the structure and reactions of neutron-rich and proton-rich nuclei, called exotic nuclei, halo nuclei, or Borromean nuclei, deal with the wealth of experimental data that became available in the last 35 years. Further, nuclear astrophysics and stellar and Big Bang nucleosynthesis have become a more mature subject. Due to limited space, this review only covers a few selected topics, mainly those with which the authors have worked on. Our aimed potential readers of this review are nuclear physicists and physicists in other areas, as well as graduate students interested in pursuing a career in nuclear physics.

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Fission Studies of Thorium, Uranium, and Plutonium Isotopes with (t, pf) Reactions

Cited by 69 publications

References 12 publications

Fission probabilities ofAm242,Cm243, and

Fission probabilities ofAm242,Cm243, and

Determining (n,f) cross sections for actinide nuclei indirectly: Examination of the surrogate ratio method

Current Status of Nuclear Physics Research

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