Eikonal reaction theory for two-neutron removal reactions

Minomo, Kosho; Matsumoto, Takuma; Egashira, Kei; Ogata, Kazuyuki; Yahiro, Masanobu

doi:10.1103/physrevc.90.027601

Cited by 8 publications

(19 citation statements)

References 36 publications

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“…Furthermore, for the present reaction systems, we calculated one-and two-neutron stripping cross sections with ERT. The results will be reported in the forthcoming paper [26]. Figure 2.…”

Section: Analysis Of 6 He Breakup Reactionsmentioning

confidence: 87%

CDCC studies on clustering physics

Matsumoto

Ogata

Minomo

et al. 2014

J. Phys.: Conf. Ser.

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Abstract. The continuum-discretized coupled-channels method (CDCC) has successfully been applied to studies on various reactions involving unstable nuclei. The four-body CDCC method is a new method to calculate three-body breakup continuum in a projectile, which gives an accurate analysis for four-body breakup systems. The eikonal reaction theory is a new approach to calculate inclusive breakup cross sections such as neutron removal cross sections. Moreover, CDCC is a useful tool for evaluation of nuclear data, which are important for nuclear engineering. IntroductionStudy on unstable nuclei is one of the main subject in nuclear physics. Breakup reactions involving such nuclei have played a key role in investigating the exotic properties. The observables such as breakup and neutron removal cross sections reflect information of the ground and resonance continuum states. Furthermore breakup reactions are also useful for searching the cluster structure of nuclei. Therefore in order to understand the exotic properties from the observables, an accurate analysis for describing the breakup mechanism is highly desirable.The continuum-discretized coupled-channels method (CDCC) [1, 2, 3] is one of the most reliable methods for treating breakup processes in exclusive reactions such as elastic scattering, elastic-breakup reactions, and transfer reactions. CDCC has been proposed at first to solve threebody scattering problems, in which a projectile breaks up into two constituents. Recently, there are two important extensions for CDCC. One is a new method to calculate three-body breakup continuum in a projectile, which gives an accurate analysis for four-body breakup systems. This new method is called four-body CDCC [4,5,6,7]. The other is a new approach to calculate inclusive breakup cross sections such as neutron removal cross sections. In the new approach called the eikonal reaction theory (ERT) [8], both nuclear and Coulomb breakup processes are consistently treated by CDCC without making the adiabatic approximation.In SOTANCP3, we reviewed recent studies of CDCC. One is analyses of 6 He breakup reactions and another is an application of CDCC to nuclear engineering. These works have been already reported in the CDCC review paper [3].

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“…Furthermore, for the present reaction systems, we calculated one-and two-neutron stripping cross sections with ERT. The results will be reported in the forthcoming paper [26]. Figure 2.…”

Section: Analysis Of 6 He Breakup Reactionsmentioning

confidence: 87%

CDCC studies on clustering physics

Matsumoto

Ogata

Minomo

et al. 2014

J. Phys.: Conf. Ser.

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“…We first verify that the ERT applied to the DEA leads to similar results for the integrated cross sections as the ones obtained with E-CDCC in Refs. [34,35]. We then extend our analysis to differential cross sections, viz., the energy and parallel-momentum FIG.…”

Section: Introductionmentioning

confidence: 95%

“…Consequently, it is not compatible with the infinite range of the Coulomb interaction [39][40][41]. The idea of the ERT is to exploit this idea and treat the purely nuclear n-T interaction at the adiabatic approximation, while keeping the dynamical treatment of the full c-T potential [34,35]. This is equivalent to assume [V nT ,Ô] = 0 in Eq.…”

Section: Eikonal Reaction Theorymentioning

confidence: 99%

“…For all these systems, they have compared integrated cross sections predicted by this ERT to the ones obtained with the full E-CDCC calculations. The uncertainty of this approximation on the total diffractive-breakup cross sections has been estimated to be within about 5% [34,35].…”

Section: Introductionmentioning

confidence: 98%

“…They have then extended this method to two-neutron knockout in Ref. [35], where they have analyzed the collision of 6 He on the same targets at 240 MeV/nucleon and on 28 Si at 52 MeV/nucleon. For all these systems, they have compared integrated cross sections predicted by this ERT to the ones obtained with the full E-CDCC calculations.…”

Section: Introductionmentioning

confidence: 99%

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Detailed study of the eikonal reaction theory for the breakup of one-neutron halo nuclei

Hebborn

Capel

2021

Phys. Rev. C

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Background: One-neutron removal reactions are used to study the single-particle structure of unstable nuclei, and in particular the exotic halo nuclei. The eikonal reaction theory (ERT) has been developed by Yahiro, Ogata, and Minomo [Prog. Theor. Phys. 126, 167 (2011)] to include dynamical effects, which are missing in the usual eikonal description of these reactions. Encouraging results have been obtained for total breakup cross sections in comparison to more elaborate reaction models. Purpose: We extend these comparisons to more differential breakup cross sections expressed as functions of the relative energy or parallel momentum between the core and halo neutron. Method: ERT predictions of these cross sections are compared to state-of-the-art calculations. Results: The hypotheses upon which the ERT is based are confirmed and their range of validity is made clearer. The actual ordering of the evolution operators affects ERT differential cross sections and a specific choice leads to excellent agreement with the reference calculation. Dynamical effects in the treatment of the neutron-target interaction can be significant in the parallel-momentum observable. Conclusions: The role of the different interactions in the dynamics of breakup reactions of one-neutron halo nuclei are better understood and improvements to the ERT are suggested.

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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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Eikonal reaction theory for two-neutron removal reactions

Cited by 8 publications

References 36 publications

CDCC studies on clustering physics

CDCC studies on clustering physics

Detailed study of the eikonal reaction theory for the breakup of one-neutron halo nuclei

Current Status of Nuclear Physics Research

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