Chapter I. Projectile Breakup Processes in Nuclear Reactions

Kamimura, M.; Yahiro, Masanobu; Iseri, Y.; Sakuragi, Y.; Kameyama, H.; Kawai, Mitsuji

doi:10.1143/ptps.89.1

Cited by 321 publications

(402 citation statements)

References 2 publications

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“…The above-mentioned deuteron phenomenological optical model parameter set has been used for the incident channel, while the Koning-Delaroche [14] OMP global parameters have been used for protons interactions with the residual nuclei. The neutron-proton interaction V np was assumed to have a Gaussian shape which parameters were determined from the fit of the deuteron binding energy [15]. The transfered neutron bound states were generated in a Woods-Saxon real potential with global reduced radius of 1.25 fm and diffuseness of 0.65 fm, while its depth has been adjusted to the nucleon binding energies in the residual nuclei.…”

Section: Single-nucleon Strippingmentioning

confidence: 99%

Assessment of deuteron-induced reaction mechanisms at low and medium energies

Avrigeanu

2010

EPJ Web of Conferences

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Abstract. An extended analysis of the nuclear reaction mechanisms involved in the deuterons interaction with 63,65 Cu is presented. First, the available elastic-scattering data analysis provided us the optical potential for reaction cross sections calculations. An increased effort has been devoted to the breakup mechanism, both the elastic breakup and the breakup fusion contributions to the different activation cross sections being carefully considered. Next, the direct reaction contributions through the one nucleon stripping reaction cross sections have been calculated. Finally, the pre-equilibrium and compound-nucleus cross-section calculation, corrected for the breakup and stripping decrease of the total reaction cross section, completed the deuteron activation cross-section analysis. The overall agreement between the measured and calculated deuteron activation cross sections proves the correctness of the nuclear mechanisms account.

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Section: Single-nucleon Strippingmentioning

confidence: 99%

Assessment of deuteron-induced reaction mechanisms at low and medium energies

Avrigeanu

2010

EPJ Web of Conferences

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“…This procedure of discretization is called the average (Av) method. The S-matrix elements calculated with CDCC converge as the modelspace is extended [9]. The converged CDCC solution is the unperturbed solution of the distorted Faddeev equations, and corrections to the solu- * Electronic address: taku2scp@mbox.nc.kyushu-u.ac.jp tion are negligible within the region of space in which the reaction takes place [10].…”

mentioning

confidence: 99%

“…Details of the formalism of CDCC are shown in Ref. [9]. In the Gaussian expansion method (GEM) [13], each Φ γ is given by…”

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confidence: 99%

Continuum-discretized coupled-channels method for four-body nuclear breakup inHe6+C12scattering

et al. 2004

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We propose a fully quantum-mechanical method of treating four-body nuclear breakup processes in scattering of a projectile consisting of three constituents, by extending the continuum-discretized coupled-channels method. The three-body continuum states of the projectile are discretized by diagonalizing the internal Hamiltonian of the projectile with the Gaussian basis functions. For 6 He+ 12 C scattering at 18 and 229.8 MeV, the validity of the method is tested by convergence of the elastic and breakup cross sections with respect to increasing the number of the basis functions. Effects of the four-body breakup and the Borromean structure of 6 He on the elastic and total reaction cross sections are discussed. PACS numbers: 21.45.+v, 21.60.Gx, 24.10.Eq, The study on neutron-halo nuclei has become one of the central subjects in the unstable nuclear physics since the discovery of such nuclei [1]. In scattering of a two-neutron-halo nucleus such as 6 He and 11 Li, the projectile easily breaks up into its three constituents (n+n+core), indicating that the scattering should be described as a four-body (n+n+core+target) reaction. Then an accurate theory for treating such a fourbody breakup is highly desirable.So far the eikonal and adiabatic calculations were proposed and applied to 6 He and 11 Li scattering around 50 MeV/nucleon [2,3,4,5]. Since these calculations are based on semi-classical approaches, they work well at higher incident energies. In fact, the elastic cross section of 6 He+ 12 C scattering at 229.8 MeV has recently been measured [6] and successfully analyzed by the eikonal calculation with the sixnucleon wave function of 6 He [7]. However, these approaches seem not to be applicable for low-energy scattering such as 12 C( 6 He, 6 He) 12 C at 3 MeV/nucleon [8] measured very recently.In this rapid communication, we present a fully quantummechanical method of treating four-body nuclear breakup. The method is constructed by extending the continuumdiscretized coupled-channels method (CDCC) [9] that treats three-body breakup processes in scattering of the two-body projectile. In CDCC, the total scattering wave function is expanded in terms of bound and continuum states of the projectile. The continuum states are classified by the linear (k) and angular momenta, and they are truncated by setting an upper limit to each quantum number. The k-continuum is then divided into small bins and the continuum states in each bin are averaged into a single state. This procedure of discretization is called the average (Av) method. The S-matrix elements calculated with CDCC converge as the modelspace is extended [9]. The converged CDCC solution is the unperturbed solution of the distorted Faddeev equations, and corrections to the solu- * Electronic address: taku2scp@mbox.nc.kyushu-u.ac.jp tion are negligible within the region of space in which the reaction takes place [10].Also for four-body breakup processes in scattering of the three-body projectile, CDCC has to prepare three-body bound and discretized-continuum states of t...

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“…1. The wave function Ψ (−) β in the final channel is obtained by means of the continuum-discretized coupled-channels method (CDCC) [2][3][4]. In CDCC Ψ (−) β is expanded by a set of the wave functions {ψ i C } of 21 C as…”

Section: Modelmentioning

confidence: 99%

“…Thus, the transition matrix of Eq. (1) by solving standard CDCC equations [2][3][4]. In order to obtain the energy distribution of the transfer cross section, we adopt the smoothing method developed for breakup reactions [5]:…”

Section: Modelmentioning

confidence: 99%