The Feshbach-Kerman-Koonin multistep direct reaction theory

Bonetti, R.; Koning, A. J.; Akkermans, Jos; Hodgson, P. E.

doi:10.1016/0370-1573(94)90153-8

Cited by 48 publications

(19 citation statements)

References 59 publications

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“…[10][11][12][13][14][15] for a detailed discussion). In this paper, the analysis of the experimental results has been conducted in the Griffin exciton model [16] of the preequilibrium decay of nuclei.…”

Section: Analysis Of the Resultsmentioning

confidence: 99%

Inclusive cross-sections of (p,xp) and (p,xα) reactions on
Duisebayev
¹
,
Ismailov²,
Boztosun
³

2005
Phys. Rev. C
4
1
3
0
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In this paper, we present new experimental data measured at E p = 29.9 MeV for the inclusive reactions (p, xp) and (p, xα) on nucleus 56 Fe. We investigate the adequacy of the theoretical models in explaining the measured experimental data, and we determine the contributions of multistep direct and multistep compound processes in the formation of the cross-sections. We show that the traditional frameworks are valid for the description of the new experimental data, and our measurements agree with previous measurements for the (p, xp) and (p, xα) reactions on the 54 Fe nucleus. The only exception is within the energy region of E p = 15 and 25 MeV for both reactions, where the cross-section for the 56 Fe nucleus is smaller than the cross-section for the 54 Fe nucleus.

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Section: Analysis Of the Resultsmentioning

confidence: 99%

Inclusive cross-sections of (p,xp) and (p,xα) reactions on
Duisebayev
¹
,
Ismailov²,
Boztosun
³

2005
Phys. Rev. C
4
1
3
0
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“…The quantum preequilibrium model for MSD process is well established and details of the theory can be found in [1,7]. We are content to give the expression of the double-differential cross section corresponding to the onestep emission in the interval…”

Section: One-step Direct Preequilibrium Emission From Spherical Targetsmentioning

confidence: 99%

Microscopic models for direct inelastic scattering and direct preequilibrium emission: nucleon induced reactions

Dupuis

Bauge

Bonneau

et al. 2010

EPJ Web of Conferences

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Abstract.We have developed microscopic models for nucleon induced inelastic scattering and one-step direct preequilibrium emission. These models are based on reliable effective in-medium two-body interactions and a microscopic description of the ground and excited states of target nuclei. No arbitrary renormalization process enters our analyzes and the predictions are directly compared to experimental data. The nuclear structure information are obtained in the Random Phase Approximation (RPA) framework with the Gogny force, which provides accurate descriptions of spherical nuclei without pairing. For medium energy (50-200 MeV) proton induced reactions, this approach gives very good predictions for direct inelastic scattering and for the first-step in direct preequilibrium emission. The one-step preequilibrium model has also been extended to fast neutron scattering (10-20 MeV) for the 90 Zr target described with RPA theory, and for axially deformed nuclei with a simpler description of the excited states (i.e. particle-hole excitations). Predictions of the reaction model reproduce well experimental data for 90 Zr. For deformed targets ( 232 Th and 238 U), our calculations underestimate the data at high emission energy. The cross section missing for both actinides may stem from the excitation of vibrational states with excitation energies lower than 5 MeV which are not described with incoherent particle-hole excitations. This defect might be cured if the target spectra are described within the Quasi-particle-RPA (QRPA) theory recently implemented with the Gogny force.

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“…The ratio of the twophonon to one-phonon excitations is approximately 0.1 at incident energies lower than 30 MeV and the two-phonon cross section can easily be evaluated by the method of [7]. The cross section for the incoherent MSD excitation of particle-hole pairs is given by the FKK formulas (5) [and formula (15) in [19]]. The reduced angular distributions of emitted neutrons in (5) were calculated using the DwUcK-4 code [24] with microscopic two-particle form factor.…”

Section: Sectionsmentioning

confidence: 99%

“…The MSD and the preequilibrium MSC reaction cross sections were calculated according to the FKK theory which has been modified in order to account for the gradual absorption [11]of the projectile fiux, a phenomenon accompanying MSD reactions [12,13]. The FKK theory has been described in [14] and the references contained therein as well as in a recent review article [15].Here, in Sec. II, we describe only the modification due to gradual absorption into the quasibound states involved in the successive stages of the MSC reaction.…”

Section: Introductionmentioning

confidence: 99%

Collective reactions to the continuum in neutron scattering by niobium

et al. 1995

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The preequilibrium cross sections for the direct excitation of collective states, including giant resonances, in the continuum region, are calculated and combined with the multistep direct, multistep compound, and cornpound nucleus cross sections to give a complete analysis of neutron scattering by niobium. These collective cross sections we calculated in the framework of DWBA. A good description of neutron emission spectra and angular distributions has been obtained at incident energies 14.1, 20, and 25.7 MeV.PACS number(s): 24. 10. Eq, 24.30.v, 25.40.Ny, 27.60.+j

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The Feshbach-Kerman-Koonin multistep direct reaction theory

Cited by 48 publications

References 59 publications

Inclusive cross-sections of (p,xp) and (p,xα) reactions on
Duisebayev
¹
,
Ismailov²,
Boztosun
³

2005
Phys. Rev. C
4
1
3
0
View full text Add to dashboard Cite

Inclusive cross-sections of (p,xp) and (p,xα) reactions on
Duisebayev
¹
,
Ismailov²,
Boztosun
³

2005
Phys. Rev. C
4
1
3
0
View full text Add to dashboard Cite

Microscopic models for direct inelastic scattering and direct preequilibrium emission: nucleon induced reactions

Collective reactions to the continuum in neutron scattering by niobium

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The Feshbach-Kerman-Koonin multistep direct reaction theory

Cited by 48 publications

References 59 publications

Inclusive cross-sections of (p,xp) and (p,xα) reactions onDuisebayev1, Ismailov2, Boztosun3 2005Phys. Rev. C4130View full textAdd to dashboardCite

Inclusive cross-sections of (p,xp) and (p,xα) reactions onDuisebayev1, Ismailov2, Boztosun3 2005Phys. Rev. C4130View full textAdd to dashboardCite

Microscopic models for direct inelastic scattering and direct preequilibrium emission: nucleon induced reactions

Collective reactions to the continuum in neutron scattering by niobium

Contact Info

Product

Resources

About

Inclusive cross-sections of (p,xp) and (p,xα) reactions on
Duisebayev
¹
,
Ismailov²,
Boztosun
³

2005
Phys. Rev. C
4
1
3
0
View full text Add to dashboard Cite

Inclusive cross-sections of (p,xp) and (p,xα) reactions on
Duisebayev
¹
,
Ismailov²,
Boztosun
³

2005
Phys. Rev. C
4
1
3
0
View full text Add to dashboard Cite