Photodisintegration of three- and four- nucleon systems

Sandhas, W.; Schadow, W.; Ellerkmann, G.; Howell, Larry L.; Sofianos, S. A.

doi:10.1016/s0375-9474(98)00024-4

Cited by 14 publications

(24 citation statements)

References 75 publications

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“…At the two lower energies the cross section maximum is decreased by adding the 3NF. A related effect has been seen before in [20] using different NN forces. Thereby it was found, that with increasing binding energy the value of the maximum decreased.…”

Section: Results For Pd (Nd) Photodisintegration Of 3 He ( 3 H)supporting

confidence: 75%

Search for three-nucleon force effects in two-body photodisintegration of3He(3H)and in the t

Skibiński¹,

Golak²,

Kamada³

et al. 2003

Phys. Rev. C

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Faddeev calculations have been performed for nucleon-deuteron photodisintegration of 3 He ( 3 H) and proton-deuteron radiative capture. The bulk of the results is based on the AV18 nucleon-nucleon force and the Urbana IX threenucleon force together with explicit exchange currents or applying the Siegert approach. Three-nucleon force effects are predicted for both processes and are qualitatively supported by available data. 21.45.+v, 24.70.+s, 25.10.+s, 25.40.Lw

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Section: Results For Pd (Nd) Photodisintegration Of 3 He ( 3 H)supporting

confidence: 75%

Search for three-nucleon force effects in two-body photodisintegration of3He(3H)and in the t

Skibiński¹,

Golak²,

Kamada³

et al. 2003

Phys. Rev. C

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“…There is a small potential dependence of σ and, hence, of A 0 similar to the one observed in the corresponding photoprocess [13,14]. In view of the errorbars, the experimental data by Belt et al [1] and King et al [2,3] are reproduced for all potentials with the same quality.…”

supporting

confidence: 57%

“…In [13,14] we have shown that for different potentials the low-energy peak heights of the 3 He photodisintegration cross sections are strictly correlated with the corresponding 3 He binding energies, and with the number of partial waves included. The magnitude of the present radiative capture process, i.e., the constant A 0 , appears to be similarly fixed by the three-body binding energy.…”

mentioning

confidence: 95%

“…In all cases there is good agreement between theory and experiment. As pointed out in [13,14] this agreement can only be achieved by taking onto account E1 and E2 contributions of the electromagnetic interaction, meson exchange currents, and higher partial waves in the potential and in the three-body wave function. It should be mentioned that for increasing energies the peak is slightly shifted to the right-hand side, because of a smaller E1 and a somewhat higher E2 contribution.…”

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confidence: 96%

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Radiative capture of protons by deuterons

Schadow

Sandhas

1999

Phys. Rev. C

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The differential cross section for radiative capture of protons by deuterons is calculated using different realistic NN interactions. We compare our results with the available experimental data below Ex = 20 MeV. Excellent agreement is found when taking into account meson exchange currents, dipole and quadrupole contributions, and the full initial state interaction. There is only a small difference between the magnitudes of the cross sections for the different potentials considered. The angular distributions, however, are practically potential independent. PACS numbers(s): 21.45.+v, 25.40.Lw, 27.10.+h The radiative capture of protons by deuterons and the inverse reaction, the photodisintegration of 3 He, have been investigated experimentally and theoretically over the last decades with quite some interest. Despite the various corresponding investigations, the theory is only in rough agreement with experiment, and there are inconsistencies between the data up to 30% in the magnitudes of the cross sections From the theoretical side several attempts have been made to describe the cross sections in this energy region. In the early calculations by Barbour et al. [6] phenomenological interactions were used. It was shown that the final state interaction is quite important, and that the E2 contributions in the electromagnetic interaction are needed in the differential cross section. In the calculations by Gibson and Lehman [7] a more realistic Yamaguchi interaction, but only the E1 components were employed. King et al. [2] performed an effective two-body, direct capture calculation with the initial state being treated as a plane wave, or as a scattering state generated from an optical potential. Fonseca and Lehman [8] calculated the polarization observables A yy and T 20 at the excitation energy E x = 14.75 MeV including only the E1 interaction. A calculation at E x = 15 MeV based on realistic interactions and both, the E1 and E2 contributions has been done by Ishikawa and Sasakawa [9]. Another calculation of A yy in this energy region is by Jourdan et al. [10]. It was found in all these investigations that T 20 is independent of the deuteron and the helium D-state probability, whereas A yy shows a weak dependence on these quantities.Very-low-energy radiative capture processes are of considerable astrophysical relevance. The p-d radiative capture, which at such energies is almost entirely a magnetic dipole (M1) transition, was studied in plane wave (Born) approximation by Friar et al. [11]. In these investigations the authors employed their configuration-space Faddeev calculations of the helium wave function, with inclusion of three-body forces and pion exchange currents. Various trends, e.g., the correlation between cross sections and helium binding energies, and their potential dependence were pointed out. More recently a rather detailed investigation of such processes has been performed by Viviani et al. [12]. Their calculations employed the quite accurate three-nucleon bound-and continuum states obtained in the ...

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“…Recently, the Bonn group used the modern nucleon-nucleon forces. In these works, the current was restricted to the dominant E 1 multipole [6] or to the E 1 and E 2 multipoles [7]. They compared the Faddeev approach and a hyperspherical harmonic expansion together with the Lorentz integral transform method using AV18 together with Urbana IX.…”

Section: Introductionmentioning

confidence: 99%

Triton Photodisintegration with Effective Field Theory

Sadeghi

Bayegan

2009

Few-Body Syst

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Effective field theory (EFT) has been recently used for the calculation of neutron-deuteron radiative capture at very low energies.We present here the use of EFT to calculate the two-body photodisintegration of the triton, considering the three-body force. The calculated cross section shows sharp rising from threshold to maximum about 0.88 mb at 13 MeV and decreasing slightly to about 0.81 mb at 19 MeV, in agreement with the experimental data. Our results are in good agreement with the experimental data and the other calculations using modern realistic two- and three-nucleon forces, like AV18/UrbanaIX potential.Comment: 10 pages, 5 figures, 2 tables. Major changes, version to appear in Few-Body System

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Photodisintegration of three- and four- nucleon systems

Cited by 14 publications

References 75 publications

Search for three-nucleon force effects in two-body photodisintegration of3He(3H)and in the t

Search for three-nucleon force effects in two-body photodisintegration of3He(3H)and in the t

Radiative capture of protons by deuterons

Triton Photodisintegration with Effective Field Theory

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