Two-body photodisintegration of 3He

doi:10.1016/0375-9474(83)90197-5

Nuclear Physics A

Volume 410, Issue 2, 28 November 1983, Pages 173-179

https://doi.org/10.1016/0375-9474(83)90197-5 Get rights and content

Abstract

The two-body photodisintegration cross section on ³He has been measured at excitation energies between 21 and 32 MeV and at several angles, using the inverse ²H(p, γ₀)³He reaction. The angular distribution coefficients seem to be dependent on the ⁴D and ²S' components of the three-body ground-state wave function.

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Cited by (16)

P+D radiative capture and mesonic effects
2008, Progress in Particle and Nuclear Physics
We have measured precise data for the vector- and tensor-analyzing powers of the radiative capture reaction p+d→³He+γ at deuteron energies of 29 MeV and 45 MeV. These data are compared to modern three-body calculations that treat both the bound and the continuum state exactly. We show that the analyzing powers exhibit very large effects of meson exchange currents, despite the fact that the momentum transfers involved are very small. The MEC are well described by theory. We also find that, at extreme angles, relativistic effects are important.
p+D radiative capture
2000, Progress in Particle and Nuclear Physics
Tensor analyzing power A<inf>yy</inf> of d→-p radiative capture
1998, Nuclear Physics A
Proton-deuteron radiative capture has been studied with polarized deuterons at a laboratory deuteron energy E_d = 45 MeV. Precise data for the tensor analyzing power A_yy have been measured in the angular range 50° to 160°. Three-nucleon Faddeev wave functions in the initial scattering and final bound state are calculated using realistic nucleon-nucleon potentials. Mesonic exchange currents are included according to Siegert's theorem. Comparison to other recent experimental data is performed as well.
Two-body photodisintegration of 3H and 3He near the giant resonance. (I). Plane-wave approximation
1992, Nuclear Physics, Section A
A concise survey of the current status of two-body photodisintegration of the trinucleons in the region of the giant resonance is presented. Calculations neglecting both final-state interactions (FSI) and M1 transitions are presented using the Reid soft-core, Paris and Bonn potentials. D-wave contributions to these reactions are not in agreement in the literature. The present results indicate that approximately (10±4)% of the cross section is due to constructive transitions involving the D-waves. Furthermore, E2 contributions at a photon excitation energy of ∼ 12.5 MeV are found to be approximately 2% for ³He(γ,p)d and 0.1% for ³H(γ,n)d. In addition, fore-aft asymmetry calculations indicate markedly different contributions from E1–E2 interference in a comparison of the ³He and ³H systems.
Proton and deuteron radiative capture in light nuclei
1988, Nuclear Physics, Section A
Differential capture $^{16} O (p, γ_{x})^{17} F$ and $^{15} N (d, γ_{x})^{17} O$ cross sections have been measured at excitation energies between 17 and 41 MeV in ¹⁷F and 26 and 39 MeV in ¹⁷O at several angles in the 35°–135° interval. The (p, γ_o) data show, besides a direct capture term, the excitation of giant dipole resonances based on excited states having a probable 2p-1h structure. The main features of the deuteron capture cross section can be understood in terms of a semidirect mechanism with the two nucleons captured in the same single-particle configuration.
p-d Radiative capture and the 3He D-state
1986, Nuclear Physics, Section A
The tensor analyzing power A_yy(θ) of the reaction ¹H( $d$ , γ)³He has been measured at θ_lab = 90° and projectile energies of 29.2 and 45.3 MeV. The reaction proceeds mainly through an E1 transition from the unbound $^{2} P_{12}$ and $^{4} P_{32}$ proton-deuteron states to the bound ³He ground state. The tensor analyzing power arises from the interference of the transitions to the ³He S- and D-states and offers an ideal way to check the D-state wave functions predicted by Faddeev calculations. Effects of meson-exchange currents are small. An exact Faddeev calculation has been performed for both continuum and bound states using the RSC interaction. The comparison with experiment shows that in the region 2–5 fm the calculated D-state wave function is too large by ∼20%.

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^☆: Work supported by INFN.

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Nuclear Physics A

Abstract

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Cited by (16)

P+D radiative capture and mesonic effects

p+D radiative capture

Tensor analyzing power A<inf>yy</inf> of d<sup>→</sup>-p radiative capture

Two-body photodisintegration of <sup>3</sup>H and <sup>3</sup>He near the giant resonance. (I). Plane-wave approximation

Proton and deuteron radiative capture in light nuclei

p-d Radiative capture and the <sup>3</sup>He D-state

Two-body photodisintegration of 3He☆

Abstract

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Nucl. Instr.

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Nucl. Phys.

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Can. J. Phys.

Helv. Phys. Acta

Phys. Rev.

Two-body photodisintegration of ³He☆