The production of He3 from deuteron interactions at 650 MeV

doi:10.1016/0029-5582(64)90347-5

Nuclear Physics

Volume 57, 1964, Pages 499-508

https://doi.org/10.1016/0029-5582(64)90347-5 Get rights and content

Abstract

The angular distributions of He³ particles produced in association with one pion in the interaction of 650 MeV deuterons (a) with protons and (b) with individual nucleons from deuterium target nuclei have been measured in the forward direction. The differential cross-sections at 0° in the c.m. system were found to be 11.6±0.5 μb·sr⁻¹ and 18.7±1 μb·sr⁻¹, respectively.

The interaction of deuterons with deuterons producing He³ particles and neutrons has also been investigated and at 0° yields a cross-section of $78±5 μ b ∔ sr^{−1}$ in the c.m. system.

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Cited by (20)

A relativistic and unitary theory for the systems of NNN-πNNN and pd-3He π0(tπ+) reaction in the Δ energy region
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A relativistic and unitary theory for the systems of NNN-πNNN in the Δ production energy region is presented. The systems are approximated by the multi-, three- and two-body systems which couple through multi-channel two-body interactions. A Faddeev-type equation is given in the form of one-variable integral equation in the three dimensions, while equivalent to the four-dimensional convariant form. The equation describes all the reactions among the Nd, ³He(t)π, NNN and Ndπ systems in a unified way.
An application is made to pd-³He π⁰(tπ⁺) reaction with the approximation that the NNΔ system dominates in the intermediate state through the J^P = 2⁺ isotriplet-dibaryonic two-body interaction. A remarkable finding is that the $J^{P} = 52^{+}$ amplitude makes an anticlockwise loop in the Argand plot with its magnitude maximum about 30 MeV below the NNΔ threshold, suggesting the existence of a quasi-bound state of the NNΔ system. Furthermore, the origin for a spike structure in the energy dependence of the tensor polarization of deuteron at T_d = 400–600 MeV is explained.
Deuteron tensor analyzing power for the collinear dp → 3Heπ0 reaction at intermediate energies
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The differential cross section and tensor analyzing power T₂₀ for $p(d p →^{3} He π^{0}$ have been measured in the forward and backward directions at 19 energies between 500 MeV and 2.2 GeV. Significant structure in T₂₀ at 180° is related to the observed anomalous proton analyzing power. The large negative T₂₀ measured at low energies confirms that the capture of stopping pions on isoscalar nucleon pairs in ³He is about an order of magnitude stronger than for isovector pairs.
Connected kernel equations for the coupled πNNN-NNN systems
1983, Nuclear Physics, Section A
Starting from a realistic hamiltonian describing the system of three nucleons and a pion, we have derived for the first time a set of integral equations for the coupled πNNN-NNN system. Specifically, the disconnected structure originating from the explicit consideration of the absorption and emission of the pion by nucleons, which is outside the scope of the ordinary many-body potential scattering theories, has been carefully studied. The final equations thus found, have connected kernels, respect time-reversal invariance and should allow one to study various processes like ³He−π^± elastic scattering, $pd →^{3} He −π^{−}, pd → NNN$ etc. in a unified and unitary manner.
p + 3He elastic backward scattering at intermediate energies
1981, Physics Letters B
The p ³He elastic backward scattering cross sections have been measured in the laboratory kinetic energy range 700 ⩽ T_p ⩽ 1700 MeV for backscattered proton angle 160° < θ_p < 180° in the c.m. A change in the slope of the cross sections and a bump in the 180° excitation function are observed around T_p = 1300 MeV. These features are explained are explained as due to baryonic excitation in intermediate states.
Pion production in nuclei: Things known and unknown
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^†: Present address: Euratom, Brussels, Belgium.

^††: Present address: Cornell University, Ithaca, New York, U.S.A.

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Nuclear Physics

Abstract

References (6)

Phys. Rev.

Phys. Rev.

JETP (Soviet Physics)

Cited by (20)

A relativistic and unitary theory for the systems of NNN-πNNN and pd-<sup>3</sup>He π<sup>0</sup>(tπ<sup>+</sup>) reaction in the Δ energy region

Deuteron tensor analyzing power for the collinear dp → <sup>3</sup>Heπ<sup>0</sup> reaction at intermediate energies

Connected kernel equations for the coupled πNNN-NNN systems

p + <sup>3</sup>He elastic backward scattering at intermediate energies

Pion production in nuclei: Things known and unknown

A study of the reaction p+d → <sup>3</sup>He+π<sup>0</sup> in the resonance region