Charge-exchange p3H → n3He and elastic p3H → p3H differential cross sections at medium energy

doi:10.1016/0375-9474(80)90043-3

Nuclear Physics A

Volume 338, Issue 2, 14 April 1980, Pages 451-462

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Abstract

The Saturne I quasi-monokinetic triton beam has been used to measure the p³H → n³He differential cross section at 415 and 600 MeV per nucleon and the p³H → p³H differential cross section at 415 MeV per nucleon. We covered the four-momentum transfer squared t domain from 0 down to −0.7 GeV/c)². A spin-independent Glauber-model interpretation of the data is discussed.

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Cross sections and analyzing powers for the radiative capture of polarized protons by tritium have been measured at energies of 227, 300, and 375 MeV. The cross-section results are in good accord with data taken for the inverse photodisintegration reaction assuming detailed balance which indicates there is no violation of time-reversal invariance. The experimental results are compared with distorted wave impulse approximation calculation and it is found that the inclusion of meson exchange current effects is important in this energy range.
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Various determinations in the current literature of the π³He³H coupling constant are reexamined, and the ones leading to very low values are shown either to be erroneous or not decisive and implausible. A dispersion relation and the impulse approximation which use the same kind of approximations both lead to G_π−³He−³H(−m²_π) ≈ −1.7, in absolute value higher than the elementary nucleon value g_πpn(−m²_π)=1.41.
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^∗: CNRS.

^∗∗: “Thèse d'État”, to appear (University of Caen).

^∗∗∗: Present address: Physics Department, UCLA, Los Angeles 90024 Cal, USA.

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Nuclear Physics A

Abstract

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Cross section and analyzing powers for the reaction p<sup>3</sup>H → γ<sup>4</sup>He at E<inf>p</inf> = 227, 300 and 375 MeV

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Joint analyses of medium energy p<sup>3</sup>H → p<sup>3</sup>H, p<sup>3</sup>He → p<sup>3</sup>He and p<sup>3</sup>H → n<sup>3</sup>He reactions using a spin-dependent glauber model

Optical model calculation of elastic and charge exchange scattering of protons from trinucleons

Investigation of the reactions <sup>3</sup>H+p to <sup>3</sup>He+n and <sup>3</sup>H+p to <sup>3</sup>H+p at a triton momentum of 2.5 GeV/c

The π<sup>3</sup>He<sup>3</sup>He coupling constant and the p<sup>3</sup>H → n<sup>3</sup>He charge exchange