A search for T = 12 resonances in p+4He elastic scattering

doi:10.1016/0375-9474(69)90553-3

Nuclear Physics A

Volume 133, Issue 3, 25 August 1969, Pages 537-544

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Abstract

The excitation function of the differential cross section of the ⁴He(p, p)⁴He reaction has been measured for the four laboratory angles 82.3°, 92.3°, 102.3°, and 112.3° at incident proton energies between 22 and 46 MeV. A complete angular distribution for the ⁴He(p, p)⁴He reaction has been measured at 47 MeV incident energy. In addition excitation functions at laboratory angles of 23.5°and 70.0° were measured for the ⁴He(p, d)³He reaction between bombarding energies of 38.5 to 44.6 MeV. The investigation was undertaken to see if any $T = 12$ resonance effects exist in the p+⁴He compound system from possible “states” in ⁵Li around 20, 22 and 25 MeV. No departure from a monotomic energy dependence can be discerned to within the accuracy of the individual experimental points.

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4He(p,d)3He analyzing powers and differential cross sections at 32, 40, 50 and 52.5 MeV
1991, Nuclear Physics, Section A
5Li resonances above the 3He-d threshold
1971, Nuclear Physics, Section A
Starting from a soft-core nucleon-nucleon potential the scattering states of ⁵Li above the ³He-d threshold are calculated using the refined cluster model. Apart from the well-known $32^{+}$ resonance a quartet of $S = 32, L = 2$ ³He-d resonances is found. Furthermore $32^{−} and 12^{−}$ resonances appear in phase-shift and inelastic parameter curves; they are shown to be due to three-body break-up channels connected with an intermediate α^∗-p structure, α^∗ being the first excited state of the ⁴He nucleus.
Optical-model analysis of the scattering of protons from 4He at 31, 40, 46 and 55 MeV
1970, Nuclear Physics, Section A
Optical-model analyses of the p-⁴He reaction was carried out at 31, 40, 46 and 55 MeV. Experimental differential cross section, polarization and total reaction cross-section data were fit simultaneously at each energy. An extensive search was made for an optimum set of optical-model parameters based on fits to the experimental data and consistency at the four energies. Two sets of optimum parameters are given and both exhibit unusually large values of r_I, the surface absorption radius. To compare with a phase-shift analysis carried out below 31 MeV, the complex phase shifts corresponding to the optimum parameter sets are also given.
Theoretical analysis of p+4He reactions at 46.7 MeV
1970, Nuclear Physics, Section A
Using the plane wave Born approximation (PWBA), angular distributions and energy spectra of p+⁴He reactions are analysed taking into account the final state interaction (FSI) between the final state nucleon pair in their relative S-state, Reasonable agreement with angular distributions can be obtained by introducing a lower cutoff in the radial overlap integrals. Effects of the cutoff in the energy spectra are discussed and found to be important. Results of a calculation with the distorted wave Born approximation (DWBA) of the ⁴He(p, d)³He reaction are also presented.
A survey of the alpha-nucleon interaction
1985, Reviews of Modern Physics
He3(p,p)He3 scattering in the energy range 19 to 48 MeV
1984, Physical Review C

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^†: Present address: University of Washington, Seattle, Washington.

^††: On leave of absence from Institute “R. Bošković”, Zagreb, Yugoslavia.

^†††: Present address: Institute “R. Bošković”, Zagreb, Yugoslavia.

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Nuclear Physics A

Abstract

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Phys. Rev.

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Nucl. Phys.

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Phys. Rev.

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Phys. Rev.

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Uspekhi (Sov. Phys.)

Phys. Lett.

Nucl. Phys.

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<sup>4</sup>He(p,d)<sup>3</sup>He analyzing powers and differential cross sections at 32, 40, 50 and 52.5 MeV

<sup>5</sup>Li resonances above the <sup>3</sup>He-d threshold

Optical-model analysis of the scattering of protons from <sup>4</sup>He at 31, 40, 46 and 55 MeV

Theoretical analysis of p+<sup>4</sup>He reactions at 46.7 MeV

A survey of the alpha-nucleon interaction

He3(p,p)He3 scattering in the energy range 19 to 48 MeV