PI+ HE3 --> INELASTIC
Max results
Sort by Reverse order

Showing 2 of 2 results

Pion absorption on He-3 and He-4 with emission of three energetic protons.

The LADS collaboration Lehmann, A. ; Androic, D. ; Backenstoss, G. ; et al.
Phys.Rev.C 55 (1997) 2931-2950, 1997.
Inspire Record 440453 DOI 10.17182/hepdata.25724

Results from a 4π solid angle measurement of the reactions 3He(π+,ppp) and 4He(π+,ppp)n at incident pion energies of Tπ+=70, 118, 162, 239, and 330 MeV are presented. For 3He the total absorption cross sections and their decomposition into two-proton and three-proton components are evaluated; for 4He the three-proton absorption cross sections are given. The differential distributions of the three-proton multinucleon absorption mode of both nuclei are analyzed and compared to each other by making use of a complete set of variables. The data are investigated for signatures of initial and final state interactions: it is found that more than half of the three-proton yield cannot be accounted for by cascade mechanisms. The remaining strength shows dependence on the incident pion angular momentum, but also structures that are not explained by simple semiclassical models.

3 data tables
Table 1

Absorption cross section. Total errors are presented.

Table 2

First and second errors are due to fits and normalization uncertainties, respectively.

Table 3

First and second errors are due to fits and normalization uncertainties, respectively.


Inclusive inelastic scattering of 96.5-MeV pi+ and pi- by the hydrogen and helium isotopes

Khandaker, M.A. ; Doss, M. ; Halpern, I. ; et al.
Phys.Rev.C 44 (1991) 24-36, 1991.
Inspire Record 323112 DOI 10.17182/hepdata.26156

Spectra, angular distributions, and integrated cross sections for inclusive inelastic scattering of 96.5-MeV π+ and π− from H2, He3, and He4 are presented. The measurements were made using a high-pressure gas cell, which permits an accurate determination of relative cross sections for all targets. The data are compared with distorted-wave impulse-approximation calculations and with a modified plane-wave impulse-approximation calculation. In addition, by combining the total inelastic cross sections from this work with estimates of single-charge-exchange cross sections and with published values and reasonable estimates of the other π+ cross sections at the same energy, values for total reaction and pion absorption cross sections are obtained for all the targets. The dependence of these cross sections on Z, N, nuclear density, and nuclear binding energy is discussed in terms of a simple model.

2 data tables
Table 1

No description provided.

Table 2

No description provided.