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NEUTRON - PROTON ELASTIC SCATTERING FROM 2-GeV/c TO 7-GeV/c

Perl, Martin L. ; Cox, Jack ; Longo, Michael J. ; et al.

Phys.Rev.D 1 (1970) 1857, 1970.

Inspire Record 54902 DOI 10.17182/hepdata.69198

Direct measurements were made of neutron-proton elastic scattering differential cross sections at high energies. A neutron beam with a continuous momentum spectrum between 1.2 and 6.7 GeV/c was scattered off a liquid hydrogen target, and spark chambers were used to determine the neutron scattering angle and, in a proton spectrometer, to measure the momentum and scattering angle of the recoil proton. Differential cross sections are presented over the incident neutron momentum range in intervals of the order of 0.5-GeV/c wide. The cross sections have an exponential peak in the forward direction and then flatten and become isotropic about the 90° c.m. scattering angle. At larger angles, the cross sections again rise towards the expected charge-exchange peak, which was not within the range of this experiment. There is little evidence of any other structure in the cross section. Values are presented for the slope of the diffraction peak, and comparisons are made between these slopes, and the 90° c.m. cross sections, for pp and np elastic scattering. The results presented here differ from those previously reported because of an error in a Monte Carlo calculation and in the availability of improved data on the real part of the np elastic scattering amplitude. At 5 GeV/c, a direct comparison of pp and np data allows the I=0 differential cross section to be extracted. The np data have been fitted in powers of cosθc.m. for |cosθc.m.|<0.8 for each energy range.

9 data tables

Table 1

No description provided.

Table 2

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Table 3

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Neutron-proton elastic scattering in the forward direction between 4 and 16 gev

Engler, J. ; Horn, K. ; Konig, J. ; et al.

Phys.Lett.B 29 (1969) 321-323, 1969.

Inspire Record 56753 DOI 10.17182/hepdata.28979

The differential cross-section for the elastic neutron-proton-scattering has been measured for neutron energies between 4 and 16 GeV and | t | from 0.3 to 1.3 (GeV/ c ) 2 . The results can be fitted by exp( A + Bt ), where B increases slightly with energy indicating shrinkage. The values of B for n−p scattering are in good agreement with the corresponding data for p−p scattering.

1 data table

Table 1

'1'. '2'. '3'. '4'.

Neutron-proton elastic scattering from 3 to 10 gev

Besliu, C. ; Besliu, T. ; Constantinescu, A. ; et al.

Nuovo Cim.A 59S10 (1969) 1-8, 1969.

Inspire Record 58947 DOI 10.17182/hepdata.37480

None

1 data table

Table 1

'1'. '2'. '3'.

NEUTRON - PROTON ELASTIC SCATTERING 8-GeV/c TO 30-GeV/c

Gibbard, Bruce G. ; Jones, Lawrence W. ; Longo, Michael J. ; et al.

Phys.Rev.Lett. 24 (1970) 22-24, 1970.

Inspire Record 52711 DOI 10.17182/hepdata.21622

The differential cross section for neutron-proton elastic scattering was measured in the diffraction region with incident-neutron momenta between 8 and 30 GeV/c. The experiment was a spark-chamber-counter experiment, conducted at the alternating-gradient synchrotron. Results are presented and compared with currently available lower energy np data and comparable energy pp data.

1 data table

Table 1

No description provided.