HEPData Search

Showing 10 of 2896 results

The ratio of π° photoproductions from neutrons and protons in deuterium in the energy range of 700 to 1100 mev.

CIT-12, 1962.

Inspire Record 44258 DOI 10.17182/hepdata.37218

The ratio of the cross sections for photoproduction of neutral pions from neutrons to that from protons has been obtained at average photon energies of 750, 875, and 1050 mev at a pion CM angle of 60° and at average photon energies of 875 and 1050 mev at a pion CM angle of 90°. The experimental technique required simultaneous detection of both the pions and the nucleons. Pions were detected by three scintillation counters. Lead plates of 2.4 radiation lengths and 1.2 radiation lengths were placed in front of the second and third counters. Neutral pions were identified by the absence of output in the first counter and the large outputs in the second and third counters. Nucleons were detected in two scintillation counters. The second of the two counters is 11” thick and has approximately 20% efficiency of detecting neutrons. Neutrons were identified by the absence of output in the first counter. The energy of the incident photons was determined by synchrotron subtraction. Since the statistical accuracy of synchrotron subtraction is poor, a system of three fast coincidence circuits was used as a time-of-flight instrument to reduce the number of events initiated by low energy photons. The statistical errors assigned to the ratio range between 15-30%. The results of this experiment agree with the results of Bingham within statistical errors, but show a general tendency for the σ^(no)/ σ^o ratio to lower. The ratio of σ^(no)/ σ^o obtained in this experiment ranges between 0.4 and 0.8. The cross sections for neutral pion photoproduction from neutrons are derived from the σ^(no)/ σ^o ratio and the Caltech data on neutral pion photoproduction from hydrogen.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Low-Energy Charged Meson Photoproduction

Walker, J.K. ; Burq, J.P. ;

Phys.Rev.Lett. 8 (1962) 37-40, 1962.

Inspire Record 944906 DOI 10.17182/hepdata.19549

None

1 data table

Table 1

No description provided.

Neutral Pion Production by 960-Mev Negative Pions

Weinberg, A. ; Brenner, A.E. ; Strauch, K. ;

Phys.Rev.Lett. 8 (1962) 70-72, 1962.

Inspire Record 944905 DOI 10.17182/hepdata.162

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

SCATTERING OF 310-Mev POSITIVE PIONS BY PROTONS: EXPERIMENTS AND ANALYSIS

Rogers, Ernest H. ;

UCRL-10127, 1962.

Inspire Record 44325 DOI 10.17182/hepdata.18576

None

1 data table

Table 1

No description provided.

High-Energy Proton Scattering from Carbon and Deuterium

Cocconi, G. ; Diddens, A.N. ; Lillethun, E. ; et al.

Phys.Rev. 126 (1962) 277-278, 1962.

Inspire Record 944981 DOI 10.17182/hepdata.26781

The momentum spectra of protons scattered from carbon and deuterium at angles close to 60 mrad and for incident proton momenta between 12 and 27 Gev/c have been measured. The data show good agreement with calculations based on plural quasi-elastic proton-nucleon scattering within the nucleus.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

ELECTRON - PROTON SCATTERING AT LOW MOMENTUM ENERGIES

Lehmann, P. ; Taylor, R.E. ; Wilson, Richard ;

Phys.Rev. 126 (1962) 1183, 1962.

Inspire Record 16521 DOI 10.17182/hepdata.26811

We have measured the electron-proton scattering cross section at 248.9 Mev, 104.81°; 209.6 Mev, 149.75°; and 139.3 Mev, 104.19°. We find the following values: F1=0.767±0.025, F2=0.707±0.028, and F1F2=1.085±0.025 at −q2=2.98 f−2. F=0.902±0.011 at −q2=1.05 f−2. The last result agrees with previous measurements. The others are new contributions.

2 data tables

Table 1

No description provided.

Table 2

No description provided.