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CHARGED PIONS FROM THE ISOTOPES NI-58, NI-64 BY 201-MEV PROTONS

Palmeri, A. ; Aiello, S. ; Badala, A. ; et al.

Phys.Rev.C 40 (1989) 1081-1084, 1989.

Inspire Record 287802 DOI 10.17182/hepdata.26182

Charged pion production induced by 201 MeV protons on Ni58 and Ni64 has been studied. The double differential cross sections have been measured over a wide angular range. Different behavior of the angular distribution is observed for low and high energy pions. The yield of positive pions shows a pronounced forward peaked component. The deduced total production yields are about the same for (p,π+) on both isotopes whereas that for (p64,π−) is twice as large as for (p58,π−).

1 data table

Table 1

MOMENTUM ACCEPTANCE OF SPECTROMETER = 2.5 PCT, AND TOTAL EFFICIENCY =0.8 +-0.05. THE TARGET THICKNESS WERE 42.7 +-0.2 AND 41. +-0.2 MG/(CM**2), ENRICHED TO 99.3 AND 98.2 PCT FOR NI58 AND NI64 RESPECTIVELY.

Analyzing Powers in $\pi^\pm P$ (Polarized) Elastic Scattering From $T (\pi$) = 98-{MeV} to 263-{MeV}

Sevior, M.E. ; Feltham, A. ; Weber, P. ; et al.

Phys.Rev.C 40 (1989) 2780-2788, 1989.

Inspire Record 288842 DOI 10.17182/hepdata.26219

Angular distributions of the analyzing powers for π+p→ and π−p→ elastic scattering have been measured in a single-scattering experiment employing a polarized proton target. Measurements were obtained for pion energies of 98, 139, 166, 215, and 263 MeV. The addition of these data to the existing πp database significantly reduces the uncertainties in all S and P phase shifts for πp reactions over the delta resonance.

10 data tables

Table 1

Measured values of the analyzing power for PI+ P elastic scattering at incident kinetic energy 98 MeV.

Table 2

Measured values of the analyzing power for PI+ P elastic scattering at incident kinetic energy 139 MeV.

Table 3

Measured values of the analyzing power for PI+ P elastic scattering at incident kinetic energy 166 MeV.

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One-dimensional and Two-dimensional Analysis of the Factorial Moments in 200-{GeV}/nucleon $P$, $^{16}$O and $^{32}$S Interactions With Ag / Br Nuclei

Holynski, R. ; Jurak, A. ; Olszewski, A. ; et al.

Phys.Rev.C 40 (1989) R2449-R2453, 1989.

Inspire Record 285668 DOI 10.17182/hepdata.26218

Scaled factorial moments, corrected for the shape of the single-particle pseudorapidity distribution, are analyzed in pseudorapidity and in two-dimensional (pseudorapidity and azimuth angle) space. An intermittent, power-law growth of the moments with decreasing bin size is found, with two-dimensional analysis revealing a much stronger effect than for one-dimensional for nucleus-nucleus data. The intermittent patterns are more evident for proton-nucleus than for nucleus-nucleus collisions, with the heaviest nucleus, S32, showing the weakest effect.

1 data table

Table 1

SEMICENTRAL EVENTS.

Approach to Criticality in the Fragmentation of Xenon by 1-{GeV} - 19-{GeV} Protons

Porile, N.T. ; Bujak, A.J. ; Carmony, D.D. ; et al.

Phys.Rev.C 39 (1989) 1914-1928, 1989.

Inspire Record 285057 DOI 10.17182/hepdata.26221

Differential cross sections for the emission of intermediate-mass fragments (3≤Zf≤14) at 48.5° and 131.5° in the interaction of xenon with 1–19 GeV protons have been measured. The excitation functions rise sharply with energy up to ∼10 GeV and then level off. The energy spectra were fitted with an expression based on the phase transition droplet model. Excellent fits with reasonable parameters were obtained for Ep≥9 GeV. Below 6 GeV, the fits show an increasing contribution with decreasing energy from another mechanism, believed to be binary breakup. A droplet model fit to the cross sections ascribed to the multifragmentation component is able to reproduce the variation of the yields with both fragment mass and proton energy. The results are interpreted in terms of the phase diagram of nuclear matter.

24 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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MULTIPLICITY CHARACTERISTICS OF HEAVY ION INTERACTIONS AT 4.5-GEV/C PER NUCLEON

Ghosh, D. ; Mukhopadhyay, A. ; Ghosh, A. ; et al.

Nucl.Phys.A 499 (1989) 850-860, 1989.

Inspire Record 286251 DOI 10.17182/hepdata.36946

This paper presents exhaustive, new data on the shower and compound multiplicity charactersties of 24 Mg-emulsion and 12 C-emulsion interactions at incident momentum of 4.5 GeV/ c per nucleon. A comparative study is made (whenever possible) with p-emulsion interaction data at the same incident momentum per nucleon. The linear dependences of different multplicities on shower and compound multiplicity, e.g., 〈 n i 〉 = a ij + k ij n j -( i ≠ j ), are also shown in this paper.

9 data tables

Table 1

NUCLEUS IS EMULSION NIKFI-BR2.

Table 2

NUCLEUS IS EMULSION NIKFI-BR2.

Table 3

NUCLEUS IS EMULSION NIKFI-BR2.

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PROPERTIES OF PROJECTILE FRAGMENTS FROM C-12 EMULSION INTERACTIONS AT 4.5.A/GEV/C

Ahmad, M.S. ; Khan, M.Q.R. ; Hasan, R. ;

Nucl.Phys.A 499 (1989) 821-836, 1989.

Inspire Record 286250 DOI 10.17182/hepdata.36940

2550 interactions of 12 C in emulsion at 4.5 A GeV / c have been used to study the properties of projectile fragments. The multiplicity and projected angular distributions of projectile fragments in different target groups have been studied. The production cross section of the reaction in which projectile 12 C breaks up into two Z = 3 fragments is found to be 6.6 × 10 −3 of the total inelastic cross section. The projected angular distributions of fragments exhibit features of limiting fragmentation. Statistically significant azimuthal correlations among fragments in the azimuthal plane indicates that the fragmenting nucleus gets a transverse momentum during the collision.

13 data tables

Table 1

No description provided.

Table 2

NUCLEUS IS CNO.

Table 3

NUCLEUS IS AGBR.