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Measurement of the Polarization of the Proton Proton Elastic Reaction at Small Scattering Angles Between 940-{MeV} and 2440-{MeV}

Dalla Torre-Colautti, S. ; Birsa, R. ; Bradamante, F. ; et al.

Nucl.Phys.A 505 (1989) 561-582, 1989.

Inspire Record 288841 DOI 10.17182/hepdata.36886

We have measured the asymmetry of elastic pp scattering at small scattering angles (30–100 mrad) in the Coulomb-nuclear interference region, using the polarized proton beam of Saturne II, a segmented scintillator active target, and two telescopes of multiwire proportional chambers. Results are given at four energies — 940, 1000, 1320 and 2440 MeV-and are compared with phase-shift calculations.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Properties of Binary Fission and Multifragmentation in the Transition Regime

Klotz-Engmann, G. ; Oschler, H. ; Stroth, J. ; et al.

Nucl.Phys.A 499 (1989) 392-412, 1989.

Inspire Record 285129 DOI 10.17182/hepdata.36939

Correlations between target fragments were measured in α- and 14 N-induced reactions at 70, 250 and 800 MeV/u incident energies. The reaction mechanism is characterized by the linear momentum transfer and the excitation energy which were deduced from the kinematics and the mass distribution of the fission fragments. By selecting targets lighter than Th (Au and Ho) the yield from peripheral collisions is reduced by the increase in the fission barrier thus allowing events with the highest linear momentum transfer and excitation energy to be favoured. The results show that up to an incident energy of 800 MeV/u hot nuclei are formed which decay via normal binary fission. The linear momentum transfer is essentially constant over the covered energy range, but the excitation energy increases until the total incident energy is greater than 3 GeV. At this energy, independent of the projectile mass the fission probability of the heavy nuclei drops below 50%, while the emission of intermediate-mass fragments increases. The relative velocities between two intermediate-mass fragments exceed strongly the values of binary fission. Monte Carlo calculations show that the relative velocities between these fragments exclude a sequential emission from the recoil nucleus and support a simultaneous breakup mechanism.

5 data tables

Table 1

SIG IS FISSION CROSS-SECTION CALCULATED WITH THE SOFT-SPHERE MODEL OF REF. PHYS.REV.C11 (1975) 1203.

Table 2

SIG IS FISSION CROSS-SECTION CALCULATED WITH THE SOFT-SPHERE MODEL OF REF. PHYS.REV.C11 (1975) 1203.

Table 3

SIG IS FISSION CROSS-SECTION CALCULATED WITH THE SOFT-SPHERE MODEL OF REF. PHYS.REV.C11 (1975) 1203.

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EXPERIMENTAL DATA ON MULTIPLICITIES IN CENTRAL COLLISIONS C-12 + C-12, F-19 + MG-24, MG-24 + MG-24 AT 3.7-GEV/NUCLEON. (IN RUSSIAN)

Anikina, M.Kh. ; Abdurakhimov, A.U. ; Avramenko, S.A. ; et al.

DUBNA JINR - 1(34)-89 (89,REC.APR.) 12-19, 1989.

Inspire Record 282227 DOI 10.17182/hepdata.38295

None

9 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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RESONANCE PATTERN OF LOW MASS MUON PAIRS PRODUCED IN 38-GEV/C PI- C INTERACTIONS.

The RISK collaboration Bannikov, A.V. ; Bohm, J. ; Choe, Song Hek ; et al.

DUBNA JINR - 89-486 (89,REC.OCT.) 14p, 1989.

Inspire Record 286947 DOI 10.17182/hepdata.39438

None

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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.