A Measurement of Cross-sections for $^{16}$O Al and $^{16}$O Pb Interactions at 60-{GeV}/$c$ and 200-{GeV}/$c$ Per Nucleon

The NA36 collaboration Barnes, P.D. ; Blaes, R. ; Braun, H. ; et al.
Phys.Lett.B 206 (1988) 146-150, 1988.
Inspire Record 252004 DOI 10.17182/hepdata.6494

Cross sections are measured for 16 O collisions with A1 and Pb. Dependences on beam momentum and atomic number are compared with data obtained at much lower beam momenta.

4 data tables

MODEL DEPENDENT ESTIMATION.

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Fragmentation studies of 158-A-GeV Pb ions using CR39 nuclear track detectors.

Dekhissi, H. ; Giacomelli, G. ; Giorgini, M. ; et al.
Nucl.Phys.A 662 (2000) 207-216, 2000.
Inspire Record 486410 DOI 10.17182/hepdata.43834

Six stacks of CR39 [(C 12 H 18 O 7 ) n , a Registered Trade Mark of PPG Industries, Inc.] nuclear track detectors with different targets were exposed to a lead ion beam of 158 A GeV at the CERN-SPS, at normal incidence, in order to study the fragmentation properties of ultra-relativistic lead nuclei. Measurements of the total, break-up and pick-up charge-changing cross sections of 158 A GeV Pb ions have been made for the first time.

5 data tables

Total charge-changing cross section.

Total charge-changing cross section.

Total charge-changing cross section.

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Production of helium fragments in Au-197 emulsion collisions at 10.6-A/GeV

Singh, G. ; Jain, P.L. ;
Z.Phys.A 348 (1994) 99-104, 1994.
Inspire Record 380467 DOI 10.17182/hepdata.16555

We present a systematic analysis on the helium projectile fragments produced from 10.6 A GeV197Auemulsion interactions in an experiment conducted at the Brookhaven AGS. Total charge changing and partial production cross-sections are measured experimentally on the basis of helium multiplicity. The multiplicity distribution of helium fragments which are produced collectively obey a KNO scaling. The transverse momentum distribution of these particles indicates that they are produced from two different independent sources.

3 data tables

THE TOTAL CHARGE CHANGING CROSS-SECTION WAS DETERMINED FROM THE INTERACTION MEAN FREE PATH OF NUCLEAR INTERACTIONS IN CONJUNCTION WITH THE DENSITY OF ATOMS IN EMULSION.

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A SAMPLE OF SEMICENTRAL EVENTS SUCH THAT THE PROJECTILE FRAGMENTS OF CHARGES 2<=Z<=17 WERE SURVIVED IN AN INTERACTION.


Search for strange quark matter produced in relativistic heavy ion collisions

The E864 collaboration Armstrong, T.A. ; Barish, K.N. ; Batsouli, S. ; et al.
Phys.Rev.C 63 (2001) 054903, 2001.
Inspire Record 535783 DOI 10.17182/hepdata.31785

We present the final results from Experiment 864 of a search for charged and neutral strange quark matter produced in interactions of 11.5 GeV/c per nucleon Au beams with Pt or Pb targets. Searches were made for strange quark matter with A&gt;4. Approximately 30 billion 10% most central collisions were sampled and no strangelet states with A&lt;100 were observed. We find 90% confidence level upper limits of approximately 10^{-8} per central collision for both charged and neutral strangelets. These limits are for strangelets with proper lifetimes greater than 50 ns. Also limits for H^{0}-d and pineut production are given. The above limits are compared with the predictions of various models. The yields of light nuclei from coalescence are measured and a penalty factor for the addition of one nucleon to the coalescing nucleus is determined. This is useful in gauging the significance of our upper limits and also in planning future searches for strange quark matter.

9 data tables

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Electromagnetic Dissociation of 200-{GeV}/$N ^{16}$O and $^{32}$S Ions in Nuclear Emulsions

Baroni, G. ; Bisi, V. ; Breslin, A.C. ; et al.
Nucl.Phys.A 516 (1990) 673-714, 1990.
Inspire Record 294682 DOI 10.17182/hepdata.36830

This work represents the results of an experimental investigation of the electromagnetic dissociation of 200 GeV/nucleon 16 O and 32 S ions in nuclear emulsions. Exclusive channels involving charged fragments have been studied as a function of the energy released, and, assuming a Weizsäcker-Williams spectrum of virtual photons, there is a good agreement with results for the (γ, p) processes obtained with real photons. However, the rates found for other processes are larger, in particular for the (γ, α) on both nuclei. The values of the total integrated absorption cross sections are generally larger than those obtained from real photon experiments but the extent of the discrepancy depends strongly upon which photon results are used in the comparison.

6 data tables

ELECTROMAGNETIC DISSOCIATION IN NUCLEAR EMULSION.

ELECTROMAGNETIC DISSOCIATION IN NUCLEAR EMULSION.

NUCLEUS IS THE EMULSION.

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Characteristics of helium fragments produced in Si-28 emulsion interactions at 14.5-A-GeV

Singh, G. ; Ismail, A.Z.M. ; Jain, P.L. ;
Phys.Rev.C 43 (1991) 2417-2421, 1991.
Inspire Record 323101 DOI 10.17182/hepdata.26112

We report the measurements on partial production cross sections of the multiple helium fragments emitted in the interactions of Si28 ions at 14.5A GeV in nuclear emulsion. Interaction mean free paths of the helium fragments have been investigated on the basis of helium multiplicity and size of the target nucleus as a function of the distance from their production points. Multiplicity scaling in the produced helium fragments is also observed.

5 data tables

FIRST REACTION RESPECTS CENTRAL, SECOND - PERIPHERAL INELASTIC INTERACTION.

FIRST REACTION RESPECTS CENTRAL, SECOND - PERIPHERAL INTERACTION. THIRD REACTION RESPECT 0HE PRODUCTION.

MULT(FRAGT) IS AVERAGED NUMBER OF HEAVY TRACKS FROM THE TARGET NUCLEUS, MULT(SHOWER) IS AVERAGED NUMBER OF MINIMUM IONIZING SHOWER TRACKS WHICH INCLUDED THE NUMBER OF SINGLY CHARGED PROJECTILE PROTON TRACKS.

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Measurement of the transverse energy flow in nucleus-nucleus collisions at 200-GeV per nucleon

The HELIOS collaboration Åkesson, T. ; Almehed, S. ; Angelis, A.L.S. ; et al.
Nucl.Phys.B 353 (1991) 1-19, 1991.
Inspire Record 299861 DOI 10.17182/hepdata.33034

The transverse energy distributions have been measured for interactions of 32 S nuclei with Al, Ag, W, Pt, Pb, and U targets, at an incident energy of 200 GeV per nucleon in the pseudorapidity region −0.1 < ν lab < 5.5. These distributions are compared with those for 16 OW interactions in the same pseudorapidity region and with earlier measurements performed with 16 O and 32 S projectiles in the region −0.1 < ν lab < 2.9. These comparisons provide both a better understanding of the dynamics involved and improved estimates of stopping power and energy density.

7 data tables

No description provided.

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A Measurement of Cross-sections for $^{32}$S Interactions With Al, Fe, Cu, Ag and Pb at 200-{GeV}/$c$ Per Nucleon

The NA36 collaboration Andersen, E. ; Barnes, P.D. ; Blaes, R. ; et al.
Phys.Lett.B 220 (1989) 328-332, 1989.
Inspire Record 277260 DOI 10.17182/hepdata.29840

Cross sections for charge changing and particle production are measured for 32 S collisions with Al, Fe, Cu, Ag and Pb targets at 200 GeV/ c . The measured difference between the two cross sections is discussed. Results are compared with data obtained with an 16 O beam.

2 data tables

Charge changing cross section.

Production cross section.


The Transverse Energy Distributions of $^{32}$S Nucleus Collisions at 200-{GeV} Per Nucleon

The HELIOS collaboration Akesson, T. ; Almehed, S. ; Angelis, A.L.S. ; et al.
Phys.Lett.B 214 (1988) 295-302, 1988.
Inspire Record 265090 DOI 10.17182/hepdata.29873

Transverse-energy distributions have been measured for the collisions of the 32 S nucleus with Al, Ag, W, Pt, Pb, and U target nuclei, at an incident energy of 200 GeV per nucleon. The shapes of these distribution reflect the geometry of the collisions, including the deformation effects. For central collisions, the transverse-energy production in the region −0.1< η lab <2.9 increases approximately as A 0.5 , where A is the atomic mass number of the target. This increase is accompanied by a relative depletion in the forward region η lab > 2.9. These results are compared with those obtained under similar conditions with incident 16 O nuclei. A comparison is also made with the predictions of a Monte Carlo generator based on the dual parton model. Finally, we give estimates of the energy density reached and its dependence on the atomic mass number of the projectile.

6 data tables

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The Transverse Energy Distribution in $^{16}$O - Nucleus Collisions at 60-{GeV} and 200-{GeV} Per Nucleon

The HELIOS collaboration Akesson, T. ; Almehed, S. ; Angelis, A.L.S. ; et al.
Z.Phys.C 38 (1988) 383, 1988.
Inspire Record 250767 DOI 10.17182/hepdata.15648

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6 data tables

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