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.

No description provided.

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Measurements of total reaction cross-sections for some light nuclei at intermediate-energies

Fang, D.Q. ; Shen, W.Q. ; Feng, J. ; et al.
Phys.Rev.C 61 (2000) 064311, 2000.
Inspire Record 527655 DOI 10.17182/hepdata.25562

Measurements of the total reaction cross section for 12−16C, 14−17N, and 16−18O on carbon target at intermediate energies were performed on the Radioactive Ion Beam Line of the Heavy Ion Research Facility in Lanzhou. A larger enhancement of σR for 15C was observed than for its neighbors. Evidence for possible anomalous nuclear structure in 15C was revealed in the analysis of the total reaction cross section in terms of the difference factor d.

1 data table

No description provided.


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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Total reaction and 2n-removal cross-sections of 20-60 A MeV He-4, He-6, He-8, Li-(6-9), Li-11, and Be-10 on Si

Warner, R.E. ; Patty, R.A. ; Voyles, P.M. ; et al.
Phys.Rev.C 54 (1996) 1700-1709, 1996.
Inspire Record 433951 DOI 10.17182/hepdata.25830

Total reaction cross sections, σR, of 20–60A MeV He4,6,8, Li6–9,11, and Be10 were measured by injecting magnetically separated, focused, monoenergetic, identified secondary beams of those projectiles into a Si detector telescope and measuring their energy-deposition spectra. These σR’s, accurate to about 3%, were compared with predictions of optical, strong absorption, and microscopic models. The latter gave the best overall fit to the data, providing long-tailed matter densities were assumed. The best available optical potentials generally overpredicted the data by about 10%. Strong absorption calculations, in which the isospin-dependent term is quite important, were often unsuccessful, especially for projectiles with large neutron excess. Two-neutron removal cross sections were measured for He6 and Li11; the Li11 data were slightly overpredicted by a microscopic model which includes correlation effects for the Li11 valence neutrons. Both 2n and 4n removal from He8 were observed, in about a 2:1 ratio. Subtraction analysis of the data indicates that He4 is a good core within He6 and He8, as is Li9 within Li11. © 1996 The American Physical Society.

9 data tables

Axis error includes +- 3/3 contribution (Statistical uncertainty is negligible).

Axis error includes +- 3/3 contribution (Statistical uncertainty is negligible).

Axis error includes +- 3/3 contribution (Statistical uncertainty is negligible).

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Total and 2n removal cross-sections of the neutron rich isotopes Li-8, Li-9, Li-11

Blank, B. ; Gaimard, J.J. ; Geissel, H. ; et al.
Nucl.Phys.A 555 (1993) 408-434, 1993.
Inspire Record 335318 DOI 10.17182/hepdata.36666

Total interaction cross sections have been measured for 8 Li on C and Pb targets, for 9 Li on C, Al, Cu, Sn and Pb targets, as well as for 11 Li on C, Sn and Pb targets at about 80 MeV/nucleon. In addition, 2n-removal cross sections for 11 Li have been extracted. These measurements are used to determine the nuclear and the electromagnetic part of the cross sections for the different projectile-target combinations. The experimental results are compared to different model calculations. These comparisons allow one to draw conclusions on the matter density distribution of the neutron-rich lithium isotope 11 Li. By comparing our data on the electromagnetic dissociation of 11 Li with all the other data available in the literature, we are able to put constraints on the dipole-strength distribution in 11 Li.

1 data table

Axis error includes +- 0.0/0.0 contribution (?////).


Nuclear and electromagnetic fragmentation of 2.25-TeV Au-197 nuclei

He, Y.D. ; Price, P.B. ;
Z.Phys.A 348 (1994) 105-109, 1994.
Inspire Record 380468 DOI 10.17182/hepdata.16562

We report the first measurement of the total charge-loss cross section σtot=σem+σnuc and partial cross sections (for ΔZ=1, 2, ..., 9) of 11.4 A GeV197Au nuclei in various targets. The large Coulomb barrier for Au reduces the electromagnetic contribution σem in a Pb target to only 18% of σnuc, compared with ∼ 70% for 14.5 A GeV28Si and 120% for 200 A GeV32S. With σem taken to be ∝ZT1.8, σnuc can be fitted with σnuc=α(AP1/3 +AT1/3−b)2, with b=0.83 and α=59 mb, essentially the same as found at energies of 1 to 2 A GeV. Electromagnetic partial cross sections for ΔZ=1 exceed ∼ 40 mb in the Pb, Sn, Cu, and Fe targets and are substantial for larger values ofΔZ in the heavier targets.

2 data tables

TOTAL CHARGE-LOSS CROSS SECTION.

PARTIAL CHARGE-CHANGING CROSS SECTION.


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.

No description provided.

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

No description provided.

No description provided.

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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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Measurements of Interaction Cross-Sections and Nuclear Radii in the Light p Shell Region

Tanihata, I. ; Hamagaki, H. ; Hashimoto, O. ; et al.
Phys.Rev.Lett. 55 (1985) 2676-2679, 1985.
Inspire Record 227714 DOI 10.17182/hepdata.20283

Interaction cross sections (σI) for all known Li isotopes (Li6-Li11) and Be7, Be9, and Be10 on targets Be, C, and Al have been measured at 790 MeV/nucleon. Root mean square radii of these isotopes as well as He isotopes have been deduced from the σI by a Glauber-type calculation. Appreciable differences of radii among isobars (He6-Li6, He8-Li8, and Li9-Be9) have been observed for the first time. The nucleus Li11 showed a remarkably large radius suggesting a large deformation or a long tail in the matter distribution.

1 data table

No description provided.