Abstract
The projectile-fragment separator FRS, recently installed at the heavy-ion synchrotron SIS18 at GSI, was used to measure the formation cross sections and longitudinal-momentum distributions of fragments produced by removing one, two or three protons from 0.8 GeV x A {sup 136}Xe and 1 GeV x A {sup 197}Au projectiles impinging on targets of beryllium and aluminium, respectively. These data give direct information on the high-energy nuclear collision with only little contribution from evaporation processes. The measured cross sections decrease by more than one order of magnitude per proton removed. They are well reproduced by the predictions of a statistical abrasion model and an intranuclear-cascade calculation. The momentum distributions are found to be much broader than predicted by empirical systematics. They are, however, in agreement with the momentum distribution of the abraded protons as calculated with the uniform-Fermi-gas model, if Fermi momenta as measured by quasi-elastic electron scattering are used. (orig.).
Schmidt, K H;
Suemmerer, K;
Geissel, H;
Muenzenberg, G;
Nickel, F;
Pfuetzner, M;
Weber, M;
[1]
Voss, B;
Brohm, T;
Clerc, H G;
Fauerbach, M;
Gaimard, J J;
Grewe, A;
Hanelt, E;
Steiner, M;
Weckenmann, J;
Ziegler, C;
[2]
Magel, A
[3]
- Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)
- Technische Hochschule Darmstadt (Germany). Inst. fuer Kernphysik
- Giessen Univ. (Germany). 2. Physikalisches Inst.
Citation Formats
Schmidt, K H, Suemmerer, K, Geissel, H, Muenzenberg, G, Nickel, F, Pfuetzner, M, Weber, M, Voss, B, Brohm, T, Clerc, H G, Fauerbach, M, Gaimard, J J, Grewe, A, Hanelt, E, Steiner, M, Weckenmann, J, Ziegler, C, and Magel, A.
Proton removal in peripheral nuclear collisions at relativistic energies.
Germany: N. p.,
1991.
Web.
Schmidt, K H, Suemmerer, K, Geissel, H, Muenzenberg, G, Nickel, F, Pfuetzner, M, Weber, M, Voss, B, Brohm, T, Clerc, H G, Fauerbach, M, Gaimard, J J, Grewe, A, Hanelt, E, Steiner, M, Weckenmann, J, Ziegler, C, & Magel, A.
Proton removal in peripheral nuclear collisions at relativistic energies.
Germany.
Schmidt, K H, Suemmerer, K, Geissel, H, Muenzenberg, G, Nickel, F, Pfuetzner, M, Weber, M, Voss, B, Brohm, T, Clerc, H G, Fauerbach, M, Gaimard, J J, Grewe, A, Hanelt, E, Steiner, M, Weckenmann, J, Ziegler, C, and Magel, A.
1991.
"Proton removal in peripheral nuclear collisions at relativistic energies."
Germany.
@misc{etde_10129243,
title = {Proton removal in peripheral nuclear collisions at relativistic energies}
author = {Schmidt, K H, Suemmerer, K, Geissel, H, Muenzenberg, G, Nickel, F, Pfuetzner, M, Weber, M, Voss, B, Brohm, T, Clerc, H G, Fauerbach, M, Gaimard, J J, Grewe, A, Hanelt, E, Steiner, M, Weckenmann, J, Ziegler, C, and Magel, A}
abstractNote = {The projectile-fragment separator FRS, recently installed at the heavy-ion synchrotron SIS18 at GSI, was used to measure the formation cross sections and longitudinal-momentum distributions of fragments produced by removing one, two or three protons from 0.8 GeV x A {sup 136}Xe and 1 GeV x A {sup 197}Au projectiles impinging on targets of beryllium and aluminium, respectively. These data give direct information on the high-energy nuclear collision with only little contribution from evaporation processes. The measured cross sections decrease by more than one order of magnitude per proton removed. They are well reproduced by the predictions of a statistical abrasion model and an intranuclear-cascade calculation. The momentum distributions are found to be much broader than predicted by empirical systematics. They are, however, in agreement with the momentum distribution of the abraded protons as calculated with the uniform-Fermi-gas model, if Fermi momenta as measured by quasi-elastic electron scattering are used. (orig.).}
place = {Germany}
year = {1991}
month = {Dec}
}
title = {Proton removal in peripheral nuclear collisions at relativistic energies}
author = {Schmidt, K H, Suemmerer, K, Geissel, H, Muenzenberg, G, Nickel, F, Pfuetzner, M, Weber, M, Voss, B, Brohm, T, Clerc, H G, Fauerbach, M, Gaimard, J J, Grewe, A, Hanelt, E, Steiner, M, Weckenmann, J, Ziegler, C, and Magel, A}
abstractNote = {The projectile-fragment separator FRS, recently installed at the heavy-ion synchrotron SIS18 at GSI, was used to measure the formation cross sections and longitudinal-momentum distributions of fragments produced by removing one, two or three protons from 0.8 GeV x A {sup 136}Xe and 1 GeV x A {sup 197}Au projectiles impinging on targets of beryllium and aluminium, respectively. These data give direct information on the high-energy nuclear collision with only little contribution from evaporation processes. The measured cross sections decrease by more than one order of magnitude per proton removed. They are well reproduced by the predictions of a statistical abrasion model and an intranuclear-cascade calculation. The momentum distributions are found to be much broader than predicted by empirical systematics. They are, however, in agreement with the momentum distribution of the abraded protons as calculated with the uniform-Fermi-gas model, if Fermi momenta as measured by quasi-elastic electron scattering are used. (orig.).}
place = {Germany}
year = {1991}
month = {Dec}
}