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Velocity determination of neutron-rich projectile fragments with a ring-imaging Cherenkov detector; Geschwindigkeitsbestimmung neutronenreicher Projektilfragmente mit einem Ring-abbildenden Cherenkovdetektor

Abstract

For the velocity determination of relativistic heavy ions (A>100) in the energy range 300A.MeV {<=} E{sub kin} {<=} 2A.GeV a highly resolving, compact ring-imaging Cherenkov counter with large dynamical measurement range was developed. The Cherenkov light cone emitted in the flight of a relativistic heavy ion by a liquid layer (C{sub 6}F{sub 14}) is focused on the entrance window of a one-dimensional position-resolving VUV-sensitive photon detector. This gas detector is operated at atmospheric pressure with a mixture of 90% methane and 10% isobutane with 0.04% TMAE as photosensitive admixture. For 725A.MeV {sup 129}Xe ions a velocity resolution {Delta}{beta}/{beta}=1.8.10{sup -3} and a nuclear charge-number resolution {Delta}Z/Z=5.1.10{sup -2} was reached. The over the photon energy range 5.4 eV {<=} E{sub {gamma}} {<=} 7.2 eV averaged detection efficiency of the detector system was determined to {epsilon}{sub tot}=2.8%>. At the 0deg magnet spectrometer Fragmentseparator of the GSI Darmstadt the RICH detector was for the first time applied for the identification of nuclear charge number and mass of heavy relativistic projectile fragments. In the experiment the production cross sections of very neutron-rich nuclei by fragmentation of {sup 136}Xe projectiles in the reaction 76A.MeV {sup 136}Xe on {sup 27}Al were determined. From the measured production erates  More>>
Authors:
Publication Date:
Nov 01, 1992
Product Type:
Thesis/Dissertation
Report Number:
GSI-92-25
Reference Number:
SCA: 440103; 663450; 663530; PA: DEN-93:001881; SN: 93000946764
Resource Relation:
Other Information: TH: Diss. (Dr.rer.nat.); PBD: Nov 1992
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALUMINIUM 27 TARGET; XENON 136 REACTIONS; INCLUSIVE INTERACTIONS; CHERENKOV COUNTERS; ION DETECTION; PARTICLE IDENTIFICATION; RELATIVISTIC RANGE; EXPERIMENTAL DATA; INTEGRAL CROSS SECTIONS; GEV RANGE 10-100; NEUTRON-RICH ISOTOPES; KNOCK-OUT REACTIONS; NUCLEAR FRAGMENTS; RESOLUTION; MASS SPECTRA; CHARGE DISTRIBUTION; RHODIUM 116; PALLADIUM 119; SILVER 122; CADMIUM 124; INDIUM 127; TIN 129; TIN 130; TIN 132; ANTIMONY 132; ANTIMONY 133; TELLURIUM 134; TELLURIUM 135; IODINE 136; 440103; 663450; 663530; NUCLEAR SPECTROSCOPIC INSTRUMENTATION; HEAVY-ION-INDUCED REACTIONS AND SCATTERING; A = 20-38
OSTI ID:
10128498
Research Organizations:
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany); Technische Univ. Muenchen, Garching (Germany). Fakultaet fuer Physik
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Other: ON: DE93768894; TRN: DE9301881
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
92 p.
Announcement Date:
Jul 04, 2005

Citation Formats

Zeitelhack, K. Velocity determination of neutron-rich projectile fragments with a ring-imaging Cherenkov detector; Geschwindigkeitsbestimmung neutronenreicher Projektilfragmente mit einem Ring-abbildenden Cherenkovdetektor. Germany: N. p., 1992. Web.
Zeitelhack, K. Velocity determination of neutron-rich projectile fragments with a ring-imaging Cherenkov detector; Geschwindigkeitsbestimmung neutronenreicher Projektilfragmente mit einem Ring-abbildenden Cherenkovdetektor. Germany.
Zeitelhack, K. 1992. "Velocity determination of neutron-rich projectile fragments with a ring-imaging Cherenkov detector; Geschwindigkeitsbestimmung neutronenreicher Projektilfragmente mit einem Ring-abbildenden Cherenkovdetektor." Germany.
@misc{etde_10128498,
title = {Velocity determination of neutron-rich projectile fragments with a ring-imaging Cherenkov detector; Geschwindigkeitsbestimmung neutronenreicher Projektilfragmente mit einem Ring-abbildenden Cherenkovdetektor}
author = {Zeitelhack, K}
abstractNote = {For the velocity determination of relativistic heavy ions (A>100) in the energy range 300A.MeV {<=} E{sub kin} {<=} 2A.GeV a highly resolving, compact ring-imaging Cherenkov counter with large dynamical measurement range was developed. The Cherenkov light cone emitted in the flight of a relativistic heavy ion by a liquid layer (C{sub 6}F{sub 14}) is focused on the entrance window of a one-dimensional position-resolving VUV-sensitive photon detector. This gas detector is operated at atmospheric pressure with a mixture of 90% methane and 10% isobutane with 0.04% TMAE as photosensitive admixture. For 725A.MeV {sup 129}Xe ions a velocity resolution {Delta}{beta}/{beta}=1.8.10{sup -3} and a nuclear charge-number resolution {Delta}Z/Z=5.1.10{sup -2} was reached. The over the photon energy range 5.4 eV {<=} E{sub {gamma}} {<=} 7.2 eV averaged detection efficiency of the detector system was determined to {epsilon}{sub tot}=2.8%>. At the 0deg magnet spectrometer Fragmentseparator of the GSI Darmstadt the RICH detector was for the first time applied for the identification of nuclear charge number and mass of heavy relativistic projectile fragments. In the experiment the production cross sections of very neutron-rich nuclei by fragmentation of {sup 136}Xe projectiles in the reaction 76A.MeV {sup 136}Xe on {sup 27}Al were determined. From the measured production erates for the production of the double-magic nucleus {sup 132}Zn in this reaction a cross section of {sigma}=(0.4{+-}{sub 0.3}{sup 0.6}) {mu}barn can be extrapolated. (orig./HSI). [Deutsch] Zur Geschwindigkeitsbestimmung relativistischer Schwerionen (A>100) im Energiebereich 300 A.MeV {<=} E{sub kin} {<=} 2A.GeV wurde ein hochaufloesender, kompakter Ring- abbildender Cherenkovdetektor mit grossem dynamischen Messbereich entwickelt. Der beim Durchflug eines relativistischen Schwerions von einer Fluessigkeitsschicht (C{sub 6}F{sub 14}) emittierte Cherenkovlichtkegel wird auf das Eintrittsfenster eines eindimensional ortsaufloesenden VUV-sensitiven Photonendetektors fokussiert. Dieser Gasdetektor wird bei Atmosphaerendruck mit einer Mischung aus 90% Methan und 10% Isobutan mit 0.04% TMAE als photosensitiver Beimengung betrieben. Fuer 725 A.MeV {sup 129}Xe-Ionen wurde eine Geschwindigkeitsaufloesung {Delta}{beta}/{beta}=1.8.10{sup -3} und eine Kernladungszahlaufloesung {Delta}Z/Z=5.1.10{sup -2} erreicht. Die ueber den Photonenergiebereich 5.4 eV {<=} E{sub {gamma}} {<=} 7.2 eV gemittelte Nachweiseffizienz des Detektorsystems fuer Cherenkovlicht wurde zu {epsilon}{sub tot}=2.8% bestimmt. Am 0deg-Magnetospektrometer Fragmentseparator der GSI Darmstadt wurde der RICH-Detektor erstmals zur Identifikation von Kernladungszahl und Masse schwerer relativistischer Projektfragmente eingesetzt. In diesem Experiment wurden die Erzeugungsquerschnitte sehr neutronenreicher Kerne durch Fragmentation von {sup 136}Xe-Projektilen in der Reaktion 760 A.MeV {sup 136}Xe auf {sup 27}Al bestimmt. Aus den gemessenen Produktionsraten laesst sich fuer die Erzeugung des doppelt magischen Kerns {sup 132}Sn in dieser Reaktion ein Wirkungsquerschnitt {sigma}=(0.4{+-}{sub 0.3}{sup 0.6}){mu}barn extrapolieren. (orig./HSI).}
place = {Germany}
year = {1992}
month = {Nov}
}