The scintillation-detector equipment of the GSI projectile—fragment separator

Voss, B.; Brohm, T.; Clerc, H.‐G.; Grewe, A.; Hanelt, E.; Heinz, A.; Jong, M. de; Junghans, A. R.; Morawek, W.; Röhl, C.; Steinhäuser, S.; Ziegler, C.A.; Schmidt, Karl‐Heinz; Behr, K.-H.; Geißel, H.; Münzenberg, G.; Nickel, F.; Scheidenberger, C.; Sümmerer, K.; Magel, A.; Pfützner, M.

doi:10.1016/0168-9002(95)00294-4

Cited by 39 publications

(13 citation statements)

References 25 publications

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“…The nuclear charge of each ion is obtained from the energy loss measured by the ionisation chamber placed at the exit of the FRS. The time-of-flight (ToF) is measured by two plastic scintillators [7], located in the intermediate dispersive and in the final focal plane respectively, separated by 37 m. The magnetic field B is set with an accuracy of 10 −4 . The radius of the trajectory ρ is known from an accurate determination of the horizontal positions in the two scintillation detectors.…”

Section: Methodsmentioning

confidence: 99%

Very heavy fission fragments produced in the spallation reaction 238U+p at

et al. 2006

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Fission fragments from 1 A GeV 238 U ions impinging a hydrogen target are investigated by using the fragment separator FRS for magnetic selection of reaction products including ray-tracing, and E-ToF techniques. On the basis of the kinematics of the fragments, binary fission can be assigned as production process up to very heavy fragments. Fission fragments are separated and identified as far as 184 Re for the first time. Cross sections are measured and found in the range of 500 µb to 5 µb. Isobaric cross sections decrease smoothly with increasing masses. Beyond tungsten, fission fragments are hidden in the more abundant spallation evaporation residues. 283 isotopes of elements gadolinium to rhenium in the mass range 147 to 184 are observed and cross sections measured. All the fragments are formed by fission of excited parent nuclei following emission of a cascade of secondary neutrons.

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Section: Methodsmentioning

confidence: 99%

Very heavy fission fragments produced in the spallation reaction 238U+p at

et al. 2006

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“…In this latter case, only the second part of the FRS was used to identify the proton-and neutron-removal residues. In all measurements, the beam intensity was monitored by using the SEcondary Electron TRAnsmssion Monitor SEETRAM [31] calibrated with a reference plastic scintillator [32]. Three plastic scintillator detectors were placed between the two first dipoles and at the intermediate and final focal planes to measure the time of flight (ToF) of the reaction products with a resolution of around 150 ps full width at half maximum (FWHM).…”

Section: A Detection Setupmentioning

confidence: 99%

Knockout and fragmentation reactions using a broad range of tin isotopes

et al. 2017

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Production cross sections of residual nuclei obtained by knockout and fragmentation reactions of different tin isotopes accelerated at 1A GeV have been measured with the fragment separator (FRS) at GSI, Darmstadt. The new measurements are used to investigate the neutron-excess dependence of the neutron-and proton-knockout cross sections. These cross sections are compared to Glauber model calculations coupled to a nuclear deexcitation code in order to investigate the role of the remnant excitations. This benchmarking shows an overestimation of the cross sections for the removal of deeply bound nucleons. A phenomenological increase in the excitation energy induced in the remnants produced in these cases allows us to reproduce the measured cross sections.

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“…1 we also show the schematic drawing of all the detectors used in this work for the identification of the reaction residues. Two position-sensitive plastic scintillators [33] which are placed at both focal planes provide the magnetic rigidities and the time of flight (ToF) in the second FRS stage. It is worth mentioning that a thinner plastic scintillator has been used in this experiment compared to the one used with higher beam energies in order to reduce the energy loss of the fragments traversing the FRS.…”

Section: Methodsmentioning

confidence: 99%

Isotopic production cross sections of residual nuclei in the spallation reactionXe136(200AMeV)+p
Paradela¹,
Tassan‐Got²,
Benlliure³
et al. 2017
Phys. Rev. C
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The residual nuclei produced in the spallation reaction of 136 Xe nuclei at 200A MeV on protons have been studied by measuring the isotopic distributions for the elements from cadmium (Z = 48) to cesium (Z = 55) by using the fragment separator (FRS) spectrometer at GSI and the inverse kinematics technique. This is one of the few measurements performed at such a low projectile energy, close to the validity limit for intranuclear cascade models such as INCL or ISABEL. The experimental results have been compared to these intranuclear cascade codes coupled to the evaporation code ABLA. Both code combinations reproduce qualitatively the measured isotopic distributions; however, both underestimate the production of residues with mass numbers between 126 and 134. The measured cross sections are of interest for the planning of future radioactive beam or neutron source facilities.

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The scintillation-detector equipment of the GSI projectile—fragment separator

Cited by 39 publications

References 25 publications

Very heavy fission fragments produced in the spallation reaction 238U+p at

Very heavy fission fragments produced in the spallation reaction 238U+p at

Knockout and fragmentation reactions using a broad range of tin isotopes

Isotopic production cross sections of residual nuclei in the spallation reactionXe136(200AMeV)+p
Paradela¹,
Tassan‐Got²,
Benlliure³
et al. 2017
Phys. Rev. C
Self Cite
16
0
16
0
View full text Add to dashboard Cite

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The scintillation-detector equipment of the GSI projectile—fragment separator

Cited by 39 publications

References 25 publications

Very heavy fission fragments produced in the spallation reaction 238U+p at

Very heavy fission fragments produced in the spallation reaction 238U+p at

Knockout and fragmentation reactions using a broad range of tin isotopes

Isotopic production cross sections of residual nuclei in the spallation reactionXe136(200AMeV)+pParadela1, Tassan‐Got2, Benlliure3 et al. 2017Phys. Rev. CSelf Cite160160View full textAdd to dashboardCite

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Isotopic production cross sections of residual nuclei in the spallation reactionXe136(200AMeV)+p
Paradela¹,
Tassan‐Got²,
Benlliure³
et al. 2017
Phys. Rev. C
Self Cite
16
0
16
0
View full text Add to dashboard Cite