Plastic scintillation detectors for precision time-of-flight measurements of relativistic heavy ions

Abstract

Plastic scintillation detectors for Time-of-Flight (TOF) measurements are almost essential for event-by-event identification of relativistic rare isotopes. In this work, a pair of plastic scintillation detectors of 50 $\times$ 50 $\times$ 3${}^t$ mm${}^3$ and 80 $\times$ 100 $\times$ 3${}^t$ mm${}^3$ have been set up at the external target facility (ETF), Institute of Modern Physics. Their time, energy and position responses are measured with ${}^{18}$O primary beam at 400 MeV/nucleon. After the off-line walk-effect and position corrections, the time resolution of the two detectors are determined to be 27 ps ($\sigma$) and 36 ps ($\sigma$), respectively. Both detectors have nearly the same energy resolution of 3$\%$ ($\sigma$) and position resolution of 2 mm ($\sigma$). The detectors have been used successfully in nuclear reaction cross section measurements, and will be be employed for upgrading RIBLL2 beam line at IMP as well as for the high energy branch at HIAF.

arXiv comment6 pages, 11 figures

References in corpus (5)

• Discovery and Cross-Section Measurement of Neutron-Rich Isotopes in the Element Range from Neodymium to Platinum at the FRS
• New charge radius relations for atomic nuclei
• Toward precision mass measurements of neutron-rich nuclei relevant to $r$-process nucleosynthesis
• Development of a fast plastic scintillation detector with time resolution of less than 10 ps
• Time and Position Resolution of the Scintillator Strips for a Muon System at Future Colliders

Cited by in corpus (7)

• Towards the full realization of the RIBLL2 beam line at the HIRFL-CSR complex
• New measurement of the elemental fragmentation cross sections of 218 MeV/nucleon 28 Si on a carbon target
• Charge-changing cross section measurements of 300 MeV/nucleon ${}^{28}$Si on carbon and data analysis
• Improvement of charge resolution for radioactive heavy ions at relativistic energies using a hybrid detector system
• Single-proton removal reaction in the IQMD+GEMINI model benchmarked by elemental fragmentation cross sections of ${}^{29-33}\mathrm{Si}$ on carbon at $\sim$230~MeV/nucleon
• Role of nuclear and electromagnetic fragmentation in the charge-changing reactions of 18O on carbon and lead targets at around 370 MeV/nucleon
• Characterization of the performances of plastic commercial scintillators in cryogenic environments