Time-of-flight energy compensation to improve energy resolution in low-energy radioactive beam experiments at the TwinSol facility

F. D. Becchetti; Hao Jiang; M. Ojaruega; R. O. Torres-Isea; A. N. Villano; J. J. Kolata; A. Roberts

doi:10.1016/j.nima.2010.08.042

Time-of-flight energy compensation to improve energy resolution in low-energy radioactive beam experiments at the TwinSol facility

F. D. Becchetti, Hao Jiang, M. Ojaruega, R. O. Torres-Isea, A. N. Villano, J. J. Kolata, A. Roberts

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Improved time-of-flight (ToF) capability has been added to the University of Michigan (UM)University of Notre Dame (UND) TwinSol low-energy dual 6T solenoid-based radioactive nuclear-beam (RNB) facility at the UND FN tandem Van de Graaff accelerator. An extended low-background beam line has been combined with a newly-constructed ca.1 meter diameter ISO-250 based scattering chamber capable of sub-ns ToF of RNBs. These together with the intrinsic, low ToF spread in the TwinSol ion-optical system yields improved ToF information for low-energy RNB nuclear reaction studies. Using either the intrinsic accelerator bunched and pulsed-selected beams with RF timing, or with the addition of an MCPfoil timing system (or similar) detector at the dual-solenoid cross-over region allows for reduction of the energy spread inherent in these low-energy RNB reactions. As an example, using the ToF information reduces the FWHM energy spread in a high-intensity 28 MeV ⁸Li beam from about 1 MeV to <ca. 600 keV or more without excessive collimation (which reduces the beam). This has been utilized in a recent experiment measuring the Coulomb excitation of a short-lived ⁸Li RNB on gold targets. The use of ToF permitted a much more efficient measurement of this reaction as certain background measurements were no longer needed and the full ⁸Li beam intensity could be utilized. A number of other improvements are planned to further improve the ToF resolution and count-rate limits of the various ToF systems and we hope to utilize these in the future.

Original language	English (US)
Pages (from-to)	532-536
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	652
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2010.08.042
State	Published - Oct 1 2011

Bibliographical note

Funding Information:
We thank the UND operating staff and in particular acknowledge the assistance provided by the late Dr. L. Lamm. This work was supported by the U.S. National Science Foundation under contracts PHY-0652591 and PHY-0758100 .

Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.

Keywords

Coulomb excitation
Exotic beams
Ion-beam time of flight
Radioactive beams

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Becchetti, F. D., Jiang, H., Ojaruega, M., Torres-Isea, R. O., Villano, A. N., Kolata, J. J., & Roberts, A. (2011). Time-of-flight energy compensation to improve energy resolution in low-energy radioactive beam experiments at the TwinSol facility. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 652(1), 532-536. https://doi.org/10.1016/j.nima.2010.08.042

Time-of-flight energy compensation to improve energy resolution in low-energy radioactive beam experiments at the TwinSol facility. / Becchetti, F. D.; Jiang, Hao; Ojaruega, M. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 652, No. 1, 01.10.2011, p. 532-536.

Research output: Contribution to journal › Article › peer-review

Becchetti, FD, Jiang, H, Ojaruega, M, Torres-Isea, RO, Villano, AN, Kolata, JJ & Roberts, A 2011, 'Time-of-flight energy compensation to improve energy resolution in low-energy radioactive beam experiments at the TwinSol facility', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 652, no. 1, pp. 532-536. https://doi.org/10.1016/j.nima.2010.08.042

Becchetti FD, Jiang H, Ojaruega M, Torres-Isea RO, Villano AN, Kolata JJ et al. Time-of-flight energy compensation to improve energy resolution in low-energy radioactive beam experiments at the TwinSol facility. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2011 Oct 1;652(1):532-536. doi: 10.1016/j.nima.2010.08.042

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AU - Villano, A. N.

AU - Kolata, J. J.

AU - Roberts, A.

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Time-of-flight energy compensation to improve energy resolution in low-energy radioactive beam experiments at the TwinSol facility

Abstract

Bibliographical note

Keywords

UN SDGs

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