JANUS — A setup for low-energy Coulomb excitation at ReA3

Journal Article · 21 December 2017 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI: https://doi.org/10.1016/j.nima.2017.12.057 · OSTI ID:1416318

Lunderberg, E. ^[1]; Belarge, J. ^[2]; Bender, P. C. ^[2]; Bucher, B. ^[3]; Cline, D. ^[4]; Elman, B. ^[1]; Gade, A. ^[1]; Liddick, S. N. ^[5]; Longfellow, B. ^[1]; Prokop, C. ^[5]; Weisshaar, D. ^[2]; Wu, C. Y. ^[3]

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1. Michigan State University, East Lansing, MI (United States). National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy
2. Michigan State University, East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
4. Univ. of Rochester, NY (United States). Department of Physics
5. Michigan State University, East Lansing, MI (United States). National Superconducting Cyclotron Laboratory and Department of Chemistry

We report that a new experimental setup for low-energy Coulomb excitation experiments was constructed in a collaboration between the National Superconducting Cyclotron Laboratory (NSCL), Lawrence Livermore National Laboratory (LLNL), and the University of Rochester and was commissioned at the general purpose beam line of NSCL's ReA3 reaccelerator facility. The so-called JANUS setup combines γ-ray detection with the Segmented Ge Array (SeGA) and scattered particle detection using a pair of segmented double-sided Si detectors (Bambino 2). The low-energy Coulomb excitation program that JANUS enables will complement intermediate-energy Coulomb excitation studies that have long been performed at NSCL by providing access to observables that quantify collectivity beyond the first excited state, including the sign and magnitude of excited-state quadrupole moments. Here, in this work, the setup and its performance will be described based on the commissioning run that used stable ⁷⁸Kr impinging onto a 1.09 mg/cm^{2 208}Pb target at a beam energy of 3.9 MeV/u.

• Research Organization: Michigan State University, East Lansing, MI (United States). National Superconducting Cyclotron Laboratory; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Michigan State Univ., East Lansing, MI (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
• Grant/Contract Number: NA0003180; FG02-08ER41556; AC52-07NA27344; NA0002132; PHY-1565546; PHY-0969079
• OSTI ID: 1416318
• Alternate ID(s): OSTI ID: 1416506; OSTI ID: 1430732; OSTI ID: 1548991
• Report Number(s): LLNL-JRNL-739594; PII: S0168900217314638; TRN: US1800920
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 885, Issue C; ISSN 0168-9002
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English