https://doi.org/10.1140/epja/i2019-12854-7
Regular Article - Experimental Physics
Excitation and 
-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances
1
Research Center for Nuclear Physics, Osaka University, 567-0047, Ibaraki, Osaka, Japan
2
Department of Physics, Tohoku University, Aoba, 980-8587, Sendai, Miyagi, Japan
3
Rare Isotope Science Project, Institute for Basic Science, 70, Yuseong-daero, 1689-gil, Yuseong-gu, Daejeon, Korea
4
Center for Nuclear Study, University of Tokyo, RIKEN Campus, 351-0198, Wako, Saitama, Japan
5
Physics Division, Argonne National Laboratory, 60439, Argonne, IL, USA
6
Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, D-64289, Darmstadt, Germany
7
National Superconducting Cyclotron Laboratory, Michigan State University, 48824, East Lansing, MI, USA
* e-mail: kobayash@rcnp.osaka-u.ac.jp
Received:
24
April
2019
Accepted:
9
August
2019
Published online:
2
December
2019
Physical studies of electric dipole excitations in atomic nuclei e.g. the structure of pygmy dipole resonances and isovector giant dipole resonances are attracting much attention recently. In this article, we describe a technical development in the coincidence measurement of the excitation processes with the Grand Raiden high-resolution magnetic spectrometer and the -decay processes by the CAGRA and SC LLA efficient -detector arrays at the Research Center for Nuclear Physics at Osaka University. Specifically, we describe how we developed a new beamline (GRAF), for detection at the target position by placing the spectrometer at an angle of 
and by transporting the primary beam to a well-shielded beam dump. Experimental conditions and representative data are shown for each of the two -detector arrays.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
