Excitation and $\gamma$-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances

Kobayashi, N.; Miki, K.; Hashimoto, T.; Iwamoto, C.; Tamii, A.; Aoi, N.; Carpenter, M. P.; Hatanaka, K.; Isaak, J.; Ideguchi, E.; Morinobu, S.; Nakamura, S.; Noji, S.

doi:10.1140/epja/i2019-12854-7

Title: Excitation and $$\gamma$$-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances

Abstract

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 γ-decay processes by the CAGRA and SCγ LLA efficient γ-detector arrays at the Research Center for Nuclear Physics at Osaka University. Specifically, we describe how we developed a new beamline (GRAF), for γ detection at the target position by placing the spectrometer at an angle of 4.5-19.0° and by transporting the primary beam to a well-shielded beam dump. Experimental conditions and representative data are shown for each of the two γ-detector arrays.

Authors:

Kobayashi, N. ^[1]; Miki, K. ^[2]; Hashimoto, T. ^[3]; Iwamoto, C. ^[4]; Tamii, A. ^[1]; Aoi, N. ^[1]; Carpenter, M. P. ^[5]; Hatanaka, K. ^[1]; Isaak, J. ^[6]; Ideguchi, E. ^[1]; Morinobu, S. ^[1]; Nakamura, S. ^[1]; Noji, S. ^[7]

Osaka Univ. (Japan)
Tohoku Univ., Sendai (Japan). Dept. of Physics
Inst. for Basic Science, Daejeon (Korea)
Univ. of Tokyo (Japan)
Argonne National Lab. (ANL), Argonne, IL (United States)
Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik
Michigan State Univ., East Lansing, MI (United States)

Publication Date:: Sun Dec 01 00:00:00 EST 2019

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1607630

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: European Physical Journal. A

Additional Journal Information:: Journal Volume: 55; Journal Issue: 12; Journal ID: ISSN 1434-6001

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    Kobayashi, N., Miki, K., Hashimoto, T., Iwamoto, C., Tamii, A., Aoi, N., Carpenter, M. P., Hatanaka, K., Isaak, J., Ideguchi, E., Morinobu, S., Nakamura, S., and Noji, S. Excitation and $\gamma$-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances.  United States: N. p., 2019. 
Web.  doi:10.1140/epja/i2019-12854-7.

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                    Kobayashi, N., Miki, K., Hashimoto, T., Iwamoto, C., Tamii, A., Aoi, N., Carpenter, M. P., Hatanaka, K., Isaak, J., Ideguchi, E., Morinobu, S., Nakamura, S., & Noji, S. Excitation and $\gamma$-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances.  United States.  https://doi.org/10.1140/epja/i2019-12854-7

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                    Kobayashi, N., Miki, K., Hashimoto, T., Iwamoto, C., Tamii, A., Aoi, N., Carpenter, M. P., Hatanaka, K., Isaak, J., Ideguchi, E., Morinobu, S., Nakamura, S., and Noji, S. Sun .  
"Excitation and $\gamma$-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances".  United States.  https://doi.org/10.1140/epja/i2019-12854-7.  https://www.osti.gov/servlets/purl/1607630.

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@article{osti_1607630,

  title        = {Excitation and $\gamma$-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances},

  author       = {Kobayashi, N. and Miki, K. and Hashimoto, T. and Iwamoto, C. and Tamii, A. and Aoi, N. and Carpenter, M. P. and Hatanaka, K. and Isaak, J. and Ideguchi, E. and Morinobu, S. and Nakamura, S. and Noji, S.},

  abstractNote = {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 γ-decay processes by the CAGRA and SCγ LLA efficient γ-detector arrays at the Research Center for Nuclear Physics at Osaka University. Specifically, we describe how we developed a new beamline (GRAF), for γ detection at the target position by placing the spectrometer at an angle of 4.5-19.0° and by transporting the primary beam to a well-shielded beam dump. Experimental conditions and representative data are shown for each of the two γ-detector arrays.},

  doi          = {10.1140/epja/i2019-12854-7},

  journal      = {European Physical Journal. A},

  number       = 12,

  volume       = 55,

  place        = {United States},

  year         = {Sun Dec 01 00:00:00 EST 2019},

  month        = {Sun Dec 01 00:00:00 EST 2019}

}

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Title: Excitation and $$\gamma$$-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances

Abstract

Citation Formats

Heavy-ion Coulomb excitation and photon decay of the giant dipole resonance in Pb 208 journal, March 1990

Proton-induced knockout reactions with polarized and unpolarized beams journal, September 2017

The ( Li 6 , Li * 6 [ 3.56 MeV ] ) reaction at 100 MeV/u as a probe of Gamow-Teller transition strengths in the inelastic scattering channel journal, July 2018

Experimental studies of the Pygmy Dipole Resonance journal, May 2013

Electric and magnetic dipole modes in high-resolution inelastic proton scattering at 0° journal, July 2019

Microscopic theory of the γ decay of nuclear giant resonances journal, January 2012

The Ame2012 atomic mass evaluation journal, December 2012

Spin–isospin excitations probed by strong, weak and electro-magnetic interactions journal, July 2011

Magnetic spectrometer Grand Raiden journal, February 1999

Characterization of large volume 3.5″×8″ LaBr3:Ce detectors journal, November 2013

Isoscalar and isovector dipole excitations: Nuclear properties from low-lying states and from the isovector giant dipole resonance journal, May 2019

Measurement of γ rays from giant resonances excited by the C 12 ( p , p ′ ) reaction at 392 MeV and 0 ∘ journal, August 2019

The compression-mode giant resonances and nuclear incompressibility journal, July 2018

Dominance of Tensor Correlations in High-Momentum Nucleon Pairs Studied by ( p , p d ) Reaction journal, December 2018

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Gamow-Teller transitions to Ca 45 via the Sc 45 ( t , He 3 + γ ) reaction at 115 MeV / u and its application to stellar electron-capture rates journal, August 2015

Charge-exchange reactions and the quest for resolution journal, October 2018

Heavy-ion Coulomb excitation and photon decay of the giant dipole resonance in ${}^{208}{Pb}$
journal, March 1990

Proton-induced knockout reactions with polarized and unpolarized beams
journal, September 2017

The ( ${}^{6}{Li}, {}^{6}{Li}^{*} [3.56 MeV]$ ) reaction at 100 MeV/u as a probe of Gamow-Teller transition strengths in the inelastic scattering channel
journal, July 2018

Experimental studies of the Pygmy Dipole Resonance
journal, May 2013

Electric and magnetic dipole modes in high-resolution inelastic proton scattering at 0°
journal, July 2019

Microscopic theory of the $γ$ decay of nuclear giant resonances
journal, January 2012

The Ame2012 atomic mass evaluation
journal, December 2012

Spin–isospin excitations probed by strong, weak and electro-magnetic interactions
journal, July 2011

Magnetic spectrometer Grand Raiden
journal, February 1999

Characterization of large volume 3.5″×8″ LaBr3:Ce detectors
journal, November 2013

Isoscalar and isovector dipole excitations: Nuclear properties from low-lying states and from the isovector giant dipole resonance
journal, May 2019

Measurement of $γ$ rays from giant resonances excited by the ${}^{12}C (p, p^{'}$ ) reaction at 392 MeV and $0^{\circ}$
journal, August 2019

The compression-mode giant resonances and nuclear incompressibility
journal, July 2018

Dominance of Tensor Correlations in High-Momentum Nucleon Pairs Studied by $(p, p d)$ Reaction
journal, December 2018

Low-energy electric dipole response in 120 Sn
journal, May 2015

Measurement of high energy resolution inelastic proton scattering at and close to zero degrees
journal, July 2009

$β^{+}$ Gamow-Teller Transition Strengths from ${}^{46}{Ti}$ and Stellar Electron-Capture Rates
journal, June 2014

Systematic investigation of low-lying dipole modes using the canonical-basis time-dependent Hartree-Fock-Bogoliubov theory
journal, August 2014

Gamow-Teller transitions to ${}^{45}{Ca}$ via the ${}^{45}{Sc} (t, {}^{3}{He} + γ)$ reaction at $115 MeV / u$ and its application to stellar electron-capture rates
journal, August 2015

Charge-exchange reactions and the quest for resolution
journal, October 2018