Probing the pygmy dipole resonance of 50Ca by Coulomb excitation

J. Lemarié; Y. Togano; T. Nakamura; T. Kobayashi; T. Aumann; H. Baba; K. Boretzky; A. Bracco; F. Browne; F. Camera; H. Chae; S. Chan; N. Chiga; H. Choi; L. Cortés; F. Delaunay; D. Dell'Aquila; Z. Elekes; Y. Fujino; I. Gašparić; J. Gibelin; K. I. Hahn; Z. Halasz; A. Horvat; K. Ieki; T. Inakura; T. Isobe; D. Kim; G. Kim; H. Ko; Y. Kondo; D. Körper; S. Koyama; Y. Kubota; I. Kuti; M. Matsumoto; A. Matta; B. Million; T. Motobayashi; I. Murray; N. Nakatsuka; N. Orr; H. Otsu; V. Panin; S. Y. Park; H. Simon; L. Stuhl; Y. L. Sun; S. Takeuchi; T. Tomai; H. Törnqvist; T. Uesaka; V. Vaquero; O. Wieland; K. Wimmer; H. Yamada; Z. Yang; M. Yasuda; K. Yoneda

doi:10.1016/j.nuclphysa.2025.123152

Probing the pygmy dipole resonance of ⁵⁰Ca by Coulomb excitation

J. Lemarié^*
, Y. Togano
, T. Nakamura
, T. Kobayashi
, T. Aumann
, H. Baba
, K. Boretzky
, A. Bracco
, F. Browne
, F. Camera
, H. Chae
, S. Chan
, N. Chiga
, H. Choi
, L. Cortés
, F. Delaunay
, D. Dell'Aquila
, Z. Elekes
, Y. Fujino
, I. Gašparić

J. Gibelin, K. I. Hahn, Z. Halasz, A. Horvat, K. Ieki, T. Inakura, T. Isobe, D. Kim, G. Kim, H. Ko, Y. Kondo, D. Körper, S. Koyama, Y. Kubota, I. Kuti, M. Matsumoto, A. Matta, B. Million, T. Motobayashi, I. Murray, N. Nakatsuka, N. Orr, H. Otsu, V. Panin, S. Y. Park, H. Simon, L. Stuhl, Y. L. Sun, S. Takeuchi, T. Tomai, H. Törnqvist, T. Uesaka, V. Vaquero, O. Wieland, K. Wimmer, H. Yamada, Z. Yang, M. Yasuda, K. Yoneda

^*Corresponding author for this work

RIKEN
Rikkyo University
Institute of Science Tokyo
Tohoku University
Technische Universität Darmstadt
GSI Helmholtz Centre for Heavy Ion Research
University of Milan
National Institute for Nuclear Physics
Seoul National University
ISMRA et Université de Caen
IPN Orsay
Institute for Nuclear Research
Ruder Boskovic Institute
Ewha Womans University
The University of Tokyo
Kyoto University
Consejo Superior de Investigaciones Científicas

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

Abstract

An experiment to measure the electric dipole response of ⁵⁰Ca by Coulomb excitation in inverse kinematics has been carried out at RIKEN - RIBF. The combination of the SAMURAI spectrometer, the γ-ray detector array CATANA and both NeuLAND demonstrator and NEBULA for neutron detection allow to reconstruct the excitation energy spectra by invariant mass spectroscopy. The reaction channels ⁵⁰Ca → ⁴⁹Ca+n and ⁵⁰Ca → ⁴⁸Ca+n+n have been investigated. One sharp peak at low neutron relative energy for the 1 neutron emission channel may be a candidate for a Pygmy Dipole Resonance. Correlation of γ-ray and neutron energy shows possible structure effect in the decay of the ⁵⁰Ca projectile.

Original language	English
Article number	123152
Journal	Nuclear Physics A
Volume	1062
DOIs	https://doi.org/10.1016/j.nuclphysa.2025.123152
State	Published - Oct 2025
Externally published	Yes

Keywords

Calcium isotopes
Giant resonances
Nuclear structure

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10.1016/j.nuclphysa.2025.123152

Cite this

Lemarié, J., Togano, Y., Nakamura, T., Kobayashi, T., Aumann, T., Baba, H., Boretzky, K., Bracco, A., Browne, F., Camera, F., Chae, H., Chan, S., Chiga, N., Choi, H., Cortés, L., Delaunay, F., Dell'Aquila, D., Elekes, Z., Fujino, Y., ... Yoneda, K. (2025). Probing the pygmy dipole resonance of ⁵⁰Ca by Coulomb excitation. Nuclear Physics A, 1062, Article 123152. https://doi.org/10.1016/j.nuclphysa.2025.123152

@article{e917455b9cd94f74a8069c60f94961e4,

title = "Probing the pygmy dipole resonance of 50Ca by Coulomb excitation",

abstract = "An experiment to measure the electric dipole response of 50Ca by Coulomb excitation in inverse kinematics has been carried out at RIKEN - RIBF. The combination of the SAMURAI spectrometer, the γ-ray detector array CATANA and both NeuLAND demonstrator and NEBULA for neutron detection allow to reconstruct the excitation energy spectra by invariant mass spectroscopy. The reaction channels 50Ca → 49Ca+n and 50Ca → 48Ca+n+n have been investigated. One sharp peak at low neutron relative energy for the 1 neutron emission channel may be a candidate for a Pygmy Dipole Resonance. Correlation of γ-ray and neutron energy shows possible structure effect in the decay of the 50Ca projectile.",

keywords = "Calcium isotopes, Giant resonances, Nuclear structure",

author = "J. Lemari{\'e} and Y. Togano and T. Nakamura and T. Kobayashi and T. Aumann and H. Baba and K. Boretzky and A. Bracco and F. Browne and F. Camera and H. Chae and S. Chan and N. Chiga and H. Choi and L. Cort{\'e}s and F. Delaunay and D. Dell'Aquila and Z. Elekes and Y. Fujino and I. Ga{\v s}pari{\'c} and J. Gibelin and Hahn, \{K. I.\} and Z. Halasz and A. Horvat and K. Ieki and T. Inakura and T. Isobe and D. Kim and G. Kim and H. Ko and Y. Kondo and D. K{\"o}rper and S. Koyama and Y. Kubota and I. Kuti and M. Matsumoto and A. Matta and B. Million and T. Motobayashi and I. Murray and N. Nakatsuka and N. Orr and H. Otsu and V. Panin and Park, \{S. Y.\} and H. Simon and L. Stuhl and Sun, \{Y. L.\} and S. Takeuchi and T. Tomai and H. T{\"o}rnqvist and T. Uesaka and V. Vaquero and O. Wieland and K. Wimmer and H. Yamada and Z. Yang and M. Yasuda and K. Yoneda",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2025",

month = oct,

doi = "10.1016/j.nuclphysa.2025.123152",

language = "英语",

volume = "1062",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier B.V.",

}

Lemarié, J, Togano, Y, Nakamura, T, Kobayashi, T, Aumann, T, Baba, H, Boretzky, K, Bracco, A, Browne, F, Camera, F, Chae, H, Chan, S, Chiga, N, Choi, H, Cortés, L, Delaunay, F, Dell'Aquila, D, Elekes, Z, Fujino, Y, Gašparić, I, Gibelin, J, Hahn, KI, Halasz, Z, Horvat, A, Ieki, K, Inakura, T, Isobe, T, Kim, D, Kim, G, Ko, H, Kondo, Y, Körper, D, Koyama, S, Kubota, Y, Kuti, I, Matsumoto, M, Matta, A, Million, B, Motobayashi, T, Murray, I, Nakatsuka, N, Orr, N, Otsu, H, Panin, V, Park, SY, Simon, H, Stuhl, L, Sun, YL, Takeuchi, S, Tomai, T, Törnqvist, H, Uesaka, T, Vaquero, V, Wieland, O, Wimmer, K, Yamada, H, Yang, Z, Yasuda, M & Yoneda, K 2025, 'Probing the pygmy dipole resonance of ⁵⁰Ca by Coulomb excitation', Nuclear Physics A, vol. 1062, 123152. https://doi.org/10.1016/j.nuclphysa.2025.123152

TY - JOUR

T1 - Probing the pygmy dipole resonance of 50Ca by Coulomb excitation

AU - Lemarié, J.

AU - Togano, Y.

AU - Nakamura, T.

AU - Kobayashi, T.

AU - Aumann, T.

AU - Baba, H.

AU - Boretzky, K.

AU - Bracco, A.

AU - Browne, F.

AU - Camera, F.

AU - Chae, H.

AU - Chan, S.

AU - Chiga, N.

AU - Choi, H.

AU - Cortés, L.

AU - Delaunay, F.

AU - Dell'Aquila, D.

AU - Elekes, Z.

AU - Fujino, Y.

AU - Gašparić, I.

AU - Gibelin, J.

AU - Hahn, K. I.

AU - Halasz, Z.

AU - Horvat, A.

AU - Ieki, K.

AU - Inakura, T.

AU - Isobe, T.

AU - Kim, D.

AU - Kim, G.

AU - Ko, H.

AU - Kondo, Y.

AU - Körper, D.

AU - Koyama, S.

AU - Kubota, Y.

AU - Kuti, I.

AU - Matsumoto, M.

AU - Matta, A.

AU - Million, B.

AU - Motobayashi, T.

AU - Murray, I.

AU - Nakatsuka, N.

AU - Orr, N.

AU - Otsu, H.

AU - Panin, V.

AU - Park, S. Y.

AU - Simon, H.

AU - Stuhl, L.

AU - Sun, Y. L.

AU - Takeuchi, S.

AU - Tomai, T.

AU - Törnqvist, H.

AU - Uesaka, T.

AU - Vaquero, V.

AU - Wieland, O.

AU - Wimmer, K.

AU - Yamada, H.

AU - Yang, Z.

AU - Yasuda, M.

AU - Yoneda, K.

PY - 2025/10

Y1 - 2025/10

N2 - An experiment to measure the electric dipole response of 50Ca by Coulomb excitation in inverse kinematics has been carried out at RIKEN - RIBF. The combination of the SAMURAI spectrometer, the γ-ray detector array CATANA and both NeuLAND demonstrator and NEBULA for neutron detection allow to reconstruct the excitation energy spectra by invariant mass spectroscopy. The reaction channels 50Ca → 49Ca+n and 50Ca → 48Ca+n+n have been investigated. One sharp peak at low neutron relative energy for the 1 neutron emission channel may be a candidate for a Pygmy Dipole Resonance. Correlation of γ-ray and neutron energy shows possible structure effect in the decay of the 50Ca projectile.

AB - An experiment to measure the electric dipole response of 50Ca by Coulomb excitation in inverse kinematics has been carried out at RIKEN - RIBF. The combination of the SAMURAI spectrometer, the γ-ray detector array CATANA and both NeuLAND demonstrator and NEBULA for neutron detection allow to reconstruct the excitation energy spectra by invariant mass spectroscopy. The reaction channels 50Ca → 49Ca+n and 50Ca → 48Ca+n+n have been investigated. One sharp peak at low neutron relative energy for the 1 neutron emission channel may be a candidate for a Pygmy Dipole Resonance. Correlation of γ-ray and neutron energy shows possible structure effect in the decay of the 50Ca projectile.

KW - Calcium isotopes

KW - Giant resonances

KW - Nuclear structure

UR - https://www.scopus.com/pages/publications/105004939974

U2 - 10.1016/j.nuclphysa.2025.123152

DO - 10.1016/j.nuclphysa.2025.123152

M3 - 文章

AN - SCOPUS:105004939974

SN - 0375-9474

VL - 1062

JO - Nuclear Physics A

JF - Nuclear Physics A

M1 - 123152

ER -

Probing the pygmy dipole resonance of ⁵⁰Ca by Coulomb excitation

Abstract

Keywords

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