Pairing Forces Govern Population of Doubly Magic Ca 54 from Direct Reactions

F. Browne; S. Chen; P. Doornenbal; A. Obertelli; K. Ogata; Y. Utsuno; K. Yoshida; N. L. Achouri; H. Baba; D. Calvet; F. Château; N. Chiga; A. Corsi; M. L. Cortés; A. Delbart; J. M. Gheller; A. Giganon; A. Gillibert; C. Hilaire; T. Isobe; T. Kobayashi; Y. Kubota; V. Lapoux; H. N. Liu; T. Motobayashi; I. Murray; H. Otsu; V. Panin; N. Paul; W. Rodriguez; H. Sakurai; M. Sasano; D. Steppenbeck; L. Stuhl; Y. L. Sun; Y. Togano; T. Uesaka; K. Wimmer; K. Yoneda; O. Aktas; T. Aumann; K. Boretzky; C. Caesar; L. X. Chung; F. Flavigny; S. Franchoo; I. Gasparic; R. B. Gerst; J. Gibelin; K. I. Hahn; M. Holl; J. Kahlbow; D. Kim; D. Körper; T. Koiwai; Y. Kondo; P. Koseoglou; J. Lee; C. Lehr; B. D. Linh; T. Lokotko; M. Maccormick; K. Miki; K. Moschner; T. Nakamura; S. Y. Park; D. Rossi; E. Sahin; F. Schindler; H. Simon; P. A. Söderström; D. Sohler; S. Takeuchi; H. Törnqvist; J. Tscheuschner; V. Vaquero; V. Wagner; S. Wang; V. Werner; X. Xu; H. Yamada; D. Yan; Z. Yang; M. Yasuda; L. Zanetti

doi:10.1103/PhysRevLett.126.252501

Pairing Forces Govern Population of Doubly Magic Ca 54 from Direct Reactions

F. Browne^*, S. Chen, P. Doornenbal, A. Obertelli, K. Ogata, Y. Utsuno, K. Yoshida, N. L. Achouri, H. Baba, D. Calvet, F. Château, N. Chiga, A. Corsi, M. L. Cortés, A. Delbart, J. M. Gheller, A. Giganon, A. Gillibert, C. Hilaire, T. IsobeT. Kobayashi, Y. Kubota, V. Lapoux, H. N. Liu, T. Motobayashi, I. Murray, H. Otsu, V. Panin, N. Paul, W. Rodriguez, H. Sakurai, M. Sasano, D. Steppenbeck, L. Stuhl, Y. L. Sun, Y. Togano, T. Uesaka, K. Wimmer, K. Yoneda, O. Aktas, T. Aumann, K. Boretzky, C. Caesar, L. X. Chung, F. Flavigny, S. Franchoo, I. Gasparic, R. B. Gerst, J. Gibelin, K. I. Hahn, M. Holl, J. Kahlbow, D. Kim, D. Körper, T. Koiwai, Y. Kondo, P. Koseoglou, J. Lee, C. Lehr, B. D. Linh, T. Lokotko, M. Maccormick, K. Miki, K. Moschner, T. Nakamura, S. Y. Park, D. Rossi, E. Sahin, F. Schindler, H. Simon, P. A. Söderström, D. Sohler, S. Takeuchi, H. Törnqvist, J. Tscheuschner, V. Vaquero, V. Wagner, S. Wang, V. Werner, X. Xu, H. Yamada, D. Yan, Z. Yang, M. Yasuda, L. Zanetti

^*Corresponding author for this work

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

Abstract

Direct proton-knockout reactions of Sc55 at ∼220 MeV/nucleon were studied at the RIKEN Radioactive Isotope Beam Factory. Populated states of Ca54 were investigated through γ-ray and invariant-mass spectroscopy. Level energies were calculated from the nuclear shell model employing a phenomenological internucleon interaction. Theoretical cross sections to states were calculated from distorted-wave impulse approximation estimates multiplied by the shell model spectroscopic factors, which describe the wave function overlap of the Sc55 ground state with states in Ca54. Despite the calculations showing a significant amplitude of excited neutron configurations in the ground-state of Sc55, valence proton removals populated predominantly the ground state of Ca54. This counterintuitive result is attributed to pairing effects leading to a dominance of the ground-state spectroscopic factor. Owing to the ubiquity of the pairing interaction, this argument should be generally applicable to direct knockout reactions from odd-even to even-even nuclei.

Original language	English
Article number	252501
Journal	Physical Review Letters
Volume	126
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.126.252501
State	Published - 25 Jun 2021
Externally published	Yes

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10.1103/PhysRevLett.126.252501

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Browne, F., Chen, S., Doornenbal, P., Obertelli, A., Ogata, K., Utsuno, Y., Yoshida, K., Achouri, N. L., Baba, H., Calvet, D., Château, F., Chiga, N., Corsi, A., Cortés, M. L., Delbart, A., Gheller, J. M., Giganon, A., Gillibert, A., Hilaire, C., ... Zanetti, L. (2021). Pairing Forces Govern Population of Doubly Magic Ca 54 from Direct Reactions. Physical Review Letters, 126(25), Article 252501. https://doi.org/10.1103/PhysRevLett.126.252501

@article{d2c411489a334d8db3b2d6abb0d673b7,

title = "Pairing Forces Govern Population of Doubly Magic Ca 54 from Direct Reactions",

abstract = "Direct proton-knockout reactions of Sc55 at ∼220 MeV/nucleon were studied at the RIKEN Radioactive Isotope Beam Factory. Populated states of Ca54 were investigated through γ-ray and invariant-mass spectroscopy. Level energies were calculated from the nuclear shell model employing a phenomenological internucleon interaction. Theoretical cross sections to states were calculated from distorted-wave impulse approximation estimates multiplied by the shell model spectroscopic factors, which describe the wave function overlap of the Sc55 ground state with states in Ca54. Despite the calculations showing a significant amplitude of excited neutron configurations in the ground-state of Sc55, valence proton removals populated predominantly the ground state of Ca54. This counterintuitive result is attributed to pairing effects leading to a dominance of the ground-state spectroscopic factor. Owing to the ubiquity of the pairing interaction, this argument should be generally applicable to direct knockout reactions from odd-even to even-even nuclei.",

author = "F. Browne and S. Chen and P. Doornenbal and A. Obertelli and K. Ogata and Y. Utsuno and K. Yoshida and Achouri, {N. L.} and H. Baba and D. Calvet and F. Ch{\^a}teau and N. Chiga and A. Corsi and Cort{\'e}s, {M. L.} and A. Delbart and Gheller, {J. M.} and A. Giganon and A. Gillibert and C. Hilaire and T. Isobe and T. Kobayashi and Y. Kubota and V. Lapoux and Liu, {H. N.} and T. Motobayashi and I. Murray and H. Otsu and V. Panin and N. Paul and W. Rodriguez and H. Sakurai and M. Sasano and D. Steppenbeck and L. Stuhl and Sun, {Y. L.} and Y. Togano and T. Uesaka and K. Wimmer and K. Yoneda and O. Aktas and T. Aumann and K. Boretzky and C. Caesar and Chung, {L. X.} and F. Flavigny and S. Franchoo and I. Gasparic and Gerst, {R. B.} and J. Gibelin and Hahn, {K. I.} and M. Holl and J. Kahlbow and D. Kim and D. K{\"o}rper and T. Koiwai and Y. Kondo and P. Koseoglou and J. Lee and C. Lehr and Linh, {B. D.} and T. Lokotko and M. Maccormick and K. Miki and K. Moschner and T. Nakamura and Park, {S. Y.} and D. Rossi and E. Sahin and F. Schindler and H. Simon and S{\"o}derstr{\"o}m, {P. A.} and D. Sohler and S. Takeuchi and H. T{\"o}rnqvist and J. Tscheuschner and V. Vaquero and V. Wagner and S. Wang and V. Werner and X. Xu and H. Yamada and D. Yan and Z. Yang and M. Yasuda and L. Zanetti",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

month = jun,

day = "25",

doi = "10.1103/PhysRevLett.126.252501",

language = "אנגלית",

volume = "126",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "25",

}

Browne, F, Chen, S, Doornenbal, P, Obertelli, A, Ogata, K, Utsuno, Y, Yoshida, K, Achouri, NL, Baba, H, Calvet, D, Château, F, Chiga, N, Corsi, A, Cortés, ML, Delbart, A, Gheller, JM, Giganon, A, Gillibert, A, Hilaire, C, Isobe, T, Kobayashi, T, Kubota, Y, Lapoux, V, Liu, HN, Motobayashi, T, Murray, I, Otsu, H, Panin, V, Paul, N, Rodriguez, W, Sakurai, H, Sasano, M, Steppenbeck, D, Stuhl, L, Sun, YL, Togano, Y, Uesaka, T, Wimmer, K, Yoneda, K, Aktas, O, Aumann, T, Boretzky, K, Caesar, C, Chung, LX, Flavigny, F, Franchoo, S, Gasparic, I, Gerst, RB, Gibelin, J, Hahn, KI, Holl, M, Kahlbow, J, Kim, D, Körper, D, Koiwai, T, Kondo, Y, Koseoglou, P, Lee, J, Lehr, C, Linh, BD, Lokotko, T, Maccormick, M, Miki, K, Moschner, K, Nakamura, T, Park, SY, Rossi, D, Sahin, E, Schindler, F, Simon, H, Söderström, PA, Sohler, D, Takeuchi, S, Törnqvist, H, Tscheuschner, J, Vaquero, V, Wagner, V, Wang, S, Werner, V, Xu, X, Yamada, H, Yan, D, Yang, Z, Yasuda, M & Zanetti, L 2021, 'Pairing Forces Govern Population of Doubly Magic Ca 54 from Direct Reactions', Physical Review Letters, vol. 126, no. 25, 252501. https://doi.org/10.1103/PhysRevLett.126.252501

TY - JOUR

T1 - Pairing Forces Govern Population of Doubly Magic Ca 54 from Direct Reactions

AU - Browne, F.

AU - Chen, S.

AU - Doornenbal, P.

AU - Obertelli, A.

AU - Ogata, K.

AU - Utsuno, Y.

AU - Yoshida, K.

AU - Achouri, N. L.

AU - Baba, H.

AU - Calvet, D.

AU - Château, F.

AU - Chiga, N.

AU - Corsi, A.

AU - Cortés, M. L.

AU - Delbart, A.

AU - Gheller, J. M.

AU - Giganon, A.

AU - Gillibert, A.

AU - Hilaire, C.

AU - Isobe, T.

AU - Kobayashi, T.

AU - Kubota, Y.

AU - Lapoux, V.

AU - Liu, H. N.

AU - Motobayashi, T.

AU - Murray, I.

AU - Otsu, H.

AU - Panin, V.

AU - Paul, N.

AU - Rodriguez, W.

AU - Sakurai, H.

AU - Sasano, M.

AU - Steppenbeck, D.

AU - Stuhl, L.

AU - Sun, Y. L.

AU - Togano, Y.

AU - Uesaka, T.

AU - Wimmer, K.

AU - Yoneda, K.

AU - Aktas, O.

AU - Aumann, T.

AU - Boretzky, K.

AU - Caesar, C.

AU - Chung, L. X.

AU - Flavigny, F.

AU - Franchoo, S.

AU - Gasparic, I.

AU - Gerst, R. B.

AU - Gibelin, J.

AU - Hahn, K. I.

AU - Holl, M.

AU - Kahlbow, J.

AU - Kim, D.

AU - Körper, D.

AU - Koiwai, T.

AU - Kondo, Y.

AU - Koseoglou, P.

AU - Lee, J.

AU - Lehr, C.

AU - Linh, B. D.

AU - Lokotko, T.

AU - Maccormick, M.

AU - Miki, K.

AU - Moschner, K.

AU - Nakamura, T.

AU - Park, S. Y.

AU - Rossi, D.

AU - Sahin, E.

AU - Schindler, F.

AU - Simon, H.

AU - Söderström, P. A.

AU - Sohler, D.

AU - Takeuchi, S.

AU - Törnqvist, H.

AU - Tscheuschner, J.

AU - Vaquero, V.

AU - Wagner, V.

AU - Wang, S.

AU - Werner, V.

AU - Xu, X.

AU - Yamada, H.

AU - Yan, D.

AU - Yang, Z.

AU - Yasuda, M.

AU - Zanetti, L.

PY - 2021/6/25

Y1 - 2021/6/25

N2 - Direct proton-knockout reactions of Sc55 at ∼220 MeV/nucleon were studied at the RIKEN Radioactive Isotope Beam Factory. Populated states of Ca54 were investigated through γ-ray and invariant-mass spectroscopy. Level energies were calculated from the nuclear shell model employing a phenomenological internucleon interaction. Theoretical cross sections to states were calculated from distorted-wave impulse approximation estimates multiplied by the shell model spectroscopic factors, which describe the wave function overlap of the Sc55 ground state with states in Ca54. Despite the calculations showing a significant amplitude of excited neutron configurations in the ground-state of Sc55, valence proton removals populated predominantly the ground state of Ca54. This counterintuitive result is attributed to pairing effects leading to a dominance of the ground-state spectroscopic factor. Owing to the ubiquity of the pairing interaction, this argument should be generally applicable to direct knockout reactions from odd-even to even-even nuclei.

AB - Direct proton-knockout reactions of Sc55 at ∼220 MeV/nucleon were studied at the RIKEN Radioactive Isotope Beam Factory. Populated states of Ca54 were investigated through γ-ray and invariant-mass spectroscopy. Level energies were calculated from the nuclear shell model employing a phenomenological internucleon interaction. Theoretical cross sections to states were calculated from distorted-wave impulse approximation estimates multiplied by the shell model spectroscopic factors, which describe the wave function overlap of the Sc55 ground state with states in Ca54. Despite the calculations showing a significant amplitude of excited neutron configurations in the ground-state of Sc55, valence proton removals populated predominantly the ground state of Ca54. This counterintuitive result is attributed to pairing effects leading to a dominance of the ground-state spectroscopic factor. Owing to the ubiquity of the pairing interaction, this argument should be generally applicable to direct knockout reactions from odd-even to even-even nuclei.

UR - http://www.scopus.com/inward/record.url?scp=85108908223&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.126.252501

DO - 10.1103/PhysRevLett.126.252501

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C2 - 34241497

AN - SCOPUS:85108908223

SN - 0031-9007

VL - 126

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 252501

ER -

Pairing Forces Govern Population of Doubly Magic Ca 54 from Direct Reactions

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