Physics Letters B (Dec 2020)
Low-lying single-particle structure of 17C and the N = 14 sub-shell closure
- X. Pereira-López,
- B. Fernández-Domínguez,
- F. Delaunay,
- N.L. Achouri,
- N.A. Orr,
- W.N. Catford,
- M. Assié,
- S. Bailey,
- B. Bastin,
- Y. Blumenfeld,
- R. Borcea,
- M. Caamaño,
- L. Caceres,
- E. Clément,
- A. Corsi,
- N. Curtis,
- Q. Deshayes,
- F. Farget,
- M. Fisichella,
- G. de France,
- S. Franchoo,
- M. Freer,
- J. Gibelin,
- A. Gillibert,
- G.F. Grinyer,
- F. Hammache,
- O. Kamalou,
- A. Knapton,
- T. Kokalova,
- V. Lapoux,
- J.A. Lay,
- B. Le Crom,
- S. Leblond,
- J. Lois-Fuentes,
- F.M. Marqués,
- A. Matta,
- P. Morfouace,
- A.M. Moro,
- T. Otsuka,
- J. Pancin,
- L. Perrot,
- J. Piot,
- E. Pollacco,
- D. Ramos,
- C. Rodríguez-Tajes,
- T. Roger,
- F. Rotaru,
- M. Sénoville,
- N. de Séréville,
- R. Smith,
- O. Sorlin,
- M. Stanoiu,
- I. Stefan,
- C. Stodel,
- D. Suzuki,
- T. Suzuki,
- J.C. Thomas,
- N. Timofeyuk,
- M. Vandebrouck,
- J. Walshe,
- C. Wheldon
Affiliations
- X. Pereira-López
- IGFAE and Dpt. de Física de Partículas, Univ. of Santiago de Compostela, E-15758, Santiago de Compostela, Spain; LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA; Department of Physics, University of York, Heslington, York YO10 5DD, UK; Corresponding author.
- B. Fernández-Domínguez
- IGFAE and Dpt. de Física de Partículas, Univ. of Santiago de Compostela, E-15758, Santiago de Compostela, Spain
- F. Delaunay
- LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
- N.L. Achouri
- LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
- N.A. Orr
- LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
- W.N. Catford
- Department of Physics, University of Surrey, Guildford GU2 5XH, UK
- M. Assié
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- S. Bailey
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- B. Bastin
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- Y. Blumenfeld
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- R. Borcea
- IFIN-HH, P. O. Box MG-6, 76900 Bucharest-Magurele, Romania
- M. Caamaño
- IGFAE and Dpt. de Física de Partículas, Univ. of Santiago de Compostela, E-15758, Santiago de Compostela, Spain
- L. Caceres
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- E. Clément
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- A. Corsi
- Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- N. Curtis
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- Q. Deshayes
- LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
- F. Farget
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- M. Fisichella
- INFN, Laboratori Nazionali del Sud, Via S. Sofia 44, Catania, Italy
- G. de France
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- S. Franchoo
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- M. Freer
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- J. Gibelin
- LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
- A. Gillibert
- Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- G.F. Grinyer
- Department of Physics, University of Regina, Regina, SK S4S 0A2, Canada
- F. Hammache
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- O. Kamalou
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- A. Knapton
- Department of Physics, University of Surrey, Guildford GU2 5XH, UK
- T. Kokalova
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- V. Lapoux
- Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- J.A. Lay
- Departamento de FAMN, Facultad de Física, Universidad de Sevilla, Apdo. 1065, E-41080 Sevilla, Spain; Instituto Interuniversitario Carlos I de Física Teórica y Computacional iC1, Apdo. 1065, E-41080 Sevilla, Spain
- B. Le Crom
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- S. Leblond
- LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
- J. Lois-Fuentes
- IGFAE and Dpt. de Física de Partículas, Univ. of Santiago de Compostela, E-15758, Santiago de Compostela, Spain
- F.M. Marqués
- LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
- A. Matta
- Department of Physics, University of Surrey, Guildford GU2 5XH, UK
- P. Morfouace
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- A.M. Moro
- Departamento de FAMN, Facultad de Física, Universidad de Sevilla, Apdo. 1065, E-41080 Sevilla, Spain; Instituto Interuniversitario Carlos I de Física Teórica y Computacional iC1, Apdo. 1065, E-41080 Sevilla, Spain
- T. Otsuka
- CNS, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
- J. Pancin
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- L. Perrot
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- J. Piot
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- E. Pollacco
- Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- D. Ramos
- IGFAE and Dpt. de Física de Partículas, Univ. of Santiago de Compostela, E-15758, Santiago de Compostela, Spain
- C. Rodríguez-Tajes
- IGFAE and Dpt. de Física de Partículas, Univ. of Santiago de Compostela, E-15758, Santiago de Compostela, Spain; GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- T. Roger
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- F. Rotaru
- IFIN-HH, P. O. Box MG-6, 76900 Bucharest-Magurele, Romania
- M. Sénoville
- Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- N. de Séréville
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- R. Smith
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- O. Sorlin
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- M. Stanoiu
- IFIN-HH, P. O. Box MG-6, 76900 Bucharest-Magurele, Romania
- I. Stefan
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- C. Stodel
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- D. Suzuki
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- T. Suzuki
- CNS, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
- J.C. Thomas
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- N. Timofeyuk
- Department of Physics, University of Surrey, Guildford GU2 5XH, UK
- M. Vandebrouck
- GANIL, CEA/DRF-CNRS/IN2P3, Bd. Henri Becquerel, BP 55027, F-14076 Caen, France
- J. Walshe
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- C. Wheldon
- School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- Journal volume & issue
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Vol. 811
p. 135939
Abstract
The first investigation of the single-particle structure of the bound states of 17C, via the d(16C,p) transfer reaction, has been undertaken. The measured angular distributions confirm the spin-parity assignments of 1/2+ and 5/2+ for the excited states located at 217 and 335 keV, respectively. The spectroscopic factors deduced for these states exhibit a marked single-particle character, in agreement with shell model and particle-core model calculations, and combined with their near degeneracy in energy provide clear evidence for the absence of the N=14 sub-shell closure. The very small spectroscopic factor found for the 3/2+ ground state is consistent with theoretical predictions and indicates that the ν1d3/2 strength is carried by unbound states. With a dominant ℓ=0 valence neutron configuration and a very low separation energy, the 1/2+ excited state is a one-neutron halo candidate.
