Reduction of spectroscopic overlap across the Z = 8 shell in neutron-rich nuclei

Redpath, T.; Guèye, P.; Baumann, T.; Brown, B. A.; Cunningham, A.; DeYoung, P. A.; Frank, N.; Hoffman, C. R.; Kuchera, A. N.; Godoy, B. Monteagudo; Persch, C.; Revel, A.; Rogers, W. F.; Thoennessen, M.; Tostevin, J. A.; Votaw, D.

doi:10.1103/physrevc.109.054325

Title: Reduction of spectroscopic overlap across the Z = 8 shell in neutron-rich nuclei

Journal Article · 23 May 2024 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.109.054325 · OSTI ID:2361188

^[1];

^[2];

^[2]; Cunningham, A. ^[3];

^[4];

^[5];

^[6];

^[7]; Godoy, B. Monteagudo ^[4];

^[8];

^[2];

^[9];

^[2];

^[10];

^[11]

Michigan State University, East Lansing, MI (United States); Virginia State University, Petersburg, VA (United States)
Michigan State University, East Lansing, MI (United States)
Virginia State University, Petersburg, VA (United States); Morehouse School of Medicine, Atlanta, GA (United States)
Hope College, Holland, MI (United States)
Augustana College, Rock Island, IL (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Davidson College, NC (United States)
Hope College, Holland, MI (United States); University of Colorado, Boulder, CO (United States)
Indiana Wesleyan University, Marion, IN (United States)
University of Surrey, Guildford (United Kingdom)
Michigan State University, East Lansing, MI (United States); US Dept. of Defense, Washington, DC (United States)

The recent discovery and spectroscopic measurements of ²⁷O and ²⁸O suggests the disappearance of the N = 20 shell structure in these neutron-rich oxygen isotopes. We measured one- and two-proton removal cross sections from ²⁷F and ²⁹N, respectively, extracting spectroscopic factors and comparing them to shell model overlap functions coupled with eikonal reaction model calculations. The invariant mass technique was used to reconstruct the two-body (²⁴O + n) and three-body (²⁴O + 2n) decay energies from knockout reactions of ²⁷F (106.2 MeV/u) and ²⁹Ne (112.8 MeV/u) beams impinging on a ⁹Be target. The one-proton removal from ²⁷F strongly populated the ground state of ²⁶O and the extracted cross section of $$3.4^{+0.3}_{-1.5}$$ mb agrees with eikonal model calculations that are normalized by the shell model spectroscopic factors and account for the systematic reduction factor observed for single nucleon removal reactions within the models used. For the two-proton removal reaction from ²⁹Ne an upper limit of 0.08 mb was extracted for populating states in ²⁷O decaying though the ground state of ²⁶O. The measured upper limit for the population of the ground state of ²⁶O in the two-proton removal reaction from ²⁹Ne indicates a significant difference in the underlying nuclear structure of ²⁷F and ²⁹Ne.

View Journal Article

Cite

Export

Save

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); Science and Technology Facilities Council (STFC); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357; NA0003180; SC0022075

OSTI ID:: 2361188

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 5 Vol. 109; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (42)

Commissioning the A1900 projectile fragment separator Morrissey, D. J.; Sherrill, B. M.; Steiner, M. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 204 https://doi.org/10.1016/S0168-583X(02)01895-5	journal	May 2003
Search for 28O and study of neutron-rich nuclei near the N = 20 shell closure Tarasov, O.; Allatt, R.; Angélique, J. C. Physics Letters B, Vol. 409, Issue 1-4 https://doi.org/10.1016/S0370-2693(97)00901-5	journal	September 1997
Evidence for particle stability of F and particle instability of N and O Sakurai, H.; Lukyanov, S. M.; Notani, M. Physics Letters B, Vol. 448, Issue 3-4 https://doi.org/10.1016/S0370-2693(99)00015-5	journal	February 1999
Construction of a modular large-area neutron detector for the NSCL Baumann, T.; Boike, J.; Brown, J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 543, Issue 2-3 https://doi.org/10.1016/j.nima.2004.12.020	journal	May 2005
Modeling interactions of intermediate-energy neutrons in a plastic scintillator array with Geant4 Kohley, Z.; Lunderberg, E.; DeYoung, P. A. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 682 https://doi.org/10.1016/j.nima.2012.04.060	journal	August 2012
New segmented target for studies of neutron unbound systems Redpath, T.; Baumann, T.; Brown, J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 977 https://doi.org/10.1016/j.nima.2020.164284	journal	October 2020
Quadrupole collectivity of 28Ne and the boundary of the island of inversion Iwasaki, H.; Motobayashi, T.; Sakurai, H. Physics Letters B, Vol. 620, Issue 3-4 https://doi.org/10.1016/j.physletb.2005.06.032	journal	August 2005
Shell gap reduction in neutron-rich N=17 nuclei Obertelli, A.; Gillibert, A.; Alamanos, N. Physics Letters B, Vol. 633, Issue 1 https://doi.org/10.1016/j.physletb.2005.11.033	journal	February 2006
Direct evidence for the onset of intruder configurations in neutron-rich Ne isotopes Terry, J. R.; Bazin, D.; Brown, B. A. Physics Letters B, Vol. 640, Issue 3 https://doi.org/10.1016/j.physletb.2006.06.061	journal	September 2006
Intruder configurations in the ground state of 30 Ne Liu, H. N.; Lee, J.; Doornenbal, P. Physics Letters B, Vol. 767 https://doi.org/10.1016/j.physletb.2017.01.052	journal	April 2017
Large collectivity in 29Ne at the boundary of the island of inversion Revel, A.; Wu, J.; Iwasaki, H. Physics Letters B, Vol. 838 https://doi.org/10.1016/j.physletb.2023.137704	journal	March 2023
Intruder configurations in 29Ne at the transition into the island of inversion: Detailed structure study of 28Ne Wang, H.; Yasuda, M.; Kondo, Y. Physics Letters B, Vol. 843 https://doi.org/10.1016/j.physletb.2023.138038	journal	August 2023
The impact of nuclear shape on the emergence of the neutron dripline Tsunoda, Naofumi; Otsuka, Takaharu; Takayanagi, Kazuo Nature, Vol. 587, Issue 7832 https://doi.org/10.1038/s41586-020-2848-x	journal	November 2020
First observation of 28O Kondo, Y.; Achouri, N. L.; Falou, H. Al Nature, Vol. 620, Issue 7976 https://doi.org/10.1038/s41586-023-06352-6	journal	August 2023
Commissioning of the Coupled Cyclotron system at NSCL Marti, F. CYCLOCTRONS AND THEIR APPLICATIONS 2001: Sixteenth International Conference, AIP Conference Proceedings https://doi.org/10.1063/1.1435199	conference	January 2001
The AME 2020 atomic mass evaluation (II). Tables, graphs and references* Wang, Meng; Huang, W. J.; Kondev, F. G. Chinese Physics C, Vol. 45, Issue 3 https://doi.org/10.1088/1674-1137/abddaf	journal	March 2021
Updated systematics of intermediate-energy single-nucleon removal cross sections Tostevin, J. A.; Gade, A. Physical Review C, Vol. 103, Issue 5 https://doi.org/10.1103/PhysRevC.103.054610	journal	May 2021
Border of the island of inversion: Unbound states in Ne29 Holl, M.; Lindberg, S.; Heinz, A. Physical Review C, Vol. 105, Issue 3 https://doi.org/10.1103/PhysRevC.105.034301	journal	March 2022
Core of F25 studied by the F25(−p ) proton-removal reaction Crawford, H. L.; Jones, M. D.; Macchiavelli, A. O. Physical Review C, Vol. 106, Issue 6 https://doi.org/10.1103/PhysRevC.106.L061303	journal	December 2022
Mass systematics for A =29–44 nuclei: The deformed A ∼32 region Warburton, E. K.; Becker, J. A.; Brown, B. A. Physical Review C, Vol. 41, Issue 3 https://doi.org/10.1103/PhysRevC.41.1147	journal	March 1990
Particle stability of the isotopes O 26 and Ne 32 in the reaction 44 MeV/nucleon Ca 48 +Ta Guillemaud-Mueller, D.; Jacmart, J. C.; Kashy, E. Physical Review C, Vol. 41, Issue 3 https://doi.org/10.1103/PhysRevC.41.937	journal	March 1990
Single proton knock-out reactions from F 24 , 25 , 26 Thoennessen, M.; Baumann, T.; Brown, B. A. Physical Review C, Vol. 68, Issue 4 https://doi.org/10.1103/PhysRevC.68.044318	journal	October 2003
Diffraction dissociation contributions to two-nucleon knockout reactions and the suppression of shell-model strength Tostevin, J. A.; Brown, B. A. Physical Review C, Vol. 74, Issue 6 https://doi.org/10.1103/PhysRevC.74.064604	journal	December 2006
Low-lying neutron f p -shell intruder states in 27 Ne Brown, S. M.; Catford, W. N.; Thomas, J. S. Physical Review C, Vol. 85, Issue 1 https://doi.org/10.1103/PhysRevC.85.011302	journal	January 2012
Beyond the neutron drip line: The unbound oxygen isotopes 25 O and 26 O Caesar, C.; Simonis, J.; Adachi, T. Physical Review C, Vol. 88, Issue 3 https://doi.org/10.1103/PhysRevC.88.034313	journal	September 2013
One-neutron removal from Ne 29 : Defining the lower limits of the island of inversion Kobayashi, N.; Nakamura, T.; Kondo, Y. Physical Review C, Vol. 93, Issue 1 https://doi.org/10.1103/PhysRevC.93.014613	journal	January 2016
Low- Z shore of the “island of inversion” and the reduced neutron magicity toward O 28 Doornenbal, P.; Scheit, H.; Takeuchi, S. Physical Review C, Vol. 95, Issue 4 https://doi.org/10.1103/PhysRevC.95.041301	journal	April 2017
Continuum effects in neutron-drip-line oxygen isotopes Fossez, K.; Rotureau, J.; Michel, N. Physical Review C, Vol. 96, Issue 2 https://doi.org/10.1103/PhysRevC.96.024308	journal	August 2017
Search for excited states in O 25 Jones, M. D.; Fossez, K.; Baumann, T. Physical Review C, Vol. 96, Issue 5 https://doi.org/10.1103/PhysRevC.96.054322	journal	November 2017
Evidence for the Ground-State Resonance of O 26 Lunderberg, E.; DeYoung, P. A.; Kohley, Z. Physical Review Letters, Vol. 108, Issue 14 https://doi.org/10.1103/PhysRevLett.108.142503	journal	April 2012
Study of Two-Neutron Radioactivity in the Decay of O 26 Kohley, Z.; Baumann, T.; Bazin, D. Physical Review Letters, Vol. 110, Issue 15 https://doi.org/10.1103/PhysRevLett.110.152501	journal	April 2013
Nucleus O 26 : A Barely Unbound System beyond the Drip Line Kondo, Y.; Nakamura, T.; Tanaka, R. Physical Review Letters, Vol. 116, Issue 10 https://doi.org/10.1103/PhysRevLett.116.102503	journal	March 2016
Location of the Neutron Dripline at Fluorine and Neon Ahn, D. S.; Fukuda, N.; Geissel, H. Physical Review Letters, Vol. 123, Issue 21 https://doi.org/10.1103/PhysRevLett.123.212501	journal	November 2019
Extending the Southern Shore of the Island of Inversion to F 28 Revel, A.; Sorlin, O.; Marqués, F. M. Physical Review Letters, Vol. 124, Issue 15 https://doi.org/10.1103/PhysRevLett.124.152502	journal	April 2020
How Different is the Core of F 25 from O g . s . 24 ? Tang, T. L.; Uesaka, T.; Kawase, S. Physical Review Letters, Vol. 124, Issue 21 https://doi.org/10.1103/PhysRevLett.124.212502	journal	May 2020
Two-Neutron Halo is Unveiled in F 29 Bagchi, S.; Kanungo, R.; Tanaka, Y. K. Physical Review Letters, Vol. 124, Issue 22 https://doi.org/10.1103/PhysRevLett.124.222504	journal	June 2020
VanishingN=20Shell Gap: Study of Excited States inNe27,28 Dombrádi, Zs.; Elekes, Z.; Saito, A. Physical Review Letters, Vol. 96, Issue 18 https://doi.org/10.1103/PhysRevLett.96.182501	journal	May 2006
Selective Population and Neutron Decay of an Excited State of O 23 Schiller, A.; Frank, N.; Baumann, T. Physical Review Letters, Vol. 99, Issue 11 https://doi.org/10.1103/PhysRevLett.99.112501	journal	September 2007
Evolution of the N = 20 and 28 shell gaps and two-particle-two-hole states in the FSU interaction Lubna, R. S.; Kravvaris, K.; Tabor, S. L. Physical Review Research, Vol. 2, Issue 4 https://doi.org/10.1103/PhysRevResearch.2.043342	journal	December 2020
System Testing and Installation of the NHMFL/NSCL Sweeper Magnet Bird, M. D.; Kenney, S. J.; Toth, J. IEEE Transactions on Appiled Superconductivity, Vol. 15, Issue 2 https://doi.org/10.1109/TASC.2005.849553	journal	June 2005
D IRECT R EACTIONS WITH E XOTIC N UCLEI Hansen, P. G.; Tostevin, J. A. Annual Review of Nuclear and Particle Science, Vol. 53, Issue 1 https://doi.org/10.1146/annurev.nucl.53.041002.110406	journal	December 2003
The Nuclear Shell Model towards the Drip Lines Brown, B. Alex Physics, Vol. 4, Issue 2 https://doi.org/10.3390/physics4020035	journal	May 2022

Similar Records

Extending the Southern Shore of the Island of Inversion to

{}^{28}F

Journal Article · 2020 · Physical Review Letters · OSTI ID:1630826

Revel, A.; Sorlin, O.; Marqués, F. M.; +89 more

Neutron-unbound states in {sup 25,26}F

Journal Article · 2011 · Physical Review. C, Nuclear Physics · OSTI ID:21596799

Frank, N; Albertson, D; Luther, B; +16 more

High-resolution radioactive beam study of the $^{26}\hbox {Al}(d,p$) reaction and measurements of single-particle spectroscopic factors

Journal Article · 2020 · European Physical Journal. A · OSTI ID:1779460

Lotay, G.; Woods, P. J.; Moukaddam, M.; +8 more

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Title: Reduction of spectroscopic overlap across the Z = 8 shell in neutron-rich nuclei

Citation Formats

References (42)

Similar Records

Related Subjects