The evidence of N = 16 shell closure and β-delayed neutron emission from 25F

J. F. Peltier; Z. Y. Xu; I. Cox; R. Grzywacz; R. S. Lubna; N. Kitamura; S. Neupane; J. M. Allmond; J. Christie; A. A. Doetsch; P. Dyszel; T. Gaballah; T. T. King; K. Kolos; S. N. Liddick; M. Madurga; T. H. Ogunbeku; B. M. Sherrill; K. Siegl

doi:10.1016/j.physletb.2025.139576

The evidence of N = 16 shell closure and β-delayed neutron emission from ²⁵F

J. F. Peltier
, Z. Y. Xu
, I. Cox
, R. Grzywacz
, R. S. Lubna
, N. Kitamura
, S. Neupane
, J. M. Allmond
, J. Christie
, A. A. Doetsch
, P. Dyszel
, T. Gaballah
, T. T. King
, K. Kolos
, S. N. Liddick
, M. Madurga
, T. H. Ogunbeku
, B. M. Sherrill
, K. Siegl

Nuclear Structure and Nuclear Astrophysi

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

2 Scopus citations

Abstract

We measured the β-delayed neutron emission from ²⁵F for the first time at the Facility for Rare Isotope Beams (FRIB). Using combined neutron and γ-ray detector systems of the FRIB Decay Station Initiator (FDSi), we observed β-decay transitions populating neutron unbound states between 4.2 and 8 MeV in ²⁵Ne. The experimental results led to the revision of the β-decay half-life and β-delayed neutron-emission probability of ²⁵F. The β-decay strength distribution of ²⁵F extracted from the data agrees with the shell-model predictions using the USDB and SDPF-M effective interactions. This result indicates that the spherical neutron N=16 shell gap persists in ²⁵F and ²⁵Ne.

Original language	English
Article number	139576
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	866
DOIs	https://doi.org/10.1016/j.physletb.2025.139576
State	Published - Jul 2025

Funding

We would like to thank the entire operations team at FRIB for reliable beam delivery during the experiment. We would also like to thank Dr. Ben Kay, Dr. Kate Jones, Dr. Frédéric Nowacki, and Dr. Tsz Leung Tang for insightful discussions. This work is supported in part by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contracts No. DE-AC52-07NA27344 (LLNL), No. DE-AC05-00OR22725 (ORNL), No. DE-FG02-96ER40983 (UTK), No. DE-SC0020451 (MSU), Award No. DE-SC0020451 (FRIB), and used resources of the Facility for Rare Isotope Beams (FRIB) Operations, which is a DOE Office of Science User Facility under Award Number DE-SC0023633 . This work was also sponsored by the Stewardship Science Academic Alliances program through DOE Awards No. DE-NA0003899 (UTK) and No. DOE-DE-NA0003906 (MSU), NSF Major Research Instrumentation Program Award No. 1919735 (UTK), the US National Science Foundation under grants No. PHY-20-12040 (B.M.S) and PHY-1848177 (CAREER), the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number DE-NA0003996 , and the U.S. Department of Energy, National Nuclear Security Administration under award No. DE-NA0003180 (MSU).

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10.1016/j.physletb.2025.139576

Cite this

Peltier, J. F., Xu, Z. Y., Cox, I., Grzywacz, R., Lubna, R. S., Kitamura, N., Neupane, S., Allmond, J. M., Christie, J., Doetsch, A. A., Dyszel, P., Gaballah, T., King, T. T., Kolos, K., Liddick, S. N., Madurga, M., Ogunbeku, T. H., Sherrill, B. M., & Siegl, K. (2025). The evidence of N = 16 shell closure and β-delayed neutron emission from ²⁵F. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 866, Article 139576. https://doi.org/10.1016/j.physletb.2025.139576

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title = "The evidence of N = 16 shell closure and β-delayed neutron emission from 25F",

abstract = "We measured the β-delayed neutron emission from 25F for the first time at the Facility for Rare Isotope Beams (FRIB). Using combined neutron and γ-ray detector systems of the FRIB Decay Station Initiator (FDSi), we observed β-decay transitions populating neutron unbound states between 4.2 and 8 MeV in 25Ne. The experimental results led to the revision of the β-decay half-life and β-delayed neutron-emission probability of 25F. The β-decay strength distribution of 25F extracted from the data agrees with the shell-model predictions using the USDB and SDPF-M effective interactions. This result indicates that the spherical neutron N=16 shell gap persists in 25F and 25Ne.",

author = "Peltier, \{J. F.\} and Xu, \{Z. Y.\} and I. Cox and R. Grzywacz and Lubna, \{R. S.\} and N. Kitamura and S. Neupane and Allmond, \{J. M.\} and J. Christie and Doetsch, \{A. A.\} and P. Dyszel and T. Gaballah and King, \{T. T.\} and K. Kolos and Liddick, \{S. N.\} and M. Madurga and Ogunbeku, \{T. H.\} and Sherrill, \{B. M.\} and K. Siegl",

note = "Publisher Copyright: {\textcopyright} 2025 The Author(s)",

year = "2025",

month = jul,

doi = "10.1016/j.physletb.2025.139576",

language = "English",

volume = "866",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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Peltier, JF, Xu, ZY, Cox, I, Grzywacz, R, Lubna, RS, Kitamura, N, Neupane, S, Allmond, JM, Christie, J, Doetsch, AA, Dyszel, P, Gaballah, T, King, TT, Kolos, K, Liddick, SN, Madurga, M, Ogunbeku, TH, Sherrill, BM & Siegl, K 2025, 'The evidence of N = 16 shell closure and β-delayed neutron emission from ²⁵F', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 866, 139576. https://doi.org/10.1016/j.physletb.2025.139576

TY - JOUR

T1 - The evidence of N = 16 shell closure and β-delayed neutron emission from 25F

AU - Peltier, J. F.

AU - Xu, Z. Y.

AU - Cox, I.

AU - Grzywacz, R.

AU - Lubna, R. S.

AU - Kitamura, N.

AU - Neupane, S.

AU - Allmond, J. M.

AU - Christie, J.

AU - Doetsch, A. A.

AU - Dyszel, P.

AU - Gaballah, T.

AU - King, T. T.

AU - Kolos, K.

AU - Liddick, S. N.

AU - Madurga, M.

AU - Ogunbeku, T. H.

AU - Sherrill, B. M.

AU - Siegl, K.

PY - 2025/7

Y1 - 2025/7

N2 - We measured the β-delayed neutron emission from 25F for the first time at the Facility for Rare Isotope Beams (FRIB). Using combined neutron and γ-ray detector systems of the FRIB Decay Station Initiator (FDSi), we observed β-decay transitions populating neutron unbound states between 4.2 and 8 MeV in 25Ne. The experimental results led to the revision of the β-decay half-life and β-delayed neutron-emission probability of 25F. The β-decay strength distribution of 25F extracted from the data agrees with the shell-model predictions using the USDB and SDPF-M effective interactions. This result indicates that the spherical neutron N=16 shell gap persists in 25F and 25Ne.

AB - We measured the β-delayed neutron emission from 25F for the first time at the Facility for Rare Isotope Beams (FRIB). Using combined neutron and γ-ray detector systems of the FRIB Decay Station Initiator (FDSi), we observed β-decay transitions populating neutron unbound states between 4.2 and 8 MeV in 25Ne. The experimental results led to the revision of the β-decay half-life and β-delayed neutron-emission probability of 25F. The β-decay strength distribution of 25F extracted from the data agrees with the shell-model predictions using the USDB and SDPF-M effective interactions. This result indicates that the spherical neutron N=16 shell gap persists in 25F and 25Ne.

UR - https://www.scopus.com/pages/publications/105005506962

U2 - 10.1016/j.physletb.2025.139576

DO - 10.1016/j.physletb.2025.139576

M3 - Article

AN - SCOPUS:105005506962

SN - 0370-2693

VL - 866

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 139576

ER -

The evidence of N = 16 shell closure and β-delayed neutron emission from ²⁵F

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The evidence of N = 16 shell closure and β-delayed neutron emission from 25F

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The evidence of N = 16 shell closure and β-delayed neutron emission from ²⁵F