Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB

H. L. Crawford; V. Tripathi; J. M. Allmond; B. P. Crider; R. Grzywacz; S. N. Liddick; A. Andalib; E. Argo; C. Benetti; S. Bhattacharya; C. M. Campbell; M. P. Carpenter; J. Chan; A. Chester; J. Christie; B. R. Clark; I. Cox; A. A. Doetsch; J. Dopfer; J. G. Duarte; P. Fallon; A. Frotscher; T. Gaballah; T. J. Gray; J. T. Harke; J. Heideman; H. Heugen; R. Jain; T. T. King; N. Kitamura; K. Kolos; F. G. Kondev; A. Laminack; B. Longfellow; R. S. Lubna; S. Luitel; M. Madurga; R. Mahajan; M. J. Mogannam; C. Morse; S. Neupane; A. Nowicki; T. H. Ogunbeku; W. J. Ong; C. Porzio; C. J. Prokop; B. C. Rasco; E. K. Ronning; E. Rubino; T. J. Ruland; K. P. Rykaczewski; L. Schaedig; D. Seweryniak; K. Siegl; M. Singh; S. L. Tabor; T. L. Tang; T. Wheeler; J. A. Winger; Z. Xu

doi:10.1103/PhysRevLett.129.212501

Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB

H. L. Crawford, V. Tripathi, J. M. Allmond, B. P. Crider, R. Grzywacz, S. N. Liddick, A. Andalib, E. Argo, C. Benetti, S. Bhattacharya, C. M. Campbell, M. P. Carpenter, J. Chan, A. Chester, J. Christie, B. R. Clark, I. Cox, A. A. Doetsch, J. Dopfer, J. G. DuarteP. Fallon, A. Frotscher, T. Gaballah, T. J. Gray, J. T. Harke, J. Heideman, H. Heugen, R. Jain, T. T. King, N. Kitamura, K. Kolos, F. G. Kondev, A. Laminack, B. Longfellow, R. S. Lubna, S. Luitel, M. Madurga, R. Mahajan, M. J. Mogannam, C. Morse, S. Neupane, A. Nowicki, T. H. Ogunbeku, W. J. Ong, C. Porzio, C. J. Prokop, B. C. Rasco, E. K. Ronning, E. Rubino, T. J. Ruland, K. P. Rykaczewski, L. Schaedig, D. Seweryniak, K. Siegl, M. Singh, S. L. Tabor, T. L. Tang, T. Wheeler, J. A. Winger, Z. Xu

Nuclear Structure and Nuclear Astrophysi

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

18 Scopus citations

Abstract

New half-lives for exotic isotopes approaching the neutron drip-line in the vicinity of N∼28 for Z=12-15 were measured at the Facility for Rare Isotope Beams (FRIB) with the FRIB decay station initiator. The first experimental results are compared to the latest quasiparticle random phase approximation and shell-model calculations. Overall, the measured half-lives are consistent with the available theoretical descriptions and suggest a well-developed region of deformation below Ca48 in the N=28 isotones. The erosion of the Z=14 subshell closure in Si is experimentally confirmed at N=28, and a reduction in the Mg38 half-life is observed as compared with its isotopic neighbors, which does not seem to be predicted well based on the decay energy and deformation trends. This highlights the need for both additional data in this very exotic region, and for more advanced theoretical efforts.

Original language	English
Article number	212501
Journal	Physical Review Letters
Volume	129
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.129.212501
State	Published - Nov 18 2022

Funding

We would like to thank the entire operations team at FRIB for their amazing work in beam delivery during the experiment, and for all of the work leading up to this measurement. This material is based upon work supported in part by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contracts No. DE-AC02-06CH11357 (ANL), No. DE-AC02-98CH10946 (BNL), No. DE-AC02-05CH11231 (LBNL), No. DE-AC52-07NA27344 (LLNL), No. DE-SC0020451 (Michigan State), No. DE-SC0014448 (Mississipi State), No. DE-AC05-00OR22725 (ORNL), and No. DE-FG02-96ER40983 (UTK). This work was also supported by the U.S. National Science Foundation under Grants No. PHY-2012522 (FSU) and No. PHY-1848177 (CAREER) (Mississippi State). The research was also sponsored by the U.S. Department of Energy, National Nuclear Security Administration under Award No. DE-NA0003180 (Michigan State) and the Stewardship Science Academic Alliances program through DOE Awards No. DE-NA0003899 (UTK) and No. DOE-DE-NA0003906 (Michigan State), and NSF Major Research Instrumentation Program Award No. 1919735 (UTK).

Funders	Funder number
National Science Foundation	PHY-2012522, 1919735
U.S. Department of Energy
Office of Science
National Nuclear Security Administration	DE-NA0003180, DE-NA0003899, DOE-DE-NA0003906
Nuclear Physics	DE-AC02-06CH11357
Argonne National Laboratory	DE-AC02-05CH11231, DE-AC02-98CH10946
Lawrence Livermore National Laboratory	DE-SC0020451, DE-AC05-00OR22725, DE-SC0014448
Oak Ridge National Laboratory	DE-FG02-96ER40983
Lawrence Berkeley National Laboratory	DE-AC52-07NA27344
Florida State University	PHY-1848177

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Crawford, H. L., Tripathi, V., Allmond, J. M., Crider, B. P., Grzywacz, R., Liddick, S. N., Andalib, A., Argo, E., Benetti, C., Bhattacharya, S., Campbell, C. M., Carpenter, M. P., Chan, J., Chester, A., Christie, J., Clark, B. R., Cox, I., Doetsch, A. A., Dopfer, J., ... Xu, Z. (2022). Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB. Physical Review Letters, 129(21), Article 212501. https://doi.org/10.1103/PhysRevLett.129.212501

@article{2d9da80cf50b4dbca3024a785354f19a,

title = "Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB",

abstract = "New half-lives for exotic isotopes approaching the neutron drip-line in the vicinity of N∼28 for Z=12-15 were measured at the Facility for Rare Isotope Beams (FRIB) with the FRIB decay station initiator. The first experimental results are compared to the latest quasiparticle random phase approximation and shell-model calculations. Overall, the measured half-lives are consistent with the available theoretical descriptions and suggest a well-developed region of deformation below Ca48 in the N=28 isotones. The erosion of the Z=14 subshell closure in Si is experimentally confirmed at N=28, and a reduction in the Mg38 half-life is observed as compared with its isotopic neighbors, which does not seem to be predicted well based on the decay energy and deformation trends. This highlights the need for both additional data in this very exotic region, and for more advanced theoretical efforts.",

author = "Crawford, {H. L.} and V. Tripathi and Allmond, {J. M.} and Crider, {B. P.} and R. Grzywacz and Liddick, {S. N.} and A. Andalib and E. Argo and C. Benetti and S. Bhattacharya and Campbell, {C. M.} and Carpenter, {M. P.} and J. Chan and A. Chester and J. Christie and Clark, {B. R.} and I. Cox and Doetsch, {A. A.} and J. Dopfer and Duarte, {J. G.} and P. Fallon and A. Frotscher and T. Gaballah and Gray, {T. J.} and Harke, {J. T.} and J. Heideman and H. Heugen and R. Jain and King, {T. T.} and N. Kitamura and K. Kolos and Kondev, {F. G.} and A. Laminack and B. Longfellow and Lubna, {R. S.} and S. Luitel and M. Madurga and R. Mahajan and Mogannam, {M. J.} and C. Morse and S. Neupane and A. Nowicki and Ogunbeku, {T. H.} and Ong, {W. J.} and C. Porzio and Prokop, {C. J.} and Rasco, {B. C.} and Ronning, {E. K.} and E. Rubino and Ruland, {T. J.} and Rykaczewski, {K. P.} and L. Schaedig and D. Seweryniak and K. Siegl and M. Singh and Tabor, {S. L.} and Tang, {T. L.} and T. Wheeler and Winger, {J. A.} and Z. Xu",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society. ",

year = "2022",

month = nov,

day = "18",

doi = "10.1103/PhysRevLett.129.212501",

language = "English",

volume = "129",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

}

Crawford, HL, Tripathi, V, Allmond, JM, Crider, BP, Grzywacz, R, Liddick, SN, Andalib, A, Argo, E, Benetti, C, Bhattacharya, S, Campbell, CM, Carpenter, MP, Chan, J, Chester, A, Christie, J, Clark, BR, Cox, I, Doetsch, AA, Dopfer, J, Duarte, JG, Fallon, P, Frotscher, A, Gaballah, T, Gray, TJ, Harke, JT, Heideman, J, Heugen, H, Jain, R, King, TT, Kitamura, N, Kolos, K, Kondev, FG, Laminack, A, Longfellow, B, Lubna, RS, Luitel, S, Madurga, M, Mahajan, R, Mogannam, MJ, Morse, C, Neupane, S, Nowicki, A, Ogunbeku, TH, Ong, WJ, Porzio, C, Prokop, CJ, Rasco, BC, Ronning, EK, Rubino, E, Ruland, TJ, Rykaczewski, KP, Schaedig, L, Seweryniak, D, Siegl, K, Singh, M, Tabor, SL, Tang, TL, Wheeler, T, Winger, JA & Xu, Z 2022, 'Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB', Physical Review Letters, vol. 129, no. 21, 212501. https://doi.org/10.1103/PhysRevLett.129.212501

TY - JOUR

T1 - Crossing N=28 Toward the Neutron Drip Line

T2 - First Measurement of Half-Lives at FRIB

AU - Crawford, H. L.

AU - Tripathi, V.

AU - Allmond, J. M.

AU - Crider, B. P.

AU - Grzywacz, R.

AU - Liddick, S. N.

AU - Andalib, A.

AU - Argo, E.

AU - Benetti, C.

AU - Bhattacharya, S.

AU - Campbell, C. M.

AU - Carpenter, M. P.

AU - Chan, J.

AU - Chester, A.

AU - Christie, J.

AU - Clark, B. R.

AU - Cox, I.

AU - Doetsch, A. A.

AU - Dopfer, J.

AU - Duarte, J. G.

AU - Fallon, P.

AU - Frotscher, A.

AU - Gaballah, T.

AU - Gray, T. J.

AU - Harke, J. T.

AU - Heideman, J.

AU - Heugen, H.

AU - Jain, R.

AU - King, T. T.

AU - Kitamura, N.

AU - Kolos, K.

AU - Kondev, F. G.

AU - Laminack, A.

AU - Longfellow, B.

AU - Lubna, R. S.

AU - Luitel, S.

AU - Madurga, M.

AU - Mahajan, R.

AU - Mogannam, M. J.

AU - Morse, C.

AU - Neupane, S.

AU - Nowicki, A.

AU - Ogunbeku, T. H.

AU - Ong, W. J.

AU - Porzio, C.

AU - Prokop, C. J.

AU - Rasco, B. C.

AU - Ronning, E. K.

AU - Rubino, E.

AU - Ruland, T. J.

AU - Rykaczewski, K. P.

AU - Schaedig, L.

AU - Seweryniak, D.

AU - Siegl, K.

AU - Singh, M.

AU - Tabor, S. L.

AU - Tang, T. L.

AU - Wheeler, T.

AU - Winger, J. A.

AU - Xu, Z.

PY - 2022/11/18

Y1 - 2022/11/18

N2 - New half-lives for exotic isotopes approaching the neutron drip-line in the vicinity of N∼28 for Z=12-15 were measured at the Facility for Rare Isotope Beams (FRIB) with the FRIB decay station initiator. The first experimental results are compared to the latest quasiparticle random phase approximation and shell-model calculations. Overall, the measured half-lives are consistent with the available theoretical descriptions and suggest a well-developed region of deformation below Ca48 in the N=28 isotones. The erosion of the Z=14 subshell closure in Si is experimentally confirmed at N=28, and a reduction in the Mg38 half-life is observed as compared with its isotopic neighbors, which does not seem to be predicted well based on the decay energy and deformation trends. This highlights the need for both additional data in this very exotic region, and for more advanced theoretical efforts.

AB - New half-lives for exotic isotopes approaching the neutron drip-line in the vicinity of N∼28 for Z=12-15 were measured at the Facility for Rare Isotope Beams (FRIB) with the FRIB decay station initiator. The first experimental results are compared to the latest quasiparticle random phase approximation and shell-model calculations. Overall, the measured half-lives are consistent with the available theoretical descriptions and suggest a well-developed region of deformation below Ca48 in the N=28 isotones. The erosion of the Z=14 subshell closure in Si is experimentally confirmed at N=28, and a reduction in the Mg38 half-life is observed as compared with its isotopic neighbors, which does not seem to be predicted well based on the decay energy and deformation trends. This highlights the need for both additional data in this very exotic region, and for more advanced theoretical efforts.

UR - http://www.scopus.com/inward/record.url?scp=85142930241&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.129.212501

DO - 10.1103/PhysRevLett.129.212501

M3 - Article

C2 - 36461950

AN - SCOPUS:85142930241

SN - 0031-9007

VL - 129

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 212501

ER -

Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB

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