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Valence $1s-0d$ proton vacancy of the $^{32}$Si ground state
/ Watwood, N (Argonne (main)) ; Hoffman, C R (Argonne (main)) ; Kay, B P (Argonne (main)) ; Tolstukhin, I A (Argonne (main)) ; Chen, J (SUSTech, Shenzhen) ; Tang, T L (Argonne (main)) ; Bazin, D (Michigan State U., East Lansing (main)) ; Ayyad, Y (U. Santiago de Compostela (main)) ; Beceiro-Novo, S (La Coruna U.) ; Freeman, S J (U. Manchester (main) ; CERN) et al.
The $^{32}$Si($^3$He,$d$)$^{33}$P reaction was studied in inverse kinematics at 6.3~MeV/$u$. [...]
arXiv:2510.05073.
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2025 - 9.
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Constraining explosive nucleosynthesis by indirect reaction methods at storage rings using unstable beams in batch mode
/ de Angelis, G (INFN, Legnaro) ; Recchia, F (U. Padua (main) ; INFN, Padua) ; Glorius, J (Darmstadt, GSI) ; Gerl, J (Darmstadt, GSI) ; Jurado, B (LP2I, Bordeaux) ; Tu, Xiao-Lin (Lanzhou, Inst. Modern Phys.) ; Lou, Jian-Ling (Lanzhou, Inst. Modern Phys.) ; Carollo, S (U. Padua (main) ; INFN, Padua) ; Berthelot, C (LP2I, Bordeaux) ; Watwood, N (Argonne (main)) et al.
Nuclear reaction studies on unstable isotopes can strongly help in improving our understanding of nucleosynthesis in stars. Indirect approaches to determining astrophysical reaction rates are increasingly common-place and undergoing continuous refinement. [...]
2025 - 6 p.
- Published in : Chin. Phys. 49 (2025) 094004
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Searching for particle-hole cluster bands in $^{8}$Be using the ISOLDE Solenoidal Spectrometer
/ Haverson, Kristian C Z (Sheffield Hallam U.) ; Smith, Robin (Sheffield Hallam U. ; Connecticut U. LNS Avery Point Groton) ; Gai, Moshe (Connecticut U. LNS Avery Point Groton) ; Hughes, Owen (Sheffield Hallam U.) ; Tindle, Olivia (Sheffield Hallam U.) ; Bishop, Jack (Birmingham U.) ; Brooks, Alexander D (Birmingham U.) ; Falezza, Filippo (Birmingham U.) ; Kokalova, Tzany (Birmingham U.) ; Pirrie, Stuart (Birmingham U.) et al.
The 7Be(d, p)8Be∗ reaction was measured in inverse kinematics at a beam energy of 11 MeV/u using the ISOLDE Solenoidal Spectrometer, in order to identify and characterise high-excitation states in 8Be. The spin-parities of many of the states in the 16−20 MeV region can be explained as being particle-hole excitations within a two-centre shell model. [...]
2024 - 7 p.
- Published in : EPJ Web Conf. 311 (2024) 00012
Fulltext: PDF;
In : The Fifth International Workshop on State of the Art in Nuclear Cluster Physics, Hvar, Croatia, 10-14 Jun 2024, pp.00012
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Quenching of single-particle strength inferred from nucleon-removal transfer reactions on $^{15}$C
/ Jiang, Y.C. (SUSTech, Shenzhen ; Beijing, Inst. Atomic Energy) ; Chen, J. (SUSTech, Shenzhen ; Argonne) ; Kay, B.P. (Argonne) ; Hoffman, C.R. (Argonne) ; Tang, T.L. (Argonne) ; Tolstukhin, I.A. (Argonne) ; Xie, M.R. (Lanzhou, Inst. Modern Phys. ; UCAS, Beijing) ; Li, J.G. (Lanzhou, Inst. Modern Phys. ; UCAS, Beijing) ; Michel, N. (Lanzhou, Inst. Modern Phys. ; UCAS, Beijing) ; Avila, M.L. (Argonne) et al.
The difference in the proton and neutron separation energies ($ΔS$) of the weakly bound $^{15}$C ground state is -19.86 MeV, an extreme value. Data from intermediate-energy heavy-ion induced (HI-induced) knockout reactions on nuclei spanning $-20\lesssimΔS\lesssim+20$ MeV, suggest that the degree to which single-particle strength is quenched, $R\mathrm{_{s}}$, has a negative correlation with $ΔS$, decreasing from unity around $-20$~MeV to around 0.2 at $+20$~MeV. [...]
arXiv:2506.03685.-
2025-08-05 - 8 p.
- Published in : Phys. Lett. B 868 (2025) 139789
Fulltext: 2506.03685 - PDF; document - PDF;
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Evolution of the nuclear spin-orbit splitting explored via the $^{32}$Si($d$,$p$)$^{33}$Si reaction using SOLARIS
/ Chen, J. (SUSTech, Shenzhen ; Argonne) ; Kay, B.P. (Argonne) ; Hoffman, C.R. (Argonne) ; Tang, T.L. (Argonne) ; Tolstukhin, I.A. (Argonne) ; Bazin, D. (Michigan State U.) ; Lubna, R.S. (Michigan State U.) ; Ayyad, Y. (Santiago de Compostela U., IGFAE) ; Beceiro-Novo, S. (Michigan State U.) ; Coombes, B.J. (Australian Natl. U., Canberra) et al.
The spin-orbit splitting between neutron 1$p$ orbitals at $^{33}$Si has been deduced using the single-neutron-adding ($d$,$p$) reaction in inverse kinematics with a beam of $^{32}$Si, a long-lived radioisotope. Reaction products were analyzed by the newly implemented SOLARIS spectrometer at the reaccelerated-beam facility at the National Superconducting Cyclotron Laboratory. [...]
arXiv:2404.05434.-
2024-04-29 - 10 p.
- Published in : Phys. Lett. B 853 (2024) 138678
Fulltext: Publication - PDF; 2404.05434 - PDF;
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Direct Determination of Fission-Barrier Heights Using Light-Ion Transfer in Inverse Kinematics
/ Bennett, S.A. (Manchester U.) ; Garrett, K. (Manchester U.) ; Sharp, D.K. (Manchester U.) ; Freeman, S.J. (Manchester U. ; CERN) ; Smith, A.G. (Manchester U.) ; Wright, T.J. (Manchester U.) ; Kay, B.P. (Argonne, PHY) ; Tang, T.L. (Argonne, PHY) ; Tolstukhin, I.A. (Argonne, PHY) ; Ayyad, Y. (Santiago de Compostela U., IGFAE) et al.
We demonstrate a new technique for obtaining fission data for nuclei away from $\beta$-stability. These types of data are pertinent to the astrophysical \textit{r-}process, crucial to a complete understanding of the origin of the heavy elements, and for developing a predictive model of fission. [...]
arXiv:2304.10281.-
2023-05-19 - 6 p.
- Published in : Phys. Rev. Lett. 130 (2023) 202501
Fulltext: Publication - PDF; 2304.10281 - PDF;
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Probing the quadrupole transition strength of $^{15}$C via deuteron inelastic scattering
/ Chen, J. (Argonne) ; Kay, B.P. (Argonne) ; Tang, T.L. (Argonne) ; Tolstukhin, I.A. (Argonne) ; Hoffman, C.R. (Argonne) ; Li, H. (Lanzhou, Inst. Modern Phys.) ; Yin, P. (Lanzhou, Inst. Modern Phys.) ; Zhao, X. (Lanzhou, Inst. Modern Phys.) ; Maris, P. (Iowa State U.) ; Vary, J.P. (Ames Lab) et al.
Deuteron elastic scattering from 15C and inelastic scattering reactions to the first excited state of 15C were studied using a radioactive beam of 15C in inverse kinematics. The scattered deuterons were measured using HELIOS. [...]
arXiv:2209.12252.-
2022-12-12 - 9 p.
- Published in : Phys. Rev. C 106 (2022) 064312
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Evolution of single-particle structure near the $N=20$ island of inversion
/ MacGregor, P T (Manchester U.) ; Sharp, D K (Manchester U.) ; Freeman, S J (Manchester U.) ; Hoffman, C R (Argonne, PHY) ; Kay, B P (Argonne, PHY) ; Tang, T L (Argonne, PHY) ; Gaffney, L P (Liverpool U. ; CERN) ; Baader, E F (CERN) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Butler, P A (Liverpool U.) et al.
The single-particle properties of $^{29}$Mg have been investigated via a measurement of the $^{28}$Mg(d,p) 29Mg reaction, in inverse kinematics, using the ISOLDE Solenoidal Spectrometer. The negative-parity intruder states from the f p shell have been identified and used to benchmark modern shell-model calculations. [...]
2021 - 7 p.
- Published in : Phys. Rev. C 104 (2021) L051301
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First Exploration of Neutron Shell Structure Below Lead and Beyond $\boldsymbol{N=126}$
/ Tang, T.L. (Argonne) ; Kay, B.P. (Argonne) ; Hoffman, C.R. (Argonne) ; Schiffer, J.P. (Argonne) ; Sharp, D.K. (Manchester U.) ; Gaffney, L.P. (CERN) ; Freeman, S.J. (Manchester U.) ; Mumpower, M.R. ; Arokiaraj, A. ; Baader, E.F. (CERN) et al.
The nuclei below lead but with more than 126 neutrons are crucial to an understanding of the astrophysical $r$-process in producing nuclei heavier than $A\sim190$. Despite their importance, the structure and properties of these nuclei remain experimentally untested as they are difficult to produce in nuclear reactions with stable beams. [...]
arXiv:2001.00976; LA-UR-19-30930.-
2020-02-14 - 7 p.
- Published in : Phys. Rev. Lett. 124 (2020) 062502
Fulltext: PDF; Fulltext from Publisher: PDF;
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