Coulomb breakup of neutron-rich 29,30Na isotopes near the island of inversion

A. Rahaman; Ushasi Datta; T. Aumann; S. Beceiro-Novo; K. Boretzky; C. Caesar; B. V. Carlson; W. N. Catford; S. Chakraborty; M. Chartier; D. Cortina-Gil; G. De Angelis; P. Diaz Fernandez; H. Emling; O. Ershova; L. M. Fraile; H. Geissel; D. Gonzalez-Diaz; H. Johansson; B. Jonson; N. Kalantar-Nayestanaki; T. Kröll; R. Krücken; J. Kurcewicz; C. Langer; T. Le Bleis; Y. Leifels; J. Marganiec; G. Münzenberg; M. A. Najafi; T. Nilsson; C. Nociforo; V. Panin; S. Paschalis; R. Plag; R. Reifarth; M. V. Ricciardi; C. Rigollet; D. Rossi; C. Scheidenberger; H. Scheit; H. Simon; Y. Togano; S. Typel; V. Volkov; A. Wagner; F. Wamers; H. Weick; M. Weigand; J. S. Winfield; D. Yakorev; M. Zoric

doi:10.1088/1361-6471/aa594d

Coulomb breakup of neutron-rich ^29,30Na isotopes near the island of inversion

A. Rahaman, Ushasi Datta, T. Aumann, S. Beceiro-Novo, K. Boretzky, C. Caesar, B. V. Carlson, W. N. Catford, S. Chakraborty, M. Chartier, D. Cortina-Gil, G. De Angelis, P. Diaz Fernandez, H. Emling, O. Ershova, L. M. Fraile, H. Geissel, D. Gonzalez-Diaz, H. Johansson, B. JonsonN. Kalantar-Nayestanaki, T. Kröll, R. Krücken, J. Kurcewicz, C. Langer, T. Le Bleis, Y. Leifels, J. Marganiec, G. Münzenberg, M. A. Najafi, T. Nilsson, C. Nociforo, V. Panin, S. Paschalis, R. Plag, R. Reifarth, M. V. Ricciardi, C. Rigollet, D. Rossi, C. Scheidenberger, H. Scheit, H. Simon, Y. Togano, S. Typel, V. Volkov, A. Wagner, F. Wamers, H. Weick, M. Weigand, J. S. Winfield, D. Yakorev, M. Zoric

Physics

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

Abstract

First results are reported on the ground state configurations of the neutron-rich ^29,30Na isotopes, obtained via Coulomb dissociation (CD) measurements. The invariant mass spectra of these nuclei have been obtained through measurement of the four-momenta of all decay products after Coulomb excitation of those nuclei on a ²⁰⁸Pb target at energies of 400-430 MeV/nucleon using the FRS-ALADIN-LAND setup at GSI, Darmstadt. Integrated inclusive CD cross-sections (CD) of 89 (7) mb and 167 (13) mb for one neutron removal from ²⁹Na and ³⁰Na, respectively, have been extracted up to an excitation energy of 10 MeV. The major part of one neutron removal, CD cross-sections of those nuclei populate the core, in its ground state. A comparison with the direct breakup model, suggests the predominant occupation of the valence neutron in the ground state of ²⁹Na and ³⁰Na is the d-orbital with a small contribution from the s-orbital, which are coupled with the ground state of the core. One of the major components of the ground state configurations of these nuclei are ²⁸Na and ²⁹Na, respectively. The ground state spin and parity of these nuclei obtained from this experiment are in agreement with earlier reported values. The spectroscopic factors for the valence neutron occupying the s and d orbitals for these nuclei in the ground state have been extracted and reported for the first time. A comparison of the experimental findings with shell model calculation using the MCSM suggests a lower limit of around 4.3 MeV of the sd-pf shell gap in ³⁰Na.

Original language	English
Article number	045101
Number of pages	16
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	44
Issue number	4
DOIs	https://doi.org/10.1088/1361-6471/aa594d
Publication status	Published - 21 Feb 2017

Bibliographical note

Publisher Copyright:
© 2017 IOP Publishing Ltd.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Keywords

Coulomb breakup
ground state configuration
island of inversion
neutron-rich nulei
RIB
spectroscopic factor

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10.1088/1361-6471/aa594d

Cite this

Rahaman, A., Datta, U., Aumann, T., Beceiro-Novo, S., Boretzky, K., Caesar, C., Carlson, B. V., Catford, W. N., Chakraborty, S., Chartier, M., Cortina-Gil, D., Angelis, G. D., Fernandez, P. D., Emling, H., Ershova, O., Fraile, L. M., Geissel, H., Gonzalez-Diaz, D., Johansson, H., ... Zoric, M. (2017). Coulomb breakup of neutron-rich ^29,30Na isotopes near the island of inversion. Journal of Physics G: Nuclear and Particle Physics, 44(4), Article 045101. https://doi.org/10.1088/1361-6471/aa594d

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title = "Coulomb breakup of neutron-rich 29,30Na isotopes near the island of inversion",

abstract = "First results are reported on the ground state configurations of the neutron-rich 29,30Na isotopes, obtained via Coulomb dissociation (CD) measurements. The invariant mass spectra of these nuclei have been obtained through measurement of the four-momenta of all decay products after Coulomb excitation of those nuclei on a 208Pb target at energies of 400-430 MeV/nucleon using the FRS-ALADIN-LAND setup at GSI, Darmstadt. Integrated inclusive CD cross-sections (CD) of 89 (7) mb and 167 (13) mb for one neutron removal from 29Na and 30Na, respectively, have been extracted up to an excitation energy of 10 MeV. The major part of one neutron removal, CD cross-sections of those nuclei populate the core, in its ground state. A comparison with the direct breakup model, suggests the predominant occupation of the valence neutron in the ground state of 29Na and 30Na is the d-orbital with a small contribution from the s-orbital, which are coupled with the ground state of the core. One of the major components of the ground state configurations of these nuclei are 28Na and 29Na, respectively. The ground state spin and parity of these nuclei obtained from this experiment are in agreement with earlier reported values. The spectroscopic factors for the valence neutron occupying the s and d orbitals for these nuclei in the ground state have been extracted and reported for the first time. A comparison of the experimental findings with shell model calculation using the MCSM suggests a lower limit of around 4.3 MeV of the sd-pf shell gap in 30Na.",

keywords = "Coulomb breakup, ground state configuration, island of inversion, neutron-rich nulei, RIB, spectroscopic factor",

author = "A. Rahaman and Ushasi Datta and T. Aumann and S. Beceiro-Novo and K. Boretzky and C. Caesar and Carlson, {B. V.} and Catford, {W. N.} and S. Chakraborty and M. Chartier and D. Cortina-Gil and Angelis, {G. De} and Fernandez, {P. Diaz} and H. Emling and O. Ershova and Fraile, {L. M.} and H. Geissel and D. Gonzalez-Diaz and H. Johansson and B. Jonson and N. Kalantar-Nayestanaki and T. Kr{\"o}ll and R. Kr{\"u}cken and J. Kurcewicz and C. Langer and Bleis, {T. Le} and Y. Leifels and J. Marganiec and G. M{\"u}nzenberg and Najafi, {M. A.} and T. Nilsson and C. Nociforo and V. Panin and S. Paschalis and R. Plag and R. Reifarth and Ricciardi, {M. V.} and C. Rigollet and D. Rossi and C. Scheidenberger and H. Scheit and H. Simon and Y. Togano and S. Typel and V. Volkov and A. Wagner and F. Wamers and H. Weick and M. Weigand and Winfield, {J. S.} and D. Yakorev and M. Zoric",

year = "2017",

month = feb,

day = "21",

doi = "10.1088/1361-6471/aa594d",

language = "English",

volume = "44",

journal = "Journal of Physics G: Nuclear and Particle Physics",

issn = "0954-3899",

publisher = "IOP Publishing",

number = "4",

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Rahaman, A, Datta, U, Aumann, T, Beceiro-Novo, S, Boretzky, K, Caesar, C, Carlson, BV, Catford, WN, Chakraborty, S, Chartier, M, Cortina-Gil, D, Angelis, GD, Fernandez, PD, Emling, H, Ershova, O, Fraile, LM, Geissel, H, Gonzalez-Diaz, D, Johansson, H, Jonson, B, Kalantar-Nayestanaki, N, Kröll, T, Krücken, R, Kurcewicz, J, Langer, C, Bleis, TL, Leifels, Y, Marganiec, J, Münzenberg, G, Najafi, MA, Nilsson, T, Nociforo, C, Panin, V, Paschalis, S, Plag, R, Reifarth, R, Ricciardi, MV, Rigollet, C, Rossi, D, Scheidenberger, C, Scheit, H, Simon, H, Togano, Y, Typel, S, Volkov, V, Wagner, A, Wamers, F, Weick, H, Weigand, M, Winfield, JS, Yakorev, D & Zoric, M 2017, 'Coulomb breakup of neutron-rich ^29,30Na isotopes near the island of inversion', Journal of Physics G: Nuclear and Particle Physics, vol. 44, no. 4, 045101. https://doi.org/10.1088/1361-6471/aa594d

TY - JOUR

T1 - Coulomb breakup of neutron-rich 29,30Na isotopes near the island of inversion

AU - Rahaman, A.

AU - Datta, Ushasi

AU - Aumann, T.

AU - Beceiro-Novo, S.

AU - Boretzky, K.

AU - Caesar, C.

AU - Carlson, B. V.

AU - Catford, W. N.

AU - Chakraborty, S.

AU - Chartier, M.

AU - Cortina-Gil, D.

AU - Angelis, G. De

AU - Fernandez, P. Diaz

AU - Emling, H.

AU - Ershova, O.

AU - Fraile, L. M.

AU - Geissel, H.

AU - Gonzalez-Diaz, D.

AU - Johansson, H.

AU - Jonson, B.

AU - Kalantar-Nayestanaki, N.

AU - Kröll, T.

AU - Krücken, R.

AU - Kurcewicz, J.

AU - Langer, C.

AU - Bleis, T. Le

AU - Leifels, Y.

AU - Marganiec, J.

AU - Münzenberg, G.

AU - Najafi, M. A.

AU - Nilsson, T.

AU - Nociforo, C.

AU - Panin, V.

AU - Paschalis, S.

AU - Plag, R.

AU - Reifarth, R.

AU - Ricciardi, M. V.

AU - Rigollet, C.

AU - Rossi, D.

AU - Scheidenberger, C.

AU - Scheit, H.

AU - Simon, H.

AU - Togano, Y.

AU - Typel, S.

AU - Volkov, V.

AU - Wagner, A.

AU - Wamers, F.

AU - Weick, H.

AU - Weigand, M.

AU - Winfield, J. S.

AU - Yakorev, D.

AU - Zoric, M.

PY - 2017/2/21

Y1 - 2017/2/21

N2 - First results are reported on the ground state configurations of the neutron-rich 29,30Na isotopes, obtained via Coulomb dissociation (CD) measurements. The invariant mass spectra of these nuclei have been obtained through measurement of the four-momenta of all decay products after Coulomb excitation of those nuclei on a 208Pb target at energies of 400-430 MeV/nucleon using the FRS-ALADIN-LAND setup at GSI, Darmstadt. Integrated inclusive CD cross-sections (CD) of 89 (7) mb and 167 (13) mb for one neutron removal from 29Na and 30Na, respectively, have been extracted up to an excitation energy of 10 MeV. The major part of one neutron removal, CD cross-sections of those nuclei populate the core, in its ground state. A comparison with the direct breakup model, suggests the predominant occupation of the valence neutron in the ground state of 29Na and 30Na is the d-orbital with a small contribution from the s-orbital, which are coupled with the ground state of the core. One of the major components of the ground state configurations of these nuclei are 28Na and 29Na, respectively. The ground state spin and parity of these nuclei obtained from this experiment are in agreement with earlier reported values. The spectroscopic factors for the valence neutron occupying the s and d orbitals for these nuclei in the ground state have been extracted and reported for the first time. A comparison of the experimental findings with shell model calculation using the MCSM suggests a lower limit of around 4.3 MeV of the sd-pf shell gap in 30Na.

AB - First results are reported on the ground state configurations of the neutron-rich 29,30Na isotopes, obtained via Coulomb dissociation (CD) measurements. The invariant mass spectra of these nuclei have been obtained through measurement of the four-momenta of all decay products after Coulomb excitation of those nuclei on a 208Pb target at energies of 400-430 MeV/nucleon using the FRS-ALADIN-LAND setup at GSI, Darmstadt. Integrated inclusive CD cross-sections (CD) of 89 (7) mb and 167 (13) mb for one neutron removal from 29Na and 30Na, respectively, have been extracted up to an excitation energy of 10 MeV. The major part of one neutron removal, CD cross-sections of those nuclei populate the core, in its ground state. A comparison with the direct breakup model, suggests the predominant occupation of the valence neutron in the ground state of 29Na and 30Na is the d-orbital with a small contribution from the s-orbital, which are coupled with the ground state of the core. One of the major components of the ground state configurations of these nuclei are 28Na and 29Na, respectively. The ground state spin and parity of these nuclei obtained from this experiment are in agreement with earlier reported values. The spectroscopic factors for the valence neutron occupying the s and d orbitals for these nuclei in the ground state have been extracted and reported for the first time. A comparison of the experimental findings with shell model calculation using the MCSM suggests a lower limit of around 4.3 MeV of the sd-pf shell gap in 30Na.

KW - Coulomb breakup

KW - ground state configuration

KW - island of inversion

KW - neutron-rich nulei

KW - RIB

KW - spectroscopic factor

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U2 - 10.1088/1361-6471/aa594d

DO - 10.1088/1361-6471/aa594d

M3 - Article

AN - SCOPUS:85015801293

SN - 0954-3899

VL - 44

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 4

M1 - 045101

ER -