Coexisting normal and intruder configurations in 32Mg

Kitamura, N.; Wimmer, K.; Poves, A.; Shimizu, N.; Tostevin, J. A.; Bader, V. M.; Bancroft, C.; Barofsky, D.; Baugher, T.; Bazin, D.; Berryman, J. S.; Bildstein, V.; Gade, A.; Imai, N.; Kröll, T.; Langer, C.; Lloyd, J.; Lunderberg, E.; Nowacki, F.; Perdikakis, G.; Recchia, F.; Redpath, T.; Saenz, S.; Smalley, D.; Stroberg, S. R.; Utsuno, Y.; Weisshaar, D.; Westerberg, A.

doi:10.1016/j.physletb.2021.136682

Title: Coexisting normal and intruder configurations in ³²Mg

Journal Article · Mon Sep 27 00:00:00 EDT 2021 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2021.136682· OSTI ID:1824788

Kitamura, N. ^[1];

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

^[4];

^[5]; Bader, V. M. ^[6]; Bancroft, C. ^[7]; Barofsky, D. ^[7]; Baugher, T. ^[6]; Bazin, D. ^[6];

^[6];

^[8];

^[6]; Imai, N. ^[4];

^[9]; Langer, C. ^[6]; Lloyd, J. ^[7]; Lunderberg, E. ^[6]; Nowacki, F. ^[10]; Perdikakis, G. ^[11] more »

Univ. of Tokyo, Saitama (Japan); Univ. of Tennessee, Knoxville, TN (United States)
CSIC, Madrid (Spain); Univ. of Tokyo (Japan); Central Michigan Univ., Mount Pleasant, MI (United States); Michigan State Univ., East Lansing, MI (United States)
Univ. Autónoma de Madrid (Spain)
Univ. of Tokyo, Saitama (Japan)
Univ. of Surrey, Guildford (United Kingdom)
Michigan State Univ., East Lansing, MI (United States)
Central Michigan Univ., Mount Pleasant, MI (United States)
Univ. of Guelph, ON (Canada)
Technische Univ. Darmstadt (Germany)
Inst. Pluridisciplinaire Hubert Curien, Strasbourg (France)
Central Michigan Univ., Mount Pleasant, MI (United States); Michigan State Univ., East Lansing, MI (United States)
Japan Atomic Energy Agency (JAEA), Ibaraki (Japan); Univ. of Tokyo, Saitama (Japan)

Situated in the so-called “island of inversion,” the nucleus ³²Mg is considered as an archetypal example of the disappearance of magicity at N = 20. We report on high statistics in-beam spectroscopy of ³²Mg with a unique approach, in that two direct reaction probes with different sensitivities to the underlying nuclear structure are employed at the same time. More specifically, states in ³²Mg were populated by knockout reactions starting from ³³Mg and ³⁴Si, lying inside and outside the island of inversion, respectively. The momentum distributions of the reaction residues and the cross sections leading to the individual final states were confronted with eikonal-based reaction calculations, yielding a significantly updated level scheme for ³²Mg and spin-parity assignments. By fully exploiting observables obtained in this measurement, a variety of structures coexisting in ³²Mg was unraveled. Comparisons with theoretical predictions based on shell-model overlaps allowed for clear discrimination between different structural models, revealing that the complete theoretical description of this key nucleus is yet to be achieved.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Michigan State Univ., East Lansing, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)

Grant/Contract Number:: SC0020451; AC02-05CH11231; PHY-1306297

OSTI ID:: 1824788

Journal Information:: Physics Letters. B, Vol. 822; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (55)

Single-neutron knockout from intermediate energy beams of ${}^{30, 32}{Mg}$ : Mapping the transition into the “island of inversion” Terry, J. R.; Brown, B. A.; Campbell, C. M. Physical Review C, Vol. 77, Issue 1 https://doi.org/10.1103/PhysRevC.77.014316	journal	January 2008
Spin and Magnetic Moment of ${}^{33}{Mg}$ : Evidence for a Negative-Parity Intruder Ground State Yordanov, D. T.; Kowalska, M.; Blaum, K. Physical Review Letters, Vol. 99, Issue 21 https://doi.org/10.1103/PhysRevLett.99.212501	journal	November 2007
Large deformation of the very neutron-rich nucleus 32Mg from intermediate-energy Coulomb excitation Motobayashi, T.; Ikeda, Y.; Ieki, K. Physics Letters B, Vol. 346, Issue 1-2 https://doi.org/10.1016/0370-2693(95)00012-A	journal	March 1995
Multiparticle-multihole states in $^{31}$ Mg and $^{33}$ Mg: A critical evaluation Neyens, Gerda Physical Review C, Vol. 84, Issue 6 https://doi.org/10.1103/PhysRevC.84.064310	journal	December 2011
β decay of ${}^{32}{Na}$ Mattoon, C. M.; Sarazin, F.; Hackman, G. Physical Review C, Vol. 75, Issue 1 https://doi.org/10.1103/PhysRevC.75.017302	journal	January 2007
Two-neutron knockout as a probe of the composition of states in ${}^{22}{Mg}, {}^{23}{Al}$ , and ${}^{24}{Si}$ Longfellow, B.; Gade, A.; Tostevin, J. A. Physical Review C, Vol. 101, Issue 3 https://doi.org/10.1103/PhysRevC.101.031303	journal	March 2020
Re-examining the transition into the N = 20 island of inversion: Structure of 30 Mg Fernández-Domínguez, B.; Pietras, B.; Catford, W. N. Physics Letters B, Vol. 779 https://doi.org/10.1016/j.physletb.2018.02.002	journal	April 2018
Beta decay of ${}^{27 - 32}{Na}$ and their descendants Détraz, C.; Guillemaud, D.; Huber, G. Physical Review C, Vol. 19, Issue 1 https://doi.org/10.1103/PhysRevC.19.164	journal	January 1979
The ${}^{30}{Mg} (t, p) {}^{32}{Mg}$ “puzzle” reexamined Macchiavelli, A. O.; Crawford, H. L.; Campbell, C. M. Physical Review C, Vol. 94, Issue 5 https://doi.org/10.1103/PhysRevC.94.051303	journal	November 2016
Nuclear magic numbers: New features far from stability Sorlin, O.; Porquet, M. -G. Progress in Particle and Nuclear Physics, Vol. 61, Issue 2 https://doi.org/10.1016/j.ppnp.2008.05.001	journal	October 2008
Spectroscopy of ${}^{33}{Mg}$ with knockout reactions Bazin, D.; Aoi, N.; Baba, H. Physical Review C, Vol. 103, Issue 6 https://doi.org/10.1103/PhysRevC.103.064318	journal	June 2021
Evolution of Nuclear Shells due to the Tensor Force Otsuka, Takaharu; Suzuki, Toshio; Fujimoto, Rintaro Physical Review Letters, Vol. 95, Issue 23 https://doi.org/10.1103/PhysRevLett.95.232502	journal	November 2005
Island of inversion around ${}^{64}{Cr}$ Lenzi, S. M.; Nowacki, F.; Poves, A. Physical Review C, Vol. 82, Issue 5 https://doi.org/10.1103/PhysRevC.82.054301	journal	November 2010
Shape Coexistence in ${}^{78}{Ni}$ as the Portal to the Fifth Island of Inversion Nowacki, F.; Poves, A.; Caurier, E. Physical Review Letters, Vol. 117, Issue 27 https://doi.org/10.1103/PhysRevLett.117.272501	journal	December 2016
The S800 spectrograph Bazin, D.; Caggiano, J. A.; Sherrill, B. 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)02142-0	journal	May 2003
Varying shell gap and deformation in $N \sim 20$ unstable nuclei studied by the Monte Carlo shell model Utsuno, Yutaka; Otsuka, Takaharu; Mizusaki, Takahiro Physical Review C, Vol. 60, Issue 5 https://doi.org/10.1103/PhysRevC.60.054315	journal	October 1999
Two-Nucleon Knockout Spectroscopy at the Limits of Nuclear Stability Simpson, E. C.; Tostevin, J. A.; Bazin, D. Physical Review Letters, Vol. 102, Issue 13 https://doi.org/10.1103/PhysRevLett.102.132502	journal	April 2009
Excited intruder states in ${}^{32}{Mg}$ Tripathi, Vandana; Tabor, S. L.; Bender, P. Physical Review C, Vol. 77, Issue 3 https://doi.org/10.1103/PhysRevC.77.034310	journal	March 2008
The neutron-rich edge of the nuclear landscape: Experiment and theory. Nowacki, Frédéric; Obertelli, Alexandre; Poves, Alfredo Progress in Particle and Nuclear Physics, Vol. 120 https://doi.org/10.1016/j.ppnp.2021.103866	journal	September 2021
Structure of ${}^{30}{Mg}$ explored via in-beam $γ$ -ray spectroscopy Kitamura, N.; Wimmer, K.; Shimizu, N. Physical Review C, Vol. 102, Issue 5 https://doi.org/10.1103/PhysRevC.102.054318	journal	November 2020
Merging of the islands of inversion at $N = 20$ and $N = 28$ Caurier, E.; Nowacki, F.; Poves, A. Physical Review C, Vol. 90, Issue 1 https://doi.org/10.1103/PhysRevC.90.014302	journal	July 2014
Longitudinal momentum distributions of the reaction residues following fast two-nucleon knockout reactions Simpson, E. C.; Tostevin, J. A.; Bazin, D. Physical Review C, Vol. 79, Issue 6 https://doi.org/10.1103/PhysRevC.79.064621	journal	June 2009
In-beam nuclear spectroscopy of bound states with fast exotic ion beams Gade, A.; Glasmacher, T. Progress in Particle and Nuclear Physics, Vol. 60, Issue 1 https://doi.org/10.1016/j.ppnp.2007.08.001	journal	January 2008
Structure of 33Mg sheds new light on the <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>20</mml:mn></mml:math> island of inversion Kanungo, R.; Nociforo, C.; Prochazka, A. Physics Letters B, Vol. 685, Issue 4-5 https://doi.org/10.1016/j.physletb.2010.02.008	journal	March 2010
34Si: A new doubly magic nucleus? Baumann, P.; Huck, A.; Klotz, G. Physics Letters B, Vol. 228, Issue 4 https://doi.org/10.1016/0370-2693(89)90974-X	journal	September 1989
Experimental Study of the Two-Body Spin-Orbit Force in Nuclei Burgunder, G.; Sorlin, O.; Nowacki, F. Physical Review Letters, Vol. 112, Issue 4 https://doi.org/10.1103/PhysRevLett.112.042502	journal	January 2014
Shape coexistence in atomic nuclei Heyde, Kris; Wood, John L. Reviews of Modern Physics, Vol. 83, Issue 4 https://doi.org/10.1103/RevModPhys.83.1467	journal	November 2011
Systematics of intermediate-energy single-nucleon removal cross sections Tostevin, J. A.; Gade, A. Physical Review C, Vol. 90, Issue 5 https://doi.org/10.1103/PhysRevC.90.057602	journal	November 2014
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
Correlated two-nucleon stripping reactions Tostevin, J. A.; Podolyák, G.; Brown, B. A. Physical Review C, Vol. 70, Issue 6 https://doi.org/10.1103/PhysRevC.70.064602	journal	December 2004
The onset of deformation at the N = 20 neutron shell closure far from stability Poves, A.; Retamosa, J. Physics Letters B, Vol. 184, Issue 4 https://doi.org/10.1016/0370-2693(87)90171-7	journal	February 1987
Direct measurement of the masses of ${}^{11}{Li}$ and ${}^{26 - 32}{Na}$ with an on-line mass spectrometer Thibault, C.; Klapisch, R.; Rigaud, C. Physical Review C, Vol. 12, Issue 2 https://doi.org/10.1103/PhysRevC.12.644	journal	August 1975
Magic Numbers in Exotic Nuclei and Spin-Isospin Properties of the $NN$ Interaction Otsuka, Takaharu; Fujimoto, Rintaro; Utsuno, Yutaka Physical Review Letters, Vol. 87, Issue 8 https://doi.org/10.1103/PhysRevLett.87.082502	journal	August 2001
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
Structure of ${}^{33}{Si}$ and the magicity of the $N = 20$ gap at $Z = 14$ Jongile, S.; Lemasson, A.; Sorlin, O. Physical Review C, Vol. 102, Issue 2 https://doi.org/10.1103/PhysRevC.102.024321	journal	August 2020
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
Intruder features in the island of inversion: The case of $^{33} Mg$ Nummela, S.; Nowacki, F.; Baumann, P. Physical Review C, Vol. 64, Issue 5 https://doi.org/10.1103/PhysRevC.64.054313	journal	October 2001
Focal plane detector for the S800 high-resolution spectrometer Yurkon, J.; Bazin, D.; Benenson, W. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 422, Issue 1-3 https://doi.org/10.1016/S0168-9002(98)00960-7	journal	February 1999
Evolution of shell structure in exotic nuclei Otsuka, Takaharu; Gade, Alexandra; Sorlin, Olivier Reviews of Modern Physics, Vol. 92, Issue 1 https://doi.org/10.1103/RevModPhys.92.015002	journal	March 2020
Reduction of spectroscopic strength: Weakly-bound and strongly-bound single-particle states studied using one-nucleon knockout reactions Gade, A.; Adrich, P.; Bazin, D. Physical Review C, Vol. 77, Issue 4 https://doi.org/10.1103/PhysRevC.77.044306	journal	April 2008
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
GRETINA and Its Early Science Fallon, Paul; Gade, Alexandra; Lee, I-Yang Annual Review of Nuclear and Particle Science, Vol. 66, Issue 1 https://doi.org/10.1146/annurev-nucl-102115-044834	journal	October 2016
Shape Coexistence Near Neutron Number $N = 20$ : First Identification of the $E 0$ Decay from the Deformed First Excited $J^{π} = 0^{+}$ State in ${}^{30}{Mg}$ Schwerdtfeger, W.; Thirolf, P. G.; Wimmer, K. Physical Review Letters, Vol. 103, Issue 1 https://doi.org/10.1103/PhysRevLett.103.012501	journal	June 2009
Migration of Nuclear Shell Gaps Studied in the $d ({}^{24}{Ne}, p γ) {}^{25}{Ne}$ Reaction Catford, W. N.; Timis, C. N.; Lemmon, R. C. Physical Review Letters, Vol. 104, Issue 19 https://doi.org/10.1103/PhysRevLett.104.192501	journal	May 2010
New Direct Reaction: Two-Proton Knockout from Neutron-Rich Nuclei Bazin, D.; Brown, B. A.; Campbell, C. M. Physical Review Letters, Vol. 91, Issue 1 https://doi.org/10.1103/PhysRevLett.91.012501	journal	June 2003
Novel Features of Nuclear Forces and Shell Evolution in Exotic Nuclei Otsuka, Takaharu; Suzuki, Toshio; Honma, Michio Physical Review Letters, Vol. 104, Issue 1 https://doi.org/10.1103/PhysRevLett.104.012501	journal	January 2010
GRETINA: A gamma ray energy tracking array Lee, I. Y.; Clark, R. M.; Cromaz, M. Nuclear Physics A, Vol. 746 https://doi.org/10.1016/j.nuclphysa.2004.09.038	journal	December 2004
Triple configuration coexistence in ${}^{44}S$ Santiago-Gonzalez, D.; Wiedenhöver, I.; Abramkina, V. Physical Review C, Vol. 83, Issue 6 https://doi.org/10.1103/PhysRevC.83.061305	journal	June 2011
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 performance of the γ-ray tracking array GRETINA for γ-ray spectroscopy with fast beams of rare isotopes Weisshaar, D.; Bazin, D.; Bender, P. C. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 847 https://doi.org/10.1016/j.nima.2016.12.001	journal	March 2017
Unveiling the Intruder Deformed $0_{2}^{+}$ State in ${}^{34}{Si}$ Rotaru, F.; Negoita, F.; Grévy, S. Physical Review Letters, Vol. 109, Issue 9 https://doi.org/10.1103/PhysRevLett.109.092503	journal	August 2012
Normal and intruder configurations in ${}^{34}{Si}$ populated in the $β^{-}$ decay of ${}^{34}{Mg}$ and ${}^{34}{Al}$ Lică, R.; Rotaru, F.; Borge, M. J. G. Physical Review C, Vol. 100, Issue 3 https://doi.org/10.1103/PhysRevC.100.034306	journal	September 2019
UCGretina geant4 simulation of the GRETINA Gamma-Ray Energy Tracking Array Riley, L. A.; Weisshaar, D.; Crawford, H. L. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1003 https://doi.org/10.1016/j.nima.2021.165305	journal	July 2021
Rotational band structure in ${}^{32}{Mg}$ Crawford, H. L.; Fallon, P.; Macchiavelli, A. O. Physical Review C, Vol. 93, Issue 3 https://doi.org/10.1103/PhysRevC.93.031303	journal	March 2016
Discovery of the Shape Coexisting $0^{+}$ State in ${}^{32}{Mg}$ by a Two Neutron Transfer Reaction Wimmer, K.; Kröll, T.; Krücken, R. Physical Review Letters, Vol. 105, Issue 25 https://doi.org/10.1103/PhysRevLett.105.252501	journal	December 2010

Similar Records

In-beam γ-ray spectroscopy of ³²Mg via direct reactions

Journal Article · Wed Mar 16 00:00:00 EDT 2022 · Physical Review. C · OSTI ID:1824788

Kitamura, N.; Wimmer, K.; Miyagi, T.; +26 more

Structure of ³⁰Mg explored via in-beam γ-ray spectroscopy

Journal Article · Thu Nov 12 00:00:00 EST 2020 · Physical Review C · OSTI ID:1824788

Kitamura, N.; Wimmer, K.; Shimizu, N.; +24 more

Discovery of the Shape Coexisting 0{sup +} State in {sup 32}Mg by a Two Neutron Transfer Reaction

Journal Article · Fri Dec 17 00:00:00 EST 2010 · Physical Review Letters · OSTI ID:1824788

Wimmer, K; Kroell, T; Kruecken, R; +17 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
In-beam γ-ray spectroscopy
Island of inversion
Direct reactions
Radioactive beams
Shell model

Title: Coexisting normal and intruder configurations in 32Mg

Citation Formats

References (55)

Similar Records

Related Subjects

Title: Coexisting normal and intruder configurations in ³²Mg