Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Abrupt structural transition in exotic molybdenum isotopes unveils an isospin-symmetric island of inversion

Journal Article · · Nature Communications
 [1];  [2];  [2];  [3];  [4];  [4];  [3];  [2];  [5];  [3];  [3];  [6];  [3];  [2];  [5];  [3];  [7];  [3];  [3];  [3] more »;  [3];  [3];  [5];  [3];  [3];  [2];  [8];  [9];  [2];  [3];  [6];  [3] « less
  1. Institute of Basic Science (IBS), Daejeon (Korea, Republic of); Univ. degli Studi di Padova (Italy); Katholieke Univ. Leuven (Belgium)
  2. Univ. degli Studi di Padova (Italy); Istituto Nazionale di Fisica Nucleare (INFN) (Italy)
  3. Michigan State Univ., East Lansing, MI (United States)
  4. University of Strasbourg (France)
  5. Istituto Nazionale di Fisica Nucleare (INFN) (Italy)
  6. University of York (United Kingdom)
  7. Univ. degli Studi di Padova (Italy); Istituto Nazionale di Fisica Nucleare (INFN) (Italy); Univ. of Sao Paulo (Brazil)
  8. Univ. degli Studi di Padova (Italy)
  9. Univ. Autonoma de Madrid (Spain)
+ Show Author Affiliations
Like electrons in atoms, protons and neutrons in nuclei occupy orbitals in a shell structure with energy gaps at magic numbers. Radioactive-beam experiments revealed the disappearance of magic numbers in some neutron-rich isotopes. In these nuclei, configurations involving particles excited across the shell gap gain correlation energy, becoming the ground state. Neutron-rich regions of the nuclear chart that exhibit this property are known as “Islands of Inversion”. Here we present the lifetime measurement of the first 2+ states in 84Mo (N = Z) and 86Mo (N = Z + 2) revealing an unexpected sharp structural change between them defining the edge of the region of deformation around 80Zr. Similarly to the neutron-rich N = 40 Island of Inversion near 64Cr where cross-shell excitations dominate, we identify this region as an Island of Inversion with symmetrical proton and neutron excitations that we term “Isospin-Symmetric Island of Inversion”. Three-nucleon forces are suggested to drive Mo isotope structural changes.
Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
FWO Research Foundation; Institute for Basic Science; National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC02-05CH11231; NA0003180; SC0019034; SC0020451; SC0023633
OSTI ID:
3015421
Alternate ID(s):
OSTI ID: 3009567
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 16; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (55)

The 8 particle - 8 hole rotational band in 16O journal December 1967
Pseudo LS coupling and pseudo SU3 coupling schemes journal December 1969
The S800 spectrograph journal May 2003
Geant4—a simulation toolkit
  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8
journal July 2003
Shell model description of isotope shifts in calcium journal December 2001
Nuclear Data Sheets for A = 84 journal November 2009
Nuclear Data Sheets for A = 86 journal February 2015
A simulation tool for Recoil Distance Method lifetime measurements at NSCL
  • Adrich, P.; Enderich, D.; Miller, D.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 598, Issue 2 https://doi.org/10.1016/j.nima.2008.09.055
journal January 2009
The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA
  • Paschalis, S.; Lee, I. Y.; Macchiavelli, A. O.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 709 https://doi.org/10.1016/j.nima.2013.01.009
journal May 2013
The TRIple PLunger for EXotic beams TRIPLEX for excited-state lifetime measurement studies on rare isotopes
  • Iwasaki, H.; Dewald, A.; Braunroth, T.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 806 https://doi.org/10.1016/j.nima.2015.09.091
journal January 2016
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
Collectivity in A ∼ 70 nuclei studied via lifetime measurements in 70Br and 68,70Se journal June 2014
Triple enhancement of quasi-SU(3) quadrupole collectivity in Strontium-Zirconium N ≈ Z isotopes journal June 2021
The neutron-rich edge of the nuclear landscape: Experiment and theory. journal September 2021
The role of three-nucleon potentials within the shell model: Past and present journal January 2024
Precision mass measurement of lightweight self-conjugate nucleus 80Zr journal November 2021
In-beam spectroscopy reveals competing nuclear shapes in the rare isotope 62Cr journal October 2024
Chiral three-body force and monopole properties of shell-model Hamiltonian journal January 2019
A study of the neutron-deficient isotope 66 Ge journal December 1979
Convergence and efficiency of angular momentum projection journal November 2018
Collective motion in the nuclear shell model. I. Classification schemes for states of mixed configurations journal May 1958
Collective motion in the nuclear shell model II. The introduction of intrinsic wave-functions journal July 1958
Effect of Woods-Saxon Wave Functions on the Calculation of A = 18 ,   2 0 6 ,   210 Spectra with a Realistic Interaction journal April 1969
Contribution of chiral three-body forces to the monopole component of the effective shell-model Hamiltonian journal September 2019
Intruder dominance in the 0 2 + state of Mg 32 studied with a novel technique for in-flight decays journal October 2019
Lifetime measurements probing collectivity in the ground-state band of Mg32 journal August 2021
Nuclear structure within a discrete nonorthogonal shell model approach: New frontiers journal May 2022
Structure of As83, As85, and As87 : From semimagicity to γ softness journal July 2022
Ab initio computations of strongly deformed nuclei near 80Zr journal July 2024
Mass systematics for A =29–44 nuclei: The deformed A ∼32 region journal March 1990
Collectivity in light zirconium isotopes: Evolution with neutron number and angular momentum journal December 1993
Spherical shell model description of rotational motion journal October 1995
Transition quadrupole moments in82Zr journal March 1997
Accurate charge-dependent nucleon-nucleon potential at fourth order of chiral perturbation theory journal October 2003
Shell-model phenomenology of low-momentum interactions journal December 2006
Shape evolution in self-conjugate nuclei, and the transitional nucleus Se 68 journal September 2009
New effective interaction for f 5 pg 9 -shell nuclei journal December 2009
Structure of even-even nuclei using a mapped collective Hamiltonian and the D1S Gogny interaction journal January 2010
Island of inversion around Cr 64 journal November 2010
Observation of mutually enhanced collectivity in self-conjugate 38 76 Sr 38 journal April 2012
Merging of the islands of inversion at N = 20 and N = 28 journal July 2014
Three-nucleon forces and spectroscopy of neutron-rich calcium isotopes journal August 2014
Nilsson-SU3 self-consistency in heavy N = Z nuclei journal August 2015
Shape Coexistence in Light Se Isotopes: Evidence for Oblate Shapes journal March 2008
Evolution of Collectivity in Kr 72 : Evidence for Rapid Shape Transition journal April 2014
Shape Coexistence in Ni 78 as the Portal to the Fifth Island of Inversion journal December 2016
Establishing the Maximum Collectivity in Highly Deformed N = Z Nuclei journal April 2020
Electric Monopole Transition from the Superdeformed Band in Ca40 journal June 2022
Structure of O 16 journal July 1968
Extreme Prolate Deformation in Light Strontium Isotopes journal August 1982
Three-Body Monopole Corrections to Realistic Interactions journal January 2003
Shape and Structure of N = Z Ge 64 : Electromagnetic Transition Rates from the Application of the Recoil Distance Method to a Knockout Reaction journal July 2007
The shell model as a unified view of nuclear structure journal June 2005
Evolution of shell structure in exotic nuclei journal March 2020
Lifetime measurement in 74Kr and 76Kr journal November 2005

Similar Records

Related Subjects

experimental nuclear physics
theoretical nuclear physics