Probing the role of proton cross-shell excitations in Ni70 using nucleon knockout reactions

doi:10.1103/PhysRevC.100.034317

This content will become publicly available on September 18, 2020

Title: Probing the role of proton cross-shell excitations in ${}^{70}{Ni}$ using nucleon knockout reactions

Abstract

The neutron-rich Ni isotopes have attracted attention in recent years because of the occurrence of shape or configuration coexistence. In this work, we discuss the difference in population of excited final states in ⁷⁰Ni following γ-ray tagged one-proton, one-neutron, and two-proton knockout from ⁷¹Cu, ⁷¹Ni, and ⁷²Zn rare-isotope beams, respectively. Using variations observed in the relative transition intensities, signaling the changed population of specific final states in the different reactions, the role of neutron and proton configurations in excited states of ⁷⁰Ni is probed schematically, with the goal of identifying those that carry, as leading configuration, proton excitations across the Z = 28 shell closure. Such states are implied in the literature to form a collective structure associated with prolate deformation. Adding to the body of knowledge for ⁷⁰Ni, 29 new transitions are reported, of which 15 are placed in its level scheme.

Authors:

Elman, B. ^[1];

^[1]; Janssens, R. V. F. ^[2]; Ayangeakaa, A. D. ^[3]; Bazin, D. ^[1]; Belarge, J. ^[1]; Bender, P. C. ^[4]; Brown, B. A. ^[1]; Campbell, C. M. ^[5]; Carpenter, M. P. ^[6]; Crawford, H. L. ^[5]; Crider, B. P. ^[7]; Fallon, P. ^[5]; Forney, A. M. ^[8]; Harker, J. ^[9]; Liddick, S. N. ^[1]; Longfellow, B. ^[1]; Lunderberg, E. ^[1]; Prokop, C. J. ^[1]; Sethi, J. ^[8] more »

Michigan State Univ., East Lansing, MI (United States)
Univ. of North Carolina, Chapel Hill, NC (United States)
United States Naval Academy, Annapolis, MD (United States)
Michigan State Univ., East Lansing, MI (United States); Univ. of Massachusetts, Lowell, MA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Michigan State Univ., East Lansing, MI (United States); Mississippi State Univ., Mississippi State, MS (United States)
Univ. of Maryland, College Park, MD (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Tokyo (Japan); RIKEN, Saitama (Japan); Univ. of York (United Kingdom)
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Publication Date:: 2019-09-18

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

OSTI Identifier:: 1574952

Alternate Identifier(s):: OSTI ID: 1562567

Grant/Contract Number:: AC02-06CH11357; FG02-94ER40834; FG02-08ER41556; FG02-97ER41041; FG02-97ER41033; NA0003180; SC0014537; AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 100; Journal Issue: 3; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Elman, B., Gade, A., Janssens, R. V.  F., Ayangeakaa, A. D., Bazin, D., Belarge, J., Bender, P. C., Brown, B. A., Campbell, C. M., Carpenter, M. P., Crawford, H. L., Crider, B. P., Fallon, P., Forney, A. M., Harker, J., Liddick, S. N., Longfellow, B., Lunderberg, E., Prokop, C. J., Sethi, J., Taniuchi, R., Walters, W. B., Weisshaar, D., and Zhu, S. Probing the role of proton cross-shell excitations in Ni70 using nucleon knockout reactions.  United States: N. p., 2019. 
        Web.  doi:10.1103/PhysRevC.100.034317.

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                    Elman, B., Gade, A., Janssens, R. V.  F., Ayangeakaa, A. D., Bazin, D., Belarge, J., Bender, P. C., Brown, B. A., Campbell, C. M., Carpenter, M. P., Crawford, H. L., Crider, B. P., Fallon, P., Forney, A. M., Harker, J., Liddick, S. N., Longfellow, B., Lunderberg, E., Prokop, C. J., Sethi, J., Taniuchi, R., Walters, W. B., Weisshaar, D., & Zhu, S. Probing the role of proton cross-shell excitations in Ni70 using nucleon knockout reactions.  United States.  doi:10.1103/PhysRevC.100.034317.

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                    Elman, B., Gade, A., Janssens, R. V.  F., Ayangeakaa, A. D., Bazin, D., Belarge, J., Bender, P. C., Brown, B. A., Campbell, C. M., Carpenter, M. P., Crawford, H. L., Crider, B. P., Fallon, P., Forney, A. M., Harker, J., Liddick, S. N., Longfellow, B., Lunderberg, E., Prokop, C. J., Sethi, J., Taniuchi, R., Walters, W. B., Weisshaar, D., and Zhu, S. Wed .  
        "Probing the role of proton cross-shell excitations in Ni70 using nucleon knockout reactions".  United States.  doi:10.1103/PhysRevC.100.034317.

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@article{osti_1574952,

  title        = {Probing the role of proton cross-shell excitations in Ni70 using nucleon knockout reactions},

  author       = {Elman, B. and Gade, A. and Janssens, R. V.  F. and Ayangeakaa, A. D. and Bazin, D. and Belarge, J. and Bender, P. C. and Brown, B. A. and Campbell, C. M. and Carpenter, M. P. and Crawford, H. L. and Crider, B. P. and Fallon, P. and Forney, A. M. and Harker, J. and Liddick, S. N. and Longfellow, B. and Lunderberg, E. and Prokop, C. J. and Sethi, J. and Taniuchi, R. and Walters, W. B. and Weisshaar, D. and Zhu, S.},

  abstractNote = {The neutron-rich Ni isotopes have attracted attention in recent years because of the occurrence of shape or configuration coexistence. In this work, we discuss the difference in population of excited final states in 70Ni following γ-ray tagged one-proton, one-neutron, and two-proton knockout from 71Cu, 71Ni, and 72Zn rare-isotope beams, respectively. Using variations observed in the relative transition intensities, signaling the changed population of specific final states in the different reactions, the role of neutron and proton configurations in excited states of 70Ni is probed schematically, with the goal of identifying those that carry, as leading configuration, proton excitations across the Z = 28 shell closure. Such states are implied in the literature to form a collective structure associated with prolate deformation. Adding to the body of knowledge for 70Ni, 29 new transitions are reported, of which 15 are placed in its level scheme.},

  doi          = {10.1103/PhysRevC.100.034317},

  journal      = {Physical Review C},

  number       = 3,

  volume       = 100,

  place        = {United States},

  year         = {2019},

  month        = {9}

}

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Works referenced in this record:

Identification of the New Neutron-Rich Isotopes ^70-74 Ni and ^74-77 Cu in Thermal Neutron Fission of ²³⁵ U
journal, October 1987

Armbruster, P.; Bernas, M.; Bocquet, J. P.
Europhysics Letters (EPL), Vol. 4, Issue 7
DOI: 10.1209/0295-5075/4/7/006

Novel shape evolution in exotic Ni isotopes and configuration-dependent shell structure
journal, March 2014

Tsunoda, Yusuke; Otsuka, Takaharu; Shimizu, Noritaka
Physical Review C, Vol. 89, Issue 3
DOI: 10.1103/PhysRevC.89.031301

Identification of deformed intruder states in semi-magic ${}^{70}{Ni}$
journal, April 2015

Chiara, C. J.; Weisshaar, D.; Janssens, R. V. F.
Physical Review C, Vol. 91, Issue 4
DOI: 10.1103/PhysRevC.91.044309

Shape coexistence from lifetime and branching-ratio measurements in 68,70 Ni
journal, December 2016

Crider, B. P.; Prokop, C. J.; Liddick, S. N.
Physics Letters B, Vol. 763
DOI: 10.1016/j.physletb.2016.10.020

Type II shell evolution in A = 70 isobars from the N ≥ 40 island of inversion
journal, February 2017

Morales, A. I.; Benzoni, G.; Watanabe, H.
Physics Letters B, Vol. 765
DOI: 10.1016/j.physletb.2016.12.025

New low-energy $0^{+}$ state and shape coexistence in ${}^{70}{Ni}$
journal, December 2015

Prokop, C. J.; Crider, B. P.; Liddick, S. N.
Physical Review C, Vol. 92, Issue 6
DOI: 10.1103/PhysRevC.92.061302

Low-lying dipole response in the unstable ${}^{70}{Ni}$ nucleus
journal, December 2018

Wieland, O.; Bracco, A.; Camera, F.
Physical Review C, Vol. 98, Issue 6
DOI: 10.1103/PhysRevC.98.064313

r -Process Nucleosynthesis in Hot Accretion Disk Flows from Black Hole-Neutron Star Mergers
journal, May 2008

Surman, R.; McLaughlin, G. C.; Ruffert, M.
The Astrophysical Journal, Vol. 679, Issue 2
DOI: 10.1086/589507

Experimental Neutron Capture Rate Constraint Far from Stability
journal, June 2016

Liddick, S. N.; Spyrou, A.; Crider, B. P.
Physical Review Letters, Vol. 116, Issue 24
DOI: 10.1103/PhysRevLett.116.242502

Strong Neutron- $γ$ Competition above the Neutron Threshold in the Decay of ${}^{70}{Co}$
journal, September 2016

Spyrou, A.; Liddick, S. N.; Naqvi, F.
Physical Review Letters, Vol. 117, Issue 14
DOI: 10.1103/PhysRevLett.117.142701

Enhanced low-energy $γ -decay$ strength of ${}^{70}{Ni}$ and its robustness within the shell model
journal, May 2018

Larsen, A. C.; Midtbø, J. E.; Guttormsen, M.
Physical Review C, Vol. 97, Issue 5
DOI: 10.1103/PhysRevC.97.054329

Shape coexistence in ${}^{68}{Ni}$
journal, February 2014

Suchyta, S.; Liddick, S. N.; Tsunoda, Y.
Physical Review C, Vol. 89, Issue 2
DOI: 10.1103/PhysRevC.89.021301

Multifaceted Quadruplet of Low-Lying Spin-Zero States in ${}^{66}{Ni}$ : Emergence of Shape Isomerism in Light Nuclei
journal, April 2017

Leoni, S.; Fornal, B.; Mărginean, N.
Physical Review Letters, Vol. 118, Issue 16
DOI: 10.1103/PhysRevLett.118.162502

Shape Coexistence in ${}^{78}{Ni}$ as the Portal to the Fifth Island of Inversion
journal, December 2016

Nowacki, F.; Poves, A.; Caurier, E.
Physical Review Letters, Vol. 117, Issue 27
DOI: 10.1103/PhysRevLett.117.272501

78Ni revealed as a doubly magic stronghold against nuclear deformation
journal, May 2019

Taniuchi, R.; Santamaria, C.; Doornenbal, P.
Nature, Vol. 569, Issue 7754
DOI: 10.1038/s41586-019-1155-x

Shape coexistence in neutron-rich nuclei
journal, January 2016

Gade, A.; Liddick, S. N.
Journal of Physics G: Nuclear and Particle Physics, Vol. 43, Issue 2
DOI: 10.1088/0954-3899/43/2/024001

Shape isomerism at $N = 40$ : Discovery of a proton intruder state in ${}^{67}{Co}$
journal, October 2008

Pauwels, D.; Ivanov, O.; Bree, N.
Physical Review C, Vol. 78, Issue 4
DOI: 10.1103/PhysRevC.78.041307

Cross-shell excitation in two-proton knockout: Structure of ${}^{52}{Ca}$
journal, August 2006

Gade, A.; Janssens, R. V. F.; Bazin, D.
Physical Review C, Vol. 74, Issue 2
DOI: 10.1103/PhysRevC.74.021302

Study of excited states in $^{208}$ Pb by particle- $γ$ coincidences with the $^{207} Pb {(d, p)}^{208} Pb$ and $^{209} Bi (t, α)^{208} Pb$ reactions
journal, September 1997

Schramm, M.; Maier, K. H.; Rejmund, M.
Physical Review C, Vol. 56, Issue 3
DOI: 10.1103/PhysRevC.56.1320

Competing particle–hole excitations in 30Na: Constraining state-of-the-art effective interactions
journal, September 2015

Petri, M.; Fallon, P.; Macchiavelli, A. O.
Physics Letters B, Vol. 748
DOI: 10.1016/j.physletb.2015.06.067

Single-particle structure at $N = 29$ : The structure of ${}^{47}{Ar}$ and first spectroscopy of ${}^{45}S$
journal, May 2016

Gade, A.; Tostevin, J. A.; Bader, V.
Physical Review C, Vol. 93, Issue 5
DOI: 10.1103/PhysRevC.93.054315

NSCL and FRIB at Michigan State University: Nuclear science at the limits of stability
journal, April 2016

Gade, A.; Sherrill, B. M.
Physica Scripta, Vol. 91, Issue 5
DOI: 10.1088/0031-8949/91/5/053003

Commissioning the A1900 projectile fragment separator
journal, May 2003

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
DOI: 10.1016/S0168-583X(02)01895-5

The S800 spectrograph
journal, May 2003

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
DOI: 10.1016/S0168-583X(02)02142-0

Focal plane detector for the S800 high-resolution spectrometer
journal, February 1999

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
DOI: 10.1016/S0168-9002(98)00960-7

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA
journal, May 2013

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
DOI: 10.1016/j.nima.2013.01.009

The performance of the γ-ray tracking array GRETINA for γ-ray spectroscopy with fast beams of rare isotopes
journal, March 2017

Weisshaar, D.; Bazin, D.; Bender, P. C.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 847
DOI: 10.1016/j.nima.2016.12.001

New CsI(Na) hodoscope array for the S800 spectrograph at NSCL
journal, October 2011

Meierbachtol, K.; Bazin, D.; Morrissey, D. J.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 652, Issue 1
DOI: 10.1016/j.nima.2010.10.053

IsoTagger: Identification of isomeric nuclear states produced in fragmentation reactions with radioactive beams
journal, January 2015

Wimmer, K.; Barofsky, D.; Bazin, D.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 769
DOI: 10.1016/j.nima.2014.09.081

Evidence for a $β$ -decaying $1 / 2^{-}$ isomer in ${}^{71}{Ni}$
journal, April 2009

Stefanescu, I.; Pauwels, D.; Bree, N.
Physical Review C, Vol. 79, Issue 4
DOI: 10.1103/PhysRevC.79.044325

D IRECT R EACTIONS WITH E XOTIC N UCLEI
journal, December 2003

Hansen, P. G.; Tostevin, J. A.
Annual Review of Nuclear and Particle Science, Vol. 53, Issue 1
DOI: 10.1146/annurev.nucl.53.041002.110406

Neutron single-particle strengths at $N = 40$ , 42: Neutron knockout from ${}^{68, 70}{Ni}$ ground and isomeric states
journal, November 2016

Recchia, F.; Weisshaar, D.; Gade, A.
Physical Review C, Vol. 94, Issue 5
DOI: 10.1103/PhysRevC.94.054324

In-beam nuclear spectroscopy of bound states with fast exotic ion beams
journal, January 2008

Gade, A.; Glasmacher, T.
Progress in Particle and Nuclear Physics, Vol. 60, Issue 1
DOI: 10.1016/j.ppnp.2007.08.001

Lifetime measurement of the $4_{1}^{+}$ state of ${}^{58}{Ni}$ with the recoil distance method
journal, August 2016

Loelius, C.; Iwasaki, H.; Brown, B. A.
Physical Review C, Vol. 94, Issue 2
DOI: 10.1103/PhysRevC.94.024340

Proton separation energies derived from the (d, 3He) reaction on f-p shell nuclei at 52 MeV
journal, September 1969

Mairle, G.; Kaschl, G. Th.; Link, H.
Nuclear Physics A, Vol. 134, Issue 1
DOI: 10.1016/0375-9474(69)90691-5

Low energy levels in ${}^{72}{Ni}$
journal, October 2003

Sawicka, M.; Grzywacz, R.; Matea, I.
Physical Review C, Vol. 68, Issue 4
DOI: 10.1103/PhysRevC.68.044304

$β$ decay of $^{66} Co,$ $^{68} Co,$ and $^{70} Co$
journal, April 2000

Mueller, W. F.; Bruyneel, B.; Franchoo, S.
Physical Review C, Vol. 61, Issue 5
DOI: 10.1103/PhysRevC.61.054308

Coupling of valence particles/holes to 68,70Ni studied via measurements of the B(E2) strength in 67,69,70Ni and 71Cu
journal, May 2003

Mach, H.; Lewitowicz, M.; Stanoiu, M.
Nuclear Physics A, Vol. 719
DOI: 10.1016/S0375-9474(03)00920-5

Structure of ${}^{70}{Fe}$ : Single-particle and collective degrees of freedom
journal, January 2019

Gade, A.; Janssens, R. V. F.; Tostevin, J. A.
Physical Review C, Vol. 99, Issue 1
DOI: 10.1103/PhysRevC.99.011301

New $T = 1$ effective interactions for the $f_{5 ∕ 2} p_{3 ∕ 2} p_{1 ∕ 2} g_{9 ∕ 2}$ model space: Implications for valence-mirror symmetry and seniority isomers
journal, October 2004

Lisetskiy, A. F.; Brown, B. A.; Horoi, M.
Physical Review C, Vol. 70, Issue 4
DOI: 10.1103/PhysRevC.70.044314

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Similar Records

This content will become publicly available on September 18, 2020

Title: Probing the role of proton cross-shell excitations in Ni 70 using nucleon knockout reactions

Abstract

Citation Formats

Identification of the New Neutron-Rich Isotopes 70-74 Ni and 74-77 Cu in Thermal Neutron Fission of 235 U journal, October 1987

Novel shape evolution in exotic Ni isotopes and configuration-dependent shell structure journal, March 2014

Identification of deformed intruder states in semi-magic Ni 70 journal, April 2015

Shape coexistence from lifetime and branching-ratio measurements in 68,70 Ni journal, December 2016

Type II shell evolution in A = 70 isobars from the N ≥ 40 island of inversion journal, February 2017

New low-energy 0 + state and shape coexistence in Ni 70 journal, December 2015

Low-lying dipole response in the unstable Ni 70 nucleus journal, December 2018

r -Process Nucleosynthesis in Hot Accretion Disk Flows from Black Hole-Neutron Star Mergers journal, May 2008

Experimental Neutron Capture Rate Constraint Far from Stability journal, June 2016

Strong Neutron- γ Competition above the Neutron Threshold in the Decay of Co 70 journal, September 2016

Enhanced low-energy γ -decay strength of Ni 70 and its robustness within the shell model journal, May 2018

Shape coexistence in Ni 68 journal, February 2014

Multifaceted Quadruplet of Low-Lying Spin-Zero States in Ni 66 : Emergence of Shape Isomerism in Light Nuclei journal, April 2017

Shape Coexistence in Ni 78 as the Portal to the Fifth Island of Inversion journal, December 2016

78Ni revealed as a doubly magic stronghold against nuclear deformation journal, May 2019

Shape coexistence in neutron-rich nuclei journal, January 2016

Shape isomerism at N = 40 : Discovery of a proton intruder state in Co 67 journal, October 2008

Cross-shell excitation in two-proton knockout: Structure of Ca 52 journal, August 2006

Study of excited states in 208 Pb by particle- γ coincidences with the 207 Pb ( d , p ) 208 Pb and 209 Bi ( t , α ) 208 Pb reactions journal, September 1997

Competing particle–hole excitations in 30Na: Constraining state-of-the-art effective interactions journal, September 2015

Single-particle structure at N = 29 : The structure of Ar 47 and first spectroscopy of S 45 journal, May 2016

NSCL and FRIB at Michigan State University: Nuclear science at the limits of stability journal, April 2016

Commissioning the A1900 projectile fragment separator journal, May 2003

The S800 spectrograph journal, May 2003

Focal plane detector for the S800 high-resolution spectrometer journal, February 1999

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA journal, May 2013

The performance of the γ-ray tracking array GRETINA for γ-ray spectroscopy with fast beams of rare isotopes journal, March 2017

New CsI(Na) hodoscope array for the S800 spectrograph at NSCL journal, October 2011

IsoTagger: Identification of isomeric nuclear states produced in fragmentation reactions with radioactive beams journal, January 2015

Evidence for a β -decaying 1 / 2 − isomer in Ni 71 journal, April 2009

D IRECT R EACTIONS WITH E XOTIC N UCLEI journal, December 2003

Neutron single-particle strengths at N = 40 , 42: Neutron knockout from Ni 68 , 70 ground and isomeric states journal, November 2016

In-beam nuclear spectroscopy of bound states with fast exotic ion beams journal, January 2008

Lifetime measurement of the 4 1 + state of Ni 58 with the recoil distance method journal, August 2016

Proton separation energies derived from the (d, 3He) reaction on f-p shell nuclei at 52 MeV journal, September 1969

Low energy levels in Ni 72 journal, October 2003

β decay of 66 Co , 68 Co , and 70 Co journal, April 2000

Coupling of valence particles/holes to 68,70Ni studied via measurements of the B(E2) strength in 67,69,70Ni and 71Cu journal, May 2003

Structure of Fe 70 : Single-particle and collective degrees of freedom journal, January 2019

New T = 1 effective interactions for the f 5 ∕ 2 p 3 ∕ 2 p 1 ∕ 2 g 9 ∕ 2 model space: Implications for valence-mirror symmetry and seniority isomers journal, October 2004

Title: Probing the role of proton cross-shell excitations in ${}^{70}{Ni}$ using nucleon knockout reactions

Identification of the New Neutron-Rich Isotopes ^70-74 Ni and ^74-77 Cu in Thermal Neutron Fission of ²³⁵ U
journal, October 1987

Novel shape evolution in exotic Ni isotopes and configuration-dependent shell structure
journal, March 2014

Identification of deformed intruder states in semi-magic ${}^{70}{Ni}$
journal, April 2015

Shape coexistence from lifetime and branching-ratio measurements in 68,70 Ni
journal, December 2016

Type II shell evolution in A = 70 isobars from the N ≥ 40 island of inversion
journal, February 2017

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journal, December 2015

Low-lying dipole response in the unstable ${}^{70}{Ni}$ nucleus
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journal, May 2008

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journal, June 2016

Strong Neutron- $γ$ Competition above the Neutron Threshold in the Decay of ${}^{70}{Co}$
journal, September 2016

Enhanced low-energy $γ -decay$ strength of ${}^{70}{Ni}$ and its robustness within the shell model
journal, May 2018

Shape coexistence in ${}^{68}{Ni}$
journal, February 2014

Multifaceted Quadruplet of Low-Lying Spin-Zero States in ${}^{66}{Ni}$ : Emergence of Shape Isomerism in Light Nuclei
journal, April 2017

Shape Coexistence in ${}^{78}{Ni}$ as the Portal to the Fifth Island of Inversion
journal, December 2016

78Ni revealed as a doubly magic stronghold against nuclear deformation
journal, May 2019

Shape coexistence in neutron-rich nuclei
journal, January 2016

Shape isomerism at $N = 40$ : Discovery of a proton intruder state in ${}^{67}{Co}$
journal, October 2008

Cross-shell excitation in two-proton knockout: Structure of ${}^{52}{Ca}$
journal, August 2006

Study of excited states in $^{208}$ Pb by particle- $γ$ coincidences with the $^{207} Pb {(d, p)}^{208} Pb$ and $^{209} Bi (t, α)^{208} Pb$ reactions
journal, September 1997

Competing particle–hole excitations in 30Na: Constraining state-of-the-art effective interactions
journal, September 2015

Single-particle structure at $N = 29$ : The structure of ${}^{47}{Ar}$ and first spectroscopy of ${}^{45}S$
journal, May 2016

NSCL and FRIB at Michigan State University: Nuclear science at the limits of stability
journal, April 2016

Commissioning the A1900 projectile fragment separator
journal, May 2003

The S800 spectrograph
journal, May 2003

Focal plane detector for the S800 high-resolution spectrometer
journal, February 1999

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA
journal, May 2013

The performance of the γ-ray tracking array GRETINA for γ-ray spectroscopy with fast beams of rare isotopes
journal, March 2017

New CsI(Na) hodoscope array for the S800 spectrograph at NSCL
journal, October 2011

IsoTagger: Identification of isomeric nuclear states produced in fragmentation reactions with radioactive beams
journal, January 2015

Evidence for a $β$ -decaying $1 / 2^{-}$ isomer in ${}^{71}{Ni}$
journal, April 2009

D IRECT R EACTIONS WITH E XOTIC N UCLEI
journal, December 2003

Neutron single-particle strengths at $N = 40$ , 42: Neutron knockout from ${}^{68, 70}{Ni}$ ground and isomeric states
journal, November 2016

In-beam nuclear spectroscopy of bound states with fast exotic ion beams
journal, January 2008

Lifetime measurement of the $4_{1}^{+}$ state of ${}^{58}{Ni}$ with the recoil distance method
journal, August 2016

Proton separation energies derived from the (d, 3He) reaction on f-p shell nuclei at 52 MeV
journal, September 1969

Low energy levels in ${}^{72}{Ni}$
journal, October 2003

$β$ decay of $^{66} Co,$ $^{68} Co,$ and $^{70} Co$
journal, April 2000

Coupling of valence particles/holes to 68,70Ni studied via measurements of the B(E2) strength in 67,69,70Ni and 71Cu
journal, May 2003

Structure of ${}^{70}{Fe}$ : Single-particle and collective degrees of freedom
journal, January 2019

New $T = 1$ effective interactions for the $f_{5 ∕ 2} p_{3 ∕ 2} p_{1 ∕ 2} g_{9 ∕ 2}$ model space: Implications for valence-mirror symmetry and seniority isomers
journal, October 2004