Low-lying dipole response of Ni64

Müscher, Miriam; Litvinova, Elena; Schwengner, Ronald; Beck, Tobias; Bemmerer, Daniel; Fiedler, F.; Finch, Sean W.; Friman-Gayer, Udo; Hammer, S.; Isaak, Johann; Janssens, Robert V. F.; Junghans, Arnd R.; Kelly, N.; Kluwig, Florian; Krishichayan, None; Müller, Stefan E.; Papst, Oliver; Römer, K.; Savran, Deniz; Scheck, Marcus; Schüttler, Tanja; Sinclair, J.; Szücs, Tamas; Tornow, Werner; Wagner, Andreas; Wilhelmy, J.; Zilges, Andreas

doi:10.1103/physrevc.109.044318

Title: Low-lying dipole response of Ni 64

Journal Article · 15 April 2024 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.109.044318 · OSTI ID:2337939

^[1];

^[2];

^[3];

^[4];

^[3]; Fiedler, F. ^[3];

^[5];

^[6]; Hammer, S. ^[3];

^[7];

^[8];

^[3]; Kelly, N. ^[9];

^[10];

^[5];

^[3];

^[7]; Römer, K. ^[3];

^[11];

^[9] more »

Univ. zu Koln (Germany); Univ of NC - Chapel Hill
Western Michigan Univ., Kalamazoo MI (United States); Michigan State Univ., East Lansing, MI (United States); Grand Accelerateur National d'Ions Lourds (GANIL), Caen (France); Centre National de la Recherche Scientifique (CNRS), Caen (France). Inst. National de Physique Nucleaire et de Physique des Particules (IN2P3)
Helmholtz-Zentrum Dresden-Rossendorf (Germany)
Michigan State Univ., East Lansing, MI (United States)
Duke Univ., Durham, NC (United States)
European Spallation Source ERIC (ESS), Lund (Sweden)
Technische Univ. Darmstadt (Germany)
Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory; Univ. of North Carolina, Chapel Hill, NC (United States)
University of the West of Scotland, Paisley (United Kingdom)
Univ. zu Koln (Germany)
GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
University of the West of Scotland, Paisley (United Kingdom); Scottish Universities Physics Alliance (SUPA) (United Kingdom)
Helmholtz-Zentrum Dresden-Rossendorf (Germany); Hungarian Academy of Sciences, Debrecen (Hungary), ATOMKI

In this work, two complementary real-photon scattering experiments were conducted on the proton-magic ⁶⁴Ni nucleus to study the dipole response up to its neutron-separation energy of $$S_n$$ = 9.7 MeV. By combining both measurements, 87 $$E$$1 and 23 $$M$$1 transitions were identified above 4.3 MeV. The results of the observed $$M$$1 transitions were compared to shell-model calculations using two different model spaces. It was found that the inclusion of excitations across the $$Z$$ = 28 shell gap in the calculations has a large impact. Furthermore, average cross sections for decays to the ground state (elastic transitions) as well as to lower-lying excited states (inelastic decays) were determined. The corresponding $$E$$1 channel was compared to calculations within the relativistic equation of motion (REOM) framework. Whereas the calculations of highest possible complexity reproduce the fragmentation and overall behavior of the $$E$$1 average elastic cross section well, the predicted absolute cross sections are approximately twice as high as the experimental upper limits even though the latter also include an estimate of the inelastic-decay channel.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: University of North Carolina, Chapel Hill, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); Science and Technology Facilities Council (STFC) (United Kingdom)

Grant/Contract Number:: FG02-97ER41041; FG02-97ER41033

OSTI ID:: 2337939

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 4 Vol. 109; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (61)

Investigation of nuclear structure by resonance fluorescence scattering Kneissl, U.; Pitz, H. H.; Zilges, A. Progress in Particle and Nuclear Physics, Vol. 37 https://doi.org/10.1016/0146-6410(96)00055-5	journal	January 1996
Realistic effective interactions for nuclear systems Hjorth-Jensen, Morten; Kuo, Thomas T. S.; Osnes, Eivind Physics Reports, Vol. 261, Issue 3-4 https://doi.org/10.1016/0370-1573(95)00012-6	journal	October 1995
Landau's collision term in the memory function approach to the nuclear response function and the spreading width of giant resonances Adachi, S.; Schuck, P. Nuclear Physics A, Vol. 496, Issue 3 https://doi.org/10.1016/0375-9474(89)90073-0	journal	June 1989
Energy levels of light nuclei A = 11−12 Ajzenberg-Selove, F. Nuclear Physics A, Vol. 506, Issue 1 https://doi.org/10.1016/0375-9474(90)90271-M	journal	January 1990
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
Concentration of electric dipole strength below the neutron separation energy in N=82 nuclei Zilges, A.; Volz, S.; Babilon, M. Physics Letters B, Vol. 542, Issue 1-2 https://doi.org/10.1016/S0370-2693(02)02309-2	journal	August 2002
Fine structure of the E1 response in 140Ce below the particle threshold Herzberg, R. -D.; von Brentano, P.; Eberth, J. Physics Letters B, Vol. 390, Issue 1-4 https://doi.org/10.1016/S0370-2693(96)01374-3	journal	January 1997
Generalized Brückner-Hartree-Fock theory and self-consistent RPA Dukelsky, J.; Röpke, G.; Schuck, P. Nuclear Physics A, Vol. 628, Issue 1 https://doi.org/10.1016/S0375-9474(97)00606-4	journal	January 1998
The Shell-Model Code NuShellX@MSU Brown, B. A.; Rae, W. D. M. Nuclear Data Sheets, Vol. 120 https://doi.org/10.1016/j.nds.2014.07.022	journal	June 2014
Nuclear Data Sheets for A=64 Singh, Balraj; Chen, Jun Nuclear Data Sheets, Vol. 178 https://doi.org/10.1016/j.nds.2021.11.002	journal	December 2021
The photon-scattering facility at the superconducting electron accelerator ELBE Schwengner, R.; Beyer, R.; Dönau, F. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 555, Issue 1-2 https://doi.org/10.1016/j.nima.2005.09.024	journal	December 2005
The high-efficiency spectroscopy setup at Löher, B.; Derya, V.; Aumann, T. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 723 https://doi.org/10.1016/j.nima.2013.04.087	journal	September 2013
Recent developments in Geant4 Allison, J.; Amako, K.; Apostolakis, J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 835 https://doi.org/10.1016/j.nima.2016.06.125	journal	November 2016
The photoresponse of stable nuclei below 10 MeV Volz, S.; Tsoneva, N.; Babilon, M. Nuclear Physics A, Vol. 779 https://doi.org/10.1016/j.nuclphysa.2006.08.012	journal	November 2006
Low-lying dipole strength in the well-deformed nucleus 156Gd Tamkas, M.; Açıksöz, E.; Isaak, J. Nuclear Physics A, Vol. 987 https://doi.org/10.1016/j.nuclphysa.2019.03.014	journal	July 2019
The effective force NL3 revisited Lalazissis, G. A.; Karatzikos, S.; Fossion, R. Physics Letters B, Vol. 671, Issue 1 https://doi.org/10.1016/j.physletb.2008.11.070	journal	January 2009
Constraining nuclear photon strength functions by the decay properties of photo-excited states Isaak, J.; Savran, D.; Krtička, M. Physics Letters B, Vol. 727, Issue 4-5 https://doi.org/10.1016/j.physletb.2013.10.040	journal	December 2013
The decay pattern of the Pygmy Dipole Resonance of 140Ce Löher, B.; Savran, D.; Aumann, T. Physics Letters B, Vol. 756 https://doi.org/10.1016/j.physletb.2016.02.042	journal	May 2016
Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce Savran, D.; Derya, V.; Bagchi, S. Physics Letters B, Vol. 786 https://doi.org/10.1016/j.physletb.2018.09.025	journal	November 2018
Research opportunities at the upgraded HIγS facility Weller, Henry R.; Ahmed, Mohammad W.; Gao, Haiyan Progress in Particle and Nuclear Physics, Vol. 62, Issue 1 https://doi.org/10.1016/j.ppnp.2008.07.001	journal	January 2009
Experimental studies of the Pygmy Dipole Resonance Savran, D.; Aumann, T.; Zilges, A. Progress in Particle and Nuclear Physics, Vol. 70 https://doi.org/10.1016/j.ppnp.2013.02.003	journal	May 2013
Isoscalar and isovector dipole excitations: Nuclear properties from low-lying states and from the isovector giant dipole resonance Bracco, A.; Lanza, E. G.; Tamii, A. Progress in Particle and Nuclear Physics, Vol. 106 https://doi.org/10.1016/j.ppnp.2019.02.001	journal	May 2019
Photonuclear reactions—From basic research to applications Zilges, A.; Balabanski, D. L.; Isaak, J. Progress in Particle and Nuclear Physics, Vol. 122 https://doi.org/10.1016/j.ppnp.2021.103903	journal	January 2022
Theoretical studies of Pygmy Resonances Lanza, E. G.; Pellegri, L.; Vitturi, A. Progress in Particle and Nuclear Physics, Vol. 129 https://doi.org/10.1016/j.ppnp.2022.104006	journal	March 2023
Bremsstrahlung cross-section with screening and Coulomb corrections at high energies Haug, Eberhard Radiation Physics and Chemistry, Vol. 77, Issue 3 https://doi.org/10.1016/j.radphyschem.2007.10.003	journal	March 2008
Effective interaction for nuclei of A = 50–100 and Gamow–Teller properties Honma, M.; Otsuka, T.; Mizusaki, T. Journal of Physics: Conference Series, Vol. 20 https://doi.org/10.1088/1742-6596/20/1/002	journal	January 2005
Giant Resonances: Fundamental High-Frequency Modes of Nuclear Excitation Harakeh, M. N.; van der Woude, A. https://doi.org/10.1093/oso/9780198517337.001.0001	book	May 2001
Analytical Dirac-Hartree-Fock-Slater screening function for atoms (Z=1–92) Salvat, F.; Mart̆nez, J. D.; Mayol, R. Physical Review A, Vol. 36, Issue 2 https://doi.org/10.1103/PhysRevA.36.467	journal	July 1987
Bremsstrahlung Cross-Section Formula Including a High-Order Coulomb Correction Roche, G.; Ducos, C.; Proriol, J. Physical Review A, Vol. 5, Issue 6 https://doi.org/10.1103/PhysRevA.5.2403	journal	June 1972
Toward an accurate strongly coupled many-body theory within the equation-of-motion framework Litvinova, Elena; Schuck, Peter Physical Review C, Vol. 100, Issue 6 https://doi.org/10.1103/PhysRevC.100.064320	journal	December 2019
Electric and magnetic dipole strength in Fe 54 Schwengner, R.; Massarczyk, R.; Beyer, R. Physical Review C, Vol. 101, Issue 6 https://doi.org/10.1103/PhysRevC.101.064303	journal	June 2020
High-sensitivity investigation of low-lying dipole strengths in Sn 120 Müscher, M.; Wilhelmy, J.; Massarczyk, R. Physical Review C, Vol. 102, Issue 1 https://doi.org/10.1103/PhysRevC.102.014317	journal	July 2020
Electric and magnetic dipole strength in Zn 66 Schwengner, R.; Massarczyk, R.; Scheck, M. Physical Review C, Vol. 103, Issue 2 https://doi.org/10.1103/PhysRevC.103.024312	journal	February 2021
Dipole response in Te128,130 below the neutron threshold Isaak, J.; Savran, D.; Löher, B. Physical Review C, Vol. 103, Issue 4 https://doi.org/10.1103/PhysRevC.103.044317	journal	April 2021
Model-independent determination of the dipole response of Zn66 using quasimonoenergetic and linearly polarized photon beams Savran, D.; Isaak, J.; Schwengner, R. Physical Review C, Vol. 106, Issue 4 https://doi.org/10.1103/PhysRevC.106.044324	journal	October 2022
Microscopic response theory for strongly coupled superfluid fermionic systems Litvinova, Elena; Zhang, Yinu Physical Review C, Vol. 106, Issue 6 https://doi.org/10.1103/PhysRevC.106.064316	journal	December 2022
Quantum benefit of the quantum equation of motion for the strongly coupled many-body problem Hlatshwayo, Manqoba Q.; Novak, John; Litvinova, Elena Physical Review C, Vol. 109, Issue 1 https://doi.org/10.1103/PhysRevC.109.014306	journal	January 2024
Dipole excitations to bound states in 116 Sn and 124 Sn Govaert, K.; Bauwens, F.; Bryssinck, J. Physical Review C, Vol. 57, Issue 5 https://doi.org/10.1103/PhysRevC.57.2229	journal	May 1998
Dipole transitions to bound states in 56 Fe and 58 Ni Bauwens, F.; Bryssinck, J.; De Frenne, D. Physical Review C, Vol. 62, Issue 2 https://doi.org/10.1103/PhysRevC.62.024302	journal	June 2000
New effective interaction for p f -shell nuclei and its implications for the stability of the N = Z = 28 closed core Honma, M.; Otsuka, T.; Brown, B. A. Physical Review C, Vol. 69, Issue 3 https://doi.org/10.1103/PhysRevC.69.034335	journal	March 2004
Multipole mixing ratios of transitions in B 11 Rusev, G.; Tonchev, A. P.; Schwengner, R. Physical Review C, Vol. 79, Issue 4 https://doi.org/10.1103/PhysRevC.79.047601	journal	April 2009
Fragmentation and systematics of the pygmy dipole resonance in the stable N = 82 isotones Savran, D.; Elvers, M.; Endres, J. Physical Review C, Vol. 84, Issue 2 https://doi.org/10.1103/PhysRevC.84.024326	journal	August 2011
Structure of the pygmy dipole resonance in 124 Sn Endres, J.; Savran, D.; Butler, P. A. Physical Review C, Vol. 85, Issue 6 https://doi.org/10.1103/PhysRevC.85.064331	journal	June 2012
Electromagnetic dipole strength of 136 Ba below the neutron separation energy Massarczyk, R.; Schwengner, R.; Dönau, F. Physical Review C, Vol. 86, Issue 1 https://doi.org/10.1103/PhysRevC.86.014319	journal	July 2012
Dipole strength distribution in 56 Fe Shizuma, T.; Hayakawa, T.; Ohgaki, H. Physical Review C, Vol. 87, Issue 2 https://doi.org/10.1103/PhysRevC.87.024301	journal	February 2013
Decay pattern of the pygmy dipole resonance in 60 Ni Scheck, M.; Ponomarev, V. Yu.; Aumann, T. Physical Review C, Vol. 87, Issue 5 https://doi.org/10.1103/PhysRevC.87.051304	journal	May 2013
Photoresponse of 60 Ni below 10-MeV excitation energy: Evolution of dipole resonances in f p -shell nuclei near N = Z Scheck, M.; Ponomarev, V. Yu.; Fritzsche, M. Physical Review C, Vol. 88, Issue 4 https://doi.org/10.1103/PhysRevC.88.044304	journal	October 2013
Low-lying dipole strength of the open-shell nucleus 94 Mo Romig, C.; Beller, J.; Glorius, J. Physical Review C, Vol. 88, Issue 4 https://doi.org/10.1103/PhysRevC.88.044331	journal	October 2013
Subtraction method and stability condition in extended random-phase approximation theories Tselyaev, V. I. Physical Review C, Vol. 88, Issue 5 https://doi.org/10.1103/PhysRevC.88.054301	journal	November 2013
Global performance of covariant energy density functionals: Ground state observables of even-even nuclei and the estimate of theoretical uncertainties Agbemava, S. E.; Afanasjev, A. V.; Ray, D. Physical Review C, Vol. 89, Issue 5 https://doi.org/10.1103/PhysRevC.89.054320	journal	May 2014
Low-energy dipole strength in Sn 112 , 120 Özel-Tashenov, B.; Enders, J.; Lenske, H. Physical Review C, Vol. 90, Issue 2 https://doi.org/10.1103/PhysRevC.90.024304	journal	August 2014
Photoneutron cross sections for Ni isotopes: Toward understanding ( n , γ ) cross sections relevant to weak s -process nucleosynthesis Utsunomiya, H.; Renstrøm, T.; Tveten, G. M. Physical Review C, Vol. 98, Issue 5 https://doi.org/10.1103/PhysRevC.98.054619	journal	November 2018
Fine Structure of the Pygmy Dipole Resonance in Xe 136 Savran, D.; Fritzsche, M.; Hasper, J. Physical Review Letters, Vol. 100, Issue 23 https://doi.org/10.1103/PhysRevLett.100.232501	journal	June 2008
Spectral Structure of the Pygmy Dipole Resonance Tonchev, A. P.; Hammond, S. L.; Kelley, J. H. Physical Review Letters, Vol. 104, Issue 7 https://doi.org/10.1103/PhysRevLett.104.072501	journal	February 2010
Low-Energy Magnetic Dipole Radiation in Open-Shell Nuclei Schwengner, R.; Frauendorf, S.; Brown, B. A. Physical Review Letters, Vol. 118, Issue 9 https://doi.org/10.1103/PhysRevLett.118.092502	journal	March 2017
Microscopic Structure of the Low-Energy Electric Dipole Response of Sn120 Weinert, M.; Spieker, M.; Potel, G. Physical Review Letters, Vol. 127, Issue 24 https://doi.org/10.1103/PhysRevLett.127.242501	journal	December 2021
Parity Measurements of Nuclear Levels Using a Free-Electron-Laser Generated γ -Ray Beam Pietralla, N.; Berant, Z.; Litvinenko, V. N. Physical Review Letters, Vol. 88, Issue 1 https://doi.org/10.1103/PhysRevLett.88.012502	journal	December 2001
Theoretical and simulation studies of characteristics of a Compton light source Sun, C.; Wu, Y. K. Physical Review Special Topics - Accelerators and Beams, Vol. 14, Issue 4 https://doi.org/10.1103/PhysRevSTAB.14.044701	journal	April 2011
Equations-of-Motion Method and the Extended Shell Model Rowe, D. J. Reviews of Modern Physics, Vol. 40, Issue 1 https://doi.org/10.1103/RevModPhys.40.153	journal	January 1968
Geant4 developments and applications Allison, J.; Amako, K.; Apostolakis, J. IEEE Transactions on Nuclear Science, Vol. 53, Issue 1 https://doi.org/10.1109/TNS.2006.869826	journal	February 2006
Shell-model description of neutron-rich pf-shell nuclei with a new effective interaction GXPF 1 Honma, M.; Otsuka, T.; Brown, B. A. The European Physical Journal A, Vol. 25, Issue S1 https://doi.org/10.1140/epjad/i2005-06-032-2	journal	April 2005

Similar Records

Dipole response in Te128,130 below the neutron threshold

Journal Article · 2021 · Physical Review. C · OSTI ID:1850177

Isaak, J.; Savran, D.; Löher, B.; +10 more

Coexistence of single-particle and collective excitation in Ni61

Journal Article · 2023 · Physical Review. C · OSTI ID:1975330

Bhattacharya, Soumik; Tripathi, Vandana; Rubino, E.; +10 more

Multistep Coulomb excitation of Ni64: Shape coexistence and nature of low-spin excitations

Journal Article · 2022 · Physical Review. C · OSTI ID:1892378

Little, D.; Ayangeakaa, A. D.; Janssens, R. V. F.; +18 more

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Title: Low-lying dipole response of Ni 64

Citation Formats

References (61)

Similar Records

Related Subjects