Fine structure of the isovector giant dipole resonance in Nd142–150 and Sm152

Donaldson, L. M.; Carter, J.; von Neumann-Cosel, P.; Nesterenko, V. O.; Neveling, R.; Reinhard, P. -G.; Usman, I. T.; Adsley, P.; Bertulani, C. A.; Brümmer, J. W.; Buthelezi, E. Z.; Cooper, G. R.  J.; Fearick, R. W.; Förtsch, S. V.; Fujita, H.; Fujita, Y.; Jingo, M.; Kheswa, N. Y.; Kleinig, W.; Kureba, C. O.; Kvasil, J.; Latif, M.; Li, K. C.  W.; Mira, J. P.; Nemulodi, F.; Papka, P.; Pellegri, L.; Pietralla, N.; Ponomarev, V. Yu.; Rebeiro, B.; Richter, A.; Shirikova, N. Yu.; Sideras-Haddad, E.; Sushkov, A. V.; Smit, F. D.; Steyn, G. F.; Swartz, J. A.; Tamii, A.

doi:10.1103/physrevc.102.064327

Title: Fine structure of the isovector giant dipole resonance in ${}^{142 – 150}{Nd}$ and ${}^{152}{Sm}$

Journal Article · Tue Dec 29 00:00:00 EST 2020 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.102.064327· OSTI ID:1849857

^[1]; Carter, J. ^[2]; von Neumann-Cosel, P. ^[3]; Nesterenko, V. O. ^[4]; Neveling, R. ^[5]; Reinhard, P. -G. ^[6]; Usman, I. T. ^[2]; Adsley, P. ^[7]; Bertulani, C. A. ^[8]; Brümmer, J. W. ^[9]; Buthelezi, E. Z. ^[5]; Cooper, G. R. J. ^[2]; Fearick, R. W. ^[10]; Förtsch, S. V. ^[5]; Fujita, H. ^[11]; Fujita, Y. ^[11]; Jingo, M. ^[2]; Kheswa, N. Y. ^[5]; Kleinig, W. ^[4]; Kureba, C. O. ^[12] more »

iThemba LABS, Faure (South Africa); Univ. of the Witwatersrand, Johannesburg (South Africa)
Univ. of the Witwatersrand, Johannesburg (South Africa)
Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik
Joint Inst. for Nuclear Research, Dubna (Russia). Bogoliubov Lab. of Theoretical Physics
iThemba LABS, Faure (South Africa)
Univ. Erlangen (Germany). Inst. for Theoretical Physics
iThemba LABS, Faure (South Africa); Univ. of the Witwatersrand, Johannesburg (South Africa); Stellenbosch Univ., Matieland (South Africa)
Texas A&M Univ., Commerce, TX (United States)
Stellenbosch Univ., Matieland (South Africa)
Univ. of Cape Town, Rondebosch (South Africa)
Osaka Univ. (Japan). Research Center for Nuclear Physics
Univ. of the Witwatersrand, Johannesburg (South Africa); Botswana International Univ. of Science and Technology, Palapye (Botswana)
Charles Univ., Prague (Czech Republic). Inst. of Particle and Nuclear Physics
iThemba LABS, Faure (South Africa); Stellenbosch Univ., Matieland (South Africa)
Univ. of the Western Cape, Cape Town (South Africa)

Inelastic proton scattering at energies of a few hundred MeV and very-forward scattering angles including 0° has been established as a tool for the study of electric-dipole strength distributions in nuclei. The present work reports a systematic investigation of the chain of stable even-mass Nd isotopes representing a transition from spherical to quadrupole-deformed nuclei. Extraction of the equivalent photo-absorption cross sections and analysis of their fine structure in the energy region of the isovector giant dipole resonance (IVGDR). Method: Proton inelastic scattering reactions of 200 MeV protons were measured at the iThemba Laboratory for Accelerator Based Sciences in Cape Town, South Africa. The scattering products were momentum-analyzed by the K600 magnetic spectrometer positioned at θ_Lab = 0°. Using dispersion-matching techniques, energy resolutions of ΔE ≈ 40–50 keV (full width at half maximum) were obtained. After subtraction of background and contributions from other multipoles, the spectra were converted to photoabsorption cross sections using the equivalent virtual-photon method. Wavelet-analysis techniques are used to extract characteristic energy scales of the fine structure of the IVGDR from the experimental data. Fine structure of the IVGDR is observed even for the most deformed nuclei studied. Comparisons between the extracted experimental energy scales and those energy scales obtained from the quasiparticle-phonon model (QPM) and Skyrme separable random phase approximation (SSRPA) predictions provide insight into the role of different giant-resonance damping mechanisms. It can be seen that the scales in the spherical and most likely also in the deformed nuclei mainly result from the fragmentation of the one-particle-one-hole (1p1h) strength into several dominant transitions serving as doorway states. In cases where calculations beyond the 1p1h level are available, some impact of the spreading due to coupling of the two-particle-two-hole (2p2h) states to the 1p1h doorway states is observed. New virtual-photon absorption data for the chain of stable Nd isotopes and ¹⁵²Sm are presented, with a focus on the phenomenon of nonstatistical cross-section fluctuations, referred to as fine structure, in the energy region of the IVGDR. The wavelet-analysis techniques used allowed for the features of the fine structure to be quantified in the form of characteristic scales. Finally, comparisons between experimental results and model predictions indicate that Landau damping seems to be the main source of the fine structure in both the spherical and deformed nuclei, but calculations including 2p2h degrees of freedom would be beneficial to confirm this for the deformed cases.

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Research Organization:: Texas A & M Univ., Commerce, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Research Foundation of South Africa; German Research Foundation (DFG); Czech Science Fondation

Grant/Contract Number:: FG02-08ER41533; 85509; SFB 1245; P203-19-14048S

OSTI ID:: 1849857

Journal Information:: Physical Review. C, Vol. 102, Issue 6; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (50)

Comparing time series using wavelet-based semblance analysis Cooper, G. R. J.; Cowan, D. R. Computers & Geosciences, Vol. 34, Issue 2 https://doi.org/10.1016/j.cageo.2007.03.009	journal	February 2008
Complete Electric Dipole Response and the Neutron Skin in ${}^{208}{Pb}$ Tamii, A.; Poltoratska, I.; von Neumann-Cosel, P. Physical Review Letters, Vol. 107, Issue 6 https://doi.org/10.1103/PhysRevLett.107.062502	journal	August 2011
The nuclear response within extended RPA theories Droz̊dz̊, S.; Nishizaki, S.; Speth, J. Physics Reports, Vol. 197, Issue 1 https://doi.org/10.1016/0370-1573(90)90084-F	journal	December 1990
Multiscale fluctuations in the nuclear response Lacroix, Denis; Chomaz, Philippe Physical Review C, Vol. 60, Issue 6 https://doi.org/10.1103/PhysRevC.60.064307	journal	November 1999
Origin of fine structure of the giant dipole resonance in $s d$ -shell nuclei Fearick, R. W.; Erler, B.; Matsubara, H. Physical Review C, Vol. 97, Issue 4 https://doi.org/10.1103/PhysRevC.97.044325	journal	April 2018
The giant dipole resonance in the transition region for the neodymium isotopes Carlos, P.; Beil, H.; Bergere, R. Nuclear Physics A, Vol. 172, Issue 2 https://doi.org/10.1016/0375-9474(71)90725-1	journal	September 1971
Tddft with Skyrme Forces: Effect of Time-Odd Densities on Electric Giant Resonances Nesterenko, V. O.; Kleinig, W.; Kvasil, J. International Journal of Modern Physics E, Vol. 17, Issue 01 https://doi.org/10.1142/S0218301308009586	journal	January 2008
Fine structure of the isovector giant dipole resonance in ${}^{208}{Pb}$ : Characteristic scales and level densities Poltoratska, I.; Fearick, R. W.; Krumbholz, A. M. Physical Review C, Vol. 89, Issue 5 https://doi.org/10.1103/PhysRevC.89.054322	journal	May 2014
Relativistic Coulomb excitation by a deformed projectile Bertulani, C. A. Physics Letters B, Vol. 319, Issue 4 https://doi.org/10.1016/0370-2693(93)91745-9	journal	December 1993
Fine structure of the isoscalar giant quadrupole resonance in ${}^{28}{Si}$ and ${}^{27}{Al}$ Usman, I. T.; Buthelezi, Z.; Carter, J. Physical Review C, Vol. 94, Issue 2 https://doi.org/10.1103/PhysRevC.94.024308	journal	August 2016
Electric and magnetic dipole modes in high-resolution inelastic proton scattering at 0° von Neumann-Cosel, Peter; Tamii, Atsushi The European Physical Journal A, Vol. 55, Issue 7 https://doi.org/10.1140/epja/i2019-12781-7	journal	July 2019
Electric and magnetic dipole strength in ${}^{112, 114, 116, 118, 120, 124}{Sn}$ Bassauer, S.; von Neumann-Cosel, P.; Reinhard, P. -G. Physical Review C, Vol. 102, Issue 3 https://doi.org/10.1103/PhysRevC.102.034327	journal	September 2020
Pairing gaps from nuclear mean-fieldmo dels Bender, M.; Rutz, K.; Reinhard, P. -G. The European Physical Journal A, Vol. 8, Issue 1 https://doi.org/10.1007/s10050-000-4504-z	journal	July 2000
Dipole polarizability of ${}^{120}{Sn}$ and nuclear energy density functionals Hashimoto, T.; Krumbholz, A. M.; Reinhard, P. -G. Physical Review C, Vol. 92, Issue 3 https://doi.org/10.1103/PhysRevC.92.031305	journal	September 2015
Fine structure of the isoscalar giant quadrupole resonance in 40Ca due to Landau damping? Usman, I.; Buthelezi, Z.; Carter, J. Physics Letters B, Vol. 698, Issue 3 https://doi.org/10.1016/j.physletb.2011.03.015	journal	April 2011
Scales in the fine structure of the magnetic dipole resonance: A wavelet approach to the shell model Petermann, I.; Langanke, K.; Martínez-Pinedo, G. Physical Review C, Vol. 81, Issue 1 https://doi.org/10.1103/PhysRevC.81.014308	journal	January 2010
New candidate for an alpha cluster condensed state in at 400 MeV Wakasa, T.; Ihara, E.; Fujita, K. Physics Letters B, Vol. 653, Issue 2-4 https://doi.org/10.1016/j.physletb.2007.08.016	journal	September 2007
Pygmy dipole resonance in $^{208}$ Pb Poltoratska, I.; von Neumann-Cosel, P.; Tamii, A. Physical Review C, Vol. 85, Issue 4 https://doi.org/10.1103/PhysRevC.85.041304	journal	April 2012
Excitation and photon decay of giant resonances from high-energy collisions of heavy ions Bertulani, C. A.; Nathan, A. M. Nuclear Physics A, Vol. 554, Issue 1 https://doi.org/10.1016/0375-9474(93)90363-3	journal	March 1993
Empirical Realization of a Critical Point Description in Atomic Nuclei Casten, R. F.; Zamfir, N. V. Physical Review Letters, Vol. 87, Issue 5 https://doi.org/10.1103/PhysRevLett.87.052503	journal	July 2001
Application of an extended random-phase approximation to giant resonances in light-, medium-, and heavy-mass nuclei Tselyaev, V.; Lyutorovich, N.; Speth, J. Physical Review C, Vol. 94, Issue 3 https://doi.org/10.1103/PhysRevC.94.034306	journal	September 2016
Giant resonances in nuclei Speth, J.; Woude, A. van der Reports on Progress in Physics, Vol. 44, Issue 7 https://doi.org/10.1088/0034-4885/44/7/002	journal	July 1981
Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited Donaldson, L. M.; Bertulani, C. A.; Carter, J. Physics Letters B, Vol. 776 https://doi.org/10.1016/j.physletb.2017.11.025	journal	January 2018
Gross, intermediate and fine structure of nuclear giant resonances: Evidence for doorway states von Neumann-Cosel, Peter; Ponomarev, Vladimir Yu.; Richter, Achim The European Physical Journal A, Vol. 55, Issue 12 https://doi.org/10.1140/epja/i2019-12795-1	journal	December 2019
An introduction to wavelets Graps, A. IEEE Computational Science and Engineering, Vol. 2, Issue 2 https://doi.org/10.1109/99.388960	journal	July 1995
Nucleon-nucleon t -matrix interaction for scattering at intermediate energies Franey, M. A.; Love, W. G. Physical Review C, Vol. 31, Issue 2 https://doi.org/10.1103/PhysRevC.31.488	journal	February 1985
Fine Structure of the Gamow-Teller Resonance in ${}^{90}{Nb}$ and Level Density of $1^{+}$ States Kalmykov, Y.; Adachi, T.; Berg, G. P. A. Physical Review Letters, Vol. 96, Issue 1 https://doi.org/10.1103/PhysRevLett.96.012502	journal	January 2006
Magnetic quadrupole resonance in spherical nuclei Ponomarev, V. Yu.; Soloviev, V. G.; Stoyanov, Ch. Nuclear Physics A, Vol. 323, Issue 2-3 https://doi.org/10.1016/0375-9474(79)90119-2	journal	July 1979
Realization of matching conditions for high-resolution spectrometers Fujita, H.; Fujita, Y.; Berg, G. P. A. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 484, Issue 1-3 https://doi.org/10.1016/S0168-9002(01)01970-2	journal	May 2002
Global investigation of the fine structure of the isoscalar giant quadrupole resonance Shevchenko, A.; Burda, O.; Carter, J. Physical Review C, Vol. 79, Issue 4 https://doi.org/10.1103/PhysRevC.79.044305	journal	April 2009
Measurement of high energy resolution inelastic proton scattering at and close to zero degrees Tamii, A.; Fujita, Y.; Matsubara, H. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 605, Issue 3 https://doi.org/10.1016/j.nima.2009.03.248	journal	July 2009
Low-energy electric dipole response in 120 Sn Krumbholz, A. M.; von Neumann-Cosel, P.; Hashimoto, T. Physics Letters B, Vol. 744 https://doi.org/10.1016/j.physletb.2015.03.023	journal	May 2015
Evolution of the dipole polarizability in the stable tin isotope chain Bassauer, S.; von Neumann-Cosel, P.; Reinhard, P. -G. Physics Letters B, Vol. 810 https://doi.org/10.1016/j.physletb.2020.135804	journal	November 2020
Studies of the Giant Dipole Resonance in 27Al , 40Ca , 56Fe , 58Ni and 208Pb with high energy-resolution inelastic proton scattering under 0° Jingo, M.; Buthelezi, E. Z.; Carter, J. The European Physical Journal A, Vol. 54, Issue 12 https://doi.org/10.1140/epja/i2018-12664-5	journal	December 2018
Extracting the spectral signature of $α$ clustering in ${}^{44, 48, 52}{Ti}$ using a continuous wavelet transform Bailey, Sam; Kokalova, Tzany; Freer, Martin Physical Review C, Vol. 100, Issue 5 https://doi.org/10.1103/PhysRevC.100.051302	journal	November 2019
Systematic study of $L ⩽ 3$ giant resonances in Sm isotopes via multipole decomposition analysis Itoh, M.; Sakaguchi, H.; Uchida, M. Physical Review C, Vol. 68, Issue 6 https://doi.org/10.1103/PhysRevC.68.064602	journal	December 2003
Electromagnetic processes in relativistic heavy ion collisions Bertulani, Carlos A.; Baur, Gerhard Physics Reports, Vol. 163, Issue 5-6 https://doi.org/10.1016/0370-1573(88)90142-1	journal	June 1988
Measurements of the giant dipole resonance with monoenergetic photons Berman, B. L.; Fultz, S. C. Reviews of Modern Physics, Vol. 47, Issue 3 https://doi.org/10.1103/RevModPhys.47.713	journal	July 1975
Wavelet signatures of K-splitting of the Isoscalar Giant Quadrupole Resonance in deformed nuclei from high-resolution (p,p′) scattering off 146, 148, 150Nd Kureba, C. O.; Buthelezi, Z.; Carter, J. Physics Letters B, Vol. 779 https://doi.org/10.1016/j.physletb.2018.02.013	journal	April 2018
A high energy-resolution zero degree facility for (p,p′) and (p,t) reactions Neveling, R.; Fujita, H.; Smit, F. D. Journal of Physics: Conference Series, Vol. 312, Issue 5 https://doi.org/10.1088/1742-6596/312/5/052016	journal	September 2011
High energy-resolution zero-degree facility for light-ion scattering and reactions at iThemba LABS Neveling, R.; Fujita, H.; Smit, F. D. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 654, Issue 1 https://doi.org/10.1016/j.nima.2011.06.077	journal	October 2011
Giant dipole resonance in heavy deformed nuclei Ishkhanov, B. S.; Troshchiev, S. Yu. Moscow University Physics Bulletin, Vol. 66, Issue 4 https://doi.org/10.3103/S0027134911040102	journal	August 2011
Fine Structure in the Energy Region of the Isoscalar Giant Quadrupole Resonance: Characteristic Scales from a Wavelet Analysis Shevchenko, A.; Carter, J.; Fearick, R. W. Physical Review Letters, Vol. 93, Issue 12 https://doi.org/10.1103/PhysRevLett.93.122501	journal	September 2004
Nuclear Shapes and Shape Transitions Bengtsson, R.; Möller, P.; Nix, J. R. Physica Scripta, Vol. 29, Issue 5 https://doi.org/10.1088/0031-8949/29/5/002	journal	May 1984
A Skyrme parametrization from subnuclear to neutron star densities Part II. Nuclei far from stabilities Chabanat, E.; Bonche, P.; Haensel, P. Nuclear Physics A, Vol. 635, Issue 1-2 https://doi.org/10.1016/S0375-9474(98)00180-8	journal	May 1998
Analysis of fine structure in the nuclear continuum Shevchenko, A.; Carter, J.; Cooper, G. R. J. Physical Review C, Vol. 77, Issue 2 https://doi.org/10.1103/PhysRevC.77.024302	journal	February 2008
Description of the dipole giant resonance in heavy and superheavy nuclei within Skyrme random-phase approximation Kleinig, W.; Nesterenko, V. O.; Kvasil, J. Physical Review C, Vol. 78, Issue 4 https://doi.org/10.1103/PhysRevC.78.044313	journal	October 2008
Self-consistent separable random-phase approximation for Skyrme forces: Giant resonances in axial nuclei Nesterenko, V. O.; Kleinig, W.; Kvasil, J. Physical Review C, Vol. 74, Issue 6 https://doi.org/10.1103/PhysRevC.74.064306	journal	December 2006
Effective nucleon-nucleon interaction for scattering at intermediate energies Love, W. G.; Franey, M. A. Physical Review C, Vol. 24, Issue 3 https://doi.org/10.1103/PhysRevC.24.1073	journal	September 1981
The giant dipole resonance in the transition region of the samarium isotopes Carlos, P.; Beil, H.; Bergère, R. Nuclear Physics A, Vol. 225, Issue 1 https://doi.org/10.1016/0375-9474(74)90373-X	journal	June 1974

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Title: Fine structure of the isovector giant dipole resonance in Nd 142 – 150 and Sm 152

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Title: Fine structure of the isovector giant dipole resonance in ${}^{142 – 150}{Nd}$ and ${}^{152}{Sm}$