Spectral statistics and the fine structure of the electric pygmy dipole resonance in N=82 nuclei
(2004) In Nuclear Physics, Section A 741. p.328 Abstract
 We study the statistical properties of the electric pygmy dipole resonance in four different isotones with neutron number N = 82. These nuclei are Ba138(56), Ce140(58), Nd142(60), (144)(62)sm. The data set comprises levels with spin and parity J(pi) = 1() and their ground state B(E1) transition strengths. The statistics are found to be "mixed", i.e., in between the predictions of random matrix theory for correlated and uncorrelated spectra. Moreover, we calculate spectra and transition strengths in the quasiparticle phonon model (QPM). We compare experimental and theoretical findings. The incompleteness of the data sets and its impact on the results is discussed. A consistent picture emerges which yields an improved understanding of... (More)
 We study the statistical properties of the electric pygmy dipole resonance in four different isotones with neutron number N = 82. These nuclei are Ba138(56), Ce140(58), Nd142(60), (144)(62)sm. The data set comprises levels with spin and parity J(pi) = 1() and their ground state B(E1) transition strengths. The statistics are found to be "mixed", i.e., in between the predictions of random matrix theory for correlated and uncorrelated spectra. Moreover, we calculate spectra and transition strengths in the quasiparticle phonon model (QPM). We compare experimental and theoretical findings. The incompleteness of the data sets and its impact on the results is discussed. A consistent picture emerges which yields an improved understanding of the statistical properties of the pygmy resonance. ( (Less)
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http://lup.lub.lu.se/record/269442
 author
 Enders, J; Guhr, Thomas ^{LU} ; Heine, A; von NeumannCosel, P; Ponomarev, VY; Richter, A and Wambach, J
 organization
 publishing date
 2004
 type
 Contribution to journal
 publication status
 published
 subject
 keywords
 pygmy dipole resonance strength distributions, Sm144, Nd142, Ce140, nuclear structure Ba138, analyzed electric, level density, deduced, statistical properties, quasiparticle phonon model calculations
 in
 Nuclear Physics, Section A
 volume
 741
 pages
 3  28
 publisher
 Elsevier
 external identifiers

 wos:000223376400001
 scopus:4043102685
 ISSN
 03759474
 DOI
 10.1016/j.nuclphysa.2004.05.014
 language
 English
 LU publication?
 yes
 id
 a979829d3b5144b8917636cdb8f685ac (old id 269442)
 date added to LUP
 20071022 08:29:22
 date last changed
 20180107 09:50:34
@article{a979829d3b5144b8917636cdb8f685ac, abstract = {We study the statistical properties of the electric pygmy dipole resonance in four different isotones with neutron number N = 82. These nuclei are Ba138(56), Ce140(58), Nd142(60), (144)(62)sm. The data set comprises levels with spin and parity J(pi) = 1() and their ground state B(E1) transition strengths. The statistics are found to be "mixed", i.e., in between the predictions of random matrix theory for correlated and uncorrelated spectra. Moreover, we calculate spectra and transition strengths in the quasiparticle phonon model (QPM). We compare experimental and theoretical findings. The incompleteness of the data sets and its impact on the results is discussed. A consistent picture emerges which yields an improved understanding of the statistical properties of the pygmy resonance. (}, author = {Enders, J and Guhr, Thomas and Heine, A and von NeumannCosel, P and Ponomarev, VY and Richter, A and Wambach, J}, issn = {03759474}, keyword = {pygmy dipole resonance strength distributions,Sm144,Nd142,Ce140,nuclear structure Ba138,analyzed electric,level density,deduced,statistical properties,quasiparticle phonon model calculations}, language = {eng}, pages = {328}, publisher = {Elsevier}, series = {Nuclear Physics, Section A}, title = {Spectral statistics and the fine structure of the electric pygmy dipole resonance in N=82 nuclei}, url = {http://dx.doi.org/10.1016/j.nuclphysa.2004.05.014}, volume = {741}, year = {2004}, }