Spectral statistics and the fine structure of the electric pygmy dipole resonance in N=82 nuclei
(2004) In Nuclear Physics, Section A 741. p.3-28- Abstract
- We study the statistical properties of the electric pygmy dipole resonance in four different isotones with neutron number N = 82. These nuclei are Ba-138(56), Ce-140(58), Nd-142(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 Ba-138(56), Ce-140(58), Nd-142(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/269442
- author
- Enders, J ; Guhr, Thomas LU ; Heine, A ; von Neumann-Cosel, 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, Sm-144, Nd-142, Ce-140, nuclear structure Ba-138, 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
- 0375-9474
- DOI
- 10.1016/j.nuclphysa.2004.05.014
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)
- id
- a979829d-3b51-44b8-9176-36cdb8f685ac (old id 269442)
- date added to LUP
- 2016-04-01 17:13:56
- date last changed
- 2022-02-20 19:31:03
@article{a979829d-3b51-44b8-9176-36cdb8f685ac, abstract = {{We study the statistical properties of the electric pygmy dipole resonance in four different isotones with neutron number N = 82. These nuclei are Ba-138(56), Ce-140(58), Nd-142(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 Neumann-Cosel, P and Ponomarev, VY and Richter, A and Wambach, J}}, issn = {{0375-9474}}, keywords = {{pygmy dipole resonance strength distributions; Sm-144; Nd-142; Ce-140; nuclear structure Ba-138; analyzed electric; level density; deduced; statistical properties; quasiparticle phonon model calculations}}, language = {{eng}}, pages = {{3--28}}, 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}}, doi = {{10.1016/j.nuclphysa.2004.05.014}}, volume = {{741}}, year = {{2004}}, }