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Separation of the 1+/1- parity doublet in 20Ne

Beller, J. ; Stumpf, C. ; Scheck, M. ; Pietralla, N. ; Deleanu, D. ; Filipescu, D. M. ; Glodariu, T. ; Haxton, W. ; Idini, A. LU orcid and Kelley, J. H. , et al. (2015) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 741. p.128-133
Abstract

The (J, T)=(1, 1) parity doublet in 20Ne at 11.26 MeV is a good candidate to study parity violation in nuclei. However, its energy splitting is known with insufficient accuracy for quantitative estimates of parity violating effects. To improve on this unsatisfactory situation, nuclear resonance fluorescence experiments using linearly and circularly polarized γ-ray beams were used to determine the energy difference of the parity doublet δE=E(1-)-E(1+)=-3.2(±0.7)stat(-1.2 +0.6)sys keV and the ratio of their integrated cross sections Is,0 (+)/Is,0(-)=29(±3)stat(-7 ... (More)

The (J, T)=(1, 1) parity doublet in 20Ne at 11.26 MeV is a good candidate to study parity violation in nuclei. However, its energy splitting is known with insufficient accuracy for quantitative estimates of parity violating effects. To improve on this unsatisfactory situation, nuclear resonance fluorescence experiments using linearly and circularly polarized γ-ray beams were used to determine the energy difference of the parity doublet δE=E(1-)-E(1+)=-3.2(±0.7)stat(-1.2 +0.6)sys keV and the ratio of their integrated cross sections Is,0 (+)/Is,0(-)=29(±3)stat(-7 +14)sys. Shell-model calculations predict a parity-violating matrix element having a value in the range 0.46-0.83 eV for the parity doublet. The small energy difference of the parity doublet makes 20Ne an excellent candidate to study parity violation in nuclear excitations.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Parity doublet, Parity violation
in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
741
pages
6 pages
publisher
Elsevier
external identifiers
  • scopus:84919936223
ISSN
0370-2693
DOI
10.1016/j.physletb.2014.12.018
language
English
LU publication?
no
id
5863ebc1-9e43-415f-82a1-86187a400b29
date added to LUP
2020-07-27 09:01:44
date last changed
2022-07-05 15:45:13
@article{5863ebc1-9e43-415f-82a1-86187a400b29,
  abstract     = {{<p>The (J, T)=(1, 1) parity doublet in <sup>20</sup>Ne at 11.26 MeV is a good candidate to study parity violation in nuclei. However, its energy splitting is known with insufficient accuracy for quantitative estimates of parity violating effects. To improve on this unsatisfactory situation, nuclear resonance fluorescence experiments using linearly and circularly polarized γ-ray beams were used to determine the energy difference of the parity doublet δE=E(1<sup>-</sup>)-E(1<sup>+</sup>)=-3.2(±0.7)stat(<sub>-1.2</sub>                             <sup>+0.6</sup>)sys keV and the ratio of their integrated cross sections I<sub>s,0</sub>                             <sup>(+)</sup>/Is,0(-)=29(±3)<sub>stat</sub>(<sub>-7</sub>                             <sup>+14</sup>)<sub>sys</sub>. Shell-model calculations predict a parity-violating matrix element having a value in the range 0.46-0.83 eV for the parity doublet. The small energy difference of the parity doublet makes <sup>20</sup>Ne an excellent candidate to study parity violation in nuclear excitations.</p>}},
  author       = {{Beller, J. and Stumpf, C. and Scheck, M. and Pietralla, N. and Deleanu, D. and Filipescu, D. M. and Glodariu, T. and Haxton, W. and Idini, A. and Kelley, J. H. and Kwan, E. and Martinez-Pinedo, G. and Raut, R. and Romig, C. and Roth, R. and Rusev, G. and Savran, D. and Tonchev, A. P. and Tornow, W. and Wagner, J. and Weller, H. R. and Zamfir, N. V. and Zweidinger, M.}},
  issn         = {{0370-2693}},
  keywords     = {{Parity doublet; Parity violation}},
  language     = {{eng}},
  month        = {{02}},
  pages        = {{128--133}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Separation of the 1<sup>+</sup>/1<sup>-</sup> parity doublet in <sup>20</sup>Ne}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2014.12.018}},
  doi          = {{10.1016/j.physletb.2014.12.018}},
  volume       = {{741}},
  year         = {{2015}},
}