Parity violation in compound nuclei: experimental methods and recent results

Mitchell, G. E.; Bowman, J. D.; Penttilä, S. I.; Sharapov, E.I.

doi:10.1016/s0370-1573(01)00016-3

Cited by 114 publications

(68 citation statements)

References 105 publications

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“…However, large paritynonconservation effects have been observed in p-wave resonances of several isotopes, measured by the asymmetry of the neutron transmission of polarized neutrons on unpolarized nuclei [3,12]. These effects, on the order of 10 −7 in nucleonnucleon interactions, were found to be up to 10% for 232 Th in transmission experiments [13,14].…”

Section: Introductionmentioning

confidence: 99%

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Aerts¹,

Fujii²,

Vlastou³

et al. 2006

Phys. Rev. C

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We have measured the neutron capture reaction yield of 232 Th at the neutron time-of-flight facility n TOF at CERN in the energy range from 1 eV to 1 MeV. The average capture cross section has been extracted in the energy range from 4 keV up to 1 MeV with an overall accuracy better than 4%. An independent IAEA evaluation shows good agreement with the data. The average cross section has been expressed in terms of average resonance parameters using the partial waves = 0, 1, and 2.

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Section: Introductionmentioning

confidence: 99%

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Aerts¹,

Fujii²,

Vlastou³

et al. 2006

Phys. Rev. C

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“…The distribution of energy spacings has been known for a long time to obey a Porter-Thomas distribution [298] in agreement with the predictions of random matrix theory, and statistical approaches have been used to understand isospin violation in heavy nuclei [299]. Statistical analyses have been applied to an extensive series of measurements of parity violation in heavy nuclei performed mainly at Dubna, KEK, and LANSCE [300,301].…”

Section: Test Of Statistical Theories For Heavy Nuclei Matrix Elementsmentioning

confidence: 99%

Fundamental Neutron Physics

Nico

Snow

2005

Annu. Rev. Nucl. Part. Sci.

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▪ Abstract Experiments using slow neutrons address a growing range of scientific issues spanning nuclear physics, particle physics, astrophysics, and cosmology. The field of fundamental physics using neutrons has experienced a significant increase in activity over the last two decades. This review summarizes some of the recent developments in the field and outlines some of the prospects for future research.

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“…It should -and does -occur in general in other strongly interacting quantum systems [15].) The history and development of this subfi eld is briefly reviewed by Mitchell et al [6]. Unfortunately experimental limitations on the neutron flux prevented the Dubna group from extending their seminal measurements to higher energies.…”

Section: Parity Violation In Neutron Resonancesmentioning

confidence: 99%

“…The TRIPLE collaboration was formed to extend these parity violation measurements to higher neutron energies, to more resonances, and to a wider range of targets. The details of the experimental efforts of this group are given in the previously cited review [6]. In favorable cases the parity violation is apparent by inspection in the raw data.…”

Section: Parity Violation In Neutron Resonancesmentioning

confidence: 99%

“…As we shall discuss below, the size of the measured longitudinal asymmetry (helicity dependence of the total cross section) for neutron resonances in heavy nuclei is amplifi ed by a factor of 10 6 relative to the longitudinal asymmetry measured in the nucleon-nucleon system. The details of these experimental results, as well as the historical background, are presented in a comprehensive review [6].…”

Section: Introductionmentioning

confidence: 99%

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Statistical behavior and symmetry tests

Mitchell¹,

Shriner²

2004

Braz. J. Phys.

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Symmetries and statistical properties in nuclei are closely related. The most striking example is the extremely large enhancement of parity violation in neutron resonances. Statistical distributions can provide information about the underlying character of nuclear properties. Level statistics and electromagnetic transition distributions have been used successfully to provide unique tests of predictions of random matrix theory.

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Parity violation in compound nuclei: experimental methods and recent results

Cited by 114 publications

References 105 publications

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Fundamental Neutron Physics

Statistical behavior and symmetry tests

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