Parity nonconservation in neutron resonances

Alfimenkov, V.P.; Борзаков, С. Б.; Thuan, Vo Van; Mareev, Yu.D.; Pikelner, L.B.; Khrykin, A. S.; Sharapov, E.I.

doi:10.1016/0375-9474(83)90649-8

Cited by 226 publications

(97 citation statements)

References 10 publications

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“…Previous measurements of the deuterium cross section are summarized in Table IX. Most earlier measurements are higher than the current value but the more recent values of Alfimenkov et al [19] and Jurney [20], adopted by Mughabghab [7] are consistent with our new value. Sargent (1947) [21] Pile Oscillator 0.92±0.22 Kaplan (1952) [22] Diffusion a 0.572±0.…”

Section: Deuterium Cross Sectionsupporting

confidence: 90%

“…The targets were ≈3 mm thick and corrections for γ-ray attenuation were only necessary for E γ <100 keV. As discussed later in this paper all γ-rays observed were >500 keV, requiring no correction, except for two low energy transitions in 19 O whose intensities could be confirmed by intensity balances. Both targets were irradiated for 118801 s. The deuterated targets were enriched to >99.9% in deuterium.…”

Section: B Cross Section Measurementsmentioning

confidence: 99%

“…18 O(n,γ) cross section can also be determined by activation analysis from 19 O β − -decay (t 1/2 =28.66 s). We observe the 1357.32 keV γ-ray from this decay in the same spectrum as the prompt γ-rays.…”

Section: Thementioning

confidence: 99%

“…10 Jurney (1963) [10] Capture γ-ray 0.60±0.05 Trail (1964) [23] Capture γ-ray 0.36±0.03 Merritt (1967) [24] Activation 0.506±0.010 Merritt (1968) [25] Activation 0.521±0.009 Silk (1969) [26] Diffusion 0.523±0.0.029 Ishikawa (1973) [27] Activation 0.55±0. 10 Alfimenkov (1980) [19] NTOF 0.487±0.024 Jurney (1982) [20] Capture γ-ray 0.508±0.015 Mughabghab (2006) [7] Compilation 0.508±0.015 This work Capture γ-ray 0.489±0.006 a Neglects the contribution of oxygen.…”

Section: Deuterium Cross Sectionmentioning

confidence: 99%

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Thermal neutron capture cross sections forO16,17,18andH2
Firestone
¹
,
Révay
²

2016
Phys. Rev. C
26
4
70
1
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Thermal neutron capture γ-ray spectra for 16,17,18 16,17,18 O(n,γ) reactions were measured. Absolute transition probabilities were determined for each reaction by a least-squares fit of the γ-ray intensities to the decay schemes after accounting for the contribution from internal conversion. The transition probability for the 870.76 keV γ-ray from 16 O(n,γ) was measured as Pγ (871)=96.6±0.5% and the thermal neutron cross section for this γ-ray was determined as 0.164±0.003 mb by internal standardization with multiple targets containing oxygen and stoichiometric quantities of hydrogen, nitrogen, and carbon whose γ-ray cross sections were previously standardized. The γ-ray cross sections for the 17,18 O(n,γ) and 2 H(n,γ) reactions were then determined relative to 870.76-keV γ-ray cross section after accounting for the isotopic abundances in the targets. We determined the following total radiative thermal neutron cross sections for each isotope from the γ-ray cross sections and transition probabilities; σ0(

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Section: Deuterium Cross Sectionsupporting

confidence: 90%

Section: B Cross Section Measurementsmentioning

confidence: 99%

Section: Thementioning

confidence: 99%

Section: Deuterium Cross Sectionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal neutron capture cross sections forO16,17,18andH2
Firestone
¹
,
Révay
²

2016
Phys. Rev. C
26
4
70
1
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“…The predicted values were fi rst observed at JINR, Dubna [13,14]. It should -and does -occur in general in other strongly interacting quantum systems [15].)…”

Section: Parity Violation In Neutron Resonancesmentioning

confidence: 68%

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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Optics and Nuclear Photonics

Habs

2003

Digital Encyclopedia of Applied Physics

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Our discovery that the scattering of γ quanta from the very large electric fields of nuclei, called Delbrück scattering , results in a much larger real part of the index of refraction for γ‐rays than anticipated has manifold consequences. All older perturbative quantum electrodynamics ( QED ) predictions for a few million electronvolt γ‐rays by the first‐order Born approximation fail by many orders of magnitude and a new, more complex nonperturbative QED has to be applied. As the expected cross sections are now much larger, other nonperturbative high‐field QED effects such as photon splitting or an enhanced pair production close to the threshold are being investigated to study and understand this new high‐field QED with the ultrahigh electric fields of the nucleus. At the same time, the much larger Delbrück scattering allows to develop γ‐ray optics of up to about 10 MeV, with new focusing lenses and much more efficient γ monochromators. In combination with the development of much more intense, brilliant γ beams, this opens a new field of nuclear photonics. We, for the first time, will selectively excite individual nuclear levels for diagnostics of isotopes or their transmutation. The strongly penetrating γ beams focused to micrometer diameters open up new fields of diagnostics in medicine, green energy, nuclear waste management, and so on. We can produce about 50 new medical radioisotopes for cancer therapy or for the diagnostics of dose delivery to the tumor. Also, other brilliant secondary sources, such as cold neutron sources or moderated positron beams, can be produced, which open new ways for material or surface sciences.

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Parity nonconservation in neutron resonances

Cited by 226 publications

References 10 publications

Thermal neutron capture cross sections forO16,17,18andH2
Firestone
¹
,
Révay
²

2016
Phys. Rev. C
26
4
70
1
View full text Add to dashboard Cite

Thermal neutron capture cross sections forO16,17,18andH2
Firestone
¹
,
Révay
²

2016
Phys. Rev. C
26
4
70
1
View full text Add to dashboard Cite

Statistical behavior and symmetry tests

Optics and Nuclear Photonics

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Parity nonconservation in neutron resonances

Cited by 226 publications

References 10 publications

Thermal neutron capture cross sections forO16,17,18andH2Firestone1, Révay2 2016Phys. Rev. C264701View full textAdd to dashboardCite

Thermal neutron capture cross sections forO16,17,18andH2Firestone1, Révay2 2016Phys. Rev. C264701View full textAdd to dashboardCite

Statistical behavior and symmetry tests

Optics and Nuclear Photonics

Contact Info

Product

Resources

About

Thermal neutron capture cross sections forO16,17,18andH2
Firestone
¹
,
Révay
²

2016
Phys. Rev. C
26
4
70
1
View full text Add to dashboard Cite

Thermal neutron capture cross sections forO16,17,18andH2
Firestone
¹
,
Révay
²

2016
Phys. Rev. C
26
4
70
1
View full text Add to dashboard Cite