Parity nonconservation for neutron resonances in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">U</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>238</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Bowman, J. D.; Bowman, C.D.; Bush, J. E.; Delheij, P. P. J.; Frankle, C.M.; Gould, C.R.; Haase, D. G.; Knudson, J. N.; Mitchell, G. E.; Penttilä, S. I.; Postma, H.; Roberson, N. R.; Seestrom, S.J.; Szymański, J.; Yuan, V. W.; Zhu, X.

doi:10.1103/physrevlett.65.1192

Cited by 98 publications

(61 citation statements)

References 13 publications

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“…[3] is how to calculate M when the operator O in Eq. (7) is the interaction V P N C , corresponding to the hadronic parity-violating interaction between two particles in free-space;…”

Section: Formulation Of Statistical Theory For Parity Violationmentioning

confidence: 99%

“…The status of statistical spectroscopy in the other nuclei measured in Ref. [3] will be explored more fully in a later paper [5]. On the other hand, the application of statistical spectroscopy to parity violation raises new issues, and it is the main purpose of this paper to identify the new issues and show how statistical spectroscopy may be implemented in view of them.…”

Section: Introductionmentioning

confidence: 98%

“…In this case [2], measurements based on longitudinally polarized neutron scattering and focusing on the hadronic parity nonconserving (PNC) interaction have become available only in the last 5 -10 years, and development of the microscopic statistical approach is being stimulated by the availability of this data. The main focus of the latest experiments [3] has been the strength function of the effective PNC interaction in nuclei in the mass A ∼ 230 and mass A ∼ 100 regions of the periodic table.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper we will develop the theory in a study of parity violation for the targets measured in Ref. [3], namely 238 U for A ∼ 230 and 104,105,106,108 Pd for A ∼ 100. The statistical densities that we will need are calculated using realistic single-particle energies and a residual strong interaction adjusted to fit the experimental density of states in the two elements of interest here.…”

Section: Introductionmentioning

confidence: 99%

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Statistical theory of parity nonconservation in compound nuclei

et al. 2000

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We present the first application of statistical spectroscopy to study the rootmean-square value of the parity nonconserving (PNC) interaction matrix element M determined experimentally by scattering longitudinally polarized neutrons from compound nuclei. Our effective PNC interaction consists of a standard two-body meson-exchange piece and a "doorway" term to account for 0 − spin-flip excitations. Strength functions are calculated using realistic single-particle energies and a residual strong interaction adjusted to fit the experimental density of states for the targets, 238 U for A ∼ 230 and 104,105,106,108 Pd for A ∼ 100. Using the standard Desplanques, Donoghue, and Holstein estimates of the weak PNC meson-nucleon coupling constants, we find that M is about a factor of 3 smaller than the experimental value for 238 U and about a factor of 1.7 smaller for Pd. The significance of this result for refining the empirical determination of the weak coupling constants is discussed.

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“…[3] is how to calculate M when the operator O in Eq. (7) is the interaction V P N C , corresponding to the hadronic parity-violating interaction between two particles in free-space;…”

Section: Formulation Of Statistical Theory For Parity Violationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Statistical theory of parity nonconservation in compound nuclei

et al. 2000

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“…However, we emphasize that this asymmetry can be measured in the (n, γ) reaction for several individual γ-transitions from the same p-wave resonance. The latter would allow high precision measurements of < V P N C >, and would provide an independent probe of important theoretical issues raised by the observations and analyses of the TRIPLE [5] measurements. …”

Section: Discussionmentioning

confidence: 99%

Parity violation in partial neutron capture reactions

Hayes

Zanini

2002

Phys. Rev. C

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In the last decade, the scattering of polarized neutrons on compound nucleus resonances proved to be a powerful experimental technique for probing nuclear parity violation. Longitudinal analyzing powers in neutron transmission measurements on p-wave resonances in nuclei such as 139 La and 232 Th were found to be as large as 10%. Here we examine the possibilities of carrying out a parallel program to measure asymmetries in the (n, γ) reaction on these same compound nuclear resonances. Symmetry-violating (n, γ) studies can also show asymmetries as large as 10%, and have the advantage over transmission experiments of allowing parity-odd asymmetries in several different gamma-decay branches from the same resonance. Thus, studies of parity violation in the (n, γ) reaction using high efficiency germanium detectors at the Los Alamos Lujan facility, for example, could determine the parity-odd nucleon-nucleon matrix elements in complex nuclei with high accuracy. Additionally, simultaneous studies of the E1 and V P N C matrix elements involved in these decays could be used to help constrain the statistical theory of parity non-conservation in compound nuclei.

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Introduction

Sukhoruchkin¹,

Soroko²,

Deriglazov³

Landolt-Börnstein - Group I Elementary Particles, Nuclei and Atoms

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Parity nonconservation for neutron resonances inU238

Cited by 98 publications

References 13 publications

Statistical theory of parity nonconservation in compound nuclei

Statistical theory of parity nonconservation in compound nuclei

Parity violation in partial neutron capture reactions

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