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Title: Parity nonconservation for neutron resonances in sup 238 U

Abstract

Parity nonconservation (PNC) was studied for 16 {ital p}-wave resonances in {sup 238}U by measuring the helicity dependence of the total cross section for epithermal neutrons scattered from {sup 238}U. A statistical analysis yields a root-mean-square PNC matrix element {ital M}=0.56{sub {minus}0.20}{sup +0.41} meV, which corresponds to a spreading width of {Gamma}{sup PV}=0.9{times}10{sup {minus}7} eV. Under plausible assumptions this gives a value of 4{times}10{sup {minus}7} for {vert bar}{alpha}{sub {ital p}}{vert bar}, the ratio of strengths of the {ital P}-odd and {ital P}-even effective nucleon-nucleon interactions.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. Duke University, Durham, North Carolina 27706 (United States) Triangle Universities Nuclear Laboratory, Durham, North Carolina 27706 (United States) Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) North Carolina State University, Raleigh, North Carolina 27695 (United States) Triangle Universities Nuclear Laboratory, Durham, North Carolina 27706 (United States) TRIUMF, Vancouver, British Columbia, V6T 2A3 (Canada) University of Technology, P.O. Box 5046, 2600 GA, Delft (Netherlands)
Publication Date:
OSTI Identifier:
7035107
DOE Contract Number:  
FG05-88ER40441; FG05-91ER40619; W-7405-ENG-36
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (United States)
Additional Journal Information:
Journal Volume: 46:2; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; NEUTRON REACTIONS; P INVARIANCE; URANIUM 238 TARGET; EPITHERMAL NEUTRONS; MATRIX ELEMENTS; NUCLEON-NUCLEON INTERACTIONS; RESONANCE SCATTERING; SYMMETRY BREAKING; TOTAL CROSS SECTIONS; BARYON REACTIONS; BARYON-BARYON INTERACTIONS; BARYONS; CROSS SECTIONS; ELEMENTARY PARTICLES; FERMIONS; HADRON REACTIONS; HADRON-HADRON INTERACTIONS; HADRONS; INELASTIC SCATTERING; INTERACTIONS; INVARIANCE PRINCIPLES; NEUTRONS; NUCLEAR REACTIONS; NUCLEON REACTIONS; NUCLEONS; PARTICLE INTERACTIONS; SCATTERING; TARGETS; 663430* - Nucleon-Induced Reactions & Scattering- (1992-); 663590 - Nuclear Mass Ranges- A=220 & Above- (1992-)

Citation Formats

Zhu, X, 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, Penttilae, S, Postma, H, Roberson, N R, Seestrom, S J, Szymanski, J J, Yuan, V W, and TRIPLE Collaboration). Parity nonconservation for neutron resonances in sup 238 U. United States: N. p., 1992. Web. doi:10.1103/PhysRevC.46.768.
Zhu, X, 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, Penttilae, S, Postma, H, Roberson, N R, Seestrom, S J, Szymanski, J J, Yuan, V W, & TRIPLE Collaboration). Parity nonconservation for neutron resonances in sup 238 U. United States. doi:10.1103/PhysRevC.46.768.
Zhu, X, 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, Penttilae, S, Postma, H, Roberson, N R, Seestrom, S J, Szymanski, J J, Yuan, V W, and TRIPLE Collaboration). Sat . "Parity nonconservation for neutron resonances in sup 238 U". United States. doi:10.1103/PhysRevC.46.768.
@article{osti_7035107,
title = {Parity nonconservation for neutron resonances in sup 238 U},
author = {Zhu, X and Bowman, J D and Bowman, C D and Bush, J E and Delheij, P P.J. and Frankle, C M and Gould, C R and Haase, D G and Knudson, J N and Mitchell, G E and Penttilae, S and Postma, H and Roberson, N R and Seestrom, S J and Szymanski, J J and Yuan, V W and TRIPLE Collaboration)},
abstractNote = {Parity nonconservation (PNC) was studied for 16 {ital p}-wave resonances in {sup 238}U by measuring the helicity dependence of the total cross section for epithermal neutrons scattered from {sup 238}U. A statistical analysis yields a root-mean-square PNC matrix element {ital M}=0.56{sub {minus}0.20}{sup +0.41} meV, which corresponds to a spreading width of {Gamma}{sup PV}=0.9{times}10{sup {minus}7} eV. Under plausible assumptions this gives a value of 4{times}10{sup {minus}7} for {vert bar}{alpha}{sub {ital p}}{vert bar}, the ratio of strengths of the {ital P}-odd and {ital P}-even effective nucleon-nucleon interactions.},
doi = {10.1103/PhysRevC.46.768},
journal = {Physical Review, C (Nuclear Physics); (United States)},
issn = {0556-2813},
number = ,
volume = 46:2,
place = {United States},
year = {1992},
month = {8}
}