Parity nonconservation for neutron resonances in sup 238 U

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.768· OSTI ID:7035107

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 ^[1]

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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)

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.

• DOE Contract Number: FG05-88ER40441; FG05-91ER40619; W-7405-ENG-36
• OSTI ID: 7035107
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 46:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
663590 -- Nuclear Mass Ranges-- A=220 & Above-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BARYONS
CROSS SECTIONS
ELEMENTARY PARTICLES
EPITHERMAL NEUTRONS
FERMIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
INVARIANCE PRINCIPLES
MATRIX ELEMENTS
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
P INVARIANCE
PARTICLE INTERACTIONS
RESONANCE SCATTERING
SCATTERING
SYMMETRY BREAKING
TARGETS
TOTAL CROSS SECTIONS
URANIUM 238 TARGET