Parity nonconservation for neutron resonances in sup 238 U

Journal Article · Sat Aug 01 00:00:00 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), Vol. 46:2; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

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-)