Parity nonconservation in neutron resonances in {sup 133}Cs

Journal Article · Sun Feb 28 23:00:00 EST 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.59.1772· OSTI ID:322018

Sharapov, E I ^[1]; Bowman, J D; Knudson, J N; Penttilae, S I; Seestrom, S J; Yen, Y; Yuan, V W ^[2]; Crawford, B E; Roberson, N R ^[3]; Delheij, P P ^[4]; Haseyama, T; Masaike, A; Matsuda, Y ^[5]; Lowie, L Y; Mitchell, G E; Stephenson, S L ^[6]; Masuda, Y ^[7]; Postma, H ^[8]

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1. Joint Institute for Nuclear Research, 141980 Dubna (Russia)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Duke University, Durham, North Carolina 27708 and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 (United States)
4. TRIUMF, Vancouver, British Columbia, V6T 2A3 (CANADA)
5. Physics Department, Kyoto University, Kyoto 606-01 (Japan)
6. North Carolina State University, Raleigh, North Carolina 27695-8202 and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 (United States)
7. National Laboratory of High Energy Physics, Tsukuba-shi, 305 (Japan)
8. Delft University of Technology, Delft, 2600 GA (The Netherlands)

Spatial parity nonconservation (PNC) has been studied in the compound-nuclear states of {sup 134}Cs by measuring the helicity dependence of the neutron total cross section. Transmission measurements on a thick {sup 133}Cs target were performed by the time-of-flight method at the Manuel Lujan Neutron Scattering Center with a longitudinally polarized neutron beam in the energy range from 5 to 400 eV. A total of 28 new {ital p}-wave resonances were found, their neutron widths determined, and the PNC longitudinal asymmetries of the resonance cross sections measured. The value obtained for the root-mean-square PNC element M=(0.06{sub {minus}0.02}{sup +0.25}) meV in {sup 133}Cs is the smallest among all targets studied. This value corresponds to a weak spreading width {Gamma}{sub w}=(0.006{sub {minus}0.003}{sup +0.154}){times}10{sup {minus}7} eV. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 322018
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 59; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CESIUM 133 TARGET
COMPOUND NUCLEI
HELICITY
NEUTRON REACTIONS
P INVARIANCE
PARITY
TIME-OF-FLIGHT METHOD