Parity nonconservation in neutron resonances in {sup 133}Cs

Journal Article · Mon Mar 01 00:00:00 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, Vol. 59, Issue 3; Other Information: PBD: Mar 1999
• Country of Publication: United States
• Language: English

Related Subjects

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