Search for parity violation in {sup 93}Nb neutron resonances

Journal Article · Mon Feb 01 04:00:00 EST 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.59.1131· OSTI ID:304287

Sharapov, E I ^[1]; Bowman, J D; Frankle, C M; 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]; Fukuda, K ^[5]; Iinuma, M; Masaike, A; Matsuda, Y; Shimizu, H M ^[6]; Lokitz, S J; Lowie, L Y; Mitchell, G E; Stephenson, S L ^[7] ; Masuda, Y ^[8]; Postma, H ^[9]

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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. Meiji College of Oriental Medicine, Kyoto (Japan)
6. Department of Physics, Kyoto University, Kyoto 606-01 (Japan)
7. North Carolina State University, Raleigh, North Carolina 27695-8202 and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 (United States)
8. National Laboratory of High Energy Physics, Tsukuba-shi, 305 (Japan)
9. Delft University of Technology, Delft, 2600 GA (The Netherlands)

A new search has been performed for parity violation in the compound nuclear states of {sup 94}Nb by measuring the helicity dependence of the neutron total cross section. Transmission measurements on a thick niobium 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 32 to 1000 eV. A total of 18 {ital p}-wave resonances in {sup 93}Nb were studied with none exhibiting a statistically significant parity-violating longitudinal asymmetry. An upper limit of 1.0{times}10{sup {minus}7} eV (95{percent} confidence level) was obtained for the weak spreading width {Gamma}{sub w} in {sup 93}Nb. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 304287
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 59; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
HELICITY
NEUTRON REACTIONS
NIOBIUM 93 TARGET
P INVARIANCE
PARITY
RESONANCE SCATTERING
TOTAL CROSS SECTIONS