Parity violation in neutron resonances in {sup 107,109}Ag

Journal Article · Sun Jan 31 23:00:00 EST 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.59.1119· OSTI ID:304286

Lowie, L Y; Mitchell, G E; Stephenson, S L ^[1]; Bowman, J D; Frankle, C M; Knudson, J N; Penttilae, S I; Seestrom, S J; Yen, Y; Yuan, V W ^[2]; Corvi, F; Zanini, L ^[3]; Crawford, B E; Roberson, N R ^[4]; Delheij, P P ^[5]; Iinuma, M; Masaike, A; Matsuda, Y; Shimizu, H M ^[6]; Masuda, Y ^[7] ; Postma, H ^[8]; Sharapov, E I ^[9]

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

Parity nonconservation (PNC) was studied in {ital p}-wave resonances in Ag by measuring the helicity dependence of the neutron total cross section. Transmission measurements on natural Ag were performed in the energy range 32 to 422 eV with the time-of-flight method at the Manuel Lujan Neutron Scattering Center at Los Alamos National Laboratory. A total of 15 {ital p}-wave neutron resonances were studied in {sup 107}Ag and nine {ital p}-wave resonances in {sup 109}Ag. Statistically significant asymmetries were observed for eight resonances in {sup 107}Ag and for four resonances in {sup 109}Ag. An analysis treating the PNC matrix elements as random variables yields a weak spreading width of {Gamma}{sub w}=(2.67{sub {minus}1.21}{sup +2.65}){times}10{sup {minus}7} eV for {sup 107}Ag and {Gamma}{sub w}=(1.30{sub {minus}0.74}{sup +2.49}){times}10{sup {minus}7} eV for {sup 109}Ag. thinsp {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 304286
• 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
NEUTRON REACTIONS
P INVARIANCE
P WAVES
PARITY
RESONANCE SCATTERING
SILVER 107 TARGET
SILVER 109 TARGET
TOTAL CROSS SECTIONS