Parity violation in neutron resonances in 115In
Identifieur interne : 000A97 ( Russie/Analysis ); précédent : 000A96; suivant : 000A98Parity violation in neutron resonances in 115In
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Abstract
Parity nonconservation (PNC) was studied in p-wave resonances in indium by measuring the helicity dependence of the neutron total cross section in the neutron energy range 6.0-316 eV with the time-of-flight method at LANSCE. A total of 36 p-wave neutron resonances were studied in 115In, and statistically significant asymmetries were observed for nine cases. An analysis treating the PNC matrix elements as random variables yields a weak matrix element of M=(0.67-0.12+0.16) meV and a weak spreading width of Γw=(1.30-0.43+0.76)×10-7 eV.
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Experimental study</term>
<term>Helicity</term>
<term>Indium 115 target</term>
<term>Matrix elements</term>
<term>Neutron reactions</term>
<term>Neutron-nucleus scattering</term>
<term>Nuclear resonance scattering</term>
<term>Nuclei with mass number 90 to 149</term>
<term>P invariance</term>
<term>P waves</term>
<term>Parity</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>2480</term>
<term>2540N</term>
<term>2760</term>
<term>1130E</term>
<term>Etude expérimentale</term>
<term>Réaction neutron</term>
<term>Parité</term>
<term>Invariance P</term>
<term>Onde P</term>
<term>Cible indium 115</term>
<term>Hélicité</term>
<term>Elément matriciel</term>
<term>Diffusion neutron noyau</term>
<term>Diffusion résonance nucléaire</term>
<term>Nombre masse noyau 90-149</term>
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<front><div type="abstract" xml:lang="en">Parity nonconservation (PNC) was studied in p-wave resonances in indium by measuring the helicity dependence of the neutron total cross section in the neutron energy range 6.0-316 eV with the time-of-flight method at LANSCE. A total of 36 p-wave neutron resonances were studied in <sup>115</sup>
In, and statistically significant asymmetries were observed for nine cases. An analysis treating the PNC matrix elements as random variables yields a weak matrix element of M=(0.67<sub>-0.12</sub>
<sup>+0.16</sup>
) meV and a weak spreading width of Γ<sub>w</sub>
=(1.30<sub>-0.43</sub>
<sup>+0.76</sup>
)×10<sup>-7</sup>
eV.</div>
</front>
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<fA08 i1="01" i2="1" l="ENG"><s1>Parity violation in neutron resonances in <sup>115</sup>
In</s1>
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<sZ>19 aut.</sZ>
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<fA14 i1="08"><s1>Delft University of Technology, IRI/ISO, 2629 JB, Delft, the Netherlands</s1>
<sZ>15 aut.</sZ>
</fA14>
<fA14 i1="09"><s1>Joint Institute for Nuclear Research, 141980 Dubna, Russia</s1>
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<fC01 i1="01" l="ENG"><s0>Parity nonconservation (PNC) was studied in p-wave resonances in indium by measuring the helicity dependence of the neutron total cross section in the neutron energy range 6.0-316 eV with the time-of-flight method at LANSCE. A total of 36 p-wave neutron resonances were studied in <sup>115</sup>
In, and statistically significant asymmetries were observed for nine cases. An analysis treating the PNC matrix elements as random variables yields a weak matrix element of M=(0.67<sub>-0.12</sub>
<sup>+0.16</sup>
) meV and a weak spreading width of Γ<sub>w</sub>
=(1.30<sub>-0.43</sub>
<sup>+0.76</sup>
)×10<sup>-7</sup>
eV.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B20D80</s0>
</fC02>
<fC02 i1="02" i2="3"><s0>001B20E40N</s0>
</fC02>
<fC02 i1="03" i2="3"><s0>001B20G60</s0>
</fC02>
<fC02 i1="04" i2="3"><s0>001B10A30E</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE"><s0>2480</s0>
<s2>PAC</s2>
<s4>INC</s4>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>2540N</s0>
<s2>PAC</s2>
<s4>INC</s4>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>2760</s0>
<s2>PAC</s2>
<s4>INC</s4>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>1130E</s0>
<s2>PAC</s2>
<s4>INC</s4>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Etude expérimentale</s0>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Experimental study</s0>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Réaction neutron</s0>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Neutron reactions</s0>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Parité</s0>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Parity</s0>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Invariance P</s0>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>P invariance</s0>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Onde P</s0>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>P waves</s0>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Cible indium 115</s0>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Indium 115 target</s0>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Hélicité</s0>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Helicity</s0>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Elément matriciel</s0>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Matrix elements</s0>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Diffusion neutron noyau</s0>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Neutron-nucleus scattering</s0>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Diffusion résonance nucléaire</s0>
</fC03>
<fC03 i1="14" i2="3" l="ENG"><s0>Nuclear resonance scattering</s0>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Nombre masse noyau 90-149</s0>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Nuclei with mass number 90 to 149</s0>
</fC03>
<fN21><s1>094</s1>
</fN21>
<fN47 i1="01" i2="1"><s0>0013M000664</s0>
</fN47>
</pA>
</standard>
</inist>
</record>
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