کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1827014 1526473 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurement of P-odd asymmetry of γ-quanta emission in the nuclear reaction 10B(n,α)7Li*→γ+7Li(g.s.)
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Measurement of P-odd asymmetry of γ-quanta emission in the nuclear reaction 10B(n,α)7Li*→γ+7Li(g.s.)
چکیده انگلیسی
We present results of measurement of the P-odd asymmetry αP-odd of γ-quanta emission in the nuclear reaction 10B(n,α)7Li*→γ+7Li(g.s.) with polarized cold neutrons. The experiment was carried out using a new version of the integral measuring method. The frequency of neutron spin-flip is higher in this method than the typical reactor power noise frequency; this condition decreases experimental uncertainties. The result is αP‐odd10B=+(0.8±3.9)×10-8; “zero” experiments are taken into account. Using this value, we constrain the weak neutral current constant in the framework of the cluster model to fπ10B≤2.4×10-7 (at 90% c.l.). This constraint does not contradict the estimation obtained from the nuclear reaction 6Li(n,α)3H: fπ6Li≤1.1×10-7 (at 90% c.l.). However, both these constraints contradict the “best” value of the Quark model by Desplanques, Donoughe, and Holstein fπDDH=4.6×10-7.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 611, Issues 2–3, 1–11 December 2009, Pages 244-247
نویسندگان
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