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*âγ+7Li(g.s.)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
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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*âγ+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 αPâodd10B=+(0.8±3.9)Ã10-8; “zero” experiments are taken into account. Using this value, we constrain the weak neutral current constant in the framework of the cluster model to fÏ10Bâ¤2.4Ã10-7 (at 90% c.l.). This constraint does not contradict the estimation obtained from the nuclear reaction 6Li(n,α)3H: fÏ6Liâ¤1.1Ã10-7 (at 90% c.l.). However, both these constraints contradict the “best” value of the Quark model by Desplanques, Donoughe, and Holstein fÏDDH=4.6Ã10-7.
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 2â3, 1â11 December 2009, Pages 244-247
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 611, Issues 2â3, 1â11 December 2009, Pages 244-247
نویسندگان
V.A. Vesna, Yu.M. Gledenov, V.V. Nesvizhevsky, A.K. Petukhov, P.V. Sedyshev, E.V. Shul'gina,