کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10724126 1033913 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
First lifetime measurement of 21+ state in 12Be
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
First lifetime measurement of 21+ state in 12Be
چکیده انگلیسی
The lifetime of the 21+ state at 2.1 MeV in 12Be has been measured using inelastic scattering of a 12Be beam at 43 MeV/nucleon with a gold target. Through the Doppler shift attenuation method, the mean-life of the 21+ state has been determined as 2.5±0.7 (stat) ±0.3 (syst) ps, which gives a B(E2;21+→0g.s.+) value of 4.9±1.3±0.5 in Weisskopf units. The result shows a large quadrupole strength in the ground state transition, providing further evidence on the disappearance of the N=8 magic number. The B(E2;21+→0g.s.+) value together with the deformation length measured by proton inelastic scattering yields a neutron quadrupole matrix element two times larger than those for 14C and 16O.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 673, Issue 3, 23 March 2009, Pages 179-182
نویسندگان
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