کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1839630 | 1527247 | 2006 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pionic fusion study of the 6He halo
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The halo nucleus 6He has been studied in a pionic fusion experiment at the CELSIUS ring in Uppsala. The aim of the experiment was to investigate, in particular, the high-momentum part of the halo wave function by measuring the differential cross section for the 4He(d,â6He)Ï+ reaction 0.6, 1.2 and 5.0 MeV above threshold in the centre-of-mass frame. The 6He ions were detected in a ÎEâE solid-state detector telescope inserted into the ring vacuum. The result for the total cross section is, respectively, 22(1), 38(1) and 57(9) nb with a common systematic uncertainty of ±35%. The differential cross section is clearly anisotropic: [dÏdΩ(0°)âdÏdΩ(180°)]/[dÏdΩ(0°)+dÏdΩ(180°)]=â0.25(5), â0.29(5) and â0.35(15) at the same three energies. The preferred direction of emission for the pion is parallel to the momentum of the 4He ion in the initial state. In terms of a simple model for the reaction the results depend sensitively on the state of motion of the centre of mass of the halo relative to that of the core.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics A - Volume 779, 27 November 2006, Pages 47-62
Journal: Nuclear Physics A - Volume 779, 27 November 2006, Pages 47-62
نویسندگان
M. Andersson, Chr. Bargholtz, Kj. Fransson, E. Fumero, L. Gerén, L. Holmberg, K. Lindh, L. MÃ¥rtensson, I. Sitnikova, P.-E. Tegnér, G. Weiss, K. Wilhelmsen,