کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10724391 | 1033969 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the magnitude of the 8Li + 4He â 11B + n reaction cross section at the Big-Bang temperature
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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
![عکس صفحه اول مقاله: On the magnitude of the 8Li + 4He â 11B + n reaction cross section at the Big-Bang temperature On the magnitude of the 8Li + 4He â 11B + n reaction cross section at the Big-Bang temperature](/preview/png/10724391.png)
چکیده انگلیسی
The 8Li + 4He â 11B + n reaction at Ecm<2 MeV is a process of relevant astrophysical interest for which a remarkable experimental discrepancy between inclusive and exclusive cross-section measurements exists. In this Letter, a new inclusive neutron measurement at Ecm=1.05±0.16 MeV is given. The radioactive 8Li beam was delivered by the EXCYT facility. The cross section was determined by a low-background measurement of the time correlation between the 8Li projectile arrival to the target and the following neutron capture in a threshold-less 4Ï thermalization counter. This new data strengthens the reliability of the previous inclusive reaction cross-section data and altogether are consistent with a significant population of 11B levels at high excitation energy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 664, Issue 3, 19 June 2008, Pages 157-161
Journal: Physics Letters B - Volume 664, Issue 3, 19 June 2008, Pages 157-161
نویسندگان
M. La Cognata, A. Del Zoppo, P. Figuera, A. Musumarra, R. Alba, S. Cherubini, N. Colonna, L. Cosentino, V. Crucillà , A. Di Pietro, M. Gulino, L. Lamia, M.G. Pellegriti, R.G. Pizzone, S.M.R. Puglia, G.G. Rapisarda, C. Rolfs, S. Romano, A. Tumino,