تقرير
Inverse-kinematics one-neutron pickup with fast rare-isotope beams
| العنوان: | Inverse-kinematics one-neutron pickup with fast rare-isotope beams |
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| المؤلفون: | Gade, A., Tostevin, J. A., Baugher, T., Bazin, D., Brown, B. A., Campbell, C. M., Glasmacher, T., Grinyer, G. F., McDaniel, S., Meierbachtol, K., Ratkiewicz, A., Stroberg, S. R., Walsh, K. A., Weisshaar, D., Winkler, R. |
| المصدر: | Phys.Rev.C83:054324,2011 |
| سنة النشر: | 2011 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | New measurements and reaction model calculations are reported for single neutron pickup reactions onto a fast \nuc{22}{Mg} secondary beam at 84 MeV per nucleon. Measurements were made on both carbon and beryllium targets, having very different structures, allowing a first investigation of the likely nature of the pickup reaction mechanism. The measurements involve thick reaction targets and $\gamma$-ray spectroscopy of the projectile-like reaction residue for final-state resolution, that permit experiments with low incident beam rates compared to traditional low-energy transfer reactions. From measured longitudinal momentum distributions we show that the $\nuc{12}{C} (\nuc{22}{Mg},\nuc{23}{Mg}+\gamma)X$ reaction largely proceeds as a direct two-body reaction, the neutron transfer producing bound \nuc{11}{C} target residues. The corresponding reaction on the \nuc{9}{Be} target seems to largely leave the \nuc{8}{Be} residual nucleus unbound at excitation energies high in the continuum. We discuss the possible use of such fast-beam one-neutron pickup reactions to track single-particle strength in exotic nuclei, and also their expected sensitivity to neutron high-$\ell$ (intruder) states which are often direct indicators of shell evolution and the disappearance of magic numbers in the exotic regime. Comment: 8 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.83.054324 |
| URL الوصول: | http://arxiv.org/abs/1103.3849 |
| رقم الأكسشن: | edsarx.1103.3849 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.83.054324 |
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