Synthesis of new transuranium isotopes in multinucleon transfer reactions using a velocity filter
Synthesis of new transuranium isotopes in multinucleon transfer reactions using a velocity filter
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DOI：
10.1140/epja/i2016-16278-7
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发表时间：
2016-09
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通讯作者：
S. Heinz;H. M. Devaraja;O. Beliuskina;V. Comas;S. Hofmann;C. Hornung;G. Münzenberg;D. Ackermann;M. Gupta;R. Henderson;F. Heßberger;B. Kindler;B. Lommel;R. Mann;J. Maurer;K. Moody;K. Nishio;A. Popeko;D. Shaughnessy;M. Stoyer;A. Yeremin
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文献类型：
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作者：
S. Heinz;H. M. Devaraja;O. Beliuskina;V. Comas;S. Hofmann;C. Hornung;G. Münzenberg;D. Ackermann;M. Gupta;R. Henderson;F. Heßberger;B. Kindler;B. Lommel;R. Mann;J. Maurer;K. Moody;K. Nishio;A. Popeko;D. Shaughnessy;M. Stoyer;A. Yeremin
最近，我们报道了在48Ca+248Cm的低能碰撞中观察到的几种新的质子数同位素。其特点是这些核是在多核子转移反应中产生的，这种方法目前被认为是进入核素图上部迄今未知区域的一种可能的新方法。为了分离转移产物，我们使用了速度过滤器，即GSI发运的重离子反应产物分离器。由此产生的强烈的背景抑制使我们能够探测到横截面下至亚纳米尺度的原子核。除了新的同位素外，我们还鉴定了大约100个类似靶标的转移产物，并测定了它们的横截面。这一结果与以前的测量结果有力地表明，多核子转移反应是生产新的超铀同位素的可行途径。
Recently, we reported the observation of several new isotopes with proton numbersin low-energy collisions of48Ca +248Cm . The peculiarity is that the nuclei were produced in multinucleon transfer reactions, a method which is presently discussed as a possible new way to enter so far unknown regions in the upper part of the Chart of Nuclides. For separation of the transfer products we used a velocity filter, the Separator for Heavy Ion Reaction Products SHIP at GSI. The resulting strong background suppression allowed us to detect nuclei with cross-sections down to the sub-nanobarn scale. Beside the new isotopes we identified about 100 further target-like transfer products and determined their cross-sections. The results together with previous measurements strongly indicate that multinucleon transfer reactions are a viable pathway to the production of new transuranium isotopes.