在放射性核束次级反应中发现$^{68}$ Br
Discovery of $^{68}$Br in secondary reactions of radioactive beams
摘要：
富含质子的同位素68 Br是在快速放射性核束的次级碎裂反应中发现的。由RIKEN Nishina中心产生并由BigRIPS碎片分离器识别的70，71，72Kr和70Br的富含质子的次级束撞击次级9Be靶。利用零度光谱仪实现了对次级目标后面的非生物性粒子的识别。基于预期的直接生产截面从邻近的同位素，地面或长寿命的同质异能态的68 Br的寿命进行了估计。结果表明，次级碎裂反应，其中相对较少的核子从抛射体中移除，提供了另一种寻找新同位素的方法，因为这些反应优先填充低位状态。
英文摘要：
The proton-rich isotope 68Br was discovered in secondary fragmentation reactions of fast radioactive beams. Proton-rich secondary beams of 70,71,72Kr and 70Br, produced at the RIKEN Nishina Center and identified by the BigRIPS fragment separator, impinged on a secondary 9Be target. Unambiguous particle identification behind the secondary target was achieved with the ZeroDegree spectrometer. Based on the expected direct production cross sections from neighboring isotopes, the lifetime of the ground or long-lived isomeric state of 68Br was estimated. The results suggest that secondary fragmentation reactions, where relatively few nucleons are removed from the projectile, offer an alternative way to search for new isotopes, as these reactions populate preferentially low-lying states.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
