论文标题
$β$ -DECAY半衰期的55个中子富含同位素超出n = 82壳间隙
$β$-Decay Half-Lives of 55 Neutron-Rich Isotopes beyond the N=82 Shell Gap
论文作者
论文摘要
55个富含中子的核的$β$ -decay半衰期，$^{134-139} $ sn，$^{134-142} $ sb，$^{137-144} $ te，$^{140-146} $^{148-153} $ ba，$^{151-155} $ la在使用$^{238} $ u的弹丸裂变片段的放射性同位素束工厂（RIBF）中测量。与变形有关的核水平结构对半衰期有很大的影响。在$ r $工艺核合成的背景下，研究了新测量的半衰期对重型元素的天体物理起源建模的影响。对于各种各样的天体物理条件，包括发生裂变回收的条件，半衰期对第二个（$ a $ $ \ $ \ $ 130）的峰产生了重要的局部影响。
The $β$-decay half-lives of 55 neutron-rich nuclei $^{134-139}$Sn, $^{134-142}$Sb, $^{137-144}$Te, $^{140-146}$I, $^{142-148}$Xe, $^{145-151}$Cs, $^{148-153}$Ba, $^{151-155}$La were measured at the Radioactive Isotope Beam Factory (RIBF) employing the projectile fission fragments of $^{238}$U. The nuclear level structure, which relates to deformation, has a large effect on the half-lives. The impact of newly-measured half-lives on modeling the astrophysical origin of the heavy elements is studied in the context of $r$ process nucleosynthesis. For a wide variety of astrophysical conditions, including those in which fission recycling occurs, the half-lives have an important local impact on the second ($A$ $\approx$ 130) peak.
