标题： 从$^{44}$Ti 的阿尔法衰变：使用归一化谱学因子的微观阿尔法半衰期计算 显示英文标题

标题： Alpha-decay from $^{44}$Ti: Microscopic alpha half-life calculation using normalized spectroscopic factor

摘要： 从核子自由度出发，对α衰变的微观描述涉及一个两步过程。 第一步是中子和质子对的团簇化；第二步涉及隧穿过程。 建立了一个稳健的协议来计算由Fliessbach定义的归一化谱学因子及其误差，并用于计算核素$^{44}$Ti的$0^+$态的α宽度。 使用Gamow壳模型计算α衰变的结构部分，而Gamow波函数确定反应部分。 对$^{44}$Ti的基态和激发态$0^+$的常规和归一化谱学因子进行了计算，以及激发态的α宽度和半衰期。 一个接近α阈值的状态具有5$\mu$秒的α半衰期。 归一化不会显著改变基态的团簇化，而激发态则会。 非共振连续体显著增加了某些激发态的团簇化，特别是$T=2$态。 归一化的形成幅度看起来像一个单粒子波函数。 显示英文摘要

摘要： The microscopic description of alpha decay from the nucleons' degree of freedom involves a two-step process. The first consists of the clusterization of neutron and proton pairs; the second involves the tunneling process. A robust protocol for calculating the normalized spectroscopic factor, as defined by Fliessbach, and its error is established and used for calculating the alpha-width for the $0^+$ states of the nucleus $^{44}$Ti. The Gamow Shell Model is used to calculate the structure part of the alpha-decay, while the Gamow wave function determines the reaction part. The conventional and normalized spectroscopic factors are calculated for the ground and excited $0^+$ states of $^{44}$Ti and the alpha-width and half-life of the excited states. A near alpha-threshold state has an alpha half-life of 5 $\mu$sec. The normalization does not appreciably modify the ground-state clusterization, while the excited states do. The non-resonant continuum significantly increases the clustering of some of the excited states, particularly the $T=2$ state. The normalized formation amplitude looks like a single-particle wave function.