【作者】 宁远航； 黄浩； 徐海； 樊政； 郑沄； 葛美华； 郑雨军； 孙振东；

【Author】 NING Yuan-hang;HUANG Hao;XU Hai;FAN Zheng;ZHENG Yun;GE Mei-hua;ZHENG Yu-jun;SUN Zhen-dong;School of Physics,Shandong University;

【机构】 山东大学物理学院；

【摘要】 按照量子力学中的泡利原理,所有分子,当其中相同原子的原子核的自旋不为零时,都具有不同的原子核自旋变体。分子的原子核自旋变体有相同的化学元素和结构但可能有许多不同的物理性质,例如这些原子核自旋变体的寺命有多长等一些基本而有趣的问题。对此,我们以分子的精密激光光谱测量为基本手段,在将多原子分子甲醇的正和仲甲醇核自旋变体实现了它们在空间上的分离后,将它们在其存在的寺命时间内储存起来的同时,尝试着对它们向其自然的热平衡态转化的实时过程进行了现象观测。我们还对其可能的转换机制作了有益的探讨,并认为量子弛豫过程应是甲醇分子的原子核自旋变体间转换的主要机制。更多还原

【Abstract】 All molecules possessing identical nuclei with nonzero spin,in accordance with the Pauli principle in quantum mechanics,have distinct nuclear spin isomers.Although they have the same chemical element and structure,they may have many different properties in physics.Such as how long the lifetimes of the nuclear spin isomers should be Questions like this should be interesting in answering.We have utilized the precision measurement of laser spectroscopy of molecules as an experimental tool to study the nuclear spin isomers of the polyatomic molecule of methanol.When we have made the separation of the nuclear spin isomers of methanol,we have simultaneously stored it in an isolated cell in which the nuclear spin isomers from their nonequilibrium distribution will relax back to their initial natural state of population after a certain time.In addition,we have tried both to make observation to such processes and to explain the observed phenomena.We think that the quantum relaxation may be responsible to the main conversion mechanism of nuclear spin isomers of methanol.更多还原