Quantum-state-dependent decay rates of electrostatically trapped Rydberg NO molecules.
Quantum-state-dependent decay rates of electrostatically trapped Rydberg NO molecules.
复制标题
DOI：
10.1039/d1cp01930a
复制
发表时间：
2021-09-14
期刊：
影响因子：
--
通讯作者：
Hogan SD
中科院分区：
文献类型：
--
作者：
Rayment MH;Hogan SD
在脉冲超音速束中行进的一氧化氮 (NO) 分子已通过共振增强双色双光子激发从 X 2Π1/2 (v′′ = 0, J′′ = 3/2) 基态通过 A 2Σ+ (v′ = 0, N′ = 0, J′ = 1/2) 中间态制备成长寿命的里德堡-斯塔克态。这些激发的分子从 795 ms−1 减速，静止在实验室固定参考系中，即传输线里德伯-斯塔克减速器的移动电陷阱中。减速器在 30 K 下运行，以最大限度地减少减速和捕获过程中黑体辐射对分子的影响。这些分子被静电捕获长达 1 毫秒的时间，并通过脉冲电场电离进行原位检测。对来自陷阱的衰变速率的测量是针对主量子数在 n = 32 和 50 之间的状态进行的，在收敛到 NO+ 的 N+= 0、1 和 2 旋转状态的里德伯级数中。对于研究的里德堡态范围，通常观察到随着 n 值的增加，测量到的 200 μs 和 400 μs 之间的衰减时间会减少。对于某些特定的 n 值，可以看到与此趋势的偏差。借助数值计算，这些观察结果被解释为旋转和振动通道相互作用对 1 kHz 数量级的衰减率的贡献的结果。这些结果为弱分子内相互作用对 NO 中长寿命里德伯态缓慢衰变的作用提供了新的线索。高里德伯态的一氧化氮分子已被减速并被静电捕获在基于芯片的里德伯-斯塔克减速器中。测量的陷阱衰变率为小分子中里德伯态的缓慢衰变过程提供了新的线索。
Nitric oxide (NO) molecules travelling in pulsed supersonic beams have been prepared in long-lived Rydberg–Stark states by resonance-enhanced two-colour two-photon excitation from the X 2Π1/2 (v′′ = 0, J′′ = 3/2) ground state, through the A 2Σ+ (v′ = 0, N′ = 0, J′ = 1/2) intermediate state. These excited molecules were decelerated from 795 ms−1 to rest in the laboratory-fixed frame of reference, in the travelling electric traps of a transmission-line Rydberg–Stark decelerator. The decelerator was operated at 30 K to minimise effects of blackbody radiation on the molecules during deceleration and trapping. The molecules were electrostatically trapped for times of up to 1 ms, and detected in situ by pulsed electric field ionisation. Measurements of the rate of decay from the trap were performed for states with principal quantum numbers between n = 32 and 50, in Rydberg series converging to the N+= 0, 1, and 2 rotational states of NO+. For the range of Rydberg states studied, the measured decay times of between 200 μs and 400 μs were generally observed to reduce as the value of n was increased. For some particular values of n deviations from this trend were seen. These observations are interpreted, with the aid of numerical calculations, to arise as a result of contributions to the decay rates, on the order of 1 kHz, from rotational and vibrational channel interactions. These results shed new light on the role of weak intramolecular interactions on the slow decay of long-lived Rydberg states in NO. Nitric oxide molecules in high Rydberg states have been decelerated and electrostatically trapped in a chip-based Rydberg–Stark decelerator. Measured trap decay rates shed new light on slow decay processes of Rydberg states in small molecules.
登录
查看更多内容
影响因子：
2.9
作者：
Allmendinger, Pitt;Deiglmayr, Johannes;Merkt, Frederic
通讯作者：
Merkt, Frederic
影响因子：
64.8
作者：
Bendkowsky, Vera;Butscher, Bjoern;Pfau, Tilman
通讯作者：
Pfau, Tilman
影响因子：
4.4
作者：
BIERNACKI, DT;COLSON, SD;EYLER, EE
通讯作者：
EYLER, EE
影响因子：
8.6
作者：
Deller, A.;Hogan, S. D.
通讯作者：
Hogan, S. D.
DOI：
10.1088/0022-3700/13/19/025
发表时间：
1980-01-01
影响因子：
1.6
作者：
GIUSTI, A
通讯作者：
GIUSTI, A