Multistage Zeeman deceleration of NH 
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Plomp, Vikram; Zhi, Gao; Cremers, Theo; Meerakker, Sebastiaan Y. T. van de

doi:10.1103/physreva.99.033417

Cited by 21 publications

(20 citation statements)

References 71 publications

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“…Recently, we reported an alternative 1 + 2′ REMPI scheme . In this scheme, we first resonantly excite NH to the A 3 Π state via the strong A ← X transition around 336 nm.…”

Section: Resultsmentioning

confidence: 99%

Low-Energy Collisions of Zeeman-Decelerated NH Radicals with He Atoms

Plomp¹,

Lique

Meerakker³

2023

J. Phys. Chem. A

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We report an experimental study of state-to-state inelastic scattering of NH (X 3 Σ − , N = 0, j = 1) radicals with He atoms. Using a crossed molecular beam apparatus that combines a Zeeman decelerator and velocity map imaging, we study both integral and differential cross sections in the N = 0, j = 1 → N = 2, j = 3 inelastic channel. We developed various new REMPI schemes to state-selectively detect NH radicals, and tested their performance in terms of sensitivity and ion recoil velocity. We found a 1 + 2′ + 1′ REMPI scheme using the A 3 Π ← X 3 Σ − resonant transition, which yields acceptable recoil velocities and is more than an order of magnitude more sensitive than conventional onecolor REMPI schemes to detect NH. We used this REMPI scheme to probe state-to-state integral and differential cross sections around the channel opening at 97.7 cm −1 , as well as at higher energies where structure in the scattering images could be resolved. The experimental results are in excellent agreement with the predictions from quantum scattering calculations which are based on an ab initio NH-He potential energy surface.

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“…Recently, we reported an alternative 1 + 2′ REMPI scheme . In this scheme, we first resonantly excite NH to the A 3 Π state via the strong A ← X transition around 336 nm.…”

Section: Resultsmentioning

confidence: 99%

Low-Energy Collisions of Zeeman-Decelerated NH Radicals with He Atoms

Plomp¹,

Lique

Meerakker³

2023

J. Phys. Chem. A

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“…Initially, it is set such that the velocity of the potential wells match with the speed of the inputting molecular beam, and is then gradually swept down, resulting in the deceleration and ultimately stopping of both the wells and the molecules in it. Since the wires can be cooled with liquid, the current of the coil can be applied to as high as 5000A 51 and this value will be used throughout the following discussions unless otherwise stated.…”

Section: Concept and Designmentioning

confidence: 99%

Ring-shaped traveling wave Zeeman decelerator for both light and heavy molecules

Ji¹,

Liu²,

Liu³

et al. 2023

Preprint

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Taming more species of molecules with large density is a long-standing goal in molecular science. Heavy molecule (> 100 amu) is of particular interest for precision measurements. However, decelerating a fast-moving beam of heavy molecules to rest remains challenging for Zeeman deceleration. Additionally, the traditional approach of pulsed Zeeman decelerator suffers from serious molecular loss during deceleration, significantly limiting its potential applications. Herein, we present a ring-shaped traveling wave Zeeman decelerator (RTWZD) featured with true three-dimensional smoothly-moving magnetic potential wells that directly solve the above intractable problems. With this approach, not only the density of the molecule can be greatly increased but also the range of molecular species for Zeeman deceleration can be extended from light to heavy. The performance of the RTWZD is characterized with both the theoretical analysis and the numerical calculation, where a group of atoms and molecules such as 7Li, 32O2, 88Sr19F and 174Yb19F are employed as testers. Losses in the traditional Zeeman decelerator can be avoided, yielding more than two orders of magnitude improvement in molecular density. These characteristics of the RTWZD make it an ideal toolbox to produce cold and dense atomic/molecular samples, enabling promising prospects for cold collision, sympathetic cooling, and precision measurement.

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“…Methods based on the deceleration of supersonic molecular beams are particularly well suited for collision experiments since the final longitudinal velocity of the sample can be tuned over a wide range with narrow velocity spreads [6,14,15,16,17,18,19,20]. In this context, the Zeeman deceleration method relies on the state-dependent interaction of neutral paramagnetic atoms or molecules with time-dependent inhomogeneous magnetic fields [21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37] and is thus suitable for open-shell systems such as molecular radicals or metastable atoms and molecules [38,6,5].…”

Section: Introductionmentioning

confidence: 99%

A New Design for a Traveling-Wave Zeeman Decelerator: I. Theory

Damjanovic,

Willitsch,

Vanhaecke

et al. 2021

Preprint

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The concept of a novel traveling wave Zeeman deccelerator based on a double-helix wire geometry capable of decelerating paramagnetic species with high efficiency is presented. A moving magnetic trap is created by running time-dependent currents through the decelerator coils. Paramagnetic species in low-field-seeking Zeeman states are confined in the moving traps and transported to the end of the decelerator with programmable velocities. Here, we present the theoretical foundations underlying the working principle of the traveling-trap decelerator. Using trajectory simulations, we characterise the performance of the new device and explore the conditions for phase-space stability of the transported molecules.

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Multistage Zeeman deceleration of NH XΣ−3 radicals

Cited by 21 publications

References 71 publications

Low-Energy Collisions of Zeeman-Decelerated NH Radicals with He Atoms

Low-Energy Collisions of Zeeman-Decelerated NH Radicals with He Atoms

Ring-shaped traveling wave Zeeman decelerator for both light and heavy molecules

A New Design for a Traveling-Wave Zeeman Decelerator: I. Theory

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