A Caltech Library Service

Enhanced Yield from a Cryogenic Buffer Gas Beam Source via Excited State Chemistry

Jadbabaie, Arian and Pilgram, Nickolas H. and Kłos, Jacek and Kotochigova, Svetlana and Hutzler, Nicholas R. (2019) Enhanced Yield from a Cryogenic Buffer Gas Beam Source via Excited State Chemistry. . (Unpublished)

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We use narrow-band laser excitation of Yb to substantially enhance the brightness of a cold beam of YbOH, a polyatomic molecule with high sensitivity to physics beyond the Standard Model (BSM). By exciting atomic Yb to the metastable ³P₁ state in a cryogenic environment, we significantly increase the chemical reaction cross-section for collisions of Yb with reactants. We characterize the dependence of the enhancement on the properties of the laser light, and study the final state distribution of the YbOH products. The resulting bright, cold YbOH beam can be used to increase the statistical sensitivity in searches for new physics utilizing YbOH, such as electron electric dipole moment (eEDM) and nuclear magnetic quadrupole moment (NMQM) experiments. We also perform new quantum chemical calculations that confirm the enhanced reactivity observed in our experiment. Additionally, our calculations compare reaction pathways of Yb(³P) with the reactants H₂O and H₂O₂. More generally, our work presents a broad approach for improving experiments that use cryogenic molecular beams for laser cooling and precision measurement searches of BSM physics.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Jadbabaie, Arian0000-0002-7606-5586
Pilgram, Nickolas H.0000-0002-5467-3783
Hutzler, Nicholas R.0000-0002-5203-3635
Additional Information:We thank the PolyEDM collaboration for insightful discussions, especially Amar Vutha, Tim Steimle, John Doyle, and the Doyle Group at Harvard. We also thank Tim Steimle for providing the lines used for spectroscopy of YbOH, Avikar Periwal for his assistance fabricating the CBGB source, Yi Zeng for assistance with the lasers, and Elizabeth West, Xiaomei Zeng, and Katherine Faber for assistance with fabricating the ablation targets. AJ thanks Ashay Patel for helpful discussions. Work at Caltech is supported by the Heising-Simons Foundation, the NSF CAREER Award #PHY-1847550, and NIST Precision Measurement Grant #60NANB18D253. Work at Temple University is supported by the Army Research Office Grant #W911NF-17-1-0563, the U.S. Air Force Office of Scientific Research Grant #FA9550-14-1-0321 and the NSF Grant #PHY-1908634.
Funding AgencyGrant Number
Heising-Simons FoundationUNSPECIFIED
National Institute of Standards and Technology (NIST)60NANB18D253
Army Research Office (ARO)W911NF-17-1-0563
Air Force Office of Scientific Research (AFOSR)FA9550-14-1-0321
Record Number:CaltechAUTHORS:20191218-113347116
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100350
Deposited By: Tony Diaz
Deposited On:18 Dec 2019 19:43
Last Modified:12 Jul 2021 17:29

Repository Staff Only: item control page