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Hyperpolarized Xenon Nuclear Spins Detected by Optical ...

(nuclear-spin-1=2, magnetic moment 0:78 N, where N is the nuclear magneton) is particularly well suited for NMR and magnetic resonance imaging (MRI) studies for several reasons. It is possible to polarize it using the laser-optical-pumping techniques [1] to a de-gree that is orders of magnitude higher than what is

Optical Pumping - California Institute of Technology

using optical pumping, and we will do that in this lab. 1 Prelab I 1.1 Rubidium's atomic energy level structure Rubidium in its atomic state has just one valence electron and can be well approximated by a one-electron-atom model. Its nuclear properties are dif-ferent from Hydrogen, however, and this will give it a di erent energy-level structure.

OPTICAL PUMPING OF RUBIDIUM - Department of Physics

OPTICAL PUMPING OF RUBIDIUM . 1. INTRODUCTION Optical pumping [123] is a process used in high frequency spectroscopy, developed by A. Kastler who was awarded the Nobel Prize for this in 1966. In this experiment, anomalous Zeeman transitions in the ground state of . 87Rb and 85Rb with σ+- and σ--circular-polarized pumping light are observed

(PDF) Optical Pumping | Phillip Swann - Academia.edu

Optical pumping is in fact when you 'pump' electrons into a state which they would they would not normally be in without outside influences. Let me explain. Let's take an atom which has electrons with spin ±1/2, a circularly polarised light source and the earth's magnetic field is applied to the sample. ... Measurement of nuclear spin ...

Optical Pumping - University of Michigan

We will derive the rate equations for optical pumping of a sample of atoms using the model of an atom with no nuclear spin with energy levels illustrated in figure 1. A sample of atoms with concentration [N]is characterized by the concentrations of atoms in each magnetic sub level of the ground state [N +]

Nuclear spin cooling by helicity-alternated optical ...

The dynamics of the nuclear spin temperature under optical pumping is even more complex, because in this case nuclear spins interact with non-equilibrium electrons. It is known that the efficiency of nuclear spin cooling by circularly polarized light decreases when the degree of …

Optical Pumping - an overview | ScienceDirect Topics

The optical pumping process gives a nuclear polarization far above the polarization at thermal equilibrium. During the NMR experiments, each RF pulse destroys a part of this polarization, which cannot be recovered without returning the xenon to the optical pumping module.

(PDF) Bulk Nuclear Polarization Enhanced at Room ...

The magnified sketch shows the region at approximately 50 mT in which level anti-crossings occur in between the excited state sub-levels. (b) Simplified schematic description of the polarization transfer processes between the electronic and nuclear sub-states under optical pumping in the presence of the hyperfine interaction.

Universal nuclear focusing of confined electron spins ...

From optical pump-probe measurements, we find that mode-locking is absent for depolarized nuclear spins and emerges slowly (time scale of seconds) once the laser excitation pulse train is turned on.

Multiple-pulse nuclear magnetic resonance of optically ...

50 MULTIPLE-PULSE NUCLEAR MAGNETIC RESONANCE OF. .. 569 cal cells the average quadrupole interaction is inversely proportional to the cell height, and the NMR spectrum has a central transition at coo plus two satellites at No+COg. In a nutation experiment, the signal is observed at the nutation frequency co„and the new Hamiltonian is ob- tained by transforming Eq. (7) to the rotating frame

Optical Pumping - University of Michigan

Optical Pumping by Arnold L. Bloom, Scientific American, Oct. 1960, p 72 ; Optical Pumping by Robert L. de Zafra, American Journal of Physics, 28 (1960), pp 646-654 ; Optical Pumping Theory and Experiment by Reuben Benumof, American Journal of Physics, 33 (1966), p 151

Optical pumping magnetic resonance in high magnetic fields ...

the optical pumping phenomena has not been thoroughly ex-amined in multi-tesla magnetic fields. In this paper we de-scribe optical pumping of 129Xe via spin exchange at fields up to 7.04 T. By polarizing at high fields we show that129Xe nuclear spin polarization can be more efficiently produced in comparison to lower fields.

OPTICAL PUMPING - pdfs.semanticscholar.org

optical pumping, a general survey of the subject seems desirable. This book contains an elementary discussion of optical pumping techniques and theory suitable for physicists and chemists who wish an introduction to the subject. The first sections of the book describe what optical pumping is …

Optical Pumping of Rubidium Vapor - MIT

Optical Pumping of Rubidium Vapor Emily P. Wang MIT Department of Physics The technique of optical pumping is used to measure how the characteristic pumping time τ of Rb varies according to the temperature and intensity of the beam of irradiating photons. We found that τ decreased with increased beam intensity and increased with increased ...

(PDF) Effective collinear optical pumping for nuclear spin ...

Effective collinear optical pumping for nuclear spin polarization Article (PDF Available) in Journal of the Optical Society of America B 31(10) · October 2014 with 93 Reads DOI: 10.1364/JOSAB.31 ...

Hyperpolarization (physics) - Wikipedia

Aug 15, 2004· Hyperpolarization is the nuclear spin polarization of a material in a magnetic field far beyond thermal equilibrium conditions determined by the Boltzmann distribution. It can be applied to gases such as 129 Xe and 3 He, and small molecules where the polarization levels can be enhanced by a factor of 10 4-10 5 above thermal equilibrium levels. Hyperpolarized noble gases are typically used …

OPTICAL PUMPING EXPERIMENTS TO INCREASE THE …

existing nuclear polarization-enhancement techniques to NMR-based quantum-computer architectures. To this purpose xenon optical-pumping techniques have been applied to liquid-state NMR quantum computers and optical pumping of single-crystal silicon has been studied to address the requirements of an all-silicon NMR quantum-computer proposal.

Optical pumping and hyperpolarized spin relaxation

Dec 08, 2003· Optical pumping is to use light photons to polarize the atomic electron spins first and then the nuclear spins of noble gases get polarized through the spin exchange between atomic electron spins and nuclear spins. Using optical pumping nuclear spins of noble gases such as 3 He and 129 Xe can be polarized to 50% or higher, hundred thousand ...

Optical Pumping | Welcome to Physics 122

Modern optical pumping techniques were introduced by Alfred Kastler, a French Physicist who won the Nobel Prize in Physics in 1966 for his contributions. In this experiment you will explore optical pumping and its application to fundamental experiments in atomic physics.

Isotope shift of nuclear magnetic resonances in Xe and Xe ...

Optical pumping of cesium was alternately performed by the light of the left and right circular polarization; the pumping light intensity was ~ 10 mW. The precession of Xe nuclear moments was initiated with a π/2 pulse of a transverse resonant RF field. Switching of the pumping light polarization resulted in a change in the direction of ...

Theory of spin-exchange optical pumping of He and

Theory of spin-exchange optical pumping of 3He and 129Xe S. Appelt, A. Ben-Amar Baranga, C. J. Erickson, M. V. Romalis, A. R. Young, and W. Happer Joseph Henry Laboratory, Physics Department, Princeton University, Princeton, New Jersey 08544 ~Received 17 November 1997; revised manuscript received 23 April 1998!

Room-temperature in situ nuclear spin hyperpolarization ...

(a) Energy levels and transitions for an NV − centre in diamond. Optical pumping with green light at 532 nm induces transitions from the ground state spin-1 triplet to the excited triplet state.

RB Optical Pumping in Rubidium - Department of Physics

(10) one can determine the nuclear spin I. For a more complete discussion of optical pumping see the book "Optical Pumping" by Bernheim or the extensive review article of Skrotskii and Izyjumova in which 87Rb and 23Na** are discussed in detail. Safety Reminders • Be very careful not to drop or otherwise damage the rubidium vapour cell. It is ...

(PDF) Optical Pumping of Quantum-Dot Nuclear Spins

PDF | Hyperfine interactions with randomly oriented nuclear spins present a fundamental decoherence mechanism for electron spin in a quantum dot, that can be suppressed by polarizing the nuclear ...

Optical Pumping - MIT

A. Kastler discovered optical pumping in the 1950's and received the Nobel Prize for his work in 1966. In this experiment you will explore the phenomenon of op-tical pumping and its application to fundamental mea-surements in atomic and nuclear physics with equipment originally built for the Junior Lab shortly after the pub-

Dynamics of frequency-swept nuclear spin optical pumping ...

Feb 18, 2019· Abstract: A broad effort is underway to improve the sensitivity of nuclear magnetic resonance through the use of dynamic nuclear polarization. Nitrogen-vacancy (NV) centers in diamond offer an appealing platform because these paramagnetic defects can be optically polarized efficiently at room temperature.

Optical pumping of Rubidium - High Energy Physics

Optical pumping of Rubidium Dr. Johannes Recht and Dr. Werner Kiein Optical pumping is a process used in high frequency spectroscopy which was developed by A. Kastler. It allows the spectroscopy of atomic energy states in an energy region which is not accessible by means of direct, optical observation. Kastler was awarded the Nobel Prize

OPT - Optical Pumping - University of California, Berkeley

Optical Pumping of Rubidium Atoms, 85Rb and 87Rb; measurement of the nuclear spins Explore Magnetic Hyper ne Interactions of Rubidium Observe Zero-Field Transitions Con rm Breit-Rabi Equation Observe Double Quantum Transitions Study Rabi Oscillations Measure Optical Pumping pump up and pump down Times Study Temperature Dependence of Atomic ...

Laser pumping - Wikipedia

Laser pumping is the act of energy transfer from an external source into the gain medium of a laser. The energy is absorbed in the medium, producing excited states in its atoms. When the number of particles in one excited state exceeds the number of particles in the ground state or a less-excited state, population inversion is achieved.

Advanced Physics Lab Experiments | TeachSpin, Inc ...

Optical Pumping is a widely used and powerful technique for exploring atomic energy states, atomic transitions, and atomic collisions using electromagnetism in the form of light, radio frequency, and uniform constant magnetic fields. TeachSpin's Optical Pumping apparatus explores the atomic physics of both isotopes of natural rubidium.