Experimental determination of the density matrix describing collisionally produced H(<i>n=3</i>) atoms

Havener, C. C.; Rouze, Ned C.; Westerveld, W. B.; Risley, and J. S.

doi:10.1103/physreva.33.276

Cited by 54 publications

(18 citation statements)

References 35 publications

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“…This is in agreement with the other measurements [-3, 4]. It is to be noted that the electron lags behind the proton in collision with He gas target for all incident proton energy ranging from 20 to 100 keV for n=3 state [8,9]. In H + -He collision at incident energies of 5-25 keV, an electron of H(n=2) trails behind the proton, while in H-He collision the electron is rideing in front of the proton [21].…”

Section: Discussionsupporting

confidence: 93%

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Stark beats of Lyman-α emission of foil-excited hydrogen atom

Ishii

Nakajima

Masui

et al. 1992

Z Phys D - Atoms, Molecules and Clusters

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Abstract. The Stark beats of Lyman-e emission due to n = i -2 transition of hydrogen atom have been studied by the beam-foil method. After passage through a thin carbon foil, the static electric field of 500 V/cm was applied to the beam in the direction either parallel to or anti-parallel to the the beam velocity. The linearly polarized emission was measured by using a toroidal mirror at a Brewster's angle reflection. When the direction of the applied electric field is reversed, an appreciable phase shift was observed. The analysis of the data leads to the complete determination of the density matrix of the H(n = 2) atoms at the time of their production.

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Section: Discussionsupporting

confidence: 93%

“…The density matrix of n = 3 state formed in collisions of protons with gas target was studied extensively by Havener et al [8] and Ashburn et al [9]. They have observed the intensity and polarization of Balmer-~ radiation emitted by decaying atoms as a function of the strength of axial and transverse electric field to the proton beam.…”

Section: Introductionmentioning

confidence: 98%

Stark beats of Lyman-α emission of foil-excited hydrogen atom

Ishii

Nakajima

Masui

et al. 1992

Z Phys D - Atoms, Molecules and Clusters

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show abstract

“…Finally, experiments for reconstructing the angular momentum density matrix of electrons in hydrogen atoms from measurements of the Stark structure of the emitted light have been reported (Havener, Rouze, Westerveld and Risley [1986]; Ashburn, Cline, Stone, van der Burgt, Westerveld and Risley [1989]; Ashburn, Cline, van der Burgt, Westerveld and Risley [1990]; Cline, van der Burgt, Westerveld and Risley [1990]; Renwick, Martell, Weaver and Risley [1993]; Seifert, Gibson and Risley [1995]). In the experiments, the density matrix is considered for the manifold of states of principal quantum number n = 3 and n = 2, the matrix elements being parametrized by the orbital and magnetic quantum numbers l and m respectively.…”

Section: Spin and Angular Momentum Systemsmentioning

confidence: 99%

II Homodyne Detection and Quantum-State Reconstruction

1999

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“…First we discuss the integrated (over b ) density matrices and their first-order moments for both the capture and target excitation cases as they are more readily determined experimentally (Havener et al 1986). manifolds.…”

Section: Integrated Density Matrices and Multipole Momentsmentioning

confidence: 99%

Density matrices of the n=2 and 3 manifolds of H atoms produced in p-H collisions at 1-50 keV impact energies

Lin

Fritsch

1988

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. We study the full density matrices (differential as well as integrated with respect to impact parameter) for charge transfer and excitation to the n = 2 and 3 manifolds of the excited hydrogen atoms formed in p-H collisions over impact energies 1-50 keV. The scattering amplitudes are determined using the modified two-centre atomic-orbitalexpansion method (ao+) based on the impact parameter formalism. From these scattering amplitudes several physical parameters such as the dipole moment, velocity vector, charge density and current distribution are extracted. The analysis of these parameters allows us to provide an approximate classical orbital picture for excitation and charge transfer to each manifold at both the low ( E < 5 keV) and intermediate ( E > 20 keV) energy regions.In general, we can interpret the charge distribution around each centre after the collision as resulting from the electron cloud being pulled apart between the two collision centres as they move away from each other. Comparison is also made with the electron charge density for the n = 2 manifold of H in electron-hydrogen and positron-hydrogen impact excitations at 50-200 eV using the calculation of van Wyngaarden and Walters.

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Experimental determination of the density matrix describing collisionally produced H(n=3) atoms

Cited by 54 publications

References 35 publications

Stark beats of Lyman-α emission of foil-excited hydrogen atom

Stark beats of Lyman-α emission of foil-excited hydrogen atom

II Homodyne Detection and Quantum-State Reconstruction

Density matrices of the n=2 and 3 manifolds of H atoms produced in p-H collisions at 1-50 keV impact energies

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