Measurement of the 4 sup 2 S sub 1/2 -4 sup 2 F sub 5/2 three-photon transition in He sup + : A new test of QED

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6996725

Majumder, P K

Utilizing the separated oscillatory fields technique, the feasibility of multiphoton spectroscopy for precision measurements of hydrogenic fine structure has been demonstrated. The three photon {sup 2}S{sub {1/2}}-{sup 2}F{sub 5/2} transition in He{sup +} (n = 4) has been measured with a precision of 5 ppm. Our result is, {Delta}E({sup 2}F{sub 5/2}-{sup 2}S{sub {1/2}}) = 27 446.529(127) MHz. By subtracting the very known {sup 2}P{sub {1/2}}-{sup 2}F{sub 5/2} fine structure interval, the resulting prediction for the He{sup +} (n = 4) Lamb shift is, L(He{sup +}(n = 4)) = 1 768.695(127) MHz. This 72 ppm indirect Lamb shift measurement surpasses the precision of any previous measurement of a hydrogenic Lamb shift outside of the metastable n = 2 manifold. Thus, the present measurement is best viewed as the most precise experimental prediction to date concerning the higher order binding correction, G{sub SE} ({Zeta}{alpha}) to the 4S state in He{sup +}.

• Research Organization: Harvard Univ., Boston, MA (USA)
• OSTI ID: 6996725
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CALCULATION METHODS
CHARGED PARTICLES
DATA
DATA ANALYSIS
ELECTRODYNAMICS
ELEMENTS
EXPERIMENTAL DATA
FIELD THEORIES
FINE STRUCTURE
HELIUM IONS
HYDROGEN
INFORMATION
IONS
LAMB SHIFT
MEASURING INSTRUMENTS
MEASURING METHODS
MULTI-PHOTON PROCESSES
NONMETALS
NUMERICAL DATA
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
SPECTRAL SHIFT
SPECTROSCOPY