Fine-structure wavelength measurements in two-electron phosphorus and calcium

Thesis/Dissertation · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5007723

Hinterlong, S J

The wavelengths of two n = 2 state fine-structure transitions have been measured for the first time in helium-like phosphorus (Z = 15) and calcium (Z = 20). The two transitions, 1s2s/sup 3/S/sub 1/ - 1s2p/sup 3/P/sub 2/ and 1s2s/sup 3/S/sub 1/ - 1s2p/sup 3/P/sub 2/, were studied in P/sup 13 +/ and Ca/sup 18 +/ by means of fast-ion spectroscopy. All observations were carried out in a vacuum ultraviolet spectral region using a one meter normal incidence monochromator and windowless photon detector. The wavelengths of these /sup 3/S - /sup 3/P transitions exhibit large contributions due to relativistic as well as quantum electrodynamic effects in the atomic structure. Precise measurements of the two transition wavelengths in phosphorus and calcium allow detailed investigation of these contributions in highly-ionized two-electron ions. Comparison of the measured wavelengths with recent calculations shows good consistency. The measured wavelengths values for the transitions are, in phosphorus (/sup 3/S/sub 1/ - /sup 3/P/sub 8/):813.16 +/- 0.05 A, (/sup 3/S/sub 1/ - /sup 3/P/sub 2/):739.98 +/- 0.02 A; in calcium (/sup 3/S/sub 1/ - /sup 3/P/sub 2/):466.78 +/- 0.08 A.

• Research Organization: Notre Dame Univ., IN (USA)
• OSTI ID: 5007723
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CALCIUM
ENERGY-LEVEL TRANSITIONS
PHOSPHORUS
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
FAR ULTRAVIOLET RADIATION
FINE STRUCTURE
ION SPECTROSCOPY
WAVELENGTHS
ALKALINE EARTH METALS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
INFORMATION
METALS
NONMETALS
NUMERICAL DATA
RADIATIONS
SPECTROSCOPY
ULTRAVIOLET RADIATION
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory