ISSN:
1434-601X
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract The natural width of the strong Fe I spectral lineλ=3719,9 Å was determined in a double resonance experiment with an atomic beam as resonance cell and a hollow cathode as light source by the observation ofrf-induced magnetic dipole transitions between the Zeeman sublevels of the excited state in a weak static magnetic fieldH 0. The optical line was isolated from disturbing neighbours in the same multiplet either roughly by an interference filter or strictly by a monochromator. From the widthΔν=5,35(14) MHz of the double resonance signal (monochromator value, including a small correction of 1.5% for the hyperfine structure of the 2.2% natural abundance of iron-57) the lifetimeτ of the (z 5 F 5 0 )-level is found to beτ=5,95 (16)×10−8 sec. Thef-value of the transition to the ground state (a 5 D 4) is calculated, by using the known relativef-values for the weak alternative transition possibilities to the (a 4 F 5) and (a 5 F 4) levels (λ=5012 and 5127 Å), to bef λ3720=4,21 (11)×10−2.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01395620
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