Abstract
We report on spectroscopic measurements on the
4
f
7
6
s
2
8
S
7
/
2
∘
→
4
f
7
(
8
S
∘
)
6
s
6
p
(
1
P
∘
)
8
P
9
/
2
transition in neutral europium-151
and europium-153 at 459.4 nm. The center of gravity frequencies for
the 151 and 153 isotopes, reported for the first time in this paper,
to our knowledge, were found to be 652,389,757.16(34) MHz and
652,386,593.2(5) MHz, respectively. The hyperfine coefficients for the
6
s
6
p
(
1
P
∘
)
8
P
9
/
2
state were found to be
A
(
151
)
=
−
228.84
(
2
)
M
H
z
,
B
(
151
)
=
226.9
(
5
)
M
H
z
and
A
(
153
)
=
−
101.87
(
6
)
M
H
z
,
B
(
153
)
=
575.4
(
1.5
)
M
H
z
, which all agree with previously
published results except for A(153), which shows a small discrepancy.
The isotope shift is found to be 3163.8(6) MHz, which also has a
discrepancy with previously published results.
Funder
Directorate for Mathematical and Physical
Sciences
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics
Cited by
1 articles.
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