The hyperfine structure of they 8 p-multiplet of 4f 7(8 S) 6s 6p in EuI

Abstract

The hyperfine splitting constants of the 4f 7 6s 6p y 8P7[ 2 level of EuI were determined using the level crossing method. These values and those for the hyperfine splittings of the other 4f 7 6s 6p levels are compared to theoretical values calculated with eigenfunctions of Smith and Collins. For the quadrupole coupling constants a better agreement between theory and experiment is obtained if different (r-a)p-parameters are assumed for 4f7(8S) 6s 6p(aP) and for 4f7(8S) 6s 6p(1P),

A high resolution study of the transitions 4f 76s 2?4f 76s6p in the Eu I-spectrum

“…The hfs in the configuration 4f76s6p of 151Eu has been analyzed with effective operator techniques by Lange [6] and Champeau et al [7] for the A and B factors respectively, using the wave functions from Smith et al [10] which take into account interactions with the configurations 4f 7 5d6p and 4f65d6s 2. In Tables 1 and 2 the results of their theoretical calculations are given.…”

“…The transitions from the ground state 4f 7 6S 2 8S of 7, '2 europium I to the levels of the configuration 4f76s6p have been subject of many spectroscopic investigations. As early as 1935 Schiiler and Schmidt [1] determined from the hyperfine structure (hfs) of some of the transitions the nuclear ground state spins of both stable isotopes 151 and 153 (natural abundances 47.8 ~i and 52.2 ~ to be I = 5/2.…”

Hyperfine Anomaly in Eu Isotopes and the Universiability of the Moskowitz–Lombardi Formula

“…Europium has been subject to many investigations since the measurements of Schüler and Schmidt in 1935 [14]. Since then, many measurements have been performed using a variety of different methods, for example; Fabry-Perot spectroscopy [15], atomic beam magnetic resonance [16], level crossing spectroscopy [17], laser atomic beam spectroscopy [18,19], laser-rfdouble resonance [20], and in an ion trap [21]. In total, the hfs has been determined in over 30 atomic states and 15 states in Eu + .…”

Laser-atomic-beam spectroscopy of 4f 75d6s?4f 75d6p transitions in Eu I

“…This leads to R(5d)~ -0.3 in the middle of the rare-earth region where Eu is located. With R(4f)=0.10(5) [43], R(5d)=-0.44 (9) is obtained. Child's experimental data were reanalysed by Bauche-Arnoult et al using improved wavefunctions [44].…”

“…This interest arises mainly from the fact that the spectra of Eu I and II are relatively simple compared to the spectra of most other rare earths so that hyperfine structure (hfs) and isotope shift (IS) of the two stable isotopes ~lEu and 153Eu as well as finer effects like hyperfine (hi) anomaly and core polarization can be studied in a reliable way. Interferometric [1,[3][4][5][6][7][8] and level crossing techniques [9,10] have been used as well as laser-atomic-beam spectroscopy [11,12]. The transitions from the ground state to levels of the configuration 4f76s6p have been the subject of many spectroscopic investigations.…”