Spin - Resolved Photoionisation of Lead Above the Pb ' ( 6 s 26 p ) * P , , , - ThreshoId
نویسنده
چکیده
The spin-polarisation parameters for photoelectrons from lead atoms (6?6p2)J,0 were measured in the wavelength range between the second threshold [Pb+ (6s26p) 2P3i2] and 100 nm in an angle-resolving experiment using circularly polarised vuv-radiation from the storage ring BESSY. Beyond this threshold (2 = 135.3 nm), the photoionisation cross section is strongly perturbed by autoionisation resonances. Especially, a strong enhancement of the generally weak Pb+ (6s26p) 2P,,2 photoionisation cross section occurs. Theoretical calculations by Radojevic [ 151 attribute these resonances to the 6s6p3-configuration of lead. By use of the measured spin-polarisation parameters A , 5 and a which show pronounced variations in the region investigated for both final ionic states zP,12 and 2P,,2 a detailed discussion of the resonances is performed.
منابع مشابه
Large Rashba spin splitting of a metallic surface-state band on a semiconductor surface
The generation of spin-polarized electrons at room temperature is an essential step in developing semiconductor spintronic applications. To this end, we studied the electronic states of a Ge(111) surface, covered with a lead monolayer at a fractional coverage of 4 / 3, by angleresolved photoelectron spectroscopy (ARPES), spin-resolved ARPES and fi rst-principles electronic structure calculation...
متن کاملKnight Shifts and Band Structure in Lead Telluride by Helicon-nuclear-spin Interaction
Using the helicon nuclear-spin interaction we have detected NMR in the bulk of lead telluride single crystals. In p-type material, the 207Pb resonance has been studied in detail. The Knight shift of 207Pb in y-type PbTe is strong and negative, indicating a negative g11 value. The gll value at the band edge and the electron density on the Pb site are determined. The wave functions at the valence...
متن کاملP-6: Protective Effects of Green Tea Extract on Lead-induced Damage in Mouse Testis
Background: Lead is a heavy metal that has been known for its adverse effects on many body organs and systems and. In the present study, the protective effect of green tea (GTE) on the male reproductive system following the administration of lead (pb) was investigated. Materials and Methods: Forty male NMRI mice were divided into four groups of 10 animals each. Controls, GTE treated, pb treated...
متن کاملP-135: The Protective Effect of Green Tea Extract on Lead-Induced Oxidative Stress, Apoptosis and Morphometric Changes in Male Mouse Epididymis
Background: Lead (Pb) is one of the most important environmental pollutants that affect the male reproductive system. The aim of this study was to investigate the protective effect of green tea extract on lead-induced oxidative stress, apoptosis and morphometric changes in male mouse epididymis. Materials and Methods: Forty adult male mice were randomly divided into four groups (n= 10), as foll...
متن کاملBis[O-isopropyl (4-ethoxyphenyl)dithiophosphonato-κ2 S,S′]lead(II)
The title compound, [Pb(C11H16O2PS2)2], is a neutral four-coordinate mononuclear complex with a distorted square-pyramidal geometry of the PbS4 core. The apical Pb(II) atom of each pyramid is 1.33059 (3) Å above the basal S4 plane. The metal atom is surrounded by two chelating dithio-phospho-nate ligands binding through the S-donor atoms. The ligands are anisobidentate as the pyramid is compris...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006