The bandstructure of the copperoxide-plane including the singlet band

1991 ◽  
Vol 85 (2) ◽  
pp. 169-173 ◽  
Author(s):  
R. Hayn
Keyword(s):  
Singlet Band

EXCEPTIONAL STRUCTURES IN THE ODD-ODD NUCLEUS 250Md

2000 ◽  
Vol 09 (04) ◽  
pp. 309-317 ◽  
Author(s):  
P. C. SOOD ◽  
M. SAINATH ◽  
K. VENKATARAMANIAH
Keyword(s):  
Rare Earth ◽  
Energy Spectrum ◽  
Ground State ◽  
Low Energy ◽  
Α Decay ◽  
Decay Modes ◽  
Proton Interaction ◽  
Zero Range ◽  
Singlet Band ◽  
Rare Earth Nucleus

The low-energy two-quasiparticle bandhead energies for the odd-odd Z=101 nucleus 250 Md are evaluated using a zero range residual neutron-proton interaction. The 250Md ground state is seen to have the spin-parity Iπ=0- corresponding to the singlet band from the configuration {p : 7/2[514]⊗n:7/2[624]} in violation of the Gallagher-Moszkowski (GM) coupling rule. The situation here is shown to be almost identical to that for the rare-earth nucleus 166 Ho , which is the only well-established exception to the GM rule known so far. Analysis of the expected low energy spectrum, including the rotational levels, for 250 Md reveals the occurrence of an as-yet-unobserved long-lived high-spin Iπ = 7- isomeric state around (80±30) keV with dominant ε and α decay modes.

The absorption spectrum of gaseous aluminium monofluoride in the Schumann region

1954 ◽  
Vol 224 (1156) ◽  
pp. 134-140 ◽  
Keyword(s):  
Absorption Spectrum ◽  
Excited States ◽  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Singlet Band

The absorption spectrum of gaseous aluminium monofluoride has been examined in the region 1250 to 2000 Ǻ. Six new singlet band-systems have been found. Four of the excited states have also been observed in emission in transitions to the lowest excited singlet state A 1 п, at longer wave-lengths. The energies and products of dissociation of some of the states are considered.

Excitation spectrum of the near-ultraviolet bands of CS2

1980 ◽  
Vol 58 (5) ◽  
pp. 454-457 ◽  
Author(s):  
R. Vasudev ◽  
J. C. D. Brand
Keyword(s):  
Excitation Spectrum ◽  
Spontaneous Emission ◽  
Ground State ◽  
Band System ◽  
Tunable Laser ◽  
Laser Source ◽  
Intersystem Crossing ◽  
Near Ultraviolet ◽  
Resonance Emission ◽  
Singlet Band

An excitation spectrum of the triplet–singlet band system of CS2 vapor has been measured in the range 365–378 nm using a tunable laser source. Overall intensity is relatively insensitive to pressure in the range (150 m Torr – 340 Torr) tested in these observations. The results indicate that collisions with ground state molecules of CS2 are efficient in promoting intersystem crossing to the ground state, and that the spontaneous emission observed is primarily resonance emission from the state populated by the radiation.

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