In the present work, we present extensive new data on thallium
employing multi-photon and multi-step excitation techniques in
conjunction with a thermionic diode ion detector. A number of
different excitation paths have been used. The first experiment
addresses the observation of odd- parity levels np 2P1/2,3/2 and np
2F5/2 using two- photon excitation from the ground state. In the
second set of experiments we employed a two-step excitation scheme
using 6s2 7s 2S1/2 intermediate level and observed the np 2P1/2,3/2
levels upto n = 56. The even-parity levels have also been excited
using three-photon excitation from the ground state revealing ns
2S1/2 and np 2P3/2,5/2 levels. In the subsequent experiments, we
used a two-color three- photon excitation technique to approach the
ns 2S1/2 and nd 2D3/2 levels using 7p 2P1/2 as an intermediate
level. The nd series have been extended upto n = 65 and it is
noticed that the intensity of the high Rydberg series scales as
1/n2.8. However, the np 2P1/2,3/2 series, which have been observed
upto n = 56 scale as 1/n2.3 in contrast to the scaling law of 1/n3
for an unperturbed Rydberg series.
General
Imprint: |
Lap Lambert Academic Publishing
|
Country of origin: |
Germany |
Release date: |
November 2010 |
First published: |
November 2010 |
Authors: |
Riaz Muhammad
|
Dimensions: |
229 x 152 x 6mm (L x W x T) |
Format: |
Paperback - Trade
|
Pages: |
104 |
ISBN-13: |
978-3-8433-5409-7 |
Categories: |
Books >
Science & Mathematics >
Physics >
General
|
LSN: |
3-8433-5409-X |
Barcode: |
9783843354097 |
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