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CAS IR Grid
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长春光学精密机械与物... [1]
上海应用物理研究所 [1]
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会议论文 [1]
学位论文 [1]
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2017 [1]
2004 [1]
1991 [1]
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高能实验物理 [1]
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Optical oscillator strengths of the valence-shell excitations of atoms and molecules determined by the dipole (gamma, gamma) method
期刊论文
OAI收割
EUROPEAN PHYSICAL JOURNAL D, 2017, 卷号: 71, 期号: 7, 页码: -
作者:
Xu, LQ
;
Liu, YW
;
Xu, X
;
Ni, DD
;
Yang, K
  |  
收藏
  |  
浏览/下载:207/0
  |  
提交时间:2018/08/30
Radiative Lifetimes
Electron-impact
High-resolution
Cross-sections
Neutral Helium
Co Molecule
F-values
He Atom
S-p
Transitions
Rare-earth doped tungsten tellurite glasses and waveguides: Fabrication and characterization (EI CONFERENCE)
会议论文
OAI收割
Physics of Non-Crystalline Solids 10, October 15, 2004 - October 15, 2004, Parma, Italy
作者:
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  |  
浏览/下载:28/0
  |  
提交时间:2013/03/25
Tungsten tellurite glasses doped with Er3+
Tm3+
Pr3+
and Ho3+ ions were prepared by melt quenching. The glass matrix was the same for all types of glasses and had a high sodium content in order to allow the fabrication of waveguides using an ion-exchange technique. The absorption spectra of the glasses were measured and the Judd-Ofelt parameters q were obtained from the experimental oscillator strengths of the f &rarr f transitions. Er3+ doped glasses showed a very high quantum efficiency when comparing the calculated radiative decay time with the measured lifetime of the 4I 13/2 metastable level. Ag+ Na+ ion-exchanged planar waveguides were successfully obtained in all types of glasses and characterized by the prism coupling technique. It turned out that the diffusion constant values are very similar for glasses containing different rare-earth ions with the same concentration
while
at least for the Er 3+ doped ones
the diffusion constant changes with the ions concentration. 2004 Elsevier B.V. All rights reserved.
硕士论文-J/ψ衰变到2(pai+pai-)°p和2(K+K-)终态的强衰变研究
学位论文
OAI收割
硕士, 北京: 中国科学院研究生院, 1991
作者:
陈少敏
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浏览/下载:23/0
  |  
提交时间:2015/10/12
The
J/Ψ
hadronic
decays
involving
2(π+π-)π°and
2(K+K-)
final
states
are
investigated
by
using
the
sample
of
2.5
*
10~6
J/Ψ's
which
were
obtained
from
the
BES
detector
at
BEPC
in
the
first
half
of
1990.
Some
signals
such
as
ω(782)
φ(1020)
f2(1270)
f2'(1525)
θ/f2(1720)
b1(1235)
and
a2(1320)
have
been
found
and
measured
the
mass
width
and
branching
fraction
of
reasonance
states.
The
results
are
agreement
with
the
world
average
values.
The
ratio
of
Br(J/Ψ
→
ω
f2(1270))/Br(J/Ψ→ρ°a2°)
shows
that
doubly
OZI
violating
effects
play
a
role
in
the
J/Ψ
→
ω
f2(1270)
f2(1270)
→
π+π-
are
given
in
the
first
time:
x
=
0.99
±
0.29
Y
=
-0.24
±
0.17
Z1
=
0.90
±
0.57
Z2
=
0.56
±
0.22.