Upper Limit for the Lifetimes of Excited States ofNi60

1955 ◽  
Vol 97 (2) ◽  
pp. 561-563 ◽  
Author(s):  
Z. Bay ◽  
V. P. Henri ◽  
F. McLernon
Keyword(s):  
Excited States ◽  
Upper Limit

The radiation-induced formation of excited states of aromatic hydrocarbons in alicyclic hydrocarbons I. Yields of excited singlet and triplet state solute molecules

1975 ◽  
Vol 347 (1648) ◽  
pp. 61-73 ◽  
Keyword(s):  
Energy Transfer ◽  
Excited States ◽  
Pulse Radiolysis ◽  
Minor Role ◽  
Intersystem Crossing ◽  
Excited Singlet ◽  
Excited Triplet ◽  
Upper Limit ◽  
Radiation Induced ◽  
A Minor

The dependences on concentration of the yield of excited triplet naphthalene, G ( 3 Naph٭), and of the radiation-induced fluorescence obtained on pulse radiolysis of solutions of naphthalene in cyclopentane, cyclooctane and decalin are reported. The yields of singlet excited naphthalene, G( 1 Naph٭), formed on pulse radiolysis of these solutions have been determined by comparing the intensity of the radiation-induced fluorescence with that obtained on photo excitation and the extent of formation of 3 Naph٭ by intersystem crossing, G ( 3 Naph٭) i. s. c., is assessed. Upper limit yields of solvent excited states, G ( 1 RH٭), were determined by measuring the extent of singlet energy transfer to toluene. It is concluded that energy transfer from solvent excited states plays a minor role in the formation of excited states of aromatic solutes.

REACTION OF N2(A3∑U+) WITH ATOMIC NITROGEN

1966 ◽  
Vol 44 (10) ◽  
pp. 1171-1174 ◽  
Author(s):  
Robert A. Young
Keyword(s):  
Excited States ◽  
Rate Coefficient ◽  
Atomic Nitrogen ◽  
Active Nitrogen ◽  
Upper Limit ◽  
Interchange Process

Attempts to measure the actual lifetime of N2(A3∑u+) in active nitrogen resulted only in a very small upper limit of ≈5 × 10−4 s. This result is consistent with quenching of the A3∑u+ state by atomic nitrogen in an atom–atom interchange process,[Formula: see text]having a rate coefficient of [Formula: see text] It is suggested that similar processes are involved in determining the distribution of excited states observed in atom association.

scholarly journals SiO Masers in the Star Forming Regions W51 IRS2 and Sgr B2 MD5

1987 ◽  
Vol 115 ◽  
pp. 178-178
Author(s):  
N. Ukita ◽  
T. Hasegawa ◽  
N. Kaifu ◽  
K.-I. Morita ◽  
S. Okumura ◽  
...  
Keyword(s):  
Star Formation ◽  
Excited States ◽  
Line Intensity ◽  
Massive Star ◽  
Massive Star Formation ◽  
Vibrationally Excited ◽  
Maser Emission ◽  
Star Forming ◽  
Star Forming Regions ◽  
Upper Limit

The maser emission of the J = 1-0 lines of SiO in vibrationally excited states has been detected in two regions of massive star formation, W51 IRS2 and Sgr B2 MD5. The SiO masers apparently coincide with strong H2O masers in each source within the uncertainties of < 5″. Their velocity ranges fall within those of the nearest H2O masers (Figure 1). In W51 IRS2 the maser emission is observed only in the v = 2 state, and the upper limit of the v = 1 line (3σ) is 1/15th of the v = 2 line intensity. The v = 1 emission found in Sgr B2 MD5 is five times stronger than the marginally detected v = 2 emission (Figure 2). Their luminosities are comparable to those from the corresponding maser in Orion.

scholarly journals A study on the transition between seniority-type and collective excitations in 204Po and 206Po

2018 ◽  
Vol 194 ◽  
pp. 03002 ◽  
Author(s):  
Milena Stoyanova ◽  
Georgi Rainovski ◽  
Jan Jolie ◽  
Norbert Pietralla ◽  
Andrey Blazhev ◽  
...  
Keyword(s):  
Excited States ◽  
Collective Excitations ◽  
Preliminary Results ◽  
Fast Timing ◽  
Upper Limit ◽  
Systematic Behavior ◽  
The University ◽  
Fusion Evaporation Reactions

Low-lying yrast states in 204Po and 206Po have been investigated by the γ-γ fast timing technique with LaBr3(Ce) detectors. Excited states of these nuclei were populated in the 197Au(11B,4n) and the 198Pt(12C,4n) fusion-evaporation reactions, respectively, at the FN-Tandem Facility at the University of Cologne. The lifetimes of the 4+1 states in both nuclei were measured, along with an upper limit for the 2+1 state in 204Po. The preliminary results are discussed in the scope of the systematic behavior of the transition strengths between yrast states in polonium isotopes.

Vuv Spectra Y to Mo

1988 ◽  
Vol 102 ◽  
pp. 239
Author(s):  
M.S.Z. Chaghtai
Keyword(s):  
Excited States ◽  
Spectral Analyses ◽  
Vuv Spectra

Using R.D. Cowan’s computations (1979) and parametric calculations of Meinders et al (1982), old analyses are thoroughly revised and extended at Aligarh, of Zr III by Khan et al (1981), of Nb IV by Shujauddin et Chaghtai (1985), of Mo V by Tauheed at al (1985). Cabeza et al (1986) confirmed the last one largely.Extensive studies have been reported of the 1–e spectra, Zr IV (Rahimullah et al 1980; Acquista and Reader 1980), Nb V (Shujauddin et al 1982; Kagan et al 1981) and Mo VI (Edlén et al 1985). Some interacting 4p54d2levels of these spectra have been reported from our laboratory, also.Detailed spectral analyses of transitions between excited states have furnished complete energy values for J ≠ 1 levels of these spectra during 1970s and 80s. Shujauddin et al (1982) have worked out Nb VI and Tauheed et al (1984) Mo VII from our lab, while Khan et al (1981) share the work on Zr V with Reader and Acquista (1979).

Excited states of nuclei in -coupling

Physica ◽  
1952 ◽  
Vol 18 (2) ◽  
pp. 1101-1104
Author(s):  
B FLOWERS
Keyword(s):  
Excited States
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