Low lying levels in 81Br

1969 ◽  
Vol 47 (20) ◽  
pp. 2255-2259 ◽  
Author(s):  
M. Salomon ◽  
C. Hojvat
Keyword(s):  
Excited State ◽  
Energy Level ◽  
Excited States ◽  
Ground State ◽  
Level Scheme ◽  
Coulomb Excitation ◽  
Transition Probability ◽  
Energy Level Scheme ◽  
First Excited State

Coulomb excitation of Br targets and the reaction 80Se(p,γ)81Br were used to populate the low lying excited states of 81Br and an energy level scheme is proposed. The reduced transition probability from the ground state to the first excited state of 81Br (276 keV) has been measured to be B(E2) = 410 ± 40 e2 f4.

scholarly journals Electric Quadrupole Excitation of the First Excited State of 11B

1980 ◽  
Vol 33 (3) ◽  
pp. 505 ◽  
Author(s):  
MP Fewell ◽  
RH Spear ◽  
TH Zabel ◽  
AM Baxter
Keyword(s):  
Excited State ◽  
Ground State ◽  
Coulomb Excitation ◽  
Transition Probability ◽  
Electric Quadrupole ◽  
Core Excitation ◽  
The Core ◽  
Model Predictions ◽  
First Excited State ◽  
Excitation Model

The Coulomb excitation of backscattered llB projectiles has been used to measure the reduced E2 transition probability B(E2; 3/2--+ 1/2-) between the 3/2- ground state and the 1/2- first excited state of llB. It is found that B(E2;3/2--+1/2-) = 2�1�0�4 e2 fm4, which agrees with shell model predictions but is a factor of 10 larger than the prediction of the core-excitation model.

scholarly journals GDR Contribution to Coulomb Excitation. II. 17O

1982 ◽  
Vol 35 (3) ◽  
pp. 301 ◽  
Author(s):  
FC Barker
Keyword(s):  
Excited State ◽  
Shell Model ◽  
Excited States ◽  
Giant Dipole Resonance ◽  
Coulomb Excitation ◽  
Dipole Resonance ◽  
First Excited State ◽  
Virtual Excitation

The contribution to the Coulomb excitation of the first excited state of 170 due to virtual excitation of the giant dipole resonance (GDR) is calculated, using shell model wavefunctions for the ground and first excited states. A large value is obtained.

THE SPIN OF THE 3.70-MEV LEVEL IN Al25

1963 ◽  
Vol 41 (6) ◽  
pp. 923-931 ◽  
Author(s):  
G. J. McCallum
Keyword(s):  
Angular Distribution ◽  
Excited State ◽  
Band Structure ◽  
Ground State ◽  
Transition Probability ◽  
Spin Assignment ◽  
Mixing Ratio ◽  
Excitation Radiation ◽  
Rotational Bands ◽  
First Excited State

The 3.70-Mev level in Al25 has been studied by means of the reaction Mg24(p, γ)Al25 at the 1.49-Mev resonance. Direct angular distribution measurements of the de-excitation gamma radiation support the spin assignment of 7/2− for this level. An E2/M1 amplitude mixing ratio of −0.55 ± 0.2 is found for the 1.79-Mev de-excitation radiation from the fourth excited state to the ground state of Al25. The ratio of the reduced transition probability of the E2 radiation from the 1.79-Mev level to the first excited state is shown to be ~30 times that to the ground state. This result provides further confirmation of rotational band structure in Al25 since the collective model predicts such an enhancement of E2 transitions between rotational bands whereas cross-band transitions are not expected to be enhanced.

Extensions to the spark spectra of zinc. I. Zinc II and zinc IV

1968 ◽  
Vol 46 (10) ◽  
pp. 1241-1251 ◽  
Author(s):  
A. M. Crooker ◽  
K. A. Dick
Keyword(s):  
Energy Level ◽  
Ground State ◽  
Level Scheme ◽  
Energy Levels ◽  
Spectral Lines ◽  
Energy Level Scheme ◽  
New Energy ◽  
Ground State Doublet

The spectrum of Zn II has been extended to complete the configuration 3d94s(3D)4p′ and 3d94s(1D)4p″. The configurations 3d109f, 3d1010f, and 3d94s(3D)5s′ have been added and a number of levels of the configurations 3d94s(3D)4d′, 3d94s(1D)4d″, and 3d94s(3D)6s′ have been tentatively established. Our list of Zn II lines contains 363 classified lines.Improved wavelength measurements have necessitated a revision of our earlier report on the spectrum of Zn IV. All the energy levels have been shifted slightly with respect to the ground state doublet 3d92D. In addition, 3 of 17 even levels and 10 of 43 odd levels have been changed. The new energy-level scheme results in the classification of 329 spectral lines as compared with 200 lines in the previous report.

Theoretical and Experimental Investigation on Dipole Moment of Synthetized yt-Base in the Ground and Excited States

1979 ◽  
Vol 34 (2) ◽  
pp. 172-175 ◽  
Author(s):  
I. Gryczyński ◽  
Ch. Jung ◽  
A. Kawski ◽  
S. Paszyc ◽  
B. Skalski
Keyword(s):  
Experimental Investigation ◽  
Dipole Moment ◽  
Excited State ◽  
Excited States ◽  
Ground State ◽  
Fluorescence Spectra ◽  
Dipole Moments ◽  
Aprotic Solvents ◽  
Absorption And Fluorescence Spectra ◽  
First Excited State

Abstract The electric dipole moment of yt-Base calculated by the CNDO/S and JNDO/S method is μg = 3.42 D and μg = 3.74 D in the ground state and μe = 4.41 D and μe = 5.67 D in the first excited ππ*-state, respectively, μg and μe being nearly antiparallel. Measurements of absorption and fluorescence spectra of yt-Base in aprotic solvents of different polarity yielded μg = 3.8 D and μe = 4.3 D and the directions of dipole moments were found to be nearly antiparallel.This comparison may be considered as an indication for the ππ* character of the observable first excited state, although the CNDO/S-and JNDO/S-calculations predict a nπ*-state as the lowest lying excited state

Structure of free complement wavefunction for the ground and the first excited state of helium atom

2017 ◽  
Vol 16 (06) ◽  
pp. 1750048
Author(s):  
Mohammad Mostafanejad
Keyword(s):  
Excited State ◽  
Symmetric Group ◽  
Helium Atom ◽  
Excited States ◽  
Ground State ◽  
Triplet Excited State ◽  
Ground State Wavefunction ◽  
First Excited State ◽  
Orbital Exponents ◽  
Elegant Form

We review the fundamental ideas of free complement (FC) method through its application on both ground and first excited states of helium atom. We have found that lower energies can be obtained with fewer number of terms in the FC expansion of the ground state wavefunction. In this case, the optimization of orbital exponents was not necessary for achieving spectroscopic accuracy, especially at higher orders where the structure of the FC wavefunction converges to that of the exact one. We have discovered that permanents naturally appear in the FC expansion of the first triplet excited state wavefunction. Including permanents in the FC expansion is shown to be energetically important for the first triplet excited state of helium atom whereas it is not computationally favorable at higher orders. Finally, considering the group theoretical properties of the symmetric group [Formula: see text] and using immanants, a compact and more elegant form for the FC expansion of the first triplet excited state of the helium atom is achieved.

scholarly journals Ab Initio Study of the Possible Single-Center Units for Binuclear Iron Complex [Fe2(bpym)3Cl4]

2008 ◽  
Vol 3 (2) ◽  
pp. 114-118
Author(s):  
Andrei Tihonovschi
Keyword(s):  
Excited State ◽  
Ab Initio ◽  
Excited States ◽  
Ground State ◽  
Iron Complex ◽  
Ab Initio Study ◽  
Single Center ◽  
Singlet States ◽  
First Excited State ◽  
Binuclear Iron

In present work we study two possible single-center units for binuclear iron complex Fe2(bpym)3Cl4 –[Fe(bpym)3]2+ and Fe(bpym)2Cl2. The obtained ground states for both studied systems are singlet states. In the case of Fe(bpym)2Cl2 the lowest excited states were calculated to be 240cm-1 (triplet) and 660cm-1 (quintet) above the ground state and so are placed according to Lande rule. These states could be populated at room temperatures. For [Fe(bpym)3]2+ first excited state was found to be about 6000cm-1 above the ground state and so cannot be populated at normal temperatures.

Measurement of the reorientation effect in 24Mg

1970 ◽  
Vol 48 (1) ◽  
pp. 35-45 ◽  
Author(s):  
O. Häusser ◽  
B. W. Hooton ◽  
D. Pelte ◽  
T. K. Alexander ◽  
H. C. Evans
Keyword(s):  
Excited State ◽  
Matrix Element ◽  
Quadrupole Moment ◽  
Cross Sections ◽  
Ground State ◽  
Coulomb Excitation ◽  
Rotational Model ◽  
First Excited State ◽  
Scattering Cross Sections ◽  
Static Quadrupole

The reorientation effect in Coulomb excitation with 62 MeV 35Cl projectiles was used to measure the static quadrupole moment of the first excited state in 24Mg. From a comparison of the inelastic scattering cross sections at CM scattering angles of 123.1° and 72.8°, a static quadrupole moment of Q = −0.243 ± 0.035 b was deduced. The E2 matrix element connecting the ground state and first excited state was also measured and corresponds to 20.3 ± 1.4 W.u. for the 2+ → 0+ transition. The results are compared with predictions of the rotational model.

Band Mixing in the 2s–1d Shell: Application to 23Na

1974 ◽  
Vol 52 (1) ◽  
pp. 49-60 ◽  
Author(s):  
B. Haas ◽  
P. Taras
Keyword(s):  
Energy Level ◽  
Quadrupole Moment ◽  
Strong Coupling ◽  
Ground State ◽  
Level Scheme ◽  
Unified Model ◽  
Energy Level Scheme ◽  
Electromagnetic Transition ◽  
Ideal Candidate ◽  
Band Mixing

Formulas treating correctly hole excitations and the j2 term in the context of the strong coupling collective model are presented. It is found that such a treatment gives rise to appreciable differences from the usual band mixing calculations of nuclei in the 2s–1d shell. As an illustration, the nucleus 23Na will be discussed. This nucleus, with a large ground state quadrupole moment, seems to be an ideal candidate for the application of the unified model. Although the model reproduces the energy level scheme quite well, it fails, rather badly, to explain the observed electromagnetic transition properties of a number of levels.

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