Nuclear Data Sheets update for A = 117

Blachot, J.; Marguier, G.

doi:10.1016/0090-3752(92)80075-u

Cited by 21 publications

(4 citation statements)

References 173 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figs. 3, 4 and 5 the calculated energies of the various seniority-one states are compared with experiment [26][27][28][29][30][31][32][33][34][35][36][37][38][39] for all the odd nuclei with 1074A4129. In the low-energy experimental spectrum of most of these nuclei there is more than one level with angular momentum and parity corresponding to one of the valence s.p.…”

Section: Iii2 Odd-mass Nucleimentioning

confidence: 99%

Pairing effects in Sn isotopes

Andreozzi

Coraggio

Covello

et al. 1996

Z. Phys. A — Hadrons and Nuclei

View full text Add to dashboard Cite

An extensive study of pairing effects in the Sn isotopes is carried out. The pairing Hamiltonian is treated by the chain-calculation method which provides practically exact solutions while involving less computational work than a complete-basis diagonalization. The coupling strength is fixed by reproducing the energy of the 9\ state in Sn, while the single-particle energies have been determined by an analysis of the experimental low-energy spectra of the odd-A isotopes. A detailed comparison of the calculated results with experimental data evidences the importance of neutron pairing correlations in the 50-82 shell. The results of this paper complement those of our previous study of the N"82 isotones. It turns out that the role of pairing correlations is similar to a large extent in both cases.

show abstract

Section: Iii2 Odd-mass Nucleimentioning

confidence: 99%

Pairing effects in Sn isotopes

Andreozzi

Coraggio

Covello

et al. 1996

Z. Phys. A — Hadrons and Nuclei

View full text Add to dashboard Cite

show abstract

“…at 1378.9, 1471.7, 1535.6, and 1751. 8 keV excitation are quoted [6] as seen only in the (p, n) reaction [11].…”

Section: Thementioning

confidence: 99%

“…This picture, simple in principle, has never been tested in detail, however, since for most of these levels the electromagnetic transition probabilities are unknown. In this work we present the first measurements of lifetimes of the low-lying levels in Sb and "Sb. The existing information on the properties of these levels concerns mostly excitation energies and J values and comes mainly from studies of the (p, np) reaction and light-particle induced transfer reactions [5,6]. We perform DSA measurements in the (p, n) reaction, which, although providing rather low recoil velocities, has the advantage that it can be performed almost at the threshold and thus populate directly only the levels of interest.…”

Section: Introductionmentioning

confidence: 99%

Doppler-shift attenuation method lifetime measurements inSb115andSb
Bucurescu
¹
,
Căta-Danil
²
,
Ilas
³

et al. 1995
Phys. Rev. C
9
0
1
0
View full text Add to dashboard Cite

“…The present NRF setup does not allow to deduce parities for levels in odd-mass nuclei. In the energy region under consideration only a few levels are known from other experiments [13]. More details on the experimental analysis and the complete information on observed transitions will be published in a forthcoming article.…”

mentioning

confidence: 99%

Strong Fragmentation of Low-Energy Electromagnetic Excitation Strength in117Sn

et al. 1999

View full text Add to dashboard Cite

Results of nuclear resonance fluorescence experiments on117 Sn are reported. More than 50 γ transitions with Eγ < 4 MeV were detected indicating a strong fragmentation of the electromagnetic excitation strength. For the first time microscopic calculations making use of a complete configuration space for low-lying states are performed in heavy odd-mass spherical nuclei. The theoretical predictions are in good agreement with the data. It is concluded that although the E1 transitions are the strongest ones also M 1 and E2 decays contribute substantially to the observed spectra. During the last years the study of the properties of multi-phonon excitations in atomic nuclei has been one of the key topics in nuclear structure research. The main motivation for these studies is to gain insight into the applicability of a picture of harmonic excitations to a finite strongly interacting fermion system, like an atomic nucleus. At present, systematic experimental information on the properties of low-lying two-phonon states [1-3] as well as on two-phonon giant resonances [4,5] in even-even spherical nuclei is available.The 1 − component of a two-phonon quintuplet built up of collective quadrupole and octupole phonons, [2, is a very good candidate for the investigation of anharmonic properties of low-lying excited states. This state is practically a pure two-phonon state with very weak admixtures of other configurations [3]. In addition, a tool which is very selective to its excitation, namely nuclear resonance fluorescence (NRF), is available. The main conclusion from systematic studies [2,3,[6][7][8] [11] have been reported. From very general arguments one expects rather weak changes in the properties of collective vibrations when they are coupled to an odd quasiparticle. However, even the first NRF experiments indicate a rather strong fragmentation of the excitation strength. To minimize the number of possible excited levels it is imperative to consider this coupling of collective vibrations to an odd quasiparticle in a nucleus with ground state spin 1/2.In the present letter we report on NRF experiments on 117 Sn (J π g.s. = 1/2 + ) in which 59 transitions with E γ < 4.05 MeV have been observed. It is clear that a detailed theoretical analysis which provides information on the structure of the excited states, is necessary to explain the results of this experiment. For this reason a full microscopic calculation of the properties of multi-phonon states in heavy odd-mass spherical nuclei has been performed for the first time.Experimental results have been obtained at the bremsstrahlung NRF-facility at the 4.3 MV Dynamitron accelerator of the Stuttgart University [1]. The electron energy was 4

show abstract

Nuclear Data Sheets update for A = 117

Cited by 21 publications

References 173 publications

Pairing effects in Sn isotopes

Pairing effects in Sn isotopes

Doppler-shift attenuation method lifetime measurements inSb115andSb
Bucurescu
¹
,
Căta-Danil
²
,
Ilas
³

et al. 1995
Phys. Rev. C
9
0
1
0
View full text Add to dashboard Cite

Strong Fragmentation of Low-Energy Electromagnetic Excitation Strength in117Sn

Contact Info

Product

Resources

About

Nuclear Data Sheets update for A = 117

Cited by 21 publications

References 173 publications

Pairing effects in Sn isotopes

Pairing effects in Sn isotopes

Doppler-shift attenuation method lifetime measurements inSb115andSbBucurescu1, Căta-Danil2, Ilas3 et al. 1995Phys. Rev. C9010View full textAdd to dashboardCite

Strong Fragmentation of Low-Energy Electromagnetic Excitation Strength in117Sn

Contact Info

Product

Resources

About

Doppler-shift attenuation method lifetime measurements inSb115andSb
Bucurescu
¹
,
Căta-Danil
²
,
Ilas
³

et al. 1995
Phys. Rev. C
9
0
1
0
View full text Add to dashboard Cite