Nuclear Data Sheets for A = 155

Reich, C.W.

doi:10.1016/j.nds.2004.12.001

Cited by 68 publications

(24 citation statements)

References 217 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Fig. 4, the X(3/4) model also agrees well with the experimental results of 155 Tb [38], which was also chosen as the X(5/2j+1) model candidate in [30]. The present X(3/2j+1) results seem little better in quantity than those of the X(5/2j+1) model shown in [30].…”

Section: Comparison With Experimental Resultssupporting

confidence: 80%

“…Firstly, the collective 3/2 + 2 and 1/2 + 1 levels based on the ground state in the theory are not observed in experiment. Two levels with (1/2 + , 3/2 + , 5/2 + ) at 508.395 keV and (3/2 + , 5/2 + , 7/2 + ) at 517.542 keV observed in the experiment [38] are noticeably too higher to be the two states predicted based on the ground state in the theory. Secondly, the 9/2 + 1 and 13/2 + 1 levels from the X(3/4) model are also noticeably higher than those observed in experiment.…”

Section: Comparison With Experimental Resultsmentioning

confidence: 60%

See 1 more Smart Citation

Simple description of odd-Anuclei around the critical point of the spherical to axially deformed shape phase transition

et al. 2011

View full text Add to dashboard Cite

An analytically solvable model, X(3/ 2j + 1), is proposed to describe odd-A nuclei near the X(3) critical point. The model is constructed based on a collective core described by the X(3) critical point symmetry coupled to a spin-j particle. A detailed analysis of the spectral patterns for j = 1/2, 3/2 cases is provided to illustrate dynamical features of the model. Through comparing the theory with experimental data and results of other models, it is found that the X(3/ 2j + 1) model can be taken as a simple yet very effective scheme to describe those odd-A nuclei with an even-even core at the critical point of the spherical to axially deformed shape phase transition. I. IntroductionRecently, critical point symmetries [1][2][3][4][5] have attracted considerable attention, since they provide benchmark results for the study of even-even nuclei as they undergo a transition between two different phases (shapes) [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. In particular, the critical point of the spherical to γ-unstable shape transition [1], called E(5), and the critical point from the spherical to axially deformed shape [2], called X(5), have been confirmed by experiment [23][24][25][26]. In view of their successful application in helping to understand even-even systems, it seems critical point symmetries in odd-A systems warrant further investigation. And since the low-lying structures of two adjacent nuclei with more or less than one neutron or proton should be driven by similar collective considerations, the critical point symmetries observed in even-even systems should also be evident in the adjacent odd-A nuclei. The first case of a critical point Bose-Fermi symmetry, called E(5/4) [27], was developed by Iachello to describe, analytically, the γ-soft critical point E(5) configuration coupled to a j = 3/2 particle.135 Ba was suggested as an empirical example of E(5/4) symmetry, with a report of a detailed analysis given in [28]. While these results show significant agreement between theory and experiment, there are also some differences. Another critical point Bose-Fermi symmetry, called E(5/12) [29], was developed by Alonso, Arias, and Vitturi, who extended the case of the E(5/4) symmetry with a spin-j particle into the multi-j case with j = 1/2, 3/2, 5/2. Both the E(5/4) and E(5/12) models were developed to describe odd-A nuclei near even-even nuclei that display the E(5) critical point symmetry [1]; that is, nuclei in the spherical to γ-unstable transitional region. As the X(5) symmetry seems well confirmed in experiment [2], it provides a better test for exploring effects of the X(5) critical point symmetry in odd-A nuclei near the even-even partners at the X(5) critical point. Very recently, in the same spirit as the E(5/4) and E(5/12) examples, an X(5/ 2j+1) model that coupled a spin-j particle to the X(5) symmetry core was advanced [30].In this article, we propose an exactly solvable model, called X(3/ 2j+1), based on the X(3) critical point symmetry [5]. Although the original X(5/ ...

show abstract

Section: Comparison With Experimental Resultssupporting

confidence: 80%

Section: Comparison With Experimental Resultsmentioning

confidence: 60%

Simple description of odd-Anuclei around the critical point of the spherical to axially deformed shape phase transition

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The placement suggested in our measurement is also presented in this table (indicated by the desexcitation energy level); a decay scheme is shown in Fig.1. Two γ-transitions at 205.7keV and 224.8keV were observed for the first time in beta decay studies, but our data revealed no evidence for photopeaks at: 53, 63, 65, 80, 90, 183, 220, 280, 665, 758, 818, 830, 861, 880, 911, 1018 and 1096keV, observed in previous works [1][2][3]11]. We could not calculate the upper intensity limits [12] of these unobserved gamma rays due to proximity of them to a lot of γ-transitions following 155 Sm decay.…”

Section: Resultscontrasting

confidence: 72%

“…The measured gamma-ray energies and relative intensities are listed in Table I and compared with the last compilation performed by Reich [11]. The placement suggested in our measurement is also presented in this table (indicated by the desexcitation energy level); a decay scheme is shown in Fig.1.…”

Section: Resultsmentioning

confidence: 93%

Decay of 155Sm

et al. 2005

View full text Add to dashboard Cite

The beta decay of 155 Sm (T 1/2 ∼ 22min) has been investigated by gamma spectroscopy measurements. The single and coincidence spectra were taken using HPGe detectors with high energy resolution. The energy and relative intensities of 42 γ-rays have been determined, most of them with a better precision than previously. The γ-transitions at 205.7keV and 224.8keV were observed for the first time and 40 of them were confirmed and 39 of them placed in the decay scheme. The present results, together with the results of earlier studies, allows to confirm the energy levels, in the energy range 0.05-1.6MeV, as well as the assignments of spin for most of them.

show abstract

“…Figure 5 shows the yields measured for the most volatile Ln isotopes released without fluorination by UC x pellets heated at ∼ 2050 • C. The spectroscopic data required to extract the yields from the γ spectra, in particular the half-lives and the absolute γ intensities, were taken from refs. [16][17][18][19][20]. This result proves that the Ln photo-fission cross sections are sufficient to allow the observation of Ln mass-separated ion beams provided that the target temperature is high enough.…”

Section: From the Off-line Testssupporting

confidence: 52%

Production of lanthanide molecular ion beams by fluorination technique

Roussière¹,

Deloncle²,

Barré-Boscher³

et al. 2016

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Ionization and dissociation of molecular ion beams caused by ultrashort intense laser pulses I Ben-Itzhak, A M Sayler, P Q Wang et al. Abstract. Systematic off-line fluorination studies on all the stable lanthanide isotopes have been performed. The results are presented as a function of various parameters such as the target temperature, the type of ion source used (hot plasma or surface ionization) and the quantity of CF4 introduced. The first on-line measurements allowed us to determine the optimal experimental conditions for producing radioactive lanthanide isotopes.

show abstract

Nuclear Data Sheets for A = 155

Cited by 68 publications

References 217 publications

Simple description of odd-Anuclei around the critical point of the spherical to axially deformed shape phase transition

Simple description of odd-Anuclei around the critical point of the spherical to axially deformed shape phase transition

Decay of 155Sm

Production of lanthanide molecular ion beams by fluorination technique

Contact Info

Product

Resources

About