Low-
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Z</mml:mi></mml:math>
 boundary of the 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>88</mml:mn></mml:mrow></mml:math>
–90 shape phase transition: 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ce</mml:mi><mml:mprescripts /><mml:none /><mml:mn>148</mml:mn></mml:mmultiscripts></mml:math>
 near the critical point

Koseoglou, P.; Werner, V.; Pietralla, N.; Ilieva, S.; Nikšić, Tamara; Vretenar, Dario; Alexa, Petr; Thürauf, M.; Bernards, C.; Blanc, A.; Bruce, A. M.; Cakirli, R. B.; Cooper, Natalie; Fraile, L. M.; Jentschel, M.; Jolie, J.; Köster, U.; Körten, W.; Kroll, Thilo; Lalkovski, S.; Mach, H.; Mărginean, N.; Mutti, P.; Patel, Z.; Paziy, V.; Podolyák, Zs.; Regan, P.H.; Régis, J.-M.; Roberts, O. J.; Saed-Samii, N.; Simpson, G. S.; Söldner, T.; Ur, C. A.; Urban, W.; Wilmsen, D.; Wilson, E.

doi:10.1103/physrevc.101.014303

Cited by 12 publications

(12 citation statements)

References 49 publications

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“…As it was shown in Ref. [10] this increased axial asymmetry plays an important role in the comparison with the geometrical symmetries and the placement of 148 Ce in the deformed side of the symmetry triangle. This picture was also supported by microscopic calculations for the isotope.…”

Section: Discussionmentioning

confidence: 61%

“…The N = 90 isotones are in "bold" for easier comparison. the R 4/2 ratio was used to place it along a line [10]. One can see the increasing γ asymmetry along the cerium isotopic chain, by increasing neutron number.…”

Section: Ibm-1 Calculationsmentioning

confidence: 99%

“…Some of these studies can be found in Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Several symmetries and models describing nuclei in this region have been developed.…”

mentioning

confidence: 99%

“…The position of the band-head of the γ-band (the 2 + γ state) for each isotope, with respect to the ground-band, is shown with 1 → 0 + 1 ) = 100. The B(E2) values are taken from [17], beside for 148 Ce which is taken from [10].…”

mentioning

confidence: 99%

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N = 90 Shape Phase Transition: Increasing Axial Asymmetry Towards 148Ce

Koseoglou¹

2022

Bulg.J.Phys.

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In this proceedings the increasing axial asymmetry in the N = 90 isotopes with decreasing atomic number from 152 Sm to 148 Ce is shown. The placement of the nuclei of interest into the Interacting Boson Model symmetry triangle and the calculations of the approximate effective γ deformation shows the existence of some axial asymmetry, γ appr eff ≈ 10 • , in 148 Ce, while the N = 90 152 Sm does not show any. Moreover, the shape evolution study of the cerium, neodymium and samarium chains shows the over all increasing axially asymmetry with decreasing atomic number.KEY WORDS: Shape phase transition, N = 90, cerium isotopic chain, 148 Ce, γ degree of freedom, approximate effective γ deformation.

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Section: Discussionmentioning

confidence: 61%

Section: Ibm-1 Calculationsmentioning

confidence: 99%

“…Some of these studies can be found in Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Several symmetries and models describing nuclei in this region have been developed.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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N = 90 Shape Phase Transition: Increasing Axial Asymmetry Towards 148Ce

Koseoglou¹

2022

Bulg.J.Phys.

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“…When combined with VAMOS, additional shielding had to be applied due to fringing magnetic fields interfering with the photomultiplier tubes of the detectors (see Section 4.3). Detectors discussed in this work have also been in use during the EXILL+FATIMA campaign at the ILL, Grenoble, France (see for instance [44]), and at measurements with the RoSPHERE array in Bucharest, Romania (see e.g. [45]).…”

Section: Fatima On the Roadmentioning

confidence: 99%

FATIMA — FAst TIMing Array for DESPEC at FAIR

Rüdigier

Podolyák

Regan

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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The components, working principle and characteristics of FATIMA (FAst TIMing Array), a fast-timing detector system for DESPEC at FAIR, are described. The core system includes 36 LaBr 3 (Ce) scintillator detectors, a mounting frame for the DESPEC station and a VME-based fast-timing data acquisition system. The current electronic timing circuit is based on V812 constant fraction discriminators and V1290 time-to-digital converters. Gamma-ray energies are measured using V1751 digitisers. Characteristics of the core FATIMA system including efficiency, energy, and coincidence resolving time, as well as limitations, are discussed on the basis of test measurements performed in the S4 cave at GSI, Germany. The coincidence -time resolution for the prompt 60 Co cascade is determined to be ∼320 ps full width at half maximum. The total full energy peak efficiency at 1 MeV for the 36 detector array in the DESPEC setup is 2.9%. The energy-dependent prompt response centroid curve with the current CFD/TDC combination is shown to be smooth; the centroid shift method can be applied for the measurement of half-lives below 200 ps. An overview of applications of the FATIMA detectors as an ancilliary system in combination with other detector arrays during recent years is given. Data on the operation of the detectors in the presence of magnetic fields are presented.

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Gamma-ray spectroscopy of fission fragments with state-of-the-art techniques

2022

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The paper reviews recent developments in $$\gamma $$ γ -ray spectroscopy of the neutron-rich fragments produced in nuclear fission. This subject has been an intensive area of study spanning more than five decades. Here we highlight key results and describe the evolution of the associated experimental techniques since the last review papers in 1995 (I. Ahmad and W.R. Phillips, Rep. Prog. Phys. 58(11), 1415 (1995); J. H. Hamilton et al., Prog. Part. Nucl. Phys. 35, 635(1995)). Research themes in nuclear structure will be explored along with the fission reaction mechanism and the links to nuclear astrophysics and applications.

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Low- Z boundary of the N=88 –90 shape phase transition: Ce148 near the critical point

Cited by 12 publications

References 49 publications

N = 90 Shape Phase Transition: Increasing Axial Asymmetry Towards 148Ce

N = 90 Shape Phase Transition: Increasing Axial Asymmetry Towards 148Ce

FATIMA — FAst TIMing Array for DESPEC at FAIR

Gamma-ray spectroscopy of fission fragments with state-of-the-art techniques

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